Vestigial Or Single Sideband Or Suppressed Carrier Patents (Class 375/270)
  • Patent number: 10142143
    Abstract: This receiving apparatus achieves circuit size reduction and consumption power reduction, while still having an advantage of high-speed processing. In a receiving apparatus (100), a frequency component detector (105) has a Fourier conversion operation unit provided therein, and performs high-speed Fourier conversion with respect to digital signals outputted from an ADC (104), said high-speed Fourier conversion being performed within a range instructed by means of an operation range control unit (106), and the frequency component detector detects a plurality of frequency components (FFT signals) of the digital signals. The operation range control unit (106) sets, using the FFT signals outputted from the frequency component detector (105), the frequency range within which the Fourier conversion operation is to be performed, and instructs the range to the frequency component detector (105).
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: November 27, 2018
    Assignee: PANASONIC CORPORATION
    Inventors: Masahiko Sagisaka, Yoichiro Horiuchi
  • Patent number: 9967908
    Abstract: In a direct mode two-way radio frequency communications system having a plurality of direct mode traffic channels, a first direct mode subscriber unit (DMSU) monitors a preconfigured direct mode control channel (DMCC), the DMCC being a channel that is monitored by all DMSUs that are idle in the system, and which is time divided into slots including traffic channel status slots (TCSSs), each TCSS associated with another physical direct mode traffic channel (DMTC) in the communication system. Responsive to detecting a request to initiate a new call, the DMSU selects a first DMTC on which to transmit the call, transmits during the next TCSS of the DMCC associated with the selected DMTC a header indicating the first DMSU's intention to transmit a new call on the selected DMTC, and subsequently switches to the selected DMTC and transmits the new call.
    Type: Grant
    Filed: May 10, 2013
    Date of Patent: May 8, 2018
    Assignee: MOTOROLA SOLUTIONS, INC.
    Inventors: Quan-Wen Du, Yueh Ching Chung, Yu-Yang Zheng
  • Patent number: 9559879
    Abstract: A power amplifier cell includes a first input arranged to receive an in-phase control signal, a second input arranged to receive a quadrature control signal, an input stage arranged to output a drive signal based at least partly on the received in-phase and quadrature control signals, and an output stage arranged to receive at an input thereof the drive signal output by the input stage, and to generate an output signal for the power amplifier cell in response to the received drive signal.
    Type: Grant
    Filed: May 19, 2014
    Date of Patent: January 31, 2017
    Assignee: Mediatek Singapore Pte. Ltd.
    Inventors: Zhiming Deng, Chun-Hsien Peng
  • Patent number: 9516486
    Abstract: A device providing an emergency alert service includes an RS frame encoder configured to generate an RS frame in a manner of performing an RS (Reed-Solomon)-CRC (Cyclic Redundancy Check) encoding on an ensemble comprising a mobile data for a mobile broadcasting service and a service signaling channel containing an access information on the mobile broadcasting service, a divider configured to divide the generated RS frame into a plurality of RS frame portions, a signaling encoder configured to generate a signaling data comprising a TPC (Transmission Parameter Channel) for signaling a transmission parameter of the mobile broadcasting and a FIC (Fast Information Channel) containing a connection information between the ensemble and the broadcasting service, and a data group formatter configured to generate a data group containing a part of the signaling data and the RS frame portion.
    Type: Grant
    Filed: December 8, 2015
    Date of Patent: December 6, 2016
    Assignee: LG ELECTRONICS INC.
    Inventors: Sejin Oh, Jeongwoo Kim, Minsung Kwak
  • Patent number: 9444761
    Abstract: A computer implemented method, computer program product, and system for performing create, read, update, or delete operations on a plurality of resources in a client-server environment. In an embodiment, the computer implemented method includes the steps of identifying individual resources requiring operations to be performed, assigning local references for any resources to which a URI (Uniform Resource Identifier) has not been provided by the server, generating metadata describing the local references and operations to be performed, wrapping each individual resource with the metadata to provide a plurality of wrapped resources arranging the wrapped resources into a single payload, and transmitting the single payload to the server.
    Type: Grant
    Filed: January 28, 2016
    Date of Patent: September 13, 2016
    Assignee: International Business Machines Corporation
    Inventor: Thomas A. Evans
  • Patent number: 9398068
    Abstract: A computer implemented method, computer program product, and system for performing create, read, update, or delete operations on a plurality of resources in a client-server environment. In an embodiment, the computer implemented method includes the steps of identifying individual resources requiring operations to be performed, assigning local references for any resources to which a URI (Uniform Resource Identifier) has not been provided by the server, generating metadata describing the local references and operations to be performed, wrapping each individual resource with the metadata to provide a plurality of wrapped resources arranging the wrapped resources into a single payload, and transmitting the single payload to the server.
    Type: Grant
    Filed: February 20, 2014
    Date of Patent: July 19, 2016
    Assignee: International Business Machines Corporation
    Inventor: Thomas A. Evans
  • Patent number: 9325356
    Abstract: An SSB transmitter includes a digital-to-digital converter generating first and second real signal components as a function of a complex input signal supplied to the transmitter, and a digital Hilbert transformation module coupled with the digital-to-digital converter and operative to generate first and second transformed signals as a function of the first and second real signal components. The transmitter further includes first and second bit-stream generators operative to generate first and second analog signals as a function of the first and second transformed signals, respectively. The transmitter includes first and second amplifiers. The first amplifier is operative to generate a first amplified signal as a function of the first analog signal. The second amplifier is operative to generate a second amplified signal as a function of the second analog signal. An analog hybrid coupler is connected with the first and second amplifiers and operative to perform an analog Hilbert transformation.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: April 26, 2016
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventors: Peter Kiss, Said E. Abdelli, Donald R. Laturell, James F. MacDonald, Steven C. Pinault, Ross S. Wilson
  • Patent number: 9172502
    Abstract: Provided is a receiving apparatus that includes a receiving unit which receives a trellis-coded modulation signal in which data items modulated by a plurality of trellis-coded modulators have been multiplexed; a data processing unit which arranges the data items multiplexed in the trellis-coded modulation signal received by the receiving unit so that a given number of data items modulated by one of the trellis-coded modulators are arranged consecutively in first order in which the data items modulated by one of the trellis-coded modulators have been modulated as arrangement processing and the arrangement processing is repeated in remaining trellis-coded modulators; a trellis decoding unit which performs trellis decoding of the data items arranged by the data processing unit, thereby producing decoded data items; and a data rearranging unit which rearranges the decoded data items in second order in which the decoded data items have been multiplexed in the trellis-coded modulation signal.
    Type: Grant
    Filed: August 21, 2013
    Date of Patent: October 27, 2015
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Tsutomu Asahina
  • Patent number: 9054762
    Abstract: A transmitter circuit with a passive mixer network includes a first outbound signal path configured to carry a first outbound signal. The transmitter circuit includes a second outbound signal path configured to carry a second outbound signal. The transmitter circuit includes N passive mixers coupled to the first and second outbound signal paths and configured to up-convert the first and second outbound signals from a first frequency to a second frequency based on a clock cycle, where N is a positive even integer. The first and second outbound signals are passed through the N passive mixers during each phase of 2*N phases in the clock cycle. The transmitter circuit also includes N radio frequency signal paths coupled to an output of respective ones of the N passive mixers and configured to receive the first and second outbound signals in the second frequency during each phase of the clock cycle.
    Type: Grant
    Filed: May 17, 2013
    Date of Patent: June 9, 2015
    Assignee: Broadcom Corporation
    Inventors: Ahmad Mirzaei, Mohyee Salahelden Mikhemar, Meng-An Pan, Rahul Magoon
  • Patent number: 8976878
    Abstract: In one aspect, a method includes performing a mapping on bits to form a complex data symbol, applying a frequency rotation mask to the complex data symbol based on a polynomial phase, performing an inverse discrete Fourier transform (IDFT) after applying the frequency rotation mask, applying a time domain window after performing the IDFT, converting digital data to analog data after applying the time window and transmitting the analog data as an analog signal.
    Type: Grant
    Filed: January 15, 2013
    Date of Patent: March 10, 2015
    Assignee: Raytheon Company
    Inventors: David G. Manzi, Pranav Patel, Kevin R. Albrecht, Rajesh Kulkarni, Michael C. Brown, Sam M. Daniel
  • Patent number: 8861581
    Abstract: Provided is a receiver for processing VSB signal. The receiver includes a first equalizer/decoder unit and a second equalizer/decoder unit. The first equalizer/decoder unit performs a first equalizing operation, first TCM decoding and first RS decoding on a received symbol to output a first dibit. The second equalizer/decoder unit performs a second equalizing operation, second TCM decoding and second RS decoding on the received symbol to output a transport stream. The first dibit is provided as a priori information for a soft-decision operation of the second TCM decoding.
    Type: Grant
    Filed: April 5, 2011
    Date of Patent: October 14, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: DoHan Kim, Sergey Zhidkov, Beom kon Kim
  • Patent number: 8830107
    Abstract: A frequency translating analog-to-digital converter for receiving an analog band-pass signal is described. The analog-to-digital converter comprises an adder/input block for receiving the analog band-pass signal and an analog band-pass feedback signal, thereby forming an analog band-pass error signal. The analog-to-digital converter has at least one analog mixer for mixing and down converting the analog band-pass error signal and thus generating a down-converted analog error signal and at least one quantization path for generating at least one digital signal.
    Type: Grant
    Filed: April 16, 2013
    Date of Patent: September 9, 2014
    Inventor: Udo Karthaus
  • Patent number: 8774292
    Abstract: A data transfer system includes a transmission circuit, which operates by a first clock signal, and a receiving circuit, which operates by a second clock signal different from the first clock signal. The transmission circuit includes an output circuit that outputs a poll signal, of which a level is logically inverted in accordance with a transmission timing of transmission data from the transmission circuit to the receiving circuit. A first signal generating circuit receives the transmission data at a plurality of timings and generates plural sets of reception data corresponding to the plurality of timings. A second signal generating circuit receives the poll signal at the plurality of timings and generates synchronous poll signals corresponding to the plurality of timings. A data selecting circuit compares levels of the synchronous poll signals with each other and selects one of the sets of reception data based on the comparison result.
    Type: Grant
    Filed: November 7, 2012
    Date of Patent: July 8, 2014
    Assignee: Fujitsu Semiconductor Limited
    Inventor: Satoshi Takashima
  • Patent number: 8761288
    Abstract: A multiuser downlink multiple-input multiple-output (MIMO) system with limited channel information feedback includes an error-free channel vector quantization scheme. Each user has multiple antennas, and the base station includes a matching number of antennas. Each MIMO channel is measured at the terminus end of a corresponding user, and used to obtain the channel state information at the receiver (CSIR). A few data bits of CSIR information are feed back to the base station through the limited feedback channels. The base station collects all these CSIR feedback data bits into a CSI at the transmitter (CSIT). The CSIT is used to determine which users are served, and how to configure a corresponding multi-user precoder. The user data channels will later all be transmitted through such precoder. A codebook of channel quantization vectors is pre-defined and distributed amongst the base station and all the users.
    Type: Grant
    Filed: February 26, 2009
    Date of Patent: June 24, 2014
    Assignee: NXP, B.V.
    Inventors: Wei Miao, Min Huang, Shindong Zhou, Gang Wu
  • Patent number: 8750803
    Abstract: A method, apparatus, system, and computer program product example embodiments of the invention are disclosed to reduce interference of predictive signal transmissions between wireless devices. In an example embodiment, a wireless receiver is configured to receive a composite signal, wherein the composite signal includes at least a beacon component comprising a regular beacon symbol. The wireless receiver is configured to determine from the beacon component, a predicted reception of a predicted future beacon symbol, using a known beacon transmission pattern. The wireless receiver is configured to cancel from the composite signal a future received beacon symbol, based at least partly on the predicted future beacon symbol.
    Type: Grant
    Filed: June 17, 2009
    Date of Patent: June 10, 2014
    Assignee: Nokia Corporation
    Inventor: Markus Nentwig
  • Patent number: 8717147
    Abstract: Disclosed are a passive RFID (Radio Frequency Identification) system and method capable of recognizing a great deal of tags at a high speed. A reader of a passive RFID system, including: a processor dividing slots and subchannels to configure a round, recognizing subchannels that are not involved in a collision and interference by the slots, and changing the subchannels that are not involved in a collision and interference, into a sleep state; a transmission unit encoding a command generated through the processor, performing an amplitude jitter modulation on the encoded command, and transmitting the modulated command; and a reception unit acquiring and demodulating tag signals received through a plurality of subchannels by the slots, and providing the demodulated tag signals to the processor.
    Type: Grant
    Filed: September 21, 2010
    Date of Patent: May 6, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Ji Hoon Bae, Cheng Hao Quan, Dong Han Lee, Chan Won Park, Won Kyu Choi, Kwang Soo Cho, Man Sik Park, Gil Young Choi, Jong Suk Chae
  • Patent number: 8699600
    Abstract: A frequency and data synchronization control system through the 8VSB SFN DTx modulation prevents the deterioration of the digitally broadcasted receiving sensitivity caused by a discrepancy of the frequency or data between the receiver of the digital broadcasting signal and the distributed translator or between distributed translators.
    Type: Grant
    Filed: February 23, 2011
    Date of Patent: April 15, 2014
    Assignee: K-Tech Telecommunications, Inc
    Inventor: Steve Kuh
  • Patent number: 8659456
    Abstract: An embodiment of the invention provides an electronic device. The electronic device includes a digital-to-analog converter (DAC), a transmitter front-end (TX FE), an amplifier, an analog-to-digital converter (ADC), and a swap circuitry. The TX FE has a first and a second input end coupled to a first and a second output end of the DAC, respectively. The ADC has a first and a second input end coupled to a first and a second output end of the amplifier, respectively. The swap circuitry is configured to couple the first and second output ends of the DAC to a first and a second input end of the amplifier in a normal state, respectively, and couple the first and second output ends of the DAC to the second and first input ends of the amplifier in a swapped state, respectively.
    Type: Grant
    Filed: September 11, 2012
    Date of Patent: February 25, 2014
    Assignee: Mediatek Inc.
    Inventors: Hsiang-Hui Chang, Hsin-Hung Chen, Chi-Yun Wang, Chih-Jung Chen
  • Patent number: 8626227
    Abstract: In accordance with embodiments of the present disclosure, a method and system for allocating power in a transmission system may be provided. A method may include determining a channel quality for each of a plurality of subcarriers, wherein the channel quality for each individual subcarrier is equal to the signal-to-interference and noise ratio for the individual subcarrier divided by the power allocated to the subcarrier. The method may also include allocating power to a subset of the plurality of subcarriers, wherein each individual subcarrier of the subset has a channel quality greater then each individual subcarrier not of the subset. The method may further include transmitting a signal on each of the individual subcarriers of the subset.
    Type: Grant
    Filed: December 13, 2010
    Date of Patent: January 7, 2014
    Assignee: Fujitsu Limited
    Inventors: Chenxi Zhu, Wei-Peng Chen
  • Patent number: 8605830
    Abstract: Systems and methods and memory media for performing modulation type detection. An attempt is made to estimate an underlying symbol rate of a received signal. The received signal is compensated for carrier frequency offset. Two candidates for symbol timing offset are estimated from the compensated signal. The compensated signal is downsampled using each offset candidate. A set of features is computed for each of the two downsampled signals. For each downsampled signal, the set of features is compared to a corresponding set of thresholds to obtain a corresponding set of comparison results. The two sets of comparison results are used to determine the modulation type of the received signal. A second method for estimating symbol rate may be performed if the modulation type is found to be FSK.
    Type: Grant
    Filed: December 23, 2010
    Date of Patent: December 10, 2013
    Assignee: National Instruments Corporation
    Inventors: Ankit Sethi, Baijayanta Ray
  • Patent number: 8542709
    Abstract: A digital broadcast transmitting/receiving system and a method for processing data are disclosed. The method for processing data may enhance the receiving performance of the receiving system by performing additional coding and multiplexing processes on the traffic information data and transmitting the processed data. Thus, robustness is provided to the traffic information data, thereby enabling the data to respond strongly against the channel environment which is always under constant and vast change.
    Type: Grant
    Filed: December 14, 2011
    Date of Patent: September 24, 2013
    Assignee: LG Electronics Inc.
    Inventors: Jin Pil Kim, Young In Kim, Ho Taek Hong, In Hwan Choi, Kook Yeon Kwak, Hyoung Gon Lee, Byoung Gill Kim, Jin Woo Kim, Jong Moon Kim, Won Gyu Song
  • Patent number: 8526542
    Abstract: A diversity receiver configured to receive digital signals, including a first modulator configured to receive a first signal and modulate the first signal to first data, a second modulator configured to receive a second signal and modulate the second signal to second data, a path aligner configured to detect starting points of the first data and the second data and generate a control signal for synchronizing the first data and the second data, and an equalizer/decoder configured to synchronize the first and second data and to generate a signal to noise ratio and an equalizer output by a recursive equalization operation for the diversity signals thus synchronized.
    Type: Grant
    Filed: April 25, 2011
    Date of Patent: September 3, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: DoHan Kim, Sergey Zhidkov, Beom kon Kim
  • Patent number: 8503347
    Abstract: A transmitting system, a receiving system, and a method for processing a broadcast signal are disclosed. The receiving system comprises a tuner, a channel equalizer, a turbo decoder, a demultiplexer, a first error correction decoder, a block deinterleaver, and a second error correction decoder. The tuner receives a broadcast signal including a data group. The data group comprises mobile service data, regularly spaced known data sequences, and signaling data. The turbo decoder performs turbo decoding for the signaling data included in the channel equalized broadcast signal in the channel equalizer. The block deinterleaver performs block deinterleaving for the turbo-decoded FIC data in a block unit of TNoG (the number of all data groups assigned to one subframe)×51 bytes.
    Type: Grant
    Filed: March 31, 2010
    Date of Patent: August 6, 2013
    Assignee: LG Electronics Inc.
    Inventors: Won Gyu Song, Byoung Gill Kim, Hyoung-Gon Lee, In Hwan Choi, Jin Woo Kim
  • Patent number: 8493973
    Abstract: A method of processing a digital broadcasting signal includes generating a transport stream including a plurality of transport packets; selecting one of the transport packets as a starting packet to be mapped into a first data segment of an encoded data frame; and constructing deterministic data frames in the transport stream beginning with the starting packet; wherein at least one of the 52 transport packets does not have an adaptation field; wherein all remaining ones of the 52 transport packets do have an adaptation field; and wherein the at least one transport packet that does not have an adaptation field is provided at a fixed location in each of the slices.
    Type: Grant
    Filed: March 28, 2007
    Date of Patent: July 23, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hae-joo Jeong, Jung-pil Yu, Joon-soo Kim, Yong-sik Kwon, Eui-Jun Park, Jin-hee Jeong, Kum-ran Ji, Jong-hun Kim
  • Patent number: 8494083
    Abstract: An apparatus and method for transmitting digital broadcast signal are provided. The apparatus includes a group formatter to format a data group including mobile service data, where the group formatter further maps the mobile service data into a data group of interleaved format, adds N training sequences into a corresponding location of the data group of interleaved format, adds signaling data into the data group of interleaved format, inserts place holder bytes for MPEG header and non-systematic Reed-Solomon (RS) parity into the data group of interleaved format, and deinterleaves the mobile service data in the data group of interleaved format, a non-systematic RS encoder to non-systematic RS encode the mobile service data in the formatted data group and insert non-systematic RS parity obtained from the non-systematic RS encoding into the formatted data group.
    Type: Grant
    Filed: January 13, 2012
    Date of Patent: July 23, 2013
    Assignee: LG Electronics Inc.
    Inventors: Hyoung Gon Lee, Byoung Gill Kim, Won Gyu Song, In Hwan Choi, Jin Woo Kim
  • Patent number: 8488667
    Abstract: A digital television (DTV) transmitter includes a first randomizer randomizing enhanced data; a Reed-Solomon (RS) frame encoder generating an RS frame; a block processor encoding data in the RS frame, outputting data symbols, interleaving the data symbols, and converting the interleaved data symbols into data bytes; a group formatting unit mapping the data bytes into data groups; a deinterleaver deinterleaving data of the data groups; a packet formatter outputting enhanced data packets; a multiplexer multiplexing the enhanced data packets with main data packets; a second randomizer randomizing the multiplexed main data packets and MPEG header data in the multiplexed enhanced data packets; a Reed-Solomon (RS) encoder RS encoding the multiplexed enhanced data packets; an interleaver interleaving data of the RS-encoded data packets; and a trellis encoding unit trellis encoding the interleaved data.
    Type: Grant
    Filed: December 7, 2011
    Date of Patent: July 16, 2013
    Assignee: LG Electronics Inc.
    Inventors: Sung Ryong Hong, In Hwan Choi, Kyung Won Kang, Kook Yeon Kwak, Young Jin Hong
  • Patent number: 8483329
    Abstract: To quickly and robustly detect the presence of an incumbent user and rapidly relinquish the spectrum to the incumbent user when necessary, carrier recovery is performed in a receiver of the secondary user's cognitive or software radio prior to performing correlation detection with an upsampled reference signal to correct for large frequency offsets and improve the performance of the correlation detector. To detect a received signal, a pilot value is added to a reference signal. The reference signal is upsampled to a sampling frequency of the received signal. The upsampled reference signal is correlated with a demodulated baseband signal to produce a correlation value. It is then determined whether the received signal is present if the correlation value is greater than a predetermined detection threshold value.
    Type: Grant
    Filed: March 6, 2008
    Date of Patent: July 9, 2013
    Assignee: Koninklijke Philips N.V.
    Inventor: Monisha Ghosh
  • Patent number: 8472544
    Abstract: A digital television (DTV) transmitter and a method of coding data in the DTV transmitter method are disclosed. A pre-processes enhanced data by coding the enhanced data for forward error correction (FEC) and expanding the FEC-coded enhanced data. A data formatter generates enhanced data packets including the pre-processed enhanced data and inserting known data to at least one of the enhanced data packets. A first multiplexer multiplexes main data packets with the enhanced data packets, and a data randomizer randomizes the multiplexed data packets. A Reed-Solomon (RS) encoder RS-codes the randomized data packets by adding first parity data, and a data interleaver interleaves the RS-coded data packets. A trellis encoder trellis-encodes the interleaved data packets, wherein the trellis encoder may be initialized when a known data sequence is inputted thereto.
    Type: Grant
    Filed: August 20, 2010
    Date of Patent: June 25, 2013
    Assignee: LG Electronics Inc.
    Inventors: In Hwan Choi, Kyung Won Kang, Kook Yeon Kwak, Young Jin Hong, Sung Ryong Hong
  • Patent number: 8458752
    Abstract: A method for receiving a broadcasting signal and a broadcasting signal receiver are disclosed. Even when a cell is changed while an emergency alert is output, the emergency alert can be continuously output using emergency alert table information included in the broadcasting signal and channel information of the cell. The emergency alert table information may include a cell identifier and the channel information of the cell may include virtual channel information of the cell.
    Type: Grant
    Filed: May 10, 2011
    Date of Patent: June 4, 2013
    Assignee: LG Electronics Inc.
    Inventors: Chang Sik Yun, In Hwan Choi, Kook Yeon Kwak, Hyoung Gon Lee, Won Gyu Song, Jin Pil Kim, Jong Moon Kim, Jin Woo Kim, Byoung Gill Kim
  • Patent number: 8442105
    Abstract: In an embodiment of an equalizer, a demodulator for MMSE-SIC receives a symbol vector to provide first information. A decoder receives the first information to provide second information to the demodulator. The decoder iteratively processes the first information to provide the second information. The demodulator and decoder are coupled in a loop for feeding back the second information for iteratively refining the first information. A detection-cancellation block of the demodulator receives the symbol vector to provide an equalized vector. A channel pre-processor block of the demodulator receives an initial vector output of the detection-cancellation block for the symbol vector for a demodulating-decoding iterative sequence to provide a weight vector. The channel pre-processor block provides an approximation using a fixed matrix to generate the weight vector. The detection-cancellation block receives the weight vector for equalization of the symbol vector in order to provide the equalized vector.
    Type: Grant
    Filed: November 2, 2011
    Date of Patent: May 14, 2013
    Assignee: Xilinx, Inc.
    Inventors: Christopher H. Dick, Raghavendar M. Rao
  • Patent number: 8437372
    Abstract: A digital broadcast transmitting/receiving system and a method for processing data are disclosed. The method for processing data may enhance the receiving performance of the receiving system by performing additional coding and multiplexing processes on the traffic information data and transmitting the processed data. Thus, robustness is provided to the traffic information data, thereby enabling the data to respond strongly against the channel environment which is always under constant and vast change.
    Type: Grant
    Filed: September 21, 2011
    Date of Patent: May 7, 2013
    Assignee: LG Electronics Inc.
    Inventors: Jin Pil Kim, Young In Kim, Ho Taek Hong, In Hwan Choi, Kook Yeon Kwak, Hyoung Gon Lee, Byoung Gill Kim, Jin Woo Kim, Jong Moon Kim, Won Gyu Song
  • Patent number: 8411761
    Abstract: When a change in sub-channel selection is made after a mobile/handheld (M/H) Frame is begun, an M/H receiver is for some time unable to correct byte errors by transverse Reed-Solomon (TRS) decoding of turbo decoding results. Despite this, later stages of the M/H receiver are supplied data that cyclic-redundancy-check (CRC) decoding of Internet protocol (IP) packets does not find to be in error. Some of the IP packets comprise Service Map Table (SMT)-mobile/handheld (MH) data used to update SMT determining how the M/H receiver is operated. SMT-MH data that have not been subjected to TRS byte-error correction are kept from updating the SMT until those SMT-MH data are verified by later SMT-MH data subjected to TRS byte-error correction. Transmitting total number of Groups (TNOG) information for the currently received M/H Frame in all its sub-frames speeds up acquisition of Fast Information Channel updates by the M/H receiver.
    Type: Grant
    Filed: September 8, 2009
    Date of Patent: April 2, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Allen LeRoy Limberg
  • Patent number: 8385250
    Abstract: A digital broadcasting system and a data processing method are disclosed. In an aspect of the present invention, the present invention provides a data processing method including receiving a broadcast signal in which main service data and mobile service data are multiplexed, demodulating the received broadcast signal, outputting demodulation time information of a specific position of a broadcast signal frame, and acquiring reference time information contained in the mobile service data frame, setting the reference time information to a system time clock at a specific time based on the demodulation time information and decoding the mobile service data according to the system time clock.
    Type: Grant
    Filed: June 21, 2010
    Date of Patent: February 26, 2013
    Assignee: LG Electronics Inc.
    Inventors: Chul Soo Lee, In Hwan Choi, Jae Hyung Song, Seung Jong Choi
  • Patent number: 8351416
    Abstract: The present invention relates to a re-generating method and module for an ATSC-MH broadcasting signal, an ATSC-MH broadcast receiver, and a storage medium. The ATSC-MH broadcast receiver includes: a main stream data generating module for receiving an ATSC-MH RF signal, and outputting main stream data including MHE packets; an ATSC-MH broadcasting signal re-generating module for extracting the MHE packets from the main stream data generated by the main stream data generating module, thereby re-configuring data of MPH Group format after data interleaver; and a mobile stream generating module for outputting the mobile stream data from the interleaved MPH group format data re-configured by the ATSC-MH broadcasting signal re-generating module.
    Type: Grant
    Filed: July 8, 2009
    Date of Patent: January 8, 2013
    Assignee: DTV Interactive Co., Ltd.
    Inventors: Jung-Keun Oh, Suk-Jin Hong
  • Patent number: 8301985
    Abstract: A DTV transmitter includes a pre-processor pre-processing enhanced data, a data formatter generating enhanced data packets including the pre-processed enhanced data, and a multiplexer multiplexing the enhanced data packets with main data packets. The transmitter further includes an RS encoder RS-coding the multiplexed packets by adding systematic RS parity data to each main data packet and by adding non-systematic RS parity place holders to each enhanced data packet, and a data interleaver interleaving the RS-coded packets. The non-systematic RS parity place holders are placed after the enhanced data within each interleaved enhanced data packet, and a sequence of known data place holders is periodically included in the interleaved enhanced data packets.
    Type: Grant
    Filed: December 15, 2010
    Date of Patent: October 30, 2012
    Assignee: LG Electronics Inc.
    Inventors: In Hwan Choi, Kyung Won Kang, Kook Yeon Kwak
  • Patent number: 8300569
    Abstract: A method of processing broadcast data in a broadcast transmitter includes performing, by a Reed-Solomon (RS) encoder, RS encoding and Cyclic Redundancy Check (CRC) encoding on mobile service data and building at least primary RS frames belonging to a primary ensemble or secondary RS frames belonging to a secondary ensemble depending on RS frame mode information that indicates a single frame mode or a dual frame mode; mapping each of the built at least primary or secondary RS frames into groups, wherein each of the groups includes known data sequences, a fast information channel (FIC) segment, and transmission parameter channel (TPC) data; and transmitting a transmission frame containing the groups.
    Type: Grant
    Filed: February 27, 2012
    Date of Patent: October 30, 2012
    Assignee: LG Electronics Inc.
    Inventors: Jae Hyung Song, In Hwan Choi, Jong Yeul Suh, Jin Pil Kim, Chul Soo Lee
  • Patent number: 8254706
    Abstract: An E8-VSB reception system, apparatus for generating data attribute and method thereof, and apparatus for channel encoding and method thereof are disclosed. In the present invention, E8-VSB data resulting from multiplexing a plurality of enhanced data encoded at different coding rates with main data is received. And, the main data and a plurality of the enhanced data are identified to be modulated from the received E8-VSB data. In particular, by generating M/E packet attribute information, enhanced packet attribute information, enhanced byte attribute information and E8-VSB symbol attribute information from the E8-VSB data attribute generating apparatus, the channel decoding apparatus can correctly identify to decode the main data, ½ enhanced data and ¼ enhanced data from one another.
    Type: Grant
    Filed: June 16, 2011
    Date of Patent: August 28, 2012
    Assignee: LG Electronics Inc.
    Inventors: In Hwan Choi, Kyung Won Kang
  • Patent number: 8208501
    Abstract: A digital broadcast transmitting/receiving system and a method for processing data are disclosed. The method for processing data may enhance the receiving performance of the receiving system by performing additional coding and multiplexing processes on the traffic information data and transmitting the processed data. Thus, robustness is provided to the traffic information data, thereby enabling the data to respond strongly against the channel environment which is always under constant and vast change.
    Type: Grant
    Filed: August 17, 2011
    Date of Patent: June 26, 2012
    Assignee: LG Electronics Inc.
    Inventors: Jin Pil Kim, Young In Kim, Ho Taek Hong, In Hwan Choi, Kook Yeon Kwak, Hyoung Gon Lee, Byoung Gill Kim, Jin Woo Kim, Jong Moon Kim, Won Gyu Song
  • Patent number: 8199839
    Abstract: A digital broadcast transmitting/receiving system and a signal processing method thereof that can improve the receiving performance of the system. A digital broadcast transmitter has a randomizer to randomize an input data stream which has null bytes being inserted at a specified position, a multiplexer to output a data stream formed by inserting specified known data into the position of the null bytes of the randomized data stream, an encoder to encode the data stream outputted from the multiplexer, and a modulator/RF-converter to modulate the encoded data, RF-convert the modulated data and transmit the RF-converted data. The receiving performance of the digital broadcast transmitting/receiving system can be improved even in a multi-path channel by detecting the known data from the received signal and using the known data in synchronization and equalization in a digital broadcast receiver.
    Type: Grant
    Filed: October 1, 2009
    Date of Patent: June 12, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hae-joo Jeong, Yong-deok Chang
  • Patent number: 8175193
    Abstract: An apparatus for recovering carrier wave in digital broadcasting receiver and a method therefore are disclosed which are capable of easily detecting and correcting frequency offsets of carrier wave without recourse to a pilot signal in a digital broadcasting receiver receiving a broadcasting signal of vestigial sideband (VSB) modulation system, thereby recovering the carrier wave, wherein, to this end, a complex sine wave whose central frequency is 1/n the symbol frequency is multiplied to generate a real component and imaginary Offset Quadrature Amplitude Modulation (OQAM) signals to calculate a phase error value from the real and imaginary component OQAM signals, to generate a complex sine wave compensating the calculated phase error value, to multiply the complex sine wave by the complex signal outputted from the phase splitter and to convert the complex signal to a baseband signal whose frequency offset is corrected.
    Type: Grant
    Filed: March 28, 2008
    Date of Patent: May 8, 2012
    Assignee: LG Electronics Inc.
    Inventor: Jae Hyung Kim
  • Patent number: 8170125
    Abstract: A method for modulating a sequence of data symbols such that the transmit signal exhibits spectral redundancy. Null symbols are inserted in the sequence of data symbols such that a specified pattern of K data symbols and N?K null symbols is formed in every period of N symbols in the modulated sequence, N and K being positive integers and K being smaller than N.
    Type: Grant
    Filed: March 31, 2010
    Date of Patent: May 1, 2012
    Assignee: Broadcom Corporation
    Inventor: Gottfried Ungerboeck
  • Patent number: 8160173
    Abstract: At the transmitter side, carrier waves are modulated according to an input signal for producing relevant signal points in a signal space diagram. The input signal is divided into, two, first and second, data streams. The signal points are divided into signal point groups to which data of the first data stream are assigned. Also, data of the second data stream are assigned to the signal points of each signal point group. At the receiver side, the first and/or second data streams can be reconstructed from a received signal. Furthermore, a communication system based on an OFDM system is utilized for data transmission of a plurality of subchannels, wherein the subchannels are differentiated by changing the length of a guard time slot or a carrier wave interval of a symbol transmission time slot, or changing the transmission electric power of the carrier.
    Type: Grant
    Filed: April 29, 2009
    Date of Patent: April 17, 2012
    Assignee: Panasonic Corporation
    Inventor: Mitsuaki Oshima
  • Patent number: 8149951
    Abstract: A digital broadcast system including a broadcast receiving system and data processing method are disclosed. In the broadcast receiving system receiving broadcast signals, the broadcast receiving system includes a transmission parameter decoding unit, a known sequence detector, and a burst controller. The transmission parameter decoding unit detects information on a burst of a received signal from broadcast data having main service data and mobile service data multiplexed therein within a field of the received signal and outputs the detected information on the burst. The known sequence detector receives burst information from the transmission parameter decoding unit and uses the received burst information and known data position information included in the received data, so as to output burst control information. The burst controller uses the burst control information to control power supply of the broadcast receiving system.
    Type: Grant
    Filed: December 28, 2010
    Date of Patent: April 3, 2012
    Assignee: LG Electronics Inc.
    Inventors: Jong Moon Kim, In Hwan Choi, Kook Yeon Kwak, Byoung Gill Kim, Won Gyu Song, Jin Woo Kim, Hyoung Gon Lee
  • Patent number: 8130833
    Abstract: A VSB communication system or transmitter for processing supplemental data packets with MPEG-II data packets includes a VSB supplemental data processor and a VSB transmission system. The VSB supplemental data processor includes a Reed-Solomon coder for coding the supplemental data to be transmitted, a null sequence inserter for inserting a null sequence to an interleaved supplemental data for generating a predefined sequence, a header inserter for inserting an MPEG header to the supplemental data having the null sequence inserted therein, a multiplexer for multiplexing an MPEG data coded with the supplemental data having the MPEG header added thereto in a preset multiplexing ratio and units. The output of the multiplexer is provided to an 8T-VSB transmission system for modulating a data field from the multiplexer and transmitting the modulated data field to a VSB reception system.
    Type: Grant
    Filed: September 9, 2009
    Date of Patent: March 6, 2012
    Assignee: LG Electronics Inc.
    Inventors: In Hwan Choi, Young Mo Gu, Kyung Won Kang, Kook Yeon Kwak
  • Patent number: 8130873
    Abstract: A carrier recovery apparatus usable with a VSB receiver and a method thereof. The carrier recovery apparatus is capable of recovering a carrier even though a pilot signal may be corrupted due to multi-path characteristics of a channel. Accordingly, the carrier recovery apparatus performs a BECM (Band Edge Component Maximization) algorithm on upper and lower sidebands of a received signal to generate phase information therefrom. The phase information is combined in a combiner. Since the BECM algorithm is performed on the upper and lower sidebands, it is possible to execute the carrier recovery even through the upper sideband of a received signal may be corrupted. Therefore, the carrier recovery apparatus can prevent performance degradation of the VSB receiver caused by corruption in the pilot signal.
    Type: Grant
    Filed: August 9, 2005
    Date of Patent: March 6, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Dong-hoon Lee
  • Patent number: 8121213
    Abstract: A modulation apparatus is disclosed that enables significant improvements in signal transmission rate in a limited frequency band as compared with conventional modulation schemes. The modulation apparatus has first and second frequency-increasing single side band (SSB) modulators. The modulators are configured to have respective carrier frequencies with a difference by a frequency corresponding to the symbol frequency (i.e. fundamental frequency of the input symbol). An adder combines a lower side band (LSB) signal obtained from the SSB modulator set for a higher carrier frequency, and an upper side band (USB) signal obtained from the SSB modulator set for a lower carrier frequency to obtain a modulation signal.
    Type: Grant
    Filed: July 26, 2004
    Date of Patent: February 21, 2012
    Assignee: Panasonic Corporation
    Inventors: Genichiro Ota, Daichi Imamura, Keiji Takakusaki, Mitsuru Uesugi
  • Patent number: 8116276
    Abstract: A digital broadcast receiving system and a method for controlling the same are disclosed. The method a method for controlling a digital broadcast receiving system includes the steps of receiving a broadcast signal having mobile service data and main service data multiplexed therein, extracting transmission parameter channel (TPC) signaling information and fast information channel (FIC) signaling information from a data group within the received mobile service data, acquiring a program table, by using the IP signaling channel within an ensemble included in the received broadcast signal, and controlling the system to create a list of channels mapped with all ensembles transmitted through at least one physical frequency, by using the acquired program table.
    Type: Grant
    Filed: January 14, 2011
    Date of Patent: February 14, 2012
    Assignee: LG Electronics Inc.
    Inventors: Sang Hyup Lee, In Hwan Choi, Jeong Woo Kim, Chul Soo Lee, Jae Hyung Song
  • Patent number: 8116400
    Abstract: Implementation of Fast Information Channel (FIC) signaling when Chunks of FIC information span more than one sub-Frame of an M/H Frame is described. FIC signaling is advanced further at the digital television (DTV) transmitters than originally proposed, thereby eliminating need for substantial amounts of delay memory for coded M/H data in receivers for such data. Each FIC-Chunk includes a bit indicating when it is not applicable only to M/H Frames yet to be received but is also applicable to an M/H Frame being currently received. This facilitates reception being more quickly established after a change in DTV channel selection. Transmission Parameter Channel (TPC) signaling pertaining to the M/H Frame being currently received continues to the conclusion of the M/H Frame, so the total number of M/H Groups in each M/H sub-Frame is signaled to facilitate de-interleaving of the FIC signaling. Code combining of FIC Chunks is described.
    Type: Grant
    Filed: December 9, 2009
    Date of Patent: February 14, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Allen LeRoy Limberg
  • Patent number: 8098694
    Abstract: A digital broadcast transmitting/receiving system and a method for processing data are disclosed. The method for processing data may enhance the receiving performance of the receiving system by performing additional coding and multiplexing processes on the traffic information data and transmitting the processed data. Thus, robustness is provided to the traffic information data, thereby enabling the data to respond strongly against the channel environment which is always under constant and vast change.
    Type: Grant
    Filed: May 24, 2010
    Date of Patent: January 17, 2012
    Assignee: LG Electronics Inc.
    Inventors: Jin Pil Kim, Young In Kim, Ho Taek Hong, In Hwan Choi, Kook Yeon Kwak, Hyoung Gon Lee, Byoung Gill Kim, Jin Woo Kim, Jong Moon Kim, Won Gyu Song
  • Patent number: 8094727
    Abstract: A DTV transmitter includes an encapsulation unit which encapsulates enhanced data having an internet protocol (IP) format into a plurality of addressable sections. The encapsulation unit inserts burst time information into each addressable section. The DTV transmitter further includes a first multiplexer multiplexing the encapsulated enhanced data with program and system information, a pre-processor pre-processing the multiplexed enhanced data, a data formatter generating enhanced data packets including the pre-processed data and inserting the known data into the enhanced data packets, and a second multiplexer generating one or more bursts of data by multiplexing the enhanced data packets.
    Type: Grant
    Filed: January 16, 2007
    Date of Patent: January 10, 2012
    Assignee: LG Electronics Inc.
    Inventors: Sung Ryong Hong, In Hwan Choi, Kyung Won Kang, Kook Yeon Kwak, Young Jin Hong