Carrier And Sidebands Separately Transmitted Patents (Class 455/104)
  • Patent number: 10805787
    Abstract: A technique of determining a location of a small cell access point in a wireless communication network is discussed herein. The small cell access point communicates with a nearby mobile device using an unlicensed radio frequency (RF) band radio, of the small cell access point. The small cell access point receives, from the mobile device over the unlicensed RF band, location information related to a location of the mobile device. The small cell access point provides the location information to a gateway within the wireless communication network. Based at least in part on the location information, the gateway may register the small cell access point for service within the wireless communication network and a licensed RF band radio of the small cell access point is activated.
    Type: Grant
    Filed: January 8, 2019
    Date of Patent: October 13, 2020
    Assignee: T-Mobile USA, Inc.
    Inventors: Dragos Dumitru Lazar, Aram Falsafi
  • Patent number: 9819559
    Abstract: Systems and methods that receive at information technology (IT) management system data from at least two IT management systems, wherein the data identifies resource coverage known to each respective IT management system are discussed. The system or method may generate an IT management system coverage map as a function of the IT management system data using the coverage map generator, wherein the coverage map indicates if there is a gap in IT resource coverage of the at least two IT management systems and whether the IT resource gap creates a possible compliance issue with a policy to be followed by one of the at least two IT management systems, and wherein the IT resource gap is discovered by comparing the IT management system data of the at least two IT management systems.
    Type: Grant
    Filed: March 13, 2015
    Date of Patent: November 14, 2017
    Assignee: CA, INC.
    Inventor: Yaron Holland
  • Patent number: 9008708
    Abstract: The invention relates to a process for detection of a signal in a frequency sub-band of a frequency band of an acquired signal y(t), the process comprising: acquisition of the signal y(t) in a frequency band; frequential analysis of said acquired signal y(t) to obtain at least one frequential signal Y with NFFT frequential components; breakdown into M frequency sub-bands i of size N of the frequential signal Y, the size of each frequency sub-band being a function of the bandwidth of the signal to be detected; determination, in the frequential domain, for each frequency sub-band, of a criterion Ti, i=1, . . . , M as a function of the energy of the signal in the frequency sub-band i and of the coefficient two of the autocorrelation function of the signal in the frequency sub-band i; decision, as a function of the criterion Ti, to determine whether a signal is detected in the sub-band i.
    Type: Grant
    Filed: May 3, 2013
    Date of Patent: April 14, 2015
    Assignee: Commissariat à l'Energie Atomique et aux Energies Alternatives
    Inventors: Matthieu Gautier, Vincent Berg
  • Patent number: 8976732
    Abstract: A control unit, in cooperation with an interface (IF) unit, a modulation unit and a baseband processing unit, produces a packet signal composed of a plurality of streams. While using as a reference a first known signal assigned to one of the plurality of streams and performing a cyclic timing shift within the first known signal on a first known signal assigned to another stream, the control unit performs a timing shift also on an extensional known signal assigned to a stream where no data is assigned. The amounts of timing shift are given degrees of priority beforehand and for the stream where data signals are assigned the control unit uses the amounts of timing shift in descending degree of priority. For the stream where no data signal is assigned, the control unit uses the amounts of timing shift also in descending degree of priority.
    Type: Grant
    Filed: January 18, 2013
    Date of Patent: March 10, 2015
    Assignee: Hera Wireless S.A.
    Inventor: Seigo Nakao
  • Patent number: 8958760
    Abstract: Electronic devices may have multiple wireless integrated circuits such as a pair of baseband processor integrated circuits and may have multiple antennas such as a pair of antennas. An electronic device may be operated in different modes depending on the operating environment of the electronic device. When both antennas are unblocked, both baseband processors and both antennas may be used in transmitting signals. When one antenna is not available, the device may be operated in a mode in which the available antenna is used and both baseband processors are used or in a mode in which the available antenna is used and only one of the baseband processors is used. Operating mode decisions may be made so as to minimize the potential for intermodulation distortion and absorbed radiation.
    Type: Grant
    Filed: January 9, 2012
    Date of Patent: February 17, 2015
    Assignee: Apple Inc.
    Inventors: Syed A. Mujtaba, Weiping Dou
  • Patent number: 8885740
    Abstract: A first preamble for a first data unit includes a first long training field and a first signal field modulated according to a first technique. The first data unit is generated according to a first data unit format and includes the first preamble. A second preamble, generated for a second data unit, includes a second signal field and a second long training field. Information in the second signal field is repeated and/or the second long training field is generated so that a duration of the second long training field is longer than a duration of the first long training field. A portion of the second signal field is modulated according to a second technique or a portion of the second long training field is modulated according to the second technique to signal to a receiver that the second data unit is formatted according to a second data unit format.
    Type: Grant
    Filed: February 3, 2012
    Date of Patent: November 11, 2014
    Assignee: Marvell World Trade Ltd.
    Inventors: Hongyuan Zhang, Rohit U. Nabar, Raja Banerjea, Yong Liu, Sudhir Srinivasa, Hyukjoon Kwon
  • Patent number: 8676138
    Abstract: A method of handling system information reception for a mobile device capable of receiving and transmitting on a plurality of component carriers in a wireless communication system is disclosed. The method comprises receiving system information of a secondary component carrier of the plurality of component carriers via a first dedicated signaling, and maintaining the system information of the secondary component carrier valid until an update of the system information of the secondary component carrier is received via a second dedicated signaling.
    Type: Grant
    Filed: April 18, 2011
    Date of Patent: March 18, 2014
    Assignee: HTC Corporation
    Inventor: Chih-Hsiang Wu
  • Patent number: 8634432
    Abstract: A base station for use in an OFDM network capable of communicating with a plurality of subscriber stations in a coverage area of the OFDM network. The base station transmits to a first subscriber station in a first subband of subcarriers from a first transmit antenna and transmits to the first subscriber station in a second subband of subcarriers from a second transmit antenna. The first and second subbands comprise different subcarriers. The base station also transmits to a second subscriber station in the first subband of subcarriers from the second transmit antenna and transmits to the second subscriber station in the second subband of subcarriers from the first transmit antenna.
    Type: Grant
    Filed: March 27, 2006
    Date of Patent: January 21, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Farooq Khan, Cornelius van Rensburg, Jiann-An Tsai
  • Patent number: 8599755
    Abstract: A network device for implementing high-rate greenfield transmission in a mixed mode frame structure. The network device is configured to transmit a mixed mode frame on two adjacent channels. The mixed mode frame comprises at least two backward compatible portions of a first frequency and a greenfield portion of a second frequency.
    Type: Grant
    Filed: March 22, 2011
    Date of Patent: December 3, 2013
    Assignee: Broadcom Corporation
    Inventor: Jason Alexander Trachewsky
  • Patent number: 8498346
    Abstract: Multicarrier receivers and methods for carrier frequency offset correction and channel estimation for receipt of simultaneous transmissions over a multi-user uplink are generally described herein. Other embodiments may be described and claimed.
    Type: Grant
    Filed: October 14, 2008
    Date of Patent: July 30, 2013
    Assignee: Intel Corporation
    Inventors: Ashim Biswas, Lakshmipathi Sondur, Anees A. Sahib, Sean Lawrence
  • Patent number: 8472335
    Abstract: Method and RNC for selecting transmission technology when a UE enters the network, which checks whether the UE is MIMO and, if so and only one carrier is available, allocates its traffic to said carrier and uses a S-CPICH to provide all MIMO traffic with a diversity pilot and Virtual Antenna Mapping for balance. If more than one carrier is available, the number of UEs, their radio conditions and load of carriers are checked periodically. If the carrier is busy only with MIMO and its load is higher than the load of the remaining carriers, diversity CPICH of STTD is selected; otherwise and only if the UEs vulnerable to STTD with good radio conditions exceed a certain number, the S-CPICH is selected. The RNC can reconfigure the network from transmitting MIMO traffic with STTD to using MIMO with S-CPICH or vice versa dynamically by periodical check of the load and UEs criteria for configuration change.
    Type: Grant
    Filed: July 14, 2010
    Date of Patent: June 25, 2013
    Assignee: Vodafone Group PLC
    Inventors: Andrea De Pasquale, Kyriakos Exadaktylos, Esperanza Alcazar Viguera, Maria Diaz Mateos, Beatriz Garriga Muñiz, Francisco Javier Dominguez Romero, Brendan McWilliams, Julio Urbano Ruiz, Clara Serrano Solsona, Javier López Roman, Aitor García Viñas, Santiago Tenorio Sanz, Yannick Le Pezennec
  • Patent number: 8412125
    Abstract: An apparatus for enabling a base station to transmit radio frequency signals with a transmit diversity technique comprises a first antenna implemented in the base station; and a second antenna implemented in the base station, and placed apart from the first antenna by a predetermined distance. The first antenna utilizes a first frequency band of a predetermined frequency spectrum for transmitting signals, and the second antenna utilizes a second frequency band of the predetermined frequency spectrum for transmitting signals. The first and second frequency bands do not overlap.
    Type: Grant
    Filed: October 3, 2007
    Date of Patent: April 2, 2013
    Assignee: Cisco Technology, Inc.
    Inventor: Richard L. Smith
  • Patent number: 8379738
    Abstract: A method includes separating resource elements from multiple code blocks into different groups, and decoding the code bits of the resource elements within each group without waiting for a completed reception of a transport block to start decoding. A method includes separating coded bits from multiple code blocks into different groups, and decoding the code blocks containing coded bits within each group. A first CRC is attached to the transport block and a second CRC is attached to at least one code block from the transport block. An improved channel interleaver design method including mapping from coded bits of different code blocks to modulation symbols, and mapping from modulation symbols to time, frequency, and spatial resources, to make sure each code block to get roughly the same level of protection.
    Type: Grant
    Filed: February 28, 2008
    Date of Patent: February 19, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Zhouyue Pi, Farooq Khan
  • Patent number: 8331928
    Abstract: A wireless radio frequency transmitter (400), upon detecting (101) an end user assertion of an end user interface and in automatic response thereto, uses a first rolling carrier frequency to transmit (102) a message. Upon then determining (104) that the end user is continuing to assert this end user interface, this transmitter then re-transmits (105) that message using a predetermined fixed carrier frequency. By one approach, the first rolling carrier frequency is selected from amongst a pool of candidate carrier frequencies using a carrier frequency calculation formula. By another approach, this carrier frequency is selected from one or more tables that comprise a plurality of different carrier frequencies.
    Type: Grant
    Filed: October 7, 2008
    Date of Patent: December 11, 2012
    Assignee: The Chamberlain Group, Inc.
    Inventors: John Steven Scaletta, Edward J. Lukas, Robert R. Keller, Jr.
  • Patent number: 8331871
    Abstract: A method of generating and transmitting a channel quality indicator is disclosed, by which a feedback size of channel quality information is reduced. The present invention includes selecting at least one subband by considering a channel quality of each of entire subbands formed by grouping a predetermined number of subcarriers, additionally selecting subbands adjacent to the at least one subband selected in the first selection step, and generating the channel quality indicator corresponding to the subbands selected in the first selection step and the second selection step.
    Type: Grant
    Filed: August 14, 2008
    Date of Patent: December 11, 2012
    Assignee: LG Electronics Inc.
    Inventors: Dong Wook Roh, Bong Hoe Kim, Joon Kui Ahn, Yu Jin Noh, Dong Youn Seo, Ki Jun Kim
  • Patent number: 8280320
    Abstract: An apparatus and a method for simultaneously supporting Multiple-Input Multiple-Output (MIMO) and beamforming in a wireless communication system are provided. In the method, two data streams are mapped to each of all of 2N transmission antennas; the two data streams are multiplied by different Cyclic Delay Diversity (CDD) phase sequences; the two data streams multiplied by the different CDD phase sequences for each transmission antenna are added; and the added data stream is multiplied by a beamforming coefficient and transmitted for each transmission antenna.
    Type: Grant
    Filed: February 19, 2010
    Date of Patent: October 2, 2012
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Ki-Hwan Hwang, Myung-Kwang Byun, Sung-Kwon Jo
  • Patent number: 8265572
    Abstract: An active antenna array comprises a plurality of transmission paths, a plurality of variable power supply units, and an envelope detection system. The transmission paths are adapted to carry a plurality of similar transmission path signals, and the plurality of transmission paths comprises an amplifier having a power input and a signal input for one of the plurality of similar transmission path signals. The plurality of variable power supply units is connected to the power input of the amplifier for supplying power to the amplifiers. Each of the plurality of variable power supply units comprises an envelope signal input. The envelope detection system is connected to the envelope inputs of the plurality of variable power supply units and adapted to provide a common envelope signal for the plurality of similar transmission path signals to the plurality of variable power supply units. A method for envelope tracking and computer program products for manufacture and method execution are also claimed.
    Type: Grant
    Filed: December 21, 2009
    Date of Patent: September 11, 2012
    Assignee: Ubidyne, Inc.
    Inventor: Peter Kenington
  • Patent number: 8249527
    Abstract: A radio receiver includes a first receiver module for converting a first radio frequency (RF) signal at a first carrier frequency into a first baseband signal. A second receiver module converts a second RF signal at a second carrier frequency into a second baseband signal. A recombination module combines the first baseband signal and the second baseband signal into an output signal.
    Type: Grant
    Filed: February 9, 2006
    Date of Patent: August 21, 2012
    Assignee: VIXS Systems, Inc.
    Inventor: Mathew A. Rybicki
  • Patent number: 8238845
    Abstract: A digital-to-analog conversion circuit operates by selectively discharging members of a plurality of capacitors. Charging of the capacitors occurs during a reset period while digital-to-analog conversion occurs as the capacitors are discharged. Those capacitors that are discharged are selected from the plurality of capacitors based on a digital input. The analog output includes the charge discharged from the capacitors. The capacitors are optionally divided into separate capacitor banks.
    Type: Grant
    Filed: September 22, 2009
    Date of Patent: August 7, 2012
    Assignee: Broadcom Europe Limited
    Inventors: Jonathan Ephraim David Hurwitz, Steven Collins
  • Patent number: 8213881
    Abstract: A signal processing system is disclosed. The system includes: a first synthesizer and a second synthesizer, for respectively generating a first frequency and a second frequency; a first RF circuit; a first analog front end (AFE); a second RF circuit; and a second AFE, wherein the first RF circuit and the first AFE can support a signal transmission of a first bandwidth, the second RF circuit and the second AFE can support a signal transmission of a second bandwidth, a central frequency of the first bandwidth is substantially equal to the first frequency, and a central frequency of the second bandwidth is substantially equal to the second frequency.
    Type: Grant
    Filed: November 21, 2007
    Date of Patent: July 3, 2012
    Assignee: Realtek Semiconductor Corp.
    Inventors: Kuang-Yu Yen, Chung-Yao Chang
  • Patent number: 8170504
    Abstract: A programmable transmitter generates a frame preamble to train a receiver with respect to a communication link format that corresponds to a transmission mode wherein the transmission mode may comprise transmitting the communication link over one or more antennas. Generally, the invention includes generating a preamble with an arrangement that depends upon whether a Greenfield (high data rate) or mixed mode transmission is to occur and that depends upon a number of spatial streams that are to be generated. One format for high data rate transmission includes a short training sequence, a long training sequence and a signal field. The mixed mode transmission further includes a legacy prefix.
    Type: Grant
    Filed: May 26, 2011
    Date of Patent: May 1, 2012
    Assignee: Broadcom Corporation
    Inventors: Jason A. Trachewsky, Rajendra Tushar Moorti, Christopher J. Hansen
  • Patent number: 8081934
    Abstract: A communication device for use in adapting an appliance to a computer network consistent with certain embodiments has a data transmitter that receives data to be transmitted and generates output signals carrying the data at a plurality of carrier frequencies. A user configurable notch filter, receives the output signals from the data transmitter, for reducing the amplitude of a user selected range of frequencies, and producing a filtered output. A network communication medium interface receives the filtered output and transmitting the filtered output over a network communication medium. This abstract is not to be considered limiting, since other embodiments may deviate from the features described in this abstract.
    Type: Grant
    Filed: February 18, 2011
    Date of Patent: December 20, 2011
    Assignees: Sony Corporation, Sony Electronics Inc.
    Inventor: Ryuichi Iwamura
  • Patent number: 7986923
    Abstract: A system and method for signal channel balancing through accurate estimation of signal amplitude and phase parameters are described. The system includes multiple analog-to-digital (A/D) converter devices coupled to a digital signal processing (DSP) unit, each A/D converter device corresponding to a communication channel within the system. The system further includes multiple analog multiplexers, each analog multiplexer being coupled to a corresponding A/D converter device and having a number of inputs equal to the number of communication channels to be balanced within the system. The system further includes a timing generator circuit and selection logic coupled to the DSP unit, such that for each clock cycle, a single analog channel input is routed to each A/D converter device.
    Type: Grant
    Filed: November 20, 2008
    Date of Patent: July 26, 2011
    Inventor: Ion E. Opris
  • Patent number: 7983698
    Abstract: A paging apparatus and method in a mobile communication system providing an MBMS (Multimedia Broadcast Multicast Service). In the mobile communication system, to page a UE for a first service through a primary carrier during a second service in progress through a secondary carrier, a PICH (Paging Indication Channel) transmitter in a Node B transmits paging indication information to the UE through the primary carrier by oscillating the primary carrier as a transmission frequency. A PCH (Paging Channel) transmitter transmits paging information to the UE through the primary carrier or the secondary carrier by oscillating the primary carrier or the secondary carrier as the transmission frequency under a predetermined control. A PBMSCH (Physical Broadcast Multicast Shared Channel) transmitter transmits data of the second service through the secondary carrier by oscillating the secondary carrier as the transmission frequency.
    Type: Grant
    Filed: June 7, 2010
    Date of Patent: July 19, 2011
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Yong-Jun Kwak, Hyeon-Woo Lee, Myeong-Sook Seo, Joon-Goo Park, Sung-Ho Choi, Sung-Hoon Kim
  • Patent number: 7983630
    Abstract: Provided are a digital IF wireless transmitter, an RF modulator, and an RF modulating method.
    Type: Grant
    Filed: September 22, 2008
    Date of Patent: July 19, 2011
    Assignee: Korea Electronics Technology Institute
    Inventors: Hae Moon Seo, Woo Chul Park, Myung Soo Lee, Myung Hyun Yoon
  • Patent number: 7974591
    Abstract: A programmable transmitter generates a frame preamble to train a receiver with respect to a communication link format that corresponds to a transmission mode wherein the transmission mode may comprise transmitting the communication link over one or more antennas. Generally, the invention includes generating a preamble with an arrangement that depends upon whether a Greenfield (high data rate) or mixed mode transmission is to occur and that depends upon a number of spatial streams that are to be generated. One format for high data rate transmission includes a short training sequence, a long training sequence and a signal field. The mixed mode transmission further includes a legacy prefix.
    Type: Grant
    Filed: July 6, 2009
    Date of Patent: July 5, 2011
    Assignee: Broadcom Corporation
    Inventors: Jason A. Trachewsky, Rajendra Tushar Moorti, Christopher J. Hansen
  • Patent number: 7961589
    Abstract: A system and related methods for introducing intra-channel spatial diversity within a multi-carrier wideband communication channel is presented. In accordance with one aspect of the present invention, developed more fully below, a method is presented comprising receiving information for transmission to a receiver, and generating a plurality of sub-carriers to redundantly transmit the information to a user over a multi-carrier wireless communication channel, wherein each of the sub-carriers is dynamically modified by a set of complex weights to ensure that each of the sub-carriers of the wireless communication channel propagates along a different physical path to the receiver.
    Type: Grant
    Filed: September 28, 2001
    Date of Patent: June 14, 2011
    Assignee: Intel Corporation
    Inventor: Athanasios A. Kasapi
  • Patent number: 7957705
    Abstract: A base station (BS) and method to reduce RF interference by a carrier. The BS includes a first power amplifier (PA) that emits a first carrier, a second PA that emits a second carrier, a processor, and data storage containing program instructions. The BS is operable in a first state in which the first PA is on and the second PA is off and a second state in which the first and second PAs are on. Execution of the instructions while the BS operates in the first state cause the processor to determine that the BS receives a mobile station communication and cause the BS to operate in the second state, and while the BS operates in the second state, cause the processor to determine that no mobile stations are registered as being authorized to be served by the BS and cause the BS to operate in the first state.
    Type: Grant
    Filed: March 18, 2008
    Date of Patent: June 7, 2011
    Assignee: Sprint Spectrum L.P.
    Inventor: Daesik Oh
  • Patent number: 7933319
    Abstract: A signal processing system is disclosed. The system includes: a first synthesizer and a second synthesizer, for respectively generating a first frequency and a second frequency; a first RF circuit; a first analog front end (AFE); a second RF circuit; and a second AFE, wherein the first RF circuit and the first AFE can support a signal transmission of a first bandwidth, the second RF circuit and the second AFE can support a signal transmission of a second bandwidth, a central frequency of the first bandwidth is substantially equal to the first frequency, and a central frequency of the second bandwidth is substantially equal to the second frequency.
    Type: Grant
    Filed: November 21, 2007
    Date of Patent: April 26, 2011
    Assignee: Realtek Semiconductor Corp.
    Inventors: Kuang-Yu Yen, Chung-Yao Chang
  • Patent number: 7912024
    Abstract: A network device for implementing high-rate greenfield transmission in a mixed mode frame structure. The network device is configured to transmit a mixed mode frame on two adjacent channels. The mixed mode frame comprises at least two backward compatible portions of a first frequency and a greenfield portion of a second frequency.
    Type: Grant
    Filed: September 3, 2009
    Date of Patent: March 22, 2011
    Assignee: Broadcom Corporation
    Inventor: Jason Alexander Trachewsky
  • Patent number: 7792548
    Abstract: A multiple frequency antenna array includes a first antenna circuit and a second antenna circuit. The first antenna circuit has a first radiation pattern and is tuned to a first carrier frequency. The first antenna circuit transmits a first representation of a radio frequency (RF) signal at the first carrier frequency, where the first carrier frequency corresponds to a carrier frequency of the RF signal and a first frequency offset. The second antenna circuit has a second radiation pattern and is tuned to a second carrier frequency. The second antenna circuit transmits a second representation of the RF signal at the second carrier frequency, where the second carrier frequency corresponds to the carrier frequency of the RF signal and a second frequency offset.
    Type: Grant
    Filed: September 28, 2006
    Date of Patent: September 7, 2010
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Patent number: 7747262
    Abstract: A paging apparatus and method in a mobile communication system providing an MBMS (Multimedia Broadcast Multicast Service). In the mobile communication system, to page a UE for a first service through a primary carrier during a second service in progress through a secondary carrier, a PICH (Paging Indication Channel) transmitter in a Node B transmits paging indication information to the UE through the primary carrier by oscillating the primary carrier as a transmission frequency. A PCH (Paging Channel) transmitter transmits paging information to the UE through the primary carrier or the secondary carrier by oscillating the primary carrier or the secondary carrier as the transmission frequency under a predetermined control. A PBMSCH (Physical Broadcast Multicast Shared Channel) transmitter transmits data of the second service through the secondary carrier by oscillating the secondary carrier as the transmission frequency.
    Type: Grant
    Filed: October 23, 2009
    Date of Patent: June 29, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yong-Jun Kwak, Hyeon-Woo Lee, Myeong-Sook Seo, Joon-Goo Park, Sung-Ho Choi, Sung-Hoon Kim
  • Patent number: 7734303
    Abstract: Systems and methodologies are described that facilitate monitoring transmitter performance in a wireless communication environment. A metric or metrics associated with one or more pilot symbols can be generated and used to evaluate performance. To generate pilot metrics, a signal analyzer can be used to sample the output of a transmitter and the sampled signal can be propagated to a processor. The processor can generate frequency domain channel estimates for subcarriers. Average channel estimates for the subcarriers can be used with the known pilot symbols to determine noise or error for each subcarrier, which can be used to generate the noise variance for each of the pilot symbols. A pilot modulation error metric can be generated based upon the average channel estimates and noise variance.
    Type: Grant
    Filed: May 30, 2006
    Date of Patent: June 8, 2010
    Assignee: QUALCOMM Incorporated
    Inventors: Raghuraman Krishnamoorthi, Thomas Sun
  • Patent number: 7639137
    Abstract: A system for identifying radio-frequency identification (RFID) devices is described. In one embodiment, RFID devices include an antenna and metallic pattern printed on a substrate. A probing platform is used to radiate the RFID devices with an electromagnetic signal (e.g., radio-frequency signal, microwave signal, etc.). Each RFID device generates a quantifiable backscatter depending on the unique impedance of the passive RFID device in response to the electromagnetic signal. The backscatter is employed to uniquely identify the passive RFID device's impendence with respect to the probing platform uniquely characterized at predetermined frequencies of the electromagnetic signal.
    Type: Grant
    Filed: August 28, 2006
    Date of Patent: December 29, 2009
    Inventor: Somnath Mukherjee
  • Patent number: 7630725
    Abstract: A paging apparatus and method in a mobile communication system providing an MBMS (Multimedia Broadcast Multicast Service). In the mobile communication system, to page a UE for a first service through a primary carrier during a second service in progress through a secondary carrier, a PICH (Paging Indication Channel) transmitter in a Node B transmits paging indication information to the UE through the primary carrier by oscillating the primary carrier as a transmission frequency. A PCH (Paging Channel) transmitter transmits paging information to the UE through the primary carrier or the secondary carrier by oscillating the primary carrier or the secondary carrier as the transmission frequency under a predetermined control. A PBMSCH (Physical Broadcast Multicast Shared Channel) transmitter transmits data of the second service through the secondary carrier by oscillating the secondary carrier as the transmission frequency.
    Type: Grant
    Filed: October 21, 2002
    Date of Patent: December 8, 2009
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Yong-Jun Kwak, Hyeon-Woo Lee, Myeong-Sook Seo, Joon-Goo Park, Sung-Ho Choi, Sung-Hoon Kim
  • Patent number: 7570626
    Abstract: A transmission method for transmitting an orthogonal frequency division multiplexing signal the method includes composing, on a per unit time basis, a plurality of carrier groups each composed of one or more subcarriers, assigning, on a per unit time basis, transmission data for a plurality of transmission destination terminals, to the plurality of carrier groups and transmitting the assigned transmission data.
    Type: Grant
    Filed: July 16, 2003
    Date of Patent: August 4, 2009
    Assignee: Panasonic Corporation
    Inventors: Yutaka Murakami, Masayuki Orihashi, Akihiko Matsuoka, Yoichi Nakagawa
  • Patent number: 7558537
    Abstract: A programmable transmitter generates a frame preamble to train a receiver with respect to a communication link format that corresponds to a transmission mode wherein the transmission mode may comprise transmitting the communication link over one or more antennas. Generally, the invention includes generating a preamble with an arrangement that depends upon whether a Greenfield (high data rate) or mixed mode transmission is to occur and that depends upon a number of spatial streams that are to be generated. One format for high data rate transmission includes a short training sequence, a long training sequence and a signal field. The mixed mode transmission further includes a legacy prefix.
    Type: Grant
    Filed: April 11, 2006
    Date of Patent: July 7, 2009
    Assignee: Broadcom Corporation
    Inventors: Jason A. Trachewsky, Rajendra Tushar Moorti, Christopher J. Hansen
  • Patent number: 7512083
    Abstract: A single chip integrated circuit wireless data processor demodulates N separate data signals from M separate antennas simultaneously. The multi-antenna processor can be coupled to a baseband processor on the IC, so that it responds to changing channel conditions between two access points, and selectively kicks in if there is noise, interference, frequency fading, a need for an enhanced data rate, a need for an increased operating range, etc. to improve a performance of the baseband processor.
    Type: Grant
    Filed: April 7, 2004
    Date of Patent: March 31, 2009
    Inventor: Shaolin Li
  • Patent number: 7480493
    Abstract: Spreading code detection methods applying autoregressive spectrum estimation (ARSE) techniques to code division multiple access (CDMA) wireless communication systems allowing the subscriber device to estimate the other users' codes. According to one aspect, ARSE techniques are provided using an augmented Wiener-Hopf solution on a received forward link CDMA signal. The ARSE techniques produce a code spectrum transform yielding a power spectral density versus spreading code index relationship from which the spreading codes in the received forward link signal may be identified. According to another aspect, a reduced rank auto-regression (AR) implementation is provided to produce a code spectrum transform efficiently with improved false code detection rate. With knowledge of other users' spreading codes, interference cancellation can be performed on the forward link of CDMA systems.
    Type: Grant
    Filed: October 29, 2004
    Date of Patent: January 20, 2009
    Assignee: ITT Manufacturing Enterprises, Inc.
    Inventor: Seema Sud
  • Patent number: 7477699
    Abstract: A radio communications device (102) that has multiple receive antennas processes received data communications signals to select between space time coding and spatial multiplexing as a selected transmission technique from a base device (104) that has multiple transmit antennas. A channel throughput (402-412, 450-454) for each transmission technique is estimated based on signal to interference and noise ratios (502-512, 550-554) of signals being transmitted through a MIMO channel (140) as measured by a receiver (708). The transmission technique with the higher estimated throughput is determined. If spatial multiplexing is determined to have the higher estimated throughput and the throughput of each layer of the spatially multiplexed signal is greater than a threshold, spatial multiplexing is selected. Otherwise, space time coding is selected.
    Type: Grant
    Filed: December 20, 2006
    Date of Patent: January 13, 2009
    Assignee: Motorola, Inc.
    Inventors: Fan Wang, Lawrence A. Downing, Amitava Ghosh, Chandrasekar Sankaran, Jun Tan
  • Patent number: 7394754
    Abstract: A system and method for transmitting data in multiple-branch transmitter-diversity OFDM systems is presented. In one embodiment, an approach is taken where an inverse Fourier transform (IFT) is performed on data prior to encoding the data for transmission in the multiple-branch transmitter-diversity system. In another embodiment an IFT is performed on data prior to encoding the data using a space-time block code (STBC) algorithm.
    Type: Grant
    Filed: November 21, 2002
    Date of Patent: July 1, 2008
    Assignee: MediaTek Inc.
    Inventors: Kuo Hui Li, Charles Huang, Mao-Ching Chiu, Hung-Kun Chen, Chao-Ming Chang
  • Patent number: 7366480
    Abstract: In the radio communication device of the present invention, a first carrier transmission modulation wave outputted from a first signal generator 101 is amplified by a first power amplifier 103 and transmitted from a first antenna element 107 through a first duplexer 105. A second carrier transmission modulation wave outputted from a second signal generator 102 is amplified by a second power amplifier 104 and transmitted from a second antenna element 108 through a second duplexer 106. Then, transmission modulation waves with the first and second carriers are subjected to spatial power combining after being transmitted from the two antenna elements 107 and 108 that permit diversity reception. As a result, the radio communication device, which uses two or more carriers (carrier waves), can achieve highly efficient power amplification with a small-sized low-cost circuit means.
    Type: Grant
    Filed: October 14, 2004
    Date of Patent: April 29, 2008
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Yoshihisa Amano
  • Patent number: 7274914
    Abstract: A power correction value generating unit determines a power correction value for minimizing an error, from a reference output power value of a carrier multiplexed signal, generating due to peak power suppression under a carrier setting based on the carrier setting relating to either one or both of the number of carrier signals and frequency arrangement, and peak suppression setting. An output power error correcting unit corrects a signal gain before or after the carrier signals are multiplexed, using the power correction value obtained by the power correction value generating unit. In an apparatus performing peak suppression according to an input limitation power of the power amplifier, it is possible to always obtain a desirable transmission (output) power even when the number of carriers or carrier frequency arrangement varies.
    Type: Grant
    Filed: December 21, 2004
    Date of Patent: September 25, 2007
    Assignee: Fujitsu Limited
    Inventors: Takeshi Ohba, Yasuhito Funyu, Hiroaki Abe, Tomohiro Nakamura
  • Patent number: 7263713
    Abstract: In a television signal transmission system, CS broadcasting signals received via a master antenna are converted into intermediate frequency signals in an LNB (Low Noise Block Down Converter). The CS intermediate frequency signals then undergo conversion of the modulation format, for example, from QPSK into 64-QAM, so that CS broadcasting signals from each transponder, having a bandwidth of, for example, 27 MHz, are accommodated in a narrower bandwidth, for example, 6 MHz, which is equivalent to one channel of terrestrial broadcasting services. Then, the signals accommodated in the narrower bandwidth is frequency-shifted into a vacant frequency band in the VHF band or the UHF band. Accordingly, the CS signals accommodated in the narrower band and frequency-shifted into the vacant band are multiplexed with terrestrial broadcasting signals in the VHF and UHF bands and BS intermediate frequency signals so that all these signals are delivered to each household via a single cable.
    Type: Grant
    Filed: February 26, 2001
    Date of Patent: August 28, 2007
    Assignee: Sony Corporation
    Inventors: Katsumi Oishi, Keiji Fukuzawa, Kenji Inose
  • Patent number: 7181233
    Abstract: An economical, reliable, robust and easy to use multi-user voice communication system and method suitable for use in rapidly evolving tactical or hazardous situations continuously permits each user to hear every voice communication occurring among the other users, no matter when each user speaks, and no matter how many users try to speak at once. One may characterize this as a wearable party-line radio network, because it works like a wireless party-line telephone service in that all users continuously hear every speaker, even when speaking simultaneously. The system is transportable and operable without requiring any set-up procedure or installation of a central hub or router for controlling a varying number of users when moving. Each user carries a transceiver handset with one transmitter and two or more transceivers tuned to the other transmitters in a group.
    Type: Grant
    Filed: December 13, 2005
    Date of Patent: February 20, 2007
    Inventor: Terry L. Fry
  • Patent number: 7177609
    Abstract: A chopper-direct-conversion (CDC) radio receiver includes a phase-alternating mixer receiving an antenna input signal and at least one local oscillator signal and generating a double sideband signal in a single mixing step. The phase-alternating mixer may be implemented by two parallel mixers each mixing the input signal with one of two local oscillator signals and an adder receiving and summing outputs from the two parallel mixers, by a track-and-hold circuit sampling the input signal based upon the local oscillator signal, or by a window averaging circuit averaging the input signal across a period of the local oscillator signal. The CDC architecture is suitable for fabrication on a single chip and offers solutions to virtually all problems found in conventional direct-conversion receivers.
    Type: Grant
    Filed: May 16, 2003
    Date of Patent: February 13, 2007
    Assignee: National Semiconductor Corporation
    Inventor: Hee Wong
  • Patent number: 7162211
    Abstract: Methods and apparatus for scheduling mobile stations (MSs) to download data and/or to control the rate of downloading to an MS from a base station (BS) as a function of downlink channel condition information are described. Artificial channel variations, which can be measured at the MS, and feedback to a BS for scheduling purposes, are introduced through the use of two or more transmitter antennas at a BS. Each of the antennas transmits a signal at the same frequency having the same information content, e.g., modulated data. However the signals are made to differ with time in their phase and/or amplitude to introduce what appear to be channel variations to the MSs.
    Type: Grant
    Filed: December 29, 2003
    Date of Patent: January 9, 2007
    Assignee: QUALCOMM Incorporated
    Inventors: Pramod Viswanath, Rajiv Laroia, David N. C. Tse
  • Patent number: 7113757
    Abstract: A method and apparatus of increasing output power of a plurality of carriers of a wide-band multi-carrier base station system utilizes gain adjusting coefficients to adjust output amplitude of the carriers to satisfy the requirement of the wide-band base station system for different number of carriers and output power. The output power of each of or a part of the carriers is increased when the number of carriers is reduced. Under the premise of not modifying the hardware and satisfying the requirement of protocol specification, the wide-band base station system supports different number of carriers by setting software so that the output power of the respective carriers and the coverage of the base station can be increased when the carriers do not operate in a full configuration.
    Type: Grant
    Filed: March 24, 2003
    Date of Patent: September 26, 2006
    Assignee: Huawei Technologies, Co., Ltd.
    Inventors: Qing Chu, Yuxin Su, Qingquan Peng, Huabing Jiang
  • Patent number: 7027776
    Abstract: A system and method for controlling a transverter from a wireless modem unit (WMU). A WMU delivers a control signal to a transceiver. This signal is outside the IF signal data range (preferably below 11 MHz). The signal is carried on the cable between the transceiver and the WMU. This signal is detected by the transceiver, and determines the timing and the control information. The signal is ASK modulated to enable low data rate transfer of messages between the WMU and the transceiver. The control signal is detected at the transverter using a detector circuit. Additionally, specific transverter detection circuits are disclosed to detect the control signal.
    Type: Grant
    Filed: January 26, 2001
    Date of Patent: April 11, 2006
    Assignee: Vyyo, Inc.
    Inventors: Eric K. Wilson, Hillel Hendler, Raul Asia
  • Patent number: RE44860
    Abstract: A paging apparatus and method in a mobile communication system providing an MBMS (Multimedia Broadcast Multicast Service). In the mobile communication system, to page a UE for a first service through a primary carrier during a second service in progress through a secondary carrier, a PICH (Paging Indication Channel) transmitter in a Node B transmits paging indication information to the UE through the primary carrier by oscillating the primary carrier as a transmission frequency. A PCH (Paging Channel) transmitter transmits paging information to the UE through the primary carrier or the secondary carrier by oscillating the primary carrier or the secondary carrier as the transmission frequency under a predetermined control. A PBMSCH (Physical Broadcast Multicast Shared Channel) transmitter transmits data of the second service through the secondary carrier by oscillating the secondary carrier as the transmission frequency.
    Type: Grant
    Filed: February 20, 2013
    Date of Patent: April 22, 2014
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Yong-Jun Kwak, Hyeon-Woo Lee, Myeong-Sook Seo, Joon-Goo Park, Sung-Ho Choi, Sung-Hoon Kim