Patents Issued in September 13, 2007
-
Publication number: 20070211796Abstract: Provided are a method and apparatus for encoding and decoding multi-view video to provide uniform picture quality at different viewpoints. The multi-view video encoding method includes selecting a set of referenced viewpoint video frames referred to by different viewpoint video frames, from among received multi-view video frames; encoding the multi-view video on the basis of the set of referenced viewpoint video frames; determining whether a condition for changing the set of referenced viewpoint video frames is satisfied; and if the condition is satisfied, changing the set of referenced viewpoint video frames, and encoding the multi-view video on the basis of the changed set of referenced viewpoint video frames. According to the present invention, it is possible to provide multi-view video in which degrees of video quality deterioration at different viewpoints are uniformly distributed with respect to a long time.Type: ApplicationFiled: February 16, 2007Publication date: September 13, 2007Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventor: Myung-ho Kim
-
Publication number: 20070211797Abstract: A method, medium, and system encoding and/or decoding a moving picture. The moving picture encoding method may include selecting a prediction mode that is optimal for the macro blocks, which correspond to each other, of the color components of a current image based on the characteristics of a predetermined image, generating a predicted image for the current image according to the selected prediction mode, and encoding a moving picture using the predicted image. An optimal prediction mode can be adaptively applied to the macro blocks, which correspond to each other, of the color components, thereby increasing the moving picture's encoding and decoding efficiencies.Type: ApplicationFiled: March 13, 2007Publication date: September 13, 2007Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Woo-shik Kim, Hyun-mun Kim, Dae-sung Cho, Dmitri Birinovl, Dae-hee Kim, Woong-il Choi
-
Publication number: 20070211798Abstract: A video decoder, a video decoding method, a video encoder and a video encoding method are disclosed. A video decoder for decoding a video bitstream for an image block includes a motion vector resolution reducer and a motion compensator. The motion vector resolution reducer is for receiving decoded high resolution motion vectors included in the video bitstream and for reducing an accuracy of the high resolution motion vectors to correspond to a low resolution. The motion compensator, in signal communication with the motion vector resolution reducer, is for forming a motion compensated high resolution prediction using the reduced accuracy motion vectors. The video encoder for encoding scalable video comprises a motion compensator for forming a motion compensated full resolution prediction and combining the motion compensated full resolution prediction from an image block to form a prediction residual. The prediction residual is downsampled to form a low resolution downsampled prediction residual and then coded.Type: ApplicationFiled: March 31, 2005Publication date: September 13, 2007Inventors: Jill Boyce, Alexandros Tourapis
-
Publication number: 20070211799Abstract: The reception method is implemented in a receiver apparatus receiving images of a video sequence having undergone losses during an exchange of data with a sender apparatus connected to said receiver apparatus via a communication network. The receiver apparatus comprises at least a first module implementing a transport layer and a second module implementing an application layer, the application layer being subdivided into a first sub-module implementing the decoding of the video and a second sub-module implementing the display of said video. The method comprises the following steps: in the transport layer, transmitting a data loss detection signal intended for the application layer, as soon as the transport layer detects a loss of data; and in the application layer, implementing a loss concealment mechanism, on reception of said loss detection signal and without waiting for said application layer itself to detect said data loss so detected.Type: ApplicationFiled: March 7, 2007Publication date: September 13, 2007Applicant: CANON KABUSHIKI KAISHAInventors: Xavier Henocq, Eric Nassor
-
Publication number: 20070211800Abstract: A method for creating an interpolated video frame using a current video frame, and a plurality of previous video frames is presented. The method includes creating a set of extrapolated motion vectors from at least one reference video frame in the plurality of previous video frames; performing an adaptive motion estimation using the extrapolated motion vectors and a class type of each extrapolated motion vector; deciding on a motion compensated interpolation mode; and, creating a set of motion compensated motion vectors based on the motion compensated interpolation mode decision. An apparatus for performing the method is also disclosed.Type: ApplicationFiled: April 5, 2007Publication date: September 13, 2007Applicant: QUALCOMM INCORPORATEDInventors: Fang Shi, Vijayalakshmi Raveendran
-
Publication number: 20070211801Abstract: A frame rate conversion system includes a transmitter and a receiver. The transmitter includes a decoding unit decoding a compressed video signal encoded by an encoding method using a motion vector, and an encoding unit superimposing reference control information being output from the decoding unit and containing at least a motion vector on a blanking period of the video signal decoded by the decoding unit, and outputs the video signal with the reference control information superimposed thereon. The receiver includes a decoding unit separating the reference control information from the blanking period of the video signal input from the transmitter, and a frame rate converting unit generating an interpolated frame between frames of the input video signal using the reference control information separated by the decoding unit, and converting the input video signal into the signal of a higher frame rate.Type: ApplicationFiled: March 6, 2007Publication date: September 13, 2007Inventor: Kei Matsubayashi
-
Publication number: 20070211802Abstract: A video encoding method comprises storing a plurality of encoded frames of a video in a memory, generating a to-be-encoded frame which is divided in a plurality of regions including at least one encoded region and at least one to-be-encoded region, generating a predictive vector of the to-be-encoded region of the to-be-encoded frame using a plurality of motion vectors as a plurality of reference vectors, the motion vectors being generated with respect to at least one reference frame selected from the encoded frames for a motion compensative prediction when encoding an original region of the encoded region around the to-be-encoded region of the to-be-encoded frame, and encoding the to-be-encoded frame to generate encoded video data.Type: ApplicationFiled: May 11, 2007Publication date: September 13, 2007Inventors: Yoshihiro KIKUCHI, Takeshi Chujoh, Shinichiro Koto
-
Publication number: 20070211803Abstract: At least one exemplary embodiment is directed to an image coding apparatus configured to encode moving image data including: a coding unit configured to encode each picture in the moving image data in a unit of a first block; a luminance change detection unit configured to divide the moving image data into a plurality of second blocks and to detect a luminance change block in which a luminance change occurred from the plurality of the second blocks in one picture; and a code amount adjustment unit configured to increase an amount of code allocated to the first block if the first block corresponds to the luminance change block detected by the luminance change detection unit.Type: ApplicationFiled: March 6, 2007Publication date: September 13, 2007Applicant: CANON KABUSHIKI KAISHAInventor: Akihiro Oishi
-
Publication number: 20070211804Abstract: The invention is based on the idea of providing a method for high-resolution, waveform-preserving digitization of analog signals, wherein conventional scalar logarithmic quantization is transferred to multi-dimensional spherical coordinates, and the advantages resulting from this, e.g., a constant signal/noise ratio over an extremely high dynamic range with very low loss with respect to the rate-distortion theory. In order to make use of the statistical dependencies present in the source signal for an additional gain in the signal/noise ratio, the differential pulse code modulation (DPCM) is combined with spherical logarithmic quantization. The resulting method achieves an effective data reduction with a high long-term and short-term signal/noise ratio with an extremely small signal delay.Type: ApplicationFiled: July 23, 2004Publication date: September 13, 2007Inventors: Axel Haupt, Volker Schmitt, Johannes Huber, Bernd Matschkal
-
Publication number: 20070211805Abstract: A communications system may include a transmitting device for transmitting a modulated signal therefrom based upon first and second input data. The transmitting device may include a baseband injected pilot carrier (BPIC) generator for selectively generating BPIC data corresponding to the first input data, an interleaver for interleaving BPIC data with the second input data, and a modulator for modulating the interleaved BPIC data based upon a first modulation type and modulating the second input data based upon a second modulation type to provide a modulated signal. The communications system may further include a receiving device for receiving the modulated signal from the transmitting device. The receiving device may include a BPIC detector and a demodulator cooperating with the BPIC detector for demodulating the modulated signal from the transmitting device based upon the BPIC data to generate the first and second input data.Type: ApplicationFiled: March 13, 2006Publication date: September 13, 2007Applicant: Harris CorporationInventors: Daniel Boritzki, Michael Luntz
-
Publication number: 20070211806Abstract: Systems and methods are provided for improving a channel estimate in a signal communication system. The systems and methods improve the channel estimation quality and/or the delay spread of the channels that can be estimated. The combining of symbols operates to increase the density of pilots that are processed to provide the channel estimate.Type: ApplicationFiled: August 16, 2006Publication date: September 13, 2007Inventors: Sriram Mudulodu, Louay Jalloul
-
Publication number: 20070211807Abstract: An apparatus for controlling PAPR in an OFDM communication system and method thereof are disclosed, by which implementation is simplified and enhanced PAPR characteristics are provided. The present application includes outputting GNb data symbols by oversampling Nb parallel data symbols, spreading the oversampled data symbols using DFT, and mapping the spread signal to subcarriers.Type: ApplicationFiled: March 12, 2007Publication date: September 13, 2007Inventors: Seung Hee Han, Min Noh, Yeong Kwon
-
Publication number: 20070211808Abstract: Provided is an apparatus and method for calibrating an imbalance characteristic of a received signal of a frequency domain in a mobile receiver which supports an Orthogonal Frequency Division Multiplexing (OFDM) scheme. To this end, a received signal of a radio frequency band is converted into a baseband signal by using a carrier, and the baseband received signal is converted from a time domain signal to a frequency domain signal. Then, a calibration coefficient is measured by using two consecutively received signals from the Fast Fourier Transform (FFT) unit. An imbalance component included in the received signal of the frequency domain due to an imbalance of the carrier is removed by using the measured calibration coefficient. In this case, the two consecutively received signals refer to two transmission signals consecutively transmitted from a transmitter, and the two transmission signals are predetermined signals.Type: ApplicationFiled: February 22, 2007Publication date: September 13, 2007Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Hyun-Il Kang, Jae-Kon Lee, Hyeong-Seok Yu, Sang-Hyun Woo
-
Publication number: 20070211809Abstract: A method for estimating a symbol timing offset in an Orthogonal Frequency Division Multiplexing (OFDM) communication system is disclosed. The method includes detecting a channel impulse response within one Fast Fourier Transform (FFT) duration; and estimating a symbol timing offset taking the detected channel impulse response into account. The symbol timing offset estimation includes calculating a channel delay duration depending on the detected channel impulse response; and estimating the symbol timing offset such that the channel impulse response is detected within a guard interval, taking into account the calculated channel delay duration and the guard interval existing in the one FFT duration.Type: ApplicationFiled: March 6, 2007Publication date: September 13, 2007Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventor: Kwang-Chul Kim
-
Publication number: 20070211810Abstract: A wireless multicarrier transmission method in which a multicarrier transmission uses n modulated frequency subcarriers (n is an integer number), and a fading condition of each subcarrier is detected to generate fading channel profile information.Type: ApplicationFiled: May 11, 2007Publication date: September 13, 2007Applicant: Sony Deutschland GmbHInventors: Ralf BOHNKE, Seiichi Izumi
-
Publication number: 20070211811Abstract: Techniques to derive a channel estimate using substantially fewer number of complex multiplications than with a brute-force method to derive the same channel estimate. In one method, an intermediate vector B is initially derived based on K sub-vectors of a vector ? for a channel frequency response estimate and at least two DFT sub-matrices for a DFT matrix {tilde over (W)}, where K>1. An intermediate matrix A for the DFT matrix {tilde over (W)} is also obtained. A least square channel impulse response estimate is then derived based on the intermediate vector B and the intermediate matrix A. In one implementation, the intermediate vector B is obtained by first computing DFTs of a matrix ?T×L, which is formed based on the vector ?, to provide a matrix GL×L. Inner products between the columns of a base DFT sub-matrix W1 and the rows of the matrix GL×L are then computed to obtain the entries of the intermediate vector B.Type: ApplicationFiled: May 16, 2007Publication date: September 13, 2007Inventors: Anand Subramaniam, Tamer Kadous
-
Publication number: 20070211812Abstract: An input estimator is based on a combined MFDQ-DF and trellis for use in, for example, an ADSL environment. In particular, for an ADSL implementation, the system will have one feedback tap for the decision feedback. However, it should be appreciated that the idea and basic concept of using the structure of a trellis to aid in determining the feedback point can be extended to any system using a feedback equalizer to estimate input to a trellis decoder.Type: ApplicationFiled: May 15, 2007Publication date: September 13, 2007Applicant: Aware, Inc.Inventors: Guillermo Del Angel, Arnon Friedmann, Stuart Sandberg, Richard Gross, Peter Heller
-
Publication number: 20070211813Abstract: Methods and systems for communicating in a wireless network include mitigating co-channel interference (CCI) for precoded multiple-input multiple-output (MIMO) systems and incorporating the effect of CCI mitigation on channel characteristics in the design of channel state information (CSI) feedback mechanisms. Various embodiments and variants are also disclosed.Type: ApplicationFiled: March 10, 2006Publication date: September 13, 2007Inventors: Shilpa Talwar, Roopsha Samanta, Nageen Himayat
-
Publication number: 20070211814Abstract: For data transmission with spatial spreading, a transmitting entity (1) encodes and modulates each data packet to obtain a corresponding data symbol block, (2) multiplexes data symbol blocks onto NS data symbol streams for transmission on NS transmission channels of a MIMO channel, (3) spatially spreads the NS data symbol streams with steering matrices, and (4) spatially processes NS spread symbol streams for full-CSI transmission on NS eigenmodes or partial-CSI transmission on NS spatial channels of the MIMO channel. A receiving entity (1) obtains NR received symbol streams via NR receive antennas, (2) performs receiver spatial processing for full-CSI or partial-CSI transmission to obtain NS detected symbol streams, (3) spatially despreads the NS detected symbol streams with the same steering matrices used by the transmitting entity to obtain NS recovered symbol streams, and (4) demodulates and decodes each recovered symbol block to obtain a corresponding decoded data packet.Type: ApplicationFiled: March 8, 2007Publication date: September 13, 2007Applicant: QUALCOMM INCORPORATEDInventors: Jay Walton, John Ketchum, Mark Wallace, Steven Howard
-
Publication number: 20070211815Abstract: A method and apparatus for scaling a soft bit for decoding in a wireless communication system are described. A scaling factor is calculated for a received symbol based on an estimated signal-to-noise ratio (SNR) of the received symbol and the scaling factor is applied to a soft bit of the received symbol. A multiple-input multiple-output (MIMO) scheme may be implemented to transmit multiple data streams. In such case, a soft bit of a received symbol on each data stream is scaled by a scaling factor for the received symbol on each data stream.Type: ApplicationFiled: March 8, 2007Publication date: September 13, 2007Applicant: INTERDIGITAL TECHNOLOGY CORPORATIONInventors: Jung-Lin Pan, Donald Grieco, Nirav Shah, Robert Olesen
-
Publication number: 20070211816Abstract: An apparatus and method for transmitting and receiving a data stream in a multi-antenna system, in which a plurality of data streams are received, a plurality of code symbol sequences are generated by precoding the plurality of data streams, the code symbol sequences being mapped to the transmit antennas in a one-to-one correspondence, the code symbol sequences being delayed by delay times for the mapped transmit antennas, and the delayed code symbol sequences are transmitted through the mapped transmit antennas.Type: ApplicationFiled: February 28, 2007Publication date: September 13, 2007Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventor: Duck-Dong Hwang
-
Publication number: 20070211817Abstract: A computer numerical control (CNC) wireless transmission system comprises a direct numerical control (DNC) server, which converts the numerical control program to the radio data for transmission. The DNC server connects to an access point, which has an antenna for the transmission of the numerical control data in radio frequency. The wireless transmitter can receive the radio data transmitted from the antenna of the access point. Furthermore, the wireless transmitter has high mobility, which allows the CNC wireless transmission system itself to have flexible arrangement in positioning.Type: ApplicationFiled: March 13, 2006Publication date: September 13, 2007Inventor: Frank Chen
-
Publication number: 20070211818Abstract: A method and an apparatus for bit-rate enhancement and a wireless communication system using the same are disclosed. According to the present invention, two approaches are provided for bit-rate enhancement: one is an increase of chip-rate and the other is a decrease of chip number associated with on symbol. As such, the transmission bit-rate can be enhanced significantly so as to facilitate the applications of wireless voice communications or security.Type: ApplicationFiled: March 7, 2007Publication date: September 13, 2007Applicant: Uniband Electronic Corp.Inventors: Hung-Cheng Chien, Szu-Wei Hou, Yi-Chun Lu
-
Publication number: 20070211819Abstract: A digital circuit configured to spread a clock train spectrum includes a clock configured to generate the clock train, and a variable divider configured to divide the frequency of the clock train by a temporally-varying-divider value to modulate the clock train and generate a dithered clock train. The circuit further includes a first accumulator configured to accumulate the dithered clock train to generate a frequency modulation waveform, and a second accumulator configured accumulate the frequency modulated waveform to generate a phase modulation signal. The circuit further includes a phase-value calculator configured to calculate the temporally-varying divider value based on the phase modulation signal; and a closed-loop control circuit configured to track and filter the modulation of the dithered clock train to generate a second clock train that is the spread spectrum of the first mentioned clock train.Type: ApplicationFiled: May 11, 2007Publication date: September 13, 2007Inventor: Jody Greenberg
-
Publication number: 20070211820Abstract: In a first mode in which the power level of a transmission output signal (S6) is to be high, an output from the multiplier (2) is input to an amplitude modulation signal amplifier (4), and a radio frequency power amplifier (5) performs amplitude modulation on a radio frequency phase modulated signal (S4) using a nonlinear area with a supply voltage from the amplitude modulation signal amplifier (4). In a second mode in which the power level of a transmission output signal (S6) is to be low, the output from the multiplier (2) is input to a variable gain amplifier (7), and the variable gain amplifier (7) performs amplitude modulation on the radio frequency phase modulated signal (S4). The amplitude modulated signal is output without passing through the radio frequency power amplifier (5).Type: ApplicationFiled: February 2, 2006Publication date: September 13, 2007Inventors: Yoshihiro Hara, Toru Matsuura
-
Publication number: 20070211821Abstract: In a digital Cartesian modulation transmitter, an encoder generates 1-bit logic signals from in-phase and quadrature signals. A single bit digital modulator multiplexes the 1-bit logic signals for Cartesian I/Q modulation. A digital upconverter (DUC) upconverts the multiplexed 1-bit logic signal. A digital power amplifier (DPA) generates a radio frequency (RF) signal based on the upconverted signal. In a digital polar modulation transmitter, an encoder converts a magnitude signal to a first 1-bit logic signal. A digital phase modulator modulates a carrier using a phase signal to generate a second 1-bit logic signal. A DUC upconverts the second 1-bit logic signal. A first-in first-out (FIFO) memory stores the first 1-bit logic signal. A combiner combines angle information contained in the second 1-bit logic signal with magnitude information contained in the first 1-bit logic signal stored in the FIFO memory. A DPA generates an RF signal based on the combined signal.Type: ApplicationFiled: March 12, 2007Publication date: September 13, 2007Applicant: INTERDIGITAL TECHNOLOGY CORPORATIONInventors: Tanbir Haque, Leonid Kazakevich
-
Publication number: 20070211822Abstract: A method and apparatus for implementing spatial processing with unequal modulation and coding schemes (MCSs) or stream-dependent MCSs are disclosed. Input data may be parsed into a plurality of data streams, and spatial processing is performed on the data streams to generate a plurality of spatial streams. An MCS for each data stream is selected independently. The spatial streams are transmitted via multiple transmit antennas. At least one of the techniques of space time block coding (STBC), space frequency block coding (SFBC), quasi-orthogonal Alamouti coding, time reversed space time block coding, linear spatial processing and cyclic delay diversity (CDD) may be performed on the data/spatial streams. An antennal mapping matrix may then be applied to the spatial streams. The spatial streams are transmitted via multiple transmit antennas. The MCS for each data stream may be determined based on a signal-to-noise ratio of each spatial stream associated with the data stream.Type: ApplicationFiled: January 10, 2007Publication date: September 13, 2007Applicant: INTERDIGITAL TECHNOLOGY CORPORATIONInventors: Robert Olesen, Eldad Zeira, Peter Voltz, Yongwen Yang, Qingyuan Dai, Chang-Soo Koo, I-Tai Lu, KunJu Tsai
-
Publication number: 20070211823Abstract: An apparatus and method for transmission and reception in a multi-user Multiple-Input Multiple-Output (MIMO) communication system are provided. In a transmitter, a filter portion receives quantized Channel State Information (CSI) and Channel Quality Information (CQI) from a receiver, calculates a transmit filter value using on the quantized CSI and the CQI, determines an appropriate AMC level for the receiver, and sends a pilot signal including the transmit filter value and information about the determined AMC level on subcarriers in one of a preamble and data symbols. An antenna is used to send the output of the filter portion and receives data from the receiver.Type: ApplicationFiled: February 21, 2007Publication date: September 13, 2007Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: David Mazzarese, Sung-Ryul Yun, Dong-Seek Park
-
Publication number: 20070211824Abstract: A digital quadrature modulation circuit includes a quadrature modulator, a D/A converter, and a frequency converter. The quadrature modulator orthogonally modulates local oscillation signals +cos ?0t and +sin ?0t according to inputted in-phase component data I0 and orthogonal component data Q0, adds up two digital signals I0 cos ?0t and Q0 sin ?0t after the quadrature modulation, and outputs a digital signal (I0 cos ?0t+Q0 sin ?0t) after the addition. The D/A converter converts the digital signal (I0 cos ?0t+Q0 sin ?0t) outputted from the quadrature modulator into an analog signal, and outputs the analog signal. The frequency converter converts a frequency of the analog signal from the D/A converter by mixing the analog signal with carrier signals +cos ?1t and +sin ?1t, respectively.Type: ApplicationFiled: February 27, 2007Publication date: September 13, 2007Inventor: Masazumi Yamazaki
-
Publication number: 20070211825Abstract: A Gaussian Frequency Shift Keying/Frequency Shift Keying (GFSK/FSK) modulation circuit implemented in a digital manner comprises a frequency divider for dividing frequency of an inputted clock signal to get a sampling signal, a buffer coupled to the frequency divider for storing inputted data, an integrator coupled to the buffer for processing integration according to the data outputted from the buffer, a first read only memory coupled to the integrator for transferring the data outputted from the integrator according to a cosine function, and a second read only memory coupled to the integrator for transferring the data outputted from the integrator according to a sine function.Type: ApplicationFiled: November 28, 2006Publication date: September 13, 2007Inventors: Kwo-Wei Chang, Wen-Jan Lee
-
Publication number: 20070211826Abstract: The invention relates to a method for transmitting data, whereby all necessary information is transmitted on the basis of a global scaling modulation and demodulation by random processes, by carrying out a modulation, coupling or decoupling and demodulation of resonating frequency-coupled noise processes.Type: ApplicationFiled: February 2, 2005Publication date: September 13, 2007Inventors: Ralf Otte, Hartmut Muller, Martin Nathansen
-
Publication number: 20070211827Abstract: A method of signal processing and a signal processor for a receiver for OFDM encoded digital signals. The OFDM encoded digital signals are transmitted as data symbol sub-carriers in several frequency channels. A subset of said sub carriers is in the form of pilot sub-carriers having a value known to the receiver. A first estimation of channel coefficients (H0) at said pilot sub-carriers is performed followed by cleaning of the estimated channel coefficients (H0) at the pilot sub-carriers. Then, a second estimation of channels coefficients (H1) is performed at the data symbol sub-carriers. The first estimation is performed by dividing received symbols (yp) at said pilot sub-carriers by the known pilot symbols (ap). the channel frequency response is supposed to vary linearly within one OFDM symbol. Therefore for each symbol and sub-band, a channel frequency response and its derivate are calculated or interpolated.Type: ApplicationFiled: May 23, 2005Publication date: September 13, 2007Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V.Inventors: Constant Baggen, Sri Husen, Maurice Stassen, Hoi Tsang
-
Publication number: 20070211828Abstract: Disclosed herein is an apparatus for receiving a wide-band pulse signal in a communication channel using a human body. When a weak wide-band pulse signal, which is output from a communication channel using a human body as a data transmission medium, is restored to a digital signal, it is possible to accomplish low power consumption and high data transmission rate using a wide-band symmetrical triggering technology using 50-? impedance matching, wide-band amplification and symmetrical threshold voltages. In addition, since only a single signal electrode is used, it is possible to provide an apparatus having usability, wearability and miniaturization. In addition, it is possible to remove necessities of an external reference voltage to reduce area consumption and to simply adjust a feedback resistor to easily adjust the reception sensitivity according to a communication distance.Type: ApplicationFiled: March 6, 2007Publication date: September 13, 2007Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Seong-Jun Song, Hoi-Jun Yoo
-
Publication number: 20070211829Abstract: Methods and apparatus for reducing signal degradation of a communications signal caused by reducing the average-to-minimum amplitude ratio (AMR) of a communications signal. According to one exemplary method, times when the amplitude of a communications signal falls below or is likely to fall below a predetermined magnitude minimum. Corrective pulses are generated, which are combined with the communications signal in the temporal vicinities when the amplitude of the communications signal falls below the predetermined magnitude minimum, to reduce the AMR of the communications signal. The corrective pulses are generated by a nonlinear filter that is configured to minimize the amount of in-channel distortion the corrective pulses introduce to the communications signal by their insertion while substantially preserving an out-of-band measure of quality of the communications signal.Type: ApplicationFiled: November 2, 2006Publication date: September 13, 2007Inventors: Paul Liang, Stephan Schell
-
Publication number: 20070211830Abstract: A radio receiver includes a processing unit that may generate a respective phase value corresponding to each of a plurality of digital samples of a received complex frequency modulation (FM) signal. The receiver also includes an impulse unit that may detect whether a linear combination of a phase value of a current sample and a phase value of one or more previous samples will produce an impulse at an output of an FM demodulator. If the impulse unit detects that an impulse will be produced at the output, the impulse unit may replace the output of the FM discriminator with a predetermined value.Type: ApplicationFiled: March 13, 2006Publication date: September 13, 2007Inventors: Javier Elenes, Dana Taipale
-
Publication number: 20070211831Abstract: A signal processing apparatus (400;800) comprising: a demodulator (e.g. a PSK demodulator) (407;900) arranged to demodulate a received signal, which carries consecutive symbols (a1, . . . , a4) at a symbol rate, wherein the demodulator (407;900) is arranged, based on sample values of the received signal, to calculate an error value (?m) of a given symbol relative to a decision-directed determination of an expected symbol value ({circumflex over (?)}); and a phase-shifter (406,409;801;1002,1013) arranged to shift the phase of sampling points in time at which points in time, sample values of the received signal is provided to the demodulator (407;1000).Type: ApplicationFiled: December 16, 2003Publication date: September 13, 2007Inventor: Leif Wilhelmsson
-
Publication number: 20070211832Abstract: Provided is a channel estimation apparatus and method. In the channel estimation apparatus, a channel estimator performs channel estimation onto a received symbol and output a channel estimation result. The channel estimation result is stored in an estimation buffer along with a channel estimation result compensated in a preamble phase compensator. The preamble phase compensator receives a channel estimation result for pilot subcarriers of a data symbol and a preamble channel estimation result from the estimation buffer, acquires a phase rotation value between them, and compensates the preamble channel estimation result with the phase rotation value. When FCH and DL-MAP are demodulated, pilot subcarriers in the Nth PUSC symbol have been used to estimate the channel of the Nth PUSC symbol.Type: ApplicationFiled: February 26, 2007Publication date: September 13, 2007Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Seo-Goo Lee, Tae-Gon Kim, Min-Cheol Park, Yun-Sang Park, Bong-Gee Song, In-Hyoung Kim
-
Publication number: 20070211833Abstract: A method and an apparatus to detect data in a data storage device, and a method and an apparatus to effectively detect data in channels having characteristics in which bands of data to be reproduced are limited. The method includes partially selecting partial paths from paths of a Viterbi trellis having a number corresponding to an order of a polynomial used in equalization, in an order where path metric values increase from a path having a minimum path metric value, deciding a best path having a minimum path metric value among the partial paths, and detecting data based on the best path.Type: ApplicationFiled: March 8, 2007Publication date: September 13, 2007Applicant: Samsung Electronics Co., Ltd.Inventors: Joo-hyun LEE, Jae-jin LEE, Jong-yun YUN
-
Publication number: 20070211834Abstract: Systems and methods are provided for dynamically analyzing radar pulses at a receiver. A digital signal is provided to an amplitude detector. At least one digital waveform representing an emitter pulse is identified at the amplitude detector. A matched filter associated with the emitter is generated, comprising at least one characteristic of the identified digital waveform.Type: ApplicationFiled: March 13, 2006Publication date: September 13, 2007Inventor: J. Johnson
-
Publication number: 20070211835Abstract: A synchronization timing detecting apparatus includes a correlation calculator configured to generate a first correlation value by calculating a cross-correlation between an input signal being sampled and a reference signal or an auto-correlation of the sampled input signal, an interpolation processor configured to generate a second correlation value interpolating a plurality of the first correlation values having a different combination of sampling points of the input signal, and a detector to detect a synchronization timing based on the first and the second correlation values.Type: ApplicationFiled: February 23, 2007Publication date: September 13, 2007Applicant: NEC ELECTRONICS CORPORATIONInventors: Osamu Inagawa, Junya Tsuchida
-
Publication number: 20070211836Abstract: A method and apparatus for cancelling interference in received signals are disclosed. A receiver includes a knowledge-based interference cancellation unit, a blind interference cancellation unit and a trade-off management unit. The knowledge-based interference cancellation unit cancels interference in the received signals based on pre-known knowledge and the blind interference cancellation unit cancels interference in the received signals without the pre-known knowledge. The trade-off management unit determines a trade-off between knowledge-based interference cancellation and blind interference cancellation, whereby at least one of the knowledge-based interference cancellation and the blind interference cancellation is selectively preformed based on the trade-off. The interference cancellation may be performed by implementing at least one of a successive interference cancellation (SIC), a principal component analysis (PCA) and an independent component analysis (ICA).Type: ApplicationFiled: September 13, 2006Publication date: September 13, 2007Applicant: INTERDIGITAL TECHNOLOGY CORPORATIONInventors: Prabhakar R. Chitrapu, Steven Jeffrey Goldberg
-
Receiver with sliding intermediate frequency (IF) architecture and programmable bandwidth and method
Publication number: 20070211837Abstract: Embodiments of a multi-mode receiver, transmitter, and method are generally described herein. Other embodiments may be described and claimed. In some embodiments, a sliding IF architecture that uses a zero-IF mixer and partially overlapping baseband filters is employed to operate over various bandwidths and help remove adjacent interferers.Type: ApplicationFiled: March 13, 2006Publication date: September 13, 2007Inventor: Eliav Zipper -
Publication number: 20070211838Abstract: Timing signal recovery and distribution apparatus and methods are disclosed. A timing synchronization source signal is selected from timing signals recovered by multiple communication devices. The timing signals may have any of multiple different frequencies. A timing distribution signal is generated by applying to the selected synchronization source signal one of multiple timing distribution signal generation schemes. The multiple generation schemes allow a timing distribution signal to be generated on the basis of synchronization source signals having respective different frequencies.Type: ApplicationFiled: March 8, 2006Publication date: September 13, 2007Inventors: Dion Pike, James Schriel, John Madsen
-
Publication number: 20070211839Abstract: There is provided a sampling timing monitoring system, which includes at least one abnormal state detection circuit. The at least one abnormal state detection circuit includes a pulse generation circuit that generates a pulse having a pulse width corresponding to a relationship between timing of a driving signal for driving an image pickup device and timing of a sampling signal to be supplied to a sampling circuit carrying out correlated double sampling for an analog output signal outputted by the image pickup device, and a detection circuit that detects an abnormal state of the timing of the sampling signal with respect to the timing of the driving signal in accordance with the pulse width of the pulse generated by the pulse generation circuit.Type: ApplicationFiled: March 6, 2007Publication date: September 13, 2007Applicant: PENTAX CORPORATIONInventor: Tadaaki Suda
-
Publication number: 20070211840Abstract: Methods and apparatus are provided for analyzing transmission lines with decoupling of connectors and other circuit elements. According to one aspect of the invention, circuits with one or more parasitic elements are analyzed by partitioning at least one of the parasitic elements in a transverse manner; identifying a plurality of subcircuits each comprised of partitioned circuit elements from the plurality of transmission lines and one or more parasitic elements in a given path; wherein each of the subcircuits is associated with a path in the circuit; performing a waveform relaxation analysis between each of the subcircuits; and repeating the step of performing the waveform relaxation analysis using waveforms determined in a previous iteration until convergence to a resultant waveform has occurred. The circuit can optionally further comprise one or more transmission lines which would also be partitioned in a transverse manner.Type: ApplicationFiled: February 17, 2006Publication date: September 13, 2007Applicant: International Business Machines CorporationInventors: Ibrahim Elfadel, Hao Huang, Albert Ruehli
-
Publication number: 20070211841Abstract: A sonofusion device is disclosed. The device has a reactor vessel for containing a cavitating liquid and for defining an axial wave path. A fusionable material located along said axial wave path, and a plurality of vibration elements are positioned along said axial wave path. Each of the vibration elements are sized and shaped to generate radial pressure waves converging on said axial wave path to create an antinode at least on said axial wave path. A controller is provided for said vibration elements to control the timing of when said radial pressure waves generated by said vibration elements converge on said axial wave path and to thereby create an axial pressure wave travelling along said axial wave path at a predetermined velocity. Also provided is a bubble initiator in said cavitating liquid at said antinode. A method of creating nuclear fusion is also disclosed and comprehended.Type: ApplicationFiled: March 7, 2007Publication date: September 13, 2007Inventor: Nicholas Tomory
-
Publication number: 20070211842Abstract: Non-destructive testing apparatus may comprise a photon source and a source material that emits positrons in response to bombardment of the source material with photons. The source material is positionable adjacent the photon source and a specimen so that when the source material is positioned adjacent the photon source it is exposed to photons produced thereby. When the source material is positioned adjacent the specimen, the specimen is exposed to at least some of the positrons emitted by the source material. A detector system positioned adjacent the specimen detects annihilation gamma rays emitted by the specimen. Another embodiment comprises a neutron source and a source material that emits positrons in response to neutron bombardment.Type: ApplicationFiled: January 24, 2007Publication date: September 13, 2007Inventor: Douglas Akers
-
Publication number: 20070211843Abstract: A spacer grid having tunable mixing vanes for optimizing coolant flow is provided for a nuclear fuel assembly. The mixing vanes include an upper piece and a lower piece, which are coupled to a middle ligament that is coupled to the top or downstream portion of one or more of the grid straps forming the spacer grid. The upper piece, lower piece, and middle ligament are bent, rotated, and/or twisted into various positions to more effectively mix the coolant and affect the coolant's flow as it moves upwards through the fuel assembly. For example, in one embodiment, the mixing vane has an “S” shape wherein the middle ligament is positioned parallel to the longitudinal axes of the fuel rods of the fuel assembly, the upper piece bends towards one of the fuel rods, and the lower piece bends away from the fuel rod. In this manner, optimized even and sustained mixing of the coolant is provided.Type: ApplicationFiled: March 9, 2006Publication date: September 13, 2007Inventors: Levie Smith, Michael Marzean
-
Publication number: 20070211844Abstract: With a view to providing a radiographing plan assisting method which can easily prepare a radiographing plan by utilizing a user interface, it is made possible to select an anatomical region through a user interface, select through a user interface an anatomical area belonging to the selected anatomical region, select a radiographing protocol for the selected anatomical area through a user interface, and select a feature of the selected radiographing protocol through a user interface.Type: ApplicationFiled: September 14, 2006Publication date: September 13, 2007Inventors: Yilun Shi, Xueli Wang
-
Publication number: 20070211845Abstract: X-ray CT apparatus includes an x-ray data collecting device for collecting x-ray projection data transmitted by a subject positioned between an x-ray generating device and a multi-row x-ray detector, while rotating said x-ray generating device and said multi-row x-ray detector around a rotation center positioned in-between, an image reconstructing device for performing image reconstruction from the projection data collected from the x-ray data collecting device, an image display device for displaying a tomogram obtained by image reconstruction, and a scanning condition setting device for setting various scanning conditions of tomography scanning.Type: ApplicationFiled: January 6, 2007Publication date: September 13, 2007Inventors: Akihiko Nishide, Akira Hagiwara, Kotoko Morikawa