Patents Issued in December 30, 2010
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Publication number: 20100329366Abstract: A physical layer convergence protocol (PLCP) data structure (300) transmitted in a multiple-input-multiple-output (MIMO) communication system. The PLCP data structure comprises a legacy portion including a legacy preamble (311) and a legacy header (312), wherein the legacy preamble (311) and the legacy header (312) carry information compliant with at least a WiMedia standard; and a high throughput (HT) portion including a HT preamble (321) and a HT header (322), and wherein the HT preamble (321) carries information enabling a receiver of the MIMO communication system to decode received signals.Type: ApplicationFiled: March 9, 2009Publication date: December 30, 2010Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V.Inventors: Dong Wang, Jun Yang, Dagnachew Birru
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Publication number: 20100329367Abstract: A tone monitoring apparatus comprises a tone detector arranged to detect, when in use, a tone having a first duration equal to or greater than a predetermined duration. The tone detector is further arranged to select, when in use, a first signal path between a channel input and a channel output, the selection being in response to the first duration of the tone being equal to or greater than the predetermined duration.Type: ApplicationFiled: March 14, 2008Publication date: December 30, 2010Applicant: FREESCALE SEMICONDUCTOR, INC.Inventor: Dragos Ion
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Publication number: 20100329368Abstract: A second communication device which communicates with a first communication device, the second communication device including: a reception unit which receives an initial transmission signal and at least one retransmission signal; and an iterative detection and decoding unit which performs iterative processes of signal detection and signal decoding for at least one received signal among received signals received by the reception unit, wherein the iterative detection and decoding unit includes: a combining unit which combines a result of signal detection obtained from at least one other received signal in one of the iterative processes.Type: ApplicationFiled: February 19, 2009Publication date: December 30, 2010Inventors: Kazuyuki Shimezawa, Takashi Yoshimoto, Ryota Yamada, Toshizo Nogami
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Publication number: 20100329369Abstract: A method of wireless communication is disclosed that includes receiving detected channel information from a plurality of access terminals; selecting a set of access terminals from the plurality of access terminals based on the received channel information; creating a beamforming vector for each access terminal in the set of selected access terminals; and transmitting a signal using at least one of the created beamforming vectors. An apparatus for performing the method is also disclosed herein.Type: ApplicationFiled: June 26, 2009Publication date: December 30, 2010Applicant: QUALCOMM IncorporatedInventors: Jilei Hou, Jinghu Chen, John E. Smee, Joseph B. Soriaga, Navid Hassanpour Ghady
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Publication number: 20100329370Abstract: A method and apparatus of a subscriber station selecting a subset of a plurality of antennas for uplink transmission are disclosed. One method includes a base station transmitting a cyclic delay diversity transmission signal. The subscriber station receives the cyclic delay diversity transmission signal through the plurality of antennas. The subscriber station selects a subset of the plurality of antennas based on a received quality signal parameter. The subscriber station transmits uplink signals to the base station through the selected subset of the plurality of antennas.Type: ApplicationFiled: April 22, 2010Publication date: December 30, 2010Applicant: BECEEM COMMUNICATIONS INC.Inventors: Bertrand Hochwald, Louay Jalloul, Arogyaswami Paulraj
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Publication number: 20100329371Abstract: Provided are a base station configured to provide an interference vector indicator to a terminal, and the terminal configured to recognize at least one remaining precoding vector using the interference vector indicator. Each of the base station and the terminal may configure a mapping table between at least one bit for the interference vector indicator indicating the at least one remaining precoding vector, and a plurality of vectors included in a codebook, based on a probability that the plurality of vectors may be included in a precoding matrix. In this instance, the base station may generate the interference vector indicator using the mapping table, and the terminal may recognize the at least one remaining precoding vector using the mapping table. The mapping table may be differently configured according to various modes.Type: ApplicationFiled: January 9, 2009Publication date: December 30, 2010Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Yongxing Zhou, Joon-Il Choi
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Publication number: 20100329372Abstract: A method and apparatus for generating a carrier frequency signal is disclosed. The method includes generating a first frequency signal; injecting a modulation signal at a first point of the two-point modulation architecture; generating a second frequency signal from the modulation signal; introducing the second frequency signal by mixing the first frequency signal and the second frequency signal to generate a mixed frequency signal and outputting the carrier frequency signal selected from the mixed frequency signal.Type: ApplicationFiled: June 21, 2010Publication date: December 30, 2010Applicant: Huawei Technologies Co., Ltd.Inventors: Christian Grewing, Anders Jakobsson, Ola Pettersson, Anders Emericks, Bingxin Li
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Publication number: 20100329373Abstract: A receiver for receiving a signal including a series of symbols, the signal being performed Time Window processing at portions including a boundary of adjacent symbols by a transmitter so as to eliminate a discontinuity between the symbols, the receiver includes: a receiving unit that receives the signal; and a processor extracts the series of symbols and performing an inverse processing of the Time Window processing at the portions performed the Time Window processing by the transmitter.Type: ApplicationFiled: June 22, 2010Publication date: December 30, 2010Applicant: FUJITSU LIMITEDInventor: Jun Kameya
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Publication number: 20100329374Abstract: A method and multiple antenna transmitting apparatus for transmitting a midamble in a wireless communication system, and a method and receiving device for receiving a midamble in a wireless communication system are provided. A method for transmitting a midamble by a multiple antenna transmitting device includes determining a pattern for a midamble including null subcarriers and pilot subcarriers, wherein each of the pilot subcarriers corresponds to one of a plurality of pilot signals, and each of the plurality of pilot signals corresponds to a different one of a plurality of transmit antennas, and transmitting the pilot signals in corresponding pilot subcarriers based on the determined pattern, wherein the pilot signals are transmitted in an Orthogonal Frequency Division Multiplexing (OFDM) symbol of a resource block comprising a plurality of subcarriers and a plurality of OFDM symbols.Type: ApplicationFiled: June 24, 2010Publication date: December 30, 2010Applicant: SAMSUNG ELECTRONICS CO. LTD.Inventor: Zhouyue PI
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Publication number: 20100329375Abstract: A channel estimation unit 18 estimates characteristics of a channel (channel estimation) based on signals received by a plurality of antennas. An SVD unit 19 performs singular value decomposition on each channel estimation value. An orthogonality determination unit 20 determines (recognizes) whether orthogonality of a plurality of eigenpaths is maintained or collapsed based on information indicating quality of a channel between a transmission apparatus and a reception apparatus. A reception scheme estimation unit 22 estimates a reception scheme to separate eigenpaths of a reception unit 2 based on information indicating quality of a channel in each eigenpath. A transmission adaptive control unit 23 performs predetermined control of a transmission apparatus 1 at transmission based on the reception scheme of the reception apparatus estimated by the reception scheme estimation unit 22 and a result of determination (recognition) by the orthogonality determination unit 20.Type: ApplicationFiled: January 22, 2009Publication date: December 30, 2010Applicant: Kyocera CorporationInventor: Taku Nakayama
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Publication number: 20100329376Abstract: A method (400) for performing a fast multiple-subcarrier-joint-modulation (MSJM) precoding. The method comprises grouping input information bits into bit blocks (S410); converting the bit blocks into bit vectors (S420); mapping a first group of bits of each bit vector to a real dimension of symbols in a symbol vector (S430); mapping a second group of bits of each bit vector to an imaginary dimension of symbols in the symbol vector (S430), wherein the mapping of the real dimension and the mapping of imaginary dimension are performed simultaneously; and modulating symbol vectors into data subcarriers (S440).Type: ApplicationFiled: March 9, 2009Publication date: December 30, 2010Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V.Inventors: Dong Wang, Yue Shang
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Publication number: 20100329377Abstract: A radio communication system whereby one or a consecutive plurality of sub-carrier frequency intervals form sub-carrier groups each of which is assigned to a different user. The radio communication system includes a radio communication apparatus and a terminal configured to receive a control signal and a data signal from the radio communication apparatus. The terminal receives the control signal and the data signal according to a notified control signal position.Type: ApplicationFiled: September 9, 2010Publication date: December 30, 2010Applicant: FUJITSU LIMITEDInventor: Takayoshi ODE
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Publication number: 20100329378Abstract: MIMO detection is described that reduces the complexity of computations for finding the soft bit output. The detection process includes QR factorization splitting the distance calculations into two groups, subset lookup using a last cross constellation set (LCCS) lookup, and minimal distance lookup with soft bit output calculation. By grouping the distance calculations into a first group that has one antenna transmitting using a modulation scheme with a generally square constellation diagram and a second group for all of the other antenna constellation diagrams, the LCCS lookup process may be used which substantially reduces the number of calculations to be made in the detection process. Moreover, in the special case of 2×2 antenna, QR factorization is performed by applying a scaled Givens rotation to the channel matrix. The application of the scaled Givens rotation operator eliminates any square root operations that would be performed in a standard QR factorization.Type: ApplicationFiled: June 30, 2009Publication date: December 30, 2010Applicant: Hong Kong Applied Science and Technology Research Institute Co., Ltd.Inventor: Chris Leung
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Publication number: 20100329379Abstract: A method of estimating channel conditions for use in a MIMO communication system includes the steps of, at a receiver: computing a SINR metric for all pre-coding matrices; computing a first capacity metric for the bandwidth from the SINR metrics, and selecting a rank which maximizes the first capacity metric; computing a second capacity metric for each frequency channel from the SINR metrics and the selected rank, and selecting one or more pre-coding matrices which maximize the second capacity metric; computing a third capacity metric from the second capacity metric, selected rank and selected pre-coding matrices for each transmission layer within each frequency channel, and selecting one or more frequency channels which maximize the third capacity metric; and transmitting the selected rank, selected pre-coding matrices and selected frequency channels to the transmitter for use in subsequent data transmissions.Type: ApplicationFiled: January 30, 2009Publication date: December 30, 2010Applicant: NEC CORPORATIONInventors: Duong Pham, Chaitanya Rao, Thirukkumaran Sivahumaran
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Publication number: 20100329380Abstract: There is provided a human body communication method and system using a frequency-selective baseband in order to transmit and receive data between communication devices that are coupled to a human body by using the human body as a communication channel. The human body communication method and system may be useful to maximize an efficiency of the frequency-selective spreading technology to enhance a processing gain of the Walsh code technology, and thus to reduce the interference between human bodies of users by adaptively selecting a frequency band of Walsh codes that are used for data communications according to the human body channel characteristics and the noise environments that are varied according to the ambient environments, and also construct a low-power and stable human body communication when there is a strong interference induced from other electronic equipments.Type: ApplicationFiled: January 30, 2009Publication date: December 30, 2010Applicant: Electronics and Telecommunications Research InstituteInventors: Tae-Wook Kang, In-Gi Lim, Sung-Weon Kang, Hyung-Il Park, Chang-Hee Hyoung, Jung-Hwan Hwang, Jin-Kyung Kim, Jung-Bum Kim, Sung-Eun Kim, Kyung-Soo Kim, Ki-Hyuk Park, Jae-Hoon Shim
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Publication number: 20100329381Abstract: Provided is a signal processing apparatus including an encoder for encoding, according to respective specific coding schemes, a first bit string formed from bit values at odd-numbered positions and a second bit string formed from bit values at even-numbered positions that are obtained by alternately extracting bit values from a bit string that is expressed by mutually different first and second bit values, and generating first and second encoded signals that do not include a DC component, and a signal generation unit for generating a multilevel signal by respectively adding, to a clock signal having larger amplitude than the first and second encoded signals that are generated by the encoder, the first encoded signal in synchronization with a timing of the clock signal being at a positive amplitude value and the second encoded signal in synchronization with a timing of the clock signal being at a negative amplitude value.Type: ApplicationFiled: May 20, 2010Publication date: December 30, 2010Applicant: Sony CorporationInventors: Tatsuo Shimizu, Takehiro Sugita
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Publication number: 20100329382Abstract: A digital broadcast transmitter to transmit a plurality of supplementary data streams is provided, including a multiplexer (MUX) unit which generates a transmission stream by inserting the plurality of supplementary data streams into a normal data stream so that the plurality of supplementary data streams are continuously arranged in an alternating pattern in the normal data stream, and an exciter unit which processes the transmission stream so that the plurality of supplementary data streams are distinguishably arranged in a plurality of areas forming a plurality of transmission units.Type: ApplicationFiled: June 30, 2008Publication date: December 30, 2010Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Jung-jin Kim, Hae-joo Jeong, Yong-sik Kwon, Eui-jun Park
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Publication number: 20100329383Abstract: A method of transmitting/receiving a signal and an apparatus for transmitting/receiving a signal are disclosed. The method of receiving a signal includes receiving signal frames temporally shifted via a plurality of radio frequency (RF) channels, demodulating one of the signal frames using first pilot signals and second pilot signals included in the signal frames and compensating for the channel of the demodulated signal frame and decoding service contents from the signal frame of which the channel is compensated for.Type: ApplicationFiled: July 14, 2008Publication date: December 30, 2010Inventors: Sang Chul Moon, Woo Suk Ko
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Publication number: 20100329384Abstract: A method of transmitting a wideband frame for a wideband system having backward compatibility with a narrowband system includes configuring a wideband carrier by using a set of base carriers, wherein a bandwidth of the base carriers corresponds to a bandwidth of the narrowband system and any one of center frequencies of the base carriers is the same as a center frequency of the narrowband system, and allocating all or some of guard subcarriers between the two adjacent base carriers to a traffic channel when a center frequency spacing between two adjacent base carriers is an integer multiple of a subcarrier spacing. Accordingly, the method can be used to support backward compatibility with the narrowband system. Further, the method can be equally used when the narrowband system co-exists with the wideband system in a guard band defined in a narrowband of a new system.Type: ApplicationFiled: September 22, 2008Publication date: December 30, 2010Applicant: LG Electronics Inc.Inventors: Jin Sam Kwak, Seung Hee Han, Min Seok Noh, Yeong Hyeon Kwon, Hyun Woo Lee, Dong Cheol Kim, Sung Ho Moon
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Publication number: 20100329385Abstract: When transmitting an RF signal for power supply or a pulse signal for data transmission, amplification is made in such a manner that the peak power of the RF signal becomes greater than the peak power of the pulse signal. Thus transmitting the RF signal with the greater peak power enables charging of a capacitor 23 of noncontact wireless communication equipment 2 even if the distance to the noncontact wireless communication equipment 2 is long.Type: ApplicationFiled: September 10, 2010Publication date: December 30, 2010Inventors: Noriharu Suematsu, Kouji Tsutsumi, Yasushi Sogabe, Toshihisa Kamemaru, Yoshihiko Konishi, Masataka Otsuka, Ryoji Hayashi, Akinori Taira
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Publication number: 20100329386Abstract: In a communication system, a precoder is coupled between first and second portions of each of a plurality of transmitters. The precoder is configured to receive an adaptive index representation of a scaled signal associated with the first portion of a first one of the transmitters, and to process the adaptive index representation using an adjusted precoder coefficient to generate a precompensation signal. The precompensation signal is supplied from the precoder to the second portion of a second one of the transmitters for use in precompensation of at least one signal to be transmitted by the second transmitter.Type: ApplicationFiled: December 17, 2009Publication date: December 30, 2010Inventor: Adriaan J. De Lind Van Wijngaarden
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Publication number: 20100329387Abstract: A wireless communication apparatus includes a transmission unit configured to convert an input signal into a transmission signal, and a correction unit configured to impart, to the input signal, characteristics opposite to group delay deviation derived from amplitude deviation of a reflective wave of the transmission signal reflected from a radio transmission filter, through which the transmission signal output from the transmission unit passes to arrive at an antenna.Type: ApplicationFiled: May 28, 2010Publication date: December 30, 2010Applicant: FUJITSU LIMITEDInventor: Shin WATANABE
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Publication number: 20100329388Abstract: A frequency synthesizer includes a distributed phase detector circuit, a multiple charge pump, a loop filter, a voltage-controlled oscillator and a dividing circuit. The distributed phase detector circuit delays an up signal and a down signal to generate a delayed up signal and a delayed down signal. The multiple charge pump generates a distributed current signal including a plurality of current pulse signals. Each of the current pulse signal is based on each bit of the delayed up signal and the delayed down signal. The loop filter filters the distributed current signal to generate a control voltage. The voltage-controlled oscillator generates an oscillation frequency signal based on the control voltage. The dividing circuit divides the oscillation frequency signal to generate a plurality of division frequency signals in response to a plurality of control signals, where the frequency signals are fedback to the distributed phase detector circuit.Type: ApplicationFiled: April 16, 2010Publication date: December 30, 2010Inventor: Sang-Soo KO
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Publication number: 20100329389Abstract: Orthogonal converters perform orthogonal conversion on the N time-series data extracted from a received radio signal. Multi-user detectors extract transmitted signals from respective transmission devices, from the time-series data which has been subjected to the orthogonal conversion. Inverse orthogonal converters perform inverse orthogonal conversion on the extracted transmitted signal. Rectangular filter circuits remove Mh time-series data at the front end and Mt time-series data at the rear end, from the transmitted signal which has been subjected to the inverse orthogonal conversion, so as to extract Nw time-series data. Deinterleaver circuits deinterleave the aforementioned time-series data. Decoders decode the time-series data for output.Type: ApplicationFiled: February 22, 2008Publication date: December 30, 2010Inventors: Koichi Ishihara, Yasushi Takatori, Syuji Kubota
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Publication number: 20100329390Abstract: A circuit that receives input signals from a transmitter via proximity communication, such as capacitively coupled proximity communication, is described. Because proximity communication may block DC content, the circuit may restore the DC content of input signals. In particular, a refresh circuit in the circuit may short inputs of the circuit to each other at least once per clock cycle (which sets a null value). Furthermore, a feedback circuit ensures that, if there is a signal transition in the input signals during a current clock cycle, it is passed through to an output node of the circuit. On the other hand, if there is no signal transition in the input signals during the current clock cycle, the feedback circuit may select the appropriate output value on the output node based on the output value during the immediately preceding clock cycle.Type: ApplicationFiled: June 30, 2009Publication date: December 30, 2010Applicant: SUN MICROSYSTEMS, INC.Inventors: Alex Chow, Robert J. Drost, Robert David Hopkins
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Publication number: 20100329391Abstract: Proposed are a highly reliable information detecting apparatus and an information detecting method.Type: ApplicationFiled: April 28, 2010Publication date: December 30, 2010Inventors: Hirotoshi Fukuda, Junichi Iida, Masato Sano, Toshinori Arai
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Publication number: 20100329392Abstract: A method and apparatus is disclosed to compensate for an in-phase/quadrature phase (I/Q) imbalance in a communications receiver. The communications receiver may utilize information gained from observing one or more observational interferers to adjust one or more sequence parameters, such as gain and/or phase to provide some examples. The one or more observational interferers including one or more images outside of a desired frequency band of interest. The communications receiver provides one or more sequence parameter values to allow for real-time adjustment of the sequence parameters to compensate for the I/Q imbalances.Type: ApplicationFiled: August 4, 2009Publication date: December 30, 2010Applicant: Broadcom CorporationInventors: Henrik Jensen, Hooman Darabi
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Publication number: 20100329393Abstract: A transmitting device Fourier-transforms symbols in a transmission symbol sequence, maps the Fourier-transformed symbols to subcarriers, inverse-Fourier-transforms the mapped symbols, and transmits the inverse-Fourier-transformed symbols from multiple transmitting antennas. A receiving device Fourier-transforms received signals, extracts signal components mapped to the subcarriers, and estimates the symbols transmitted via the subcarriers by applying a QR decomposition algorithm to the extracted signal components. The receiving device obtains a unitary matrix QH such that the product of the unitary matrix QH, a weight matrix W determining a correspondence between the transmission symbol sequence and the subcarriers, and a channel matrix H becomes a triangular matrix R, and estimates candidates of the symbols transmitted from the transmitting antennas based on the unitary matrix QH and the triangular matrix R.Type: ApplicationFiled: January 30, 2009Publication date: December 30, 2010Applicant: NTT DOCOMO, INC.Inventor: Kenichi Higuchi
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Publication number: 20100329394Abstract: Provided are an apparatus and a method for estimating I/Q unbalance parameters in an OFDM receiver. The apparatus includes an unbalance parameter estimator and an I/Q unbalance compensator. The unbalance parameter estimator estimates an amplitude difference and a phase difference depending on positions of pilot tones in a preamble of a received signal. The I/Q unbalance compensator compensates for an I/Q unbalance using the amplitude difference and the phase difference estimated by the unbalance parameter estimator.Type: ApplicationFiled: February 19, 2009Publication date: December 30, 2010Inventors: Jung-Hwa Bae, Sang-Min Bae
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Publication number: 20100329395Abstract: An apparatus and method for symbol decoding comprising selecting a degree of freedom (DOF) parameter for a noise vector; selecting a delta probability value; computing a cost function for a lattice point that is one of a discrete set of nominal codeword positions in a hypersphere; selecting a sphere decoding radius based on the DOF parameter, the delta probability value and the cost function; and decoding a symbol using the sphere decoding radius. And, the apparatus and method comprising setting pre-defined threshold probabilities; computing threshold radii based on the pre-defined threshold probabilities; setting an initial sphere radius square to the value of a first threshold radii; finding the Lattice point based on the initial sphere radius square; computing an updated sphere radius square as the minimum of either a cost function or a second threshold radii; and finding a next lattice point based on the updated sphere radius square.Type: ApplicationFiled: December 17, 2009Publication date: December 30, 2010Applicant: QUALCOMM INCORPORATEDInventors: Insung Kang, Byonghyo Shim
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Publication number: 20100329396Abstract: An interference detector receives a data stream including predetermined symbols that include a first data and a second data, between which is a frequency offset. The interference detector includes a correlation apparatus that generates a first correlation result and a second correlation result according to the data stream; a power searching unit, coupled to the correlation apparatus, that generates a first maximum correlation result and a first neighboring power according to the first correlation result, and generates a second maximum correlation result and a second neighboring power according to the second correlation result; and a determining unit, coupled to the power searching unit, that generates a determination result according to the first maximum correlation result, the first neighboring power, the second maximum correlation result and the second neighboring power to indicate existence of interferences.Type: ApplicationFiled: May 27, 2010Publication date: December 30, 2010Applicant: MStar Semiconductor, Inc.Inventors: Kai-Wen Cheng, Ko-Yin Lai, Yi-Ying Liao, Tai-Lai Tung
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Publication number: 20100329397Abstract: The present invention relates to a method and apparatus for estimating and compensating IQ imbalance of a baseband sampling digital communication receiver in digital time domain. Specifically, after an analog-to-digital converter (ADC) in the baseband sampling system, a structure including a crosstalk gain estimator, a Q-path gain estimator, an IQ imbalance compensator, and a lock detector is utilized to execute IQ imbalance estimation and compensation. In contrast to real-time frequency domain estimator/compensator, the present invention requires very little or no additional memory and delay processing, and therefore provides the estimation apparatus and method with convenience.Type: ApplicationFiled: June 18, 2010Publication date: December 30, 2010Inventor: Beom-jin Kim
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Publication number: 20100329398Abstract: To address the need for new interference cancellation techniques that are able to deliver adequate performance but with reduced processing requirements, various embodiments are described. In some embodiments, a receiving device demodulates and decodes (101) at least one first-group user from a multi-user input signal. This multi-user input signal includes at least one first-group user and at least one second-group user, the first-group users having a shorter transmission time interval (TTI) than the second-group users. The receiving device reconstructs (102) an interference signal for each of the first-group users that were successfully decoded and subtracts (103) each interference signal from the multi-user input signal to generate an interference-canceled signal. The receiving device then demodulates and decodes (104) at least one second-group user using this interference-canceled signal.Type: ApplicationFiled: June 30, 2009Publication date: December 30, 2010Inventors: Anil M. Rao, Henry Ye, Robert A. Soni
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Publication number: 20100329399Abstract: In a communication system, a postcoder is coupled between first and second portions of each of a plurality of receivers. The postcoder is configured to receive an adaptive index representation of a scaled signal associated with the first portion of a first one of the receivers, and to process the adaptive index representation using an adjusted postcoder coefficient to generate a postcompensation signal. The postcompensation signal is supplied by the postcoder to the second portion of a second one of the receivers for use in postcompensation of at least one signal received by the second receiver.Type: ApplicationFiled: December 17, 2009Publication date: December 30, 2010Inventor: Adriaan J. De Lind Van Wijngaarden
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ESTIMATING METHOD FOR MAXIMUM CHANNEL DELAY AND CYCLIC PREFIX (CP) AVERAGING METHOD IN OFDM RECEIVER
Publication number: 20100329400Abstract: An estimating method for maximum channel delay and cyclic prefix (CP) averaging method in orthogonal frequency division multiplexing (OFDM) receiver are described. Specifically, the estimating method performs the estimation of the maximum channel delay by adding the CP and the main OFDM signal for increasing the signal-to-noise ratio (SNR) and for reducing the inter-carrier interference (ICI). The CP averaging method is used to acquire a portion of the CP by using the maximum channel delay so as to increase the performance of the OFDM receiver.Type: ApplicationFiled: June 23, 2010Publication date: December 30, 2010Applicant: FCI INC.Inventor: Beom-Jin Kim -
Publication number: 20100329401Abstract: A method for controlling a combined waveform, representing a combination of at least two signals having orthogonal frequency multiplexed signal components, comprising: receiving information defining the at least two signals; transforming the information defining each signal to a representation having orthogonal frequency multiplexed signal components, such that at least one signal has at least two alternate representations of the same information, and combining the transformed information using the at least two alternate representations, in at least two different ways, to define respectively different combinations; analyzing the respectively different combinations with respect to at least one criterion; and outputting a respective combined waveform or information defining the waveform, representing a selected combination of the transformed information from each of the at least two signals selected based on the analysis.Type: ApplicationFiled: June 28, 2010Publication date: December 30, 2010Applicant: HYPRES, INC.Inventor: John David Terry
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Publication number: 20100329402Abstract: A multi-mode receiver includes a channel decomposition module (e.g., a Rake receiver) for separating a received signal into multipath components, an interference selector for selecting interfering paths and subchannels, a synthesizer for synthesizing interference signals from selected sub channel symbol estimates, and an interference canceller for cancelling selected interference in the received signal. At least one of the channel decomposition module, the synthesizer, and the interference canceller are configurable for processing multi-mode signals.Type: ApplicationFiled: August 30, 2010Publication date: December 30, 2010Applicant: RAMBUS INC.Inventors: Louis L. Scharf, Vijay Nagarajan, John K. Thomas
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Publication number: 20100329403Abstract: A system and method for closed loop clock correction includes adjusting two or more input signals comprising at least one in-phase clock and one quadrature clock, and applying adjusted quadrature clock signals to a device capable of generating a 4-quadrant interpolated output clock phase. An interpolated output clock phase is delayed to form a clock for a measurement device. Two or more adjusted input signals are measured on a measurement device over a range of interpolated output clock phases. Errors are determined on the in-phase clock and the quadrature clock using sampled information from the measurement device. The in-phase clock and the quadrature clock are adapted using determined error information.Type: ApplicationFiled: June 26, 2009Publication date: December 30, 2010Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Troy J. Beukema, Steven M. Clements, Chun-Ming Hsu, William R. Kelly, Elizabeth M. May, Sergey V. Rylov
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Publication number: 20100329404Abstract: A system for synchronizing clock, which is used to realize the synchronization between a radio frequency module and a base band module in a base station, comprises: one or more time generators, located on the radio frequency module side, configured to generate a synchronous signal according to an external clock signal, and to send the synchronous signal to a time distributor; the time distributor, located on the base band module side, configured to generate a synchronous clock according to a synchronous signal from one of the one or more time generators, and to adjust the synchronous clock according to a communication delay between the time generator which outputs the synchronous signal and the time distributor, and to send the synchronous clock adjusted to the radio frequency module and the base band module to realize the synchronization between the radio frequency module and the base band module.Type: ApplicationFiled: August 31, 2010Publication date: December 30, 2010Inventors: Jiying Xiang, Zongan Li
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Publication number: 20100329405Abstract: A DMB-T receiver supports a single carrier (SC) form of modulation and a multi-carrier form of modulation such as orthogonal frequency division multiplexing (OFDM). Upon receiving a broadcast signal, the DMB-T receiver downconverts the received broadcast signal to a received base-band signal and determines frame timing synchronization from the received signal as a function of frame header mode 1 and frame header mode 3 by correlating groups of received symbols spaced at least two signal frames apart within a sample shift value in a range of plus or minus one.Type: ApplicationFiled: July 23, 2008Publication date: December 30, 2010Applicant: Thomson Licensing, LLCInventors: Hou-shin Chen, Wen Gao
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Publication number: 20100329406Abstract: An isotope production system that includes a cyclotron having a magnet yoke that surrounds an acceleration chamber. The cyclotron is configured to direct a particle beam from the acceleration chamber through the magnet yoke. The isotope production system also includes a target system that is located proximate to the magnet yoke. The target system is configured to hold a target material and includes a radiation shield that extends between the magnet yoke and the target location. The radiation shield is sized and shaped to attenuate gamma rays emitted from the target material toward the magnet yoke. The isotope production system also includes a beam passage that extends from the acceleration chamber to the target location. The beam passage is at least partially formed by the magnet yoke and the radiation shield of the target system.Type: ApplicationFiled: June 26, 2009Publication date: December 30, 2010Applicant: GENERAL ELECTRIC COMPANYInventors: JONAS NORLING, TOMAS ERICKSSON
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Publication number: 20100329407Abstract: Disclosed is a device comprising a chamber enclosed by walls about a central axis. The chamber has an inner radius and an outer radius relative to the central axis and is configured to magnetically contain a core plasma. The device is further comprised of a divertor plate configured for receiving exhaust heat. The divertor plate has a divertor radius relative to the central axis. The divertor radius is greater than or equal to the sum of a plasma minor radius and a major radius of the peak point closest to the corresponding divertor plate. The device can be used for containing a fusion plasma, as a compact fusion neutron source, or as a compact fusion energy source. Methods of exhausting heat from such a device when plasma is present therein are also described. This abstract is intended for use as a scanning tool only and is not intended to be limiting.Type: ApplicationFiled: June 25, 2010Publication date: December 30, 2010Inventors: Michael T. Kotschenreuther, Prashant M. Valanju, Swadesh M. Mahajan
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Publication number: 20100329408Abstract: A system includes a first platform movably mounted to a first rail assembly, a second rail assembly coupled to and supported by the first platform, and a second platform movably mounted to the second rail assembly. At least one articulating arm is coupled to the second platform, and a gripping and cutting apparatus is coupled to and supported by the at least one articulating arm. An apparatus includes first and second gripping mechanisms each configured for selective actuation between positions for gripping and releasing an object, and a cutting mechanism positioned generally between the first and second gripping mechanisms, and configured to cut the object when gripped on either side by the gripping mechanisms. The system and apparatus can be used to remove feeder pipes of a nuclear reactor power plant.Type: ApplicationFiled: June 24, 2010Publication date: December 30, 2010Inventors: Sergey Fiodorov, Radomir Radivojcevic, Mark Zimny, Paul Linzender, Narinder Bains, David Morikawa
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Publication number: 20100329409Abstract: A drain sump of a reactor containment vessel having a containment vessel floor down below a reactor pressure vessel, and includes a heat-proof sump cover and two or more drain flow paths. The drain sump is arranged inside the containment vessel floor. The heat-proof sump cover has a thickness, and covers an upper part of the drain sump. The thickness allows a top surface of the sump cover to lie in the same surface as a top surface of the containment vessel floor. The drain flow paths pass through the sump cover in a thickness direction to flow water therethrough and solidify a molten corium therein. The molten corium is produced in the unlikely event of a severe accident.Type: ApplicationFiled: June 23, 2010Publication date: December 30, 2010Inventors: Makoto AKINAGA, Hiromasa Yanagisawa, Hirohide Oikawa, Ryoichi Hamazaki
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Publication number: 20100329410Abstract: Disclosed is a basket 50 that is located within a basket containment vessel, into which a boric acid solution capable of dissolving a pH adjuster flows, and can allow a pH adjuster solution to flow out by the inflowing boric acid solution. The basket 50 includes a plurality of containment units 71 stacked in a vertical direction with a predetermined first space L1 therebetween. The pH adjuster can be stored in each of the containment units 71. Also disclosed is a pH adjusting device including the basket 50, the basket containment vessel in which the basket 50 can be contained and in which cooling water can be stored, and an overflow pipe that, within the basket containment vessel, allows the pH adjuster solution that is obtained from the pH adjuster dissolved in the cooling water to flow out.Type: ApplicationFiled: April 8, 2009Publication date: December 30, 2010Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Koichi Tanimoto, Masaharu Watabe, Jiro Kasahara
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Publication number: 20100329411Abstract: A dynamic port that extends from the bottom wall of an oil reservoir that surrounds the lower guide bearing of a reactor coolant pump and is in fluid communication within an oil level gauge. The dynamic port is rotatable into and out of the oil flow path to adjust the dynamic oil level shown by the oil level gauge when the pump is at operating speed to be substantially equal to the static oil level when the motor is at rest.Type: ApplicationFiled: June 29, 2009Publication date: December 30, 2010Applicant: Westinghouse Electric Company, LLCInventors: David R. Brady, Christopher Snodgrass, Thomas G. Loebig
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Publication number: 20100329412Abstract: An embodiment of the present invention takes the form of a system that may reduce the level of flow-induced vibration (FIV) experienced by a jet pump assembly or other similar object within a pressure vessel. Essentially, an embodiment of the present invention may reduce the slip-joint leakage, which may be a cause of the FIVs, by adding a flow-limiting component to an outlet of the slip joint. This component may take the form of a collar, channel, and/or other component that may be connectable to a component of the jet pump assembly. After installation, an embodiment of the present invention may lower the amplitude of, and/or change the frequency of, the FIVs experienced by the jet pump assembly.Type: ApplicationFiled: June 30, 2009Publication date: December 30, 2010Inventors: Phillip G. Ellison, John R. Bass
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Publication number: 20100329413Abstract: The present subject matter relates to compact, non-synchrotron microbeam radiation therapy (MRT) systems and methods for cancer research and treatment based on a carbon nanotube distributed x-ray source array technology. The systems and methods can deliver microscopically discrete x-ray radiation at peak dose rate of 10 Gy per second or higher. The x-ray radiation can be provided by a spatially distributed x-ray source array. The technology can be used, for example and without limitation, for human cancer treatment, for intra-operative radiation therapy, and for pre-clinical cancer research on animal cancer models.Type: ApplicationFiled: January 15, 2010Publication date: December 30, 2010Inventors: Otto Z. Zhou, Sha X. Chang
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Publication number: 20100329414Abstract: Radiation therapy of a lesion in a part of a patient is carried out by maintaining the patient on a patient support table in fixed position using an immobilization device while the table is rotated between a magnetic resonance imaging system, a CT imaging system for generating a 360 degree scanned image of the patient at the location of the lesion and the radiation therapy system for generating a beam of radiation for treatment of the lesion and for scanning the beam 360 degrees around the lesion. The MR image locates the lesion and the CT system is used to calculate the treatment. Registration between the MR image, the CT image and the radiation treatment is provided by the fixed position of the part of the patient on the table which is held fixed using an immobilization system suitable for the part concerned which may include a molded head mask where the head is involved.Type: ApplicationFiled: June 2, 2010Publication date: December 30, 2010Inventors: Haoqin Zhu, Labros Petropoulos, Alexander Shvartsberg
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Publication number: 20100329415Abstract: A method of inspecting a quality of a blade, especially of a wind-turbine-blade, is provided. At least parts of the blade are inspected by a computer-tomography-method using radiation. The radiation is directed through the blade for the inspection. A transmitter sends the radiation through the blade. A receiver receives the sent radiation after its passing through the blade. The position of the transmitter, of the receiver and/or of the blade is changed in relation to each other in order to perform the inspection of the blade.Type: ApplicationFiled: June 15, 2010Publication date: December 30, 2010Inventors: Henrik Stiesdal, Erik Wolf