Patent application number | Description | Published |
20100169745 | SOFT OUTPUT DECODER, ITERATIVE DECODER, AND SOFT DECISION VALUE CALCULATING METHOD - A soft output decoder capable of performing decoding with a small computational complexity necessary for likelihood calculation thereby to reduce the scale of the operation circuit and to shorten the processing delay time. The soft output decoder ( | 07-01-2010 |
20100198892 | PARALLEL RESIDUE ARITHMETIC OPERATION UNIT AND PARALLEL RESIDUE ARITHMETIC OPERATING METHOD - A parallel residue arithmetic operation unit is provided to make it possible to reduce processing delay, and to make an additional multiplier or a residue arithmetic circuit unnecessary, so that a circuit can become small in size. In the parallel residue arithmetic operation unit, a parallel CRC calculation circuit ( | 08-05-2010 |
20100205518 | RUNNING CYCLIC REDUNDANCY CHECK OVER CODING SEGMENTS - In order to allow early stopping of codeblock decoding iterations, a cyclic redundancy check (CRC) is attached to each codeblock segment that pertains to the same transport block carrying information bits. The CRC for segment k is calculated for all bits within segments | 08-12-2010 |
20140082455 | DECODING DEVICE - A decoding device has a decoding section that has a plurality of decoding cores which decode a received packet (e.g., likelihoods generated as a result of demodulation), which will become data to be decoded, in parallel on a per-likelihood basis and in which a first decoding core and a second decoding core of a plurality of decoding cores can perform decoding in parallel and a control section that controls decoding, wherein the decoding section lets the second decoding core decode a second likelihood when the second likelihood is input in the middle of the first decoding core decoding the first likelihood of the data to be decoded, whereby another likelihood can be decoded by use of another decoding core in the middle of decoding of a certain likelihood. Thus, entire decoding speed is increased. | 03-20-2014 |
20150222373 | RECEIVING DEVICE - A receiving device that receives a signal in a receiving antenna. The receiving device includes a gain controller that adjusts a gain in the receiving device in response to information related to power of the signal, and a signal detector that determines whether, within a predetermined period after the information related to the power of the signal exceeds a first threshold value, the information related to the power of the signal exceeds a second threshold value which is larger than the first threshold value. The gain controller adjusts a search range of the gain in the receiving device based on a determination result of the signal detector with respect to the information related to the power of the signal. | 08-06-2015 |
20150229330 | VARIABLE SHIFTER, DECODER, AND DATA SHIFTING METHOD - A variable shifter includes: a plurality of shifters that cyclically shift input data having a plurality of bits or cyclically shifted data; and a control unit that selects a shift amount for each of the plurality of shifters in accordance with a predetermined cyclic shift amount. The number of types of the predetermined cyclic shift amount is smaller than the number of bits in the input data, each shifter selects one of a plurality of shift amounts in accordance with the predetermined cyclic shift amount, and the plurality of shift amounts have a combination of shift amounts that differ from one shifter to another. | 08-13-2015 |
20150244071 | WIRELESS COMMUNICATION DEVICE AND DIRECTIVITY CONTROL METHOD - A wireless communication device includes a directivity control unit that sets a directivity for a plurality of antennas, a directivity switching unit that switches the directivity for the plurality of antennas, and a reception quality estimation unit that measures the reception quality of a received signal received by the plurality of antennas. The directivity control unit uses the reception quality of a received signal directed to another station among the received signals to set the directivity in a direction in which an influence of interference from the other station is reduced. | 08-27-2015 |
20150244475 | RADIO COMMUNICATION APPARATUS AND INTERFERENCE DETECTION METHOD - A radio communication apparatus includes a discrete Fourier transformer that performs a frequency-domain transform on each of a plurality of reception signals received at a plurality of receiver chains and generates a plurality of frequency-domain signals, a covariance matrix calculator that calculates covariance of the plurality of frequency-domain signals, a deviation calculator that calculates a cumulative value of covariance in a first frequency range and a second frequency range and calculates deviation of the covariance in the plurality of frequency ranges, and an adjacent-channel interference determiner that determines presence or absence of adjacent-channel interference using the cumulative value of the covariance. | 08-27-2015 |
20150244478 | RADIO COMMUNICATION DEVICE AND METHOD OF CONTROLLING DIRECTIVITY - A radio communication device includes: a directivity control unit that configures each of directivities of a plurality of antennas; a directivity switching unit that switches between the directivities of the antennas; a reception quality estimation unit that measures a reception quality of a received signal received by the antennas; and a block error estimation unit that estimates a block error in reception data which is obtained by decoding the received signal. In the case where a block error occurs continuously for a predetermined number of times or longer and an amount of decrease in the reception quality is lower than a predetermined value, the directivity control unit re-adjusts a directivity to decrease the block error, based on a result of the estimation of the block error and a result of the measurement of the reception quality, the re-adjusted directivity being one of the directivities of the antennas. | 08-27-2015 |
20150244546 | EQUALIZATION METHOD AND EQUALIZER - An equalization method includes carrying out frequency domain conversion of M received signals into a 2M received vector having 2M elements, carrying out channel estimation and noise/interference estimation based on the 2M vector, calculating a 2M channel vector and a (2M)×(2M) noise/interference matrix, selecting a 2M−1 or less channel vector from the calculated 2M channel vector, selecting a (2M−1)×(2M−1) or less noise/interference matrix from the calculated (2M)×(2M) noise/interference matrix, calculating a 2M−1 or less equalization coefficient vector as equalization coefficients based on the selected 2M−1 channel vector and the selected (2M−1)×(2M−1) noise/interference matrix, selecting a 2M−1 or less received vector from the 2M received vector, and equalizing the selected 2M−1 received vector by using the calculated equalization coefficients. | 08-27-2015 |