Sony Corporation

Sony Semiconductor Solutions Corporation

Masashi Shinagawa

Makoto Noda

Hiroyuki Yamagishi

Keitarou Kondou

Makoto Nada

A present technology relates to a transmission device, a transmission method, a reception device, a reception method, and a program that can improve reception performance of a frame to which a preamble is added. A transmission device of one aspect of the present technology generates a preamble including a sequence [d d . . . d &#x2212;d] having iteration of a sequence d that is one of sequences a and b that are Golay complementary sequences, followed by an inverted sequence of the sequence d, and including a signal sequence in which a maximum value of an absolute value of a side lobe level of cross correlation between a sequence [d d &#x2212;d] and a sequence [d &#x2212;d] is 25 or less. The generated preamble is added to data to be transmitted in units of frames. The present technology can be applied to a device that transmits and receives data via a wireless transmission path.

Transmission device, transmission method, reception device, reception method, and program

The present technology relates to a receiver, a frame synchronization method, a transmitter, a transmission method, and a program that allows for enhancing frame synchronization performance without reducing throughput. A receiver of an aspect of the present technology receives signals of a frame having a preamble including a frame detection signal sequence formed by a repetition of a known signal sequence, followed by a frame synchronization signal sequence formed by the known signal sequence or an inverse sequence thereof, performs convolution arithmetic operation of a known correlation sequence and cross-correlation between a received signal sequence and the frame synchronization signal sequence, and ensures synchronization of the frame while regarding predetermined time when a value more than or equal to a threshold value or a maximum value is obtained. The present technology can be applied to a device that transmits and receives data.

Receiver, frame synchronization method, transmitter, transmission method, and program

The present invention relates to a device and a method for transmission, a device and a method for reception, and a program that make it possible to obtain an undetected error probability characteristic close to a limit value in a system using a CRC for a plurality of pieces of data having different code lengths. A generator polynomial for header data which generator polynomial is used when a CRC coding process is performed on header data and a generator polynomial for sub-header data which generator polynomial is used when the CRC coding process is performed on sub-header data are set in a transmitting device. The transmitting device selects a generator polynomial according to data set as an object of the CRC coding process.

Device and method for transmission, device and method for reception, and program

Disclosed herein is a CRC generator polynomial select method for selecting a generator polynomial to be used in CRC coding and code checking, the method may include a first process of finding largest minimum Hamming distances Max.dof codes generated from given polynomials; a second process of finding code lengths n for codes having the largest minimum Hamming distances Max.dand determining a range n(r, Max.d)&#x2266;n&#x2266;n(r, Max.d); a third process of searching all polynomials for specific polynomials generating codes having d=Max.din the determined range; and a fourth process of selecting final generator polynomials having a smallest non-zero coefficient count and a lowest code undetected-error probability from the specific polynomials.

CRC generator polynomial select method, CRC coding method and CRC coding circuit

A transmission apparatus includes: a CRC encoding processing unit configured to include a plurality of generating polynomials for an CRC encoding processing with each of a plurality of data of which the code lengths differ as a target, and employ the optimal generating polynomial out of the plurality of generating polynomials to perform the CRC encoding processing; and a transmission unit configured to transmit data obtained by the CRC encoding processing unit performing the CRC encoding processing.

Transmission apparatus and method, reception apparatus and method, and program

In the present application, there is provided a decoding apparatus for decoding low density parity check codes, including: a plurality of storage sections configured to store logarithmic likelihood ratios or logarithmic posteriori probability ratios for one codeword into addresses thereof which are independent of each other thereamong; and a readout section configured to simultaneously read out, from among the logarithmic likelihood ratios or logarithmic posteriori probability ratios for the one codeword stored in the storage sections, a plurality of ones of the logarithmic likelihood ratios or logarithmic posteriori probability ratios which correspond to non-zero value elements in a predetermined one row of the check matrix used in a coding process of the low density parity check codes.

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Tokyo, Japan

Masashi Shinagawa