Mitsubishi Electric Corporation

Mitsubishi Denki Kabushiki Kaisha

Sumitomo Light Metal Industries, Ltd.

Nissan Motor Company Limited

Other

Reynolds Metals Company

Nec Corporation

Honda Giken Kogyo Kabushiki Kaisha

Mitsubishi Denki K.k.

Lederle (japan), Ltd.

Kdd Submarine Cable Systems, Inc.

Hideo Yoshida

Yoshikuni Miyata

Kazuo Kubo

Takahiko Nakamura

Hachiro Fujita

Wataru Matsumoto

Kenji Ishii

Kenya Sugihara

Rui Sakai

Takashi Mizuochi

Yoshiaki Konishi

Takashi Sugihara

Yoshio Baba

Teruo Uno

Hidetoshi Uchida

Tsuyoshi Yoshida

Tohru Inoue

Atsuhiro Yamagishi

Takashi Kato

Katsuhiro Shimizu

Yasuyuki Sakai

Kiyoshi Onohara

Hiroshi Ichibangase

Toshio Tokita

Toshiyuki Kuze

J Daniel Bryant

Fernando Briz Del Blanco

Yoshiaki Oda

Toshihisa Nishijima

David Díaz Reigosa

Tokumichi Murakami

Tatsuya Kobayashi

Junichi Abe

Hidenori Taga

Minoru Ozaki

Michihiko Matsumoto

Shigeru Uchida

Tetsuya Aoki

Noboru Hayashi

Takashi Matsumoto

Kazuhiro Matsuzaki

Yukio Kodama

Yoshifusa Shoji

Tsutomu Furuyama

Kazuo Murakami

Keiichi Nishikawa

Kunihiro Yasunaga

Shinichi Matsuda

Takafumi Fujimori

Tadashi Minoda

Shinya Hirakuri

Kazuhisa Shibue

Ikuo Kishi

Kazushige Sawada

Tadami Yasuda

Eiichi Shibano

Robert M Ramage

Armand J Beaudoin

Hideo Itoh

Shinji Matsuda

Tsutomu Hattori

Masahito Katsukura

Kazuhide Ouchi

Mineo Asano

Yoshimasa Okubo

A transmission device includes an outer code interleaver that generates multiple bit sequences while performing interleaving on a signal formed of multiple multilevel modulation symbols on a per-bit basis, an outer coding unit that performs outer coding processings, in parallel, on the multiple respective bit sequences generated by the interleaving, an outer code deinterleaver that performs deinterleaving on bit sequences obtained by performing the outer coding processings, the deinterleaving being inverse operation of the interleaving performed by the outer code interleaver, an inner coding unit that performs inner coding processings, in parallel, on bit sequences obtained by performing the deinterleaving in the outer code deinterleaver, and an inner code interleaver that performs time interleaving and symbol interleaving on bit sequences obtained by performing the inner coding processings.

Transmission device, reception device, encoding method, and control circuit

An error correction coding apparatus that performs error correction coding using, as an error correction code sequence, a frame of m bits×n symbols input in m-bit parallel, where m and n are positive integers, includes: an error correction coding circuit that performs error correction coding using, as information bits, m bits×n symbols including known bits assigned to a bit sequence specified in the error correction code sequence and generate error correction coded parity bits; and a selector that replaces the known bits of the error correction code sequence with the parity bits.

Error correction coding apparatus and error correction decoding apparatus

A decoder that is a decoding apparatus includes an error-correction decoder that executes error correction decoding processing of iteratively performing decoding processing with a window size and the number of decoding iterations indicated by decoding parameters, on received data converted into a spatially coupled low-density parity-check code, and a decoding parameter control unit that updates the decoding parameters on the basis of a decoding result obtained by the iteratively executed decoding processing.

Decoding apparatus, control circuit, and storage medium

Provided is an optical transmission device including: a symbol demapping unit; a likelihood generation circuit configured to generate likelihoods relating to the reception signal; and an error correction decoding unit configured to execute soft decision decoding. The likelihood generation circuit includes: a first one-dimensional-modulation lookup table configured to input the signal of the I-axis component as an argument to output a first likelihood; a second one-dimensional-modulation lookup table configured to input the signal of the Q-axis component as an argument to output a second likelihood; and a two-dimensional-modulation lookup table configured to input, as an argument, the signal being the concatenation of the signal of the I-axis component and the signal of the Q-axis component, to generate a third likelihood. The error correction decoding unit is configured to execute the soft decision decoding based on the first likelihood, the second likelihood, and the third likelihood.

Optical transmission device and likelihood generation circuit

Provided is an error correction decoding device including an inner code iterative decoding circuit, a parameter generation circuit, and a first control circuit. The first control circuit is configured to: receive, as parameters, a threshold and a maximum iteration count which are generated by the parameter generation circuit; and compare, when an iteration count does not reach the maximum iteration count, a non-zero-value count sequentially output from the inner code iterative decoding circuit and the threshold set for each iteration count, and stop an iterative operation by the inner code iterative decoding circuit when a result of the comparison satisfies a stopping condition set in advance.

Error correcting decoding device and error correcting decoding method

A transmitter according to the disclosure includes: an encoding unit that generates a code word by performing coding with a low-density parity-check code using a check matrix, the encoding unit being capable of switching the check matrix for use in generating the code word, between a first check matrix with a first code rate and a second check matrix with a second code rate smaller than the first code rate, the first check matrix containing a plurality of cyclic permutation matrices, the encoding unit generating the second check matrix by masking the cyclic permutation matrix at a predetermined position in the first check matrix and adding a row with a column weight equal to or less than a threshold; and a transmission unit that transmits the code word.

Transmitter, receiver, communication system, method for changing code rate, control circuit and non-transitory storage medium

An electric vehicle including: a battery configured to store electric power; a motor electrically connected to the battery through a first wire; an external port connected to a second wire branched from the first wire, the external port being used for input/output of electric power from/to an external device; a converter provided between the external port and the first wire on the second wire; an electric generator provided on a third wire bypassing the converter from the second wire; a first switch provided on the third wire on the external port side relative to the electric generator; and a second switch provided on the third wire on an opposite side of the first switch relative to the electric generator. A method of controlling the electric vehicle, wherein in a case in which electric power generated by the electric generator is supplied to the external device, the first switch is turned OFF and the second switch is turned ON such that the electric power generated by the electric generator is supplied to the external device through the converter.

Method of controlling electric vehicle and electric vehicle system

In a coding device (), a first coding unit () generates a parity of an RS code by coding, based on the RS code, each first data sequence existing in a direction different from a row direction of input data, and generates coded data by attaching the parity of the RS code to each first data sequence, thereby consequently expanding a matrix. A second coding unit () generates a parity of a BCH code and a parity of an LDPC code by coding, based on the BCH code and the LDPC code, each second data sequence existing in a row direction of the coded data, and generates a plurality of DVB-S2 frames () including, per DVB-S2 frame (), one data sequence existing in the row direction of the coded data, the corresponding parity of the BCH code, and the corresponding parity of the LDPC code.

Coding device, transmitter, decoding device, and receiver

Provided is an optical transmission/reception device including an error correction decoding unit () for decoding a received sequence encoded with an LDPC code, in which the error correction decoding unit () is configured to perform decoding processing using a parity check matrix () of a spatially-coupled LDPC code, which includes a plurality of parity check sub-matrices () combined with each other, in which the decoding processing is windowed decoding processing that uses a window () over one or more parity check sub-matrices (), and in which a window size of the window () and a decoding iteration count due to throughput and requested correction performance are variable and input from a control circuit () connected to the error correction decoding device ().

Error correction decoding device and optical transmission/reception device

Provided is an error correction device including an encoding circuit configured to encode a plurality of error correction code sequences, in which the encoding circuit includes a plurality of encoding circuits connected in parallel, and is configured to execute encoding processing for the plurality of error correction code sequences through use of all the plurality of encoding circuits by adjusting an output bus width and a frequency of an operation clock with respect to a difference in transmission rate for any payloads input in one or more systems.

Error correction device and error correction method

Provided is a vehicle power source system including: a main battery configured to supply power to a drive motor of a vehicle; a fuel cell configured to supply power at least to the main battery; a main line connecting the main battery and the fuel cell; a first voltage translator placed on the main line and including a charging portion and a voltage transforming portion, the first voltage translator being configured to adjust an output voltage of the fuel cell; a relay provided between the charging portion and the fuel cell in the main line; and a sub-battery connected to an auxiliary machine power supply line via which power is supplied to an auxiliary machine of the vehicle or the fuel cell. The vehicle power source system includes a second voltage translator connected between the relay and the charging portion in the main line and configured to adjust power to be supplied from the sub-battery to the charging portion.

Vehicle power source system

An electric power adjustment system includes a fuel cell connected to a load, and a multi-phase converter connected between the fuel cell and the load. The multi-phase converter is constituted of a plurality of phases and converts an output voltage from the fuel cell by a predetermined required voltage ratio. The electric power adjustment system includes a ripple current characteristic switching unit configured to switch a ripple current characteristic with respect to an input current to the multi-phase converter by changing at least one of a drive phase number and the voltage ratio of the multi-phase converter according to an operation state of the fuel cell and a required electric power of the load.

Electric power adjustment system and control method for electric power adjustment system

An error correction encoder () includes an interleaver circuit (), encoding circuits () and a deinterleaver circuit (). The interleaver circuit () generates, in a standard speed mode, a single series of yet-to-be-coded bit sequences (IL) on the basis of the bits in plural columns that are arranged at an interval of C columns in a single series of transmission frames, and generates, in a two-times speed mode, two series of yet-to-be-coded bit sequences (IL, IL) on the basis of the bits in plural columns that are arranged at an interval of C/2 columns in each of two series of transmission frames. The encoding circuits () apply error-correction coding to either the single series of yet-to-be-coded bit sequences (IL) or the two series of yet-to-be-coded bit sequences (IL, IL).

Encoder device, decoder device and transmission apparatus

An error correction decoding apparatus includes column operatorsand row operatorstoprovided respectively in accordance with the columns and rows of a check matrix of an LDPC code. A received LLR (log-likelihood ratio) of a received sequence is input into the column operatorstogether with row LLRs from the row operatorsto, whereupon the column operatorscalculate a total value zof the received LLR of the received sequence and the row LLRs from the row operatorsto. The row operatorstohold operation results relating to row LLRs or column LLRs obtained during a previous operation, calculate column LLRs using the total value input from the column operatorsand the held operation results, calculate row LLRs from the calculated column LLRs, and output the calculated row LLRs to the column operators

Error correction decoding apparatus

Growing community of inventors

Tokyo, Japan

Hideo Yoshida