摘要:
An error correction encoder (10) includes an interleaver circuit (31), encoding circuits (32 1 , 32 2 ) and a deinterleaver circuit (33). The interleaver circuit (31) generates, in a standard speed mode, a single series of yet-to-be-coded bit sequences (IL 1 ) 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 1 , IL 2 ) 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 (32 1 , 32 2 ) apply error-correction coding to either the single series of yet-to-be-coded bit sequences (IL 1 ) or the two series of yet-to-be-coded bit sequences (IL 1 , IL 2 ).
摘要翻译:纠错编码器(10)包括交织器电路(31),编码电路(321,322)和解交织器电路(33)。 交织器电路(31)在标准速度模式下,基于在C列中以C列间隔排列的多列中的比特来生成单个系列的待编码比特序列(IL1) 并且在2倍速模式下,基于以一定间隔排列的多列的比特,生成2个系列的未编码比特序列(IL1,IL2) C / 2列在两个系列传输帧中的每一个中。 编码电路(321,322)将纠错编码应用于单个未编码比特序列(IL1)或两个未编码比特序列(IL1,IL2)序列, 。
摘要:
A Sum-product decoder 17 carries out soft-decision iterative decoding on a received signal s'(t) received by a signal receiving unit 12 by using an extended check matrix H d which is a combination of a matrix D in which differential modulation by a differential modulator 3 is replaced by a check matrix and a check matrix H for error correcting codes to carry out error correction decoding on an information sequence b i .
摘要:
An input bit error ratio estimating method executed by a communication control unit includes a computing step (ST1), a condition determining step (ST2), a first input BER estimating step (ST3), a second input BER estimating step (ST4), a third input BER estimating step (ST5), and an input BER estimation result outputting step (ST6). In the condition determining step (ST2), the communication control unit determines which of a plurality of conditions (A to C) set in advance to be narrowed down to one has been established, based on a post-internal decoding residual error detection ratio (D r ). Based on the condition that is determined in the condition determining step (ST2) as one that has been established, the communication control unit selects one out of a plurality of processing procedures for estimating the input BER, namely, processing of the step (ST3) to processing of the step (ST5), and executes the selected processing.
摘要:
A processing of preparing a regular quasi-cyclic matrix in which cyclic permutation matrices are arranged in row and column directions and specific regularity is given to the cyclic permutation matrices, deriving conditional expressions for assuring a predetermined minimum loop in the parity check matrix to be finally generated, and generating a mask matrix for converting a specific cyclic permutation matrix into a zero-matrix based on the conditional expressions and a predetermined weight distribution, a processing of converting the specific cyclic permutation matrix in the regular quasi-cyclic matrix into the zero-matrix using the mask matrix to generate an irregular masking quasi-cyclic matrix, and a processing of generating an irregular parity check matrix with an LDGM structure in which the masking quasi-cyclic matrix, and a matrix in which the cyclic permutation matrices are arranged in a staircase manner are arranged in a predetermined location are performed.
摘要:
A receiver, a transmitter, and a communication method, which exhibit performance close to that of synchronous detection even when a phase slip occurs, are obtained. Provided are a transmitter (10) for transmitting a transmission signal subjected to modulation after error correction coding and a receiver (20) including a phase compensation unit (21, 22) for receiving the transmission signal and performing demodulation therefor while maintaining synchronization thereof and an error correction decoding unit (23 to 25) for performing decoding processing for received data that has been subjected to the demodulation. The transmitter transmits a signal formed of a plurality of pilot sequences as a part of the transmission signal, and the receiver has a phase slip estimation processing function for estimating the phase slip by the phase compensation unit by using the plurality of pilot sequences, and for estimating a phase difference component by the error correction decoding unit, to thereby correct a phase of the received data.
摘要:
Provided is an error correction encoder that performs coding on both a transmission area and a redundancy area of the transmission frame by using a product code, and when excess or deficiency is arisen with respect to allocation of an information sequence area and/or a parity sequence area in a product code frame generated by the coding using the product code, non-uniformly allocate the information sequence area to the parity sequence area, and/or non-uniformly allocate the parity sequence area to the information sequence area, where each of the non-uniform allocations is performed in accordance with the arisen excess or deficiency.
摘要:
An error correction method and device as well as a communication system using them are obtained in which an LDPC code generation method capable of adjusting an code rate of an LDPC code in a variable manner while leaving the length of the code constant, is achieved by the use of an efficient encoding method or means supporting a variable code rate, so that the code rate of the LDPC code can be adjusted without changing the code length. An error correction method according to this invention is provided with a row splitting step (S3) to split each of a part or all of rows into two or more rows based on one parity check matrix, and a code construction step to construct a plurality of LDPC codes with arbitrary code rates, respectively.
摘要:
An apparatus control device (3) is configured to include an observed value acquiring unit (11) that acquires, from a sensor (2-n) (n=1, ..., N) that observes an environment in which a control target apparatus is installed, an observed value of the environment, an observation predicted value acquiring unit (12) that gives an observed value acquired by the observed value acquiring unit (11) to a first learning model (12a) and acquires an observation predicted value that is a future observed value from the sensor (2-n) from the first learning model (12a), and an unobservable value acquiring unit (13) that gives an observed value acquired by the observed value acquiring unit (11) to a second learning model (13a) and acquires an unobservable value that is a value not directly observed by the sensor (2-n) from the second learning model (13a). In addition, the apparatus control device (3) includes a control value calculating unit (14) that calculates a control value of the control target apparatus using the observed value acquired by the observed value acquiring unit (11), the observation predicted value acquired by the observation predicted value acquiring unit (12), and the unobservable value acquired by the unobservable value acquiring unit (13).