Duo-binary system CTC code translator

Abstract

The invention relates to a dual-binary CTC decoder, comprising a total input FIFO module (31)connected with an input, a total output FIFO module (32)connected with an output, a parallel cascade decodecore module (1)connected with the total input FIFO module via a decode data memory (35)on the input and connected with the total output FIFO module via a decode core module output FIFO (36)on the output, an input distribution module (33)for controlling the connection between the decode data memory and the total input FIFO module, and an output distributing module (34)for controlling the connection between the decode core module output FIFO and the total output FIFO module. The invention has expandable structure, which can increase decode core module number according to decode throughout, to realize high-speed decoding and meet IEEE standard.

Description

technical field

[0001] The invention relates to the field of mobile communication, in particular to a duobinary CTC (convolution turbo code) decoding device. Background technique

[0002] C.Berrou et al. in France proposed a coding scheme called Turbo code, which made people take a big step towards the limit of coding performance. Turbo code is a kind of concatenated code, which is formed by parallel concatenation of two convolutional codes. Each sub-encoder uses a feedback convolutional code encoder, and an interleaver is used between the sub-encoders to eliminate the correlation between sub-codes. At the same time, the decoding part of the Turbo code adopts the decoding algorithm of soft input and soft output and the method of iterative decoding, so that the sub-decoders can transfer information to each other and ensure the full utilization of the encoded information. The more irrelevant the two encoding output sequences are, the greater the amount of information exchang...

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