Patent
Iterated soft-decision decoding of block codes
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TLDR
In this paper, cyclic shifting of codewords is applied in the context of iterative soft decision-in soft decision out decoding to maximize the usefulness of a parity equation corresponding to any particular codeword bit.Abstract:
Systems and methods for augmenting the performance of iterative soft decision-in soft decision-out decoding of block codes with extrinsic information based on multiple parity equations inherent to the block codes. Cyclic shifting of codewords may be applied in the context of iterative soft decision-in soft decision-out decoding to maximize the usefulness of a parity equation corresponding to any particular codeword bit. Soft decisions are determined on a bit-by-bit basis in response to multi-bit symbol measurements. This allows the use of relatively inexpensive bit-based decoders for decoding of multi-bit symbols.read more
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References
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Journal ArticleDOI
Iterative decoding of binary block and convolutional codes
TL;DR: Using log-likelihood algebra, it is shown that any decoder can be used which accepts soft inputs-including a priori values-and delivers soft outputs that can be split into three terms: the soft channel and aPriori inputs, and the extrinsic value.
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Error-correction coding method with at least two systematic convolutional codings in parallel, corresponding iterative decoding method, decoding module and decoder
TL;DR: In this article, an error correction method for the coding of source digital data elements to be transmitted or broadcast, notably in the presence of high transmission noise, was proposed, the method comprising at least two independent steps of systematic convolutional coding, each of the coding steps taking account of all of the source data elements, and a corresponding iterative decoding method using, for the decoding, at each iteration, an intermediate data element obtained by the combination of the received data element with a data element estimated during the previous iteration.
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TL;DR: In this paper, the transmitted bits are coded according to the product of at least two systematic block codes, and an iterative decoding is applied in order to determine, at each code word search step, a data matrix and a decision matrix which are used for the following step.
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TL;DR: In this article, the authors proposed a method for the joint detection of multiple coded digital signals that share the same transmission medium in a manner that causes mutual interference, consisting of two steps that are applied to preliminary estimates of each digital signal, one or more times.