Output control method, device and decoding equipment of turbo iterative decoding

Abstract

The invention provides a Turbo iterative decoding output control method and device, and decoding equipment. The method comprises the steps of: in the ith iterative decoding process, obtaining a firsthard decision result according to the first output information of a first component decoder; in the ith iterative decoding process, obtaining a second hard decision result according to the second output information of a second component decoder; when the fact that the first hard decision result and the second hard decision result are equal is determined, performing CRC check of the first hard decision result or the second hard decision result; and, when the fact that the first hard decision result or the second hard decision result satisfies CRC check is determined, taking the checked first hard decision result or the checked second hard decision result as the decoding result, and outputting the decoding result. The possibility that iteration is stopped too early when the decoding result is converged can be reduced; on the premise that the decoding performance is ensured, the decoding delay of a Turbo code is shortened; and thus, the decoding efficiency is increased.

Description

technical field [0001] The invention relates to signal processing technology, in particular to an output control method, device and decoding equipment of Turbo iterative decoding. Background technique [0002] In modern communication systems, in order to ensure the reliable and effective transmission of various data in the channel, it is often necessary to use error correction coding technology. Especially with the development of wireless digital communication and the emergence of various high-speed and bursty services, higher and higher requirements are put forward for error-correcting code technology. Turbo codes have excellent error correction performance, and the performance is close to the Shannon limit. [0003] Turbo code adopts iterative decoding algorithm, and improves decoding reliability through soft information exchange between component decoders. Existing turbo code decoding methods use a preset maximum number of iterations to implement the decision to stop it...

AI Technical Summary

Problems solved by technology

[0004] Although the higher the number of iterations, the better the decoding performance, but the correspondingly longer decoding processing time will be required, and the decoding complexity will increase accordingly.

In addition, when a certain number of iterations is reached, the bit error rate will no longer decrease with the increase of the number of iterations, that is, it will reach the "bit error level". At this time, continuing to iterate will only increase the decoding delay in vain and reduce the decoding speed

The existing turbo code decoding method is not flexible enough to use in complex and changeable channel environments, and there is a problem of slow decoding speed

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