High-speed parallel RS decoding method for space communication

Abstract

The invention relates to a high-speed parallel Reed-Solomon (RS) decoding method for space communication. In the method, two decoding modules RS (255, 223) and RS (255, 239) are configured simultaneously, so that a decoder can configure decoding types on line according to coding parameters to flexibly adapt to two coding formats specified by the consultative committee for space data system (CCSDS) standard; input data is filled and acquired in first in first out (FIFO) by ping-pong operation during deinterlacing and interlacing, a multi-channel parallel pipeline mode is adopted during decoding, and a composite structure ensures the maximization of system performance and realizes the minimization of resources and is suitable for 1 to 8 arbitrary interlacing depths; and measures such as multi-channel parallel RS decoding, the optimization of realization logic of a finite field multiplier, and the like are adopted, so that decoding rate is greatly improved. The method can be directly applied to a high-code-rate remote sensing satellite ground receiving system and can further increase parallelism degree and improve performance when necessary by modular design.

Description

technical field [0001] The present invention relates to a high-speed decoding method of RS coding for space communication, which is mainly used in space communication ground channel decoders for high-speed RS decoding of demodulated data, correcting channel transmission errors, and can also be used for other applications direction of data demodulation in the receiving device. Background technique [0002] RS codes are a class of multi-ary BCH codes with strong error correction capabilities, and they are also a class of typical algebraic geometry codes. It was first constructed by Reed and Solomon in 1960 using MS polynomials. RS codes constructed with MS polynomials are non-systematic codes, but systematic codes can be generated using the BCH code construction method. Since the maximum possible minimum distance of a linear code is the number of parity elements plus 1, and the RS code just does this, the RS code is called a maximum minimum distance separable code (MDS code)...

AI Technical Summary

Problems solved by technology

Since the multiplier used in the current RS decoder has not been optimized, the working clock of the decoder cannot be too high

At the same time, due to the continuous increase in the code rate of remote sensing satellite data transmission, it is more difficult to further increase the code rate on the basis of compatibility with different RS coding formats and interleaving depths

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