Turbo decoding device and method compatible with two generations of dvb-rcs

Abstract

The invention discloses a turbo decoding device and method compatible with two generations of DVB‑RCS. The device of the invention includes sixteen modules: a rate matching module, two interleaving modules, a deinterleaving module, eight storage modules, and a data selection module. module, backward metric calculation module, external information calculation module, and hard decision module. The implementation steps of the method of the present invention: receive data flow; store information flow; set the maximum number of iterations; calculate the backward metric value of the first half round; calculate the log likelihood ratio information and extrinsic information of the first half round; store the extrinsic information of the first half round; Calculate the backward metric value of the second half round; calculate the log likelihood ratio information and extrinsic information of the second half round; store the extrinsic information of the second half round; decode the termination judgment; hard judgment. The invention realizes Turbo decoding for two generations of standards simultaneously in one decoding device, thereby reducing hardware resource consumption.

Description

technical field [0001] The present invention belongs to the field of wireless communication technology, and further relates to a turbo system compatible with the international digital video broadcast return channel DVB-RCS / RCS2 (Digital Video Broadcasting-Return Channel via Satellite / Return Channel via Satellite 2) standard in the field of channel coding technology. Decoding device and method. The present invention can be used for turbo code decoding stipulated by DVB-RCS / RCS2 standard. Background technique [0002] Digital Video Broadcasting-Return Channel System DVB-RCS (Digital Video Broadcasting-Return Channel via Satellite) standard is a multimedia satellite communication technology suitable for interactive requirements. It has been widely used since its release in 2003. Later, in order to obtain higher spectrum utilization and better error correction performance, DVB organization released the second generation digital video broadcast return channel system DVB-RCS2 sta...

AI Technical Summary

Problems solved by technology

The disadvantage of this decoder is that pre-decoding will lengthen the decoding time, and it can only be used for turbo code decoding in the first generation digital video broadcast return channel system

The disadvantage of this structure is that two component decoders are used in the basic decoding unit, and one of the two component decoders is always idle, thus wasting resources

[0006] With the update of the standard, the DVB-RCS2 standard uses a 16-state dual binary turbo decoder. The hardware overhead of independently implementing the turbo decoding device for the two generations of the standard is too large, and the existing decoder cannot meet the compatibility requirements of the two generations. standard requirements

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