Turbo decoding device and Turbo decoding method compatible with two generations of DVB-RCS

Abstract

The invention discloses a Turbo decoding device and a Turbo decoding method compatible with two generations of DVB-RCS. The device comprises 16 modules, namely, a rate matching module, two interleaving modules, a de-interleaving module, eight storage modules, a data selection module, a backward measure calculation module, an external information calculation module, and a hard decision module. The method comprises the steps of receiving a data flow, storing an information flow, setting the maximum number of iterations, calculating the backward measure value of a front half wheel, calculating the logarithmic likelihood ratio information and external information of the front half wheel, storing the external information of the front half wheel, calculating the backward measure value of a back half wheel, calculating the logarithmic likelihood ratio information and external information of the back half wheel, storing the external information of the back half wheel, making a decoding termination decision, and making a hard decision. Turbo decoding compatible with two generations of standards is completed in one decoding device, and the consumption of hardware resources is reduced.

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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