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

A decoding and iterative technology, applied in the direction of code conversion, error correction/detection by combining multiple code structures, encoding, etc., can solve the problem that the decoder cannot meet the compatible two-generation standards, the hardware overhead is large, and the decoding time is prolonged. and other problems to achieve the effect of reducing hardware resource consumption and overcoming excessive hardware overhead.

Active Publication Date: 2016-12-21
XIDIAN UNIV
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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 w

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

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[0058] The present invention will be further described below in conjunction with the accompanying drawings.

[0059] Refer to attached figure 1 , the device of the present invention includes sixteen modules: rate matching module, first interleaving module 1, second interleaving module 2, deinterleaving module, first storage module RAM1, second storage module RAM2, third Storage module RAM3, fourth storage module RAM4, fifth storage module RAM5, sixth storage module RAM6, seventh storage module RAM7, eighth storage module RAM8, data selection module, backward metric calculation module, external Information calculation module, hard decision module.

[0060] The rate matching module is used to perform zero padding operation on the received data stream, and the zero padding rule complies with the digital video broadcasting return channel system DVB-RCS / RCS2 standard.

[0061] The first interleaving module 1 is used to interleave the systematic bit information stream Ar1 and the ...

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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...

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Application Information

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IPC IPC(8): H03M13/29H03M13/27
CPCH03M13/2957H03M13/2771
Inventor 宫丰奎陈浩王勇张南秦利卿
Owner XIDIAN UNIV
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