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Method and apparatus for perforating bit stream after Turbo encode

A bit stream, encoded technology, applied in the field of encoding, which can solve problems such as inability to decode correctly, single transmission without independent decoding capability, etc.

Active Publication Date: 2012-01-04
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, for this coding service with a coding rate of 1, it cannot be decoded correctly in the absence of noise, so a single transmission does not have independent decoding capability

Method used

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  • Method and apparatus for perforating bit stream after Turbo encode
  • Method and apparatus for perforating bit stream after Turbo encode
  • Method and apparatus for perforating bit stream after Turbo encode

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Embodiment Construction

[0013] Firstly, the method for puncturing a turbo-encoded bit stream according to an embodiment of the present invention will be described. The method is applicable to a scenario where the encoding rate of the turbo encoding and puncturing process is 1. like figure 1 shown, including:

[0014] Step S101: Perform a puncturing operation on the 1 / N rate Turbo encoded bit stream, wherein at least one bit in each bit combination is reserved, wherein each bit combination includes a systematic bit and a bit associated with the systematic bit The check bits, the systematic bits in different bit combinations are different from each other, and each of the systematic bits exists in different bit combinations. In addition, N in the 1 / N rate is a positive integer.

[0015] Before that, the Turbo encoder would perform 1 / N rate Turbo encoding on the input bitstream. Taking EGPRS2 DBS-12 as an example, assuming that the input bit stream is K bits, the Turbo encoder performs 1 / 3 rate Turbo...

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PUM

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Abstract

The invention provides a method for punching bit stream coded by Turbo, which is applied to the scene that the coding rate in the process of Turbo coding and punching is one. The method comprises the following steps: the bit stream coded by Turbo at a 1 / N speed is punched, wherein at least one bit in each bit combination is kept, each bit combination comprises one system bit and one check bit related to the system bit, the system bits in different bit combinations are different, and each system bit among all system bits is stored in the different bit combination; and all bits which are kept are outputted. The invention also provides a device for punching the bit stream coded by the Turbo. The method ensures the decoding accuracy under noise-free conditions, so that each transmission has the independent decoding capability.

Description

technical field [0001] The present invention relates to coding technology, in particular to the technology of punching the bit stream after turbo coding. Background technique [0002] The main process of the wireless data transmission transmitter includes: digitization and source coding --> channel coding --> interleaving --> burst formatting (shaping filter) --> encryption --> modulation. [0003] All codes for enhanced general packet radio service (GRPS, General Packet Radio Service) 2 (EGPRS2, Enhanced GPRS2) downlink reduced symbol period, high-order modulation and Turbo coding (REDHOT, REduced symbol Duration, Higher Order modulation and Turbocoding) In terms of business, the Turbo coding method is used in channel coding. In the specific processing process, after Turbo coding is performed on the bit stream, the Turbo coded bit stream will be punched. [0004] Taking REDHOT B modulation and coding scheme (DBS, Modulation and coding schemes for REDHOT B)-1...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M13/29H04L1/00
CPCH03M13/6362H03M13/2957
Inventor 吴德文梅竞晋谭斌
Owner HUAWEI TECH CO LTD
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