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Parallel multicode-rate convolutional code decoding method and realization device thereof

A convolutional code and multi-code-rate technology, applied in the field of parallel multi-code-rate convolutional code decoding method and its implementation device, can solve the problem that it is difficult to meet the requirements of high-speed and large-volume data processing

Inactive Publication Date: 2013-06-05
TSINGHUA UNIV
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Problems solved by technology

[0011] The traditional convolutional code decoder is proposed for single-channel serial data. Due to the limitation of devices and cost, it is difficult to meet the processing requirements of high-speed and large data volume.

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  • Parallel multicode-rate convolutional code decoding method and realization device thereof
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  • Parallel multicode-rate convolutional code decoding method and realization device thereof

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[0047] The specific embodiments of the present invention will be described in further detail below in conjunction with the drawings and embodiments. The following examples are used to illustrate the present invention, but not to limit the scope of the present invention.

[0048] The method of the embodiment of the present invention adopts the (2, 1, 7) convolutional code suggested by CCSDS (Consultative Committee for Space Data Systems) "Recommendation for Space Data System Standard-TM Synchronization and Channel Coding", The code rate is 1 / 2, and four code rates of 2 / 3, 3 / 4, 5 / 6, and 7 / 8 are obtained after puncturing. The basic block diagram of the basic 1 / 2 code rate (2, 1, 7) convolutional code is as follows figure 2 As shown, the generated vector is G1=1111001(171), G2=1011011(133), the constraint length is 7, and the symbol output by G2 is inverted, so its output symbol sequence can be defined as The functional block diagram of the four puncturing codes is as follows imag...

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Abstract

The invention discloses a parallel multicode-rate convolutional code decoding method and a realization device thereof. The parallel multicode-rate convolutional code decoding method comprises the following steps of: S1. receiving Nin paths of parallel input signals, and shifting the input signals under the effect of a shifting control signal and outputting the input signals, wherein output signals are also Nin paths of parallel signals, and the Nin is positive integers; S2. partially eliminating the phase ambiguity of the output signals; S3. taking the signals processed in the S2 as effectivedata, adding guard intervals for the effective data to assemble into a data frame, and taking the data frame as the input of a parallel convolutional code; S4. carrying out the convolutional decodingon the assembled data frame after being processed in the step S3; and S5. merging multipath outputs of the parallel convolutional decoding into one path and outputting in parallel. The invention provides the parallel multicode-rate convolutional code decoding method aiming at the defect that the throughput rate of the traditional convolutional decoding can not satisfy high-speed communication, improves the decoding throughput rate and the effective payload velocity by adopting a parallel partitioning processing technology, and can satisfy requirements of high-velocity information transmissioncommunication systems, such as satellite communication, and the like.

Description

Technical field [0001] The invention relates to the technical field of digital information transmission, in particular to a parallel multi-rate convolutional code decoding method and its implementation device. Background technique [0002] Convolutional code is a channel coding method often used in various communication systems such as digital television, satellite communications, and mobile communications. Since its introduction, the research on theory, performance and hardware implementation has been quite mature, and it has been widely used in various communication occasions due to its better performance and lower implementation complexity. However, with the development of science and technology, the transmission rate required by various communication systems is getting higher and higher. For example, the transmission rate of satellite communication will reach more than 1 Gbit / s. This also proposes a better performance for the convolutional code decoder. High demands. Take t...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M13/23
Inventor 张彧苏承毅万晓峰杨知行邱松
Owner TSINGHUA UNIV
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