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Modified overlapped partly parallel decode for AR4JA codes in deep space communication 认领 引用
1
作者 李明 杨明川 +2 位作者 吕谷 李慧 郭庆 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2012年第5期123-128,共6页
In this paper, according to the AR4JA codes in deep space communication, two kinds of iterative decoding including partly parallel decoding and overlapped partly parallel decoding are analyzed, and the advantages and ... In this paper, according to the AR4JA codes in deep space communication, two kinds of iterative decoding including partly parallel decoding and overlapped partly parallel decoding are analyzed, and the advantages and disadvantages of them are listed. A modified overlapped partly parallel decoding that not only inherits the advantages of the two algorithms, but also overcomes the shortcomings of the two algorithms is proposed. The simulation results show that the three kinds of decoding have the same decoding performance; modified overlapped partly parallel decoding improves the iterative convergence rate and the throughput of system. 展开更多
关键词 deep space communication AR4JA codes modified overlapped partly parallel decoding
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Parallel Implementation of the CCSDS Turbo Decoder on GPU 认领 引用
2
作者 Liu Zhanxian Liu Rongke +3 位作者 Zhang Haijun Wang Ning Sun Lei Wang Jianquan 《China Communications》 SCIE CSCD 2024年第10期70-77,共8页
This paper presents a software turbo decoder on graphics processing units(GPU).Unlike previous works,the proposed decoding architecture for turbo codes mainly focuses on the Consultative Committee for Space Data Syste... This paper presents a software turbo decoder on graphics processing units(GPU).Unlike previous works,the proposed decoding architecture for turbo codes mainly focuses on the Consultative Committee for Space Data Systems(CCSDS)standard.However,the information frame lengths of the CCSDS turbo codes are not suitable for flexible sub-frame parallelism design.To mitigate this issue,we propose a padding method that inserts several bits before the information frame header.To obtain low-latency performance and high resource utilization,two-level intra-frame parallelisms and an efficient data structure are considered.The presented Max-Log-Map decoder can be adopted to decode the Long Term Evolution(LTE)turbo codes with only small modifications.The proposed CCSDS turbo decoder at 10 iterations on NVIDIA RTX3070 achieves about 150 Mbps and 50Mbps throughputs for the code rates 1/6 and 1/2,respectively. 展开更多
关键词 CCSDS CUDA GPU parallel decoding turbo codes
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A reordered first fit algorithm based novel storage scheme for parallel turbo decoder 认领 引用
3
作者 张乐 贺翔 +1 位作者 徐友云 罗汉文 《Journal of Shanghai University(English Edition)》 2007年第4期380-384,共5页
In this paper we discuss a novel storage scheme for simultaneous memory access in parallel turbo decoder. The new scheme employs vertex coloring in graph theory. Compared to a similar method that also uses unnatural o... In this paper we discuss a novel storage scheme for simultaneous memory access in parallel turbo decoder. The new scheme employs vertex coloring in graph theory. Compared to a similar method that also uses unnatural order in storage, our scheme requires 25 more memory blocks but allows a simpler configuration for variable sizes of code lengths that can be implemented on-chip. Experiment shows that for a moderate to high decoding throughput （40-100 Mbps）, the hardware cost is still affordable for 3GPP＇s （3rd generation partnership project） interleaver. 展开更多
关键词 turbo codes parallel turbo decoding interleaver vertex coloring reordered first fit algorithm （RFFA） fieldprogrammable gate array （FPGA）.
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APPLICATION OF TURBO CODES IN HIGH-SPEED REAL-TIME CHANNEL 认领 引用 被引量：1
4
作者 Zhao Danfeng Yue Li Yang Jianhua 《Journal of Electronics(China)》 2006年第4期602-605,共4页
The time delay of Turbo codes due to its iterative decoding is the main bottleneck of its application in real-time channel. However, the time delay can be greatly shortened through the adoption of parallel decod-ing a... The time delay of Turbo codes due to its iterative decoding is the main bottleneck of its application in real-time channel. However, the time delay can be greatly shortened through the adoption of parallel decod-ing algorithm, dividing the received bits into several sub-blocks and processing in parallel. This letter mainly discusses the applicability of turbo codes in high-speed real-time channel through the study of a parallel turbo decoding algorithm based on 3GPP-proposed turbo encoder and interleaver in various channel. Simulation re-sult shows that, by choosing an appropriate sub-block length, the time delay can be obviously shortened with-out degrading the performance and increasing hardware complexity, and furthermore indicates the applicability of Turbo codes in high-speed real-time channel. 展开更多
关键词 Turbo codes Block parallel decoding Real-time channel
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