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Your search keyword '"Chen, Chengguan"' showing total 3 results
Start Over Author "Chen, Chengguan" Topic polar code
3 results on '"Chen, Chengguan"'

1. Pipelined BP Polar Decoder with a Novel Updated Scheme

Author

Zhang, Xiaojun, Li, Na, Li, Jun, Chen, Chengguan, Li, Hengzhong, Chen, Geng, Akan, Ozgur, Editorial Board Member, Bellavista, Paolo, Editorial Board Member, Cao, Jiannong, Editorial Board Member, Coulson, Geoffrey, Editorial Board Member, Dressler, Falko, Editorial Board Member, Ferrari, Domenico, Editorial Board Member, Gerla, Mario, Editorial Board Member, Kobayashi, Hisashi, Editorial Board Member, Palazzo, Sergio, Editorial Board Member, Sahni, Sartaj, Editorial Board Member, Shen, Xuemin (Sherman), Editorial Board Member, Stan, Mircea, Editorial Board Member, Jia, Xiaohua, Editorial Board Member, Zomaya, Albert Y., Editorial Board Member, Wu, Qihui, editor, Zhao, Kanglian, editor, and Ding, Xiaojin, editor

Published
2021
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2. Pipelined BP Polar Decoder with a Novel Updated Scheme

Author

Xiaojun Zhang, Li Na, Li Hengzhong, Jun Li, Chen Geng, and Chen Chengguan

Subjects
Very-large-scale integration, Scheme (programming language), Polar code, Computer science, Data_CODINGANDINFORMATIONTHEORY, Parallel computing, Throughput (business), computer, Decoder architecture, Decoding methods, computer.programming_language, Decoding latency, Scheduling (computing)
Abstract

Compared with the SC decoder, BP decoder provides a higher throughput and lower decoding latency for its inherent parallel nature. However, the functional units of existing BP decoders are not fully utilized. In this paper, we propose a new update scheduling scheme and hardware optimization design to improve the hardware efficiency of BP decoder. First, a pipelined decoder architecture is proposed to reduce the consumption of functional units. Then, a new update scheduling scheme is proposed, when updating the messages, both new-value and old-value approaches are used to improve the utilization of functional units and reduce the decoding latency. The analysis and synthesis results have shown that, compared with the existing methods, the proposed decoder suffers from a slight the decoding performance degradation, but the utilization rate of basic computational blocks (BCB) can be increased to 50.58%. The storage resource dissipation can be reduced by 20.1%–34.09%.

Published
2021

3. An Enhanced Belief Propagation Flipping Decoder for Polar Codes with Stepping Strategy.

Author

Zhang, Xiaojun, Liu, Yimeng, Chen, Chengguan, Guo, Hua, and Zeng, Qingtian

Subjects
ERROR rates, ALGORITHMS
Abstract

The Belief Propagation (BP) algorithm has the advantages of high-speed decoding and low latency. To improve the block error rate (BLER) performance of the BP-based algorithm, the BP flipping algorithm was proposed. However, the BP flipping algorithm attempts numerous useless flippings for improving the BLER performance. To reduce the number of decoding attempts needed without any loss of BLER performance, in this paper a metric is presented to evaluate the likelihood that the bits would correct the BP flipping decoding. Based on this, a BP-Step-Flipping (BPSF) algorithm is proposed which only traces the unreliable bits in the flip set (FS) to flip and skips over the reliable ones. In addition, a threshold β is applied when the magnitude of the log–likelihood ratio (LLR) is small, and an enhanced BPSF (EBPSF) algorithm is presented to lower the BLER. With the same FS, the proposed algorithm can reduce the average number of iterations efficiently. Numerical results show the average number of iterations for EBPSF-1 decreases by 77.5% when N = 256, compared with the BP bit-flip-1 (BPF-1) algorithm at E b / N 0 = 1.5 dB. [ABSTRACT FROM AUTHOR]

Published
2022
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