• KSII Transactions on Internet and Information Systems
    Monthly Online Journal (eISSN: 1976-7277)

Performance Improvement of Iterative Demodulation and Decoding for Spatially Coupling Data Transmission by Joint Sparse Graph

Vol. 10, No.12, December 31, 2016
10.3837/tiis.2016.12.015, Download Paper (Free):

Abstract

Both low-density parity-check (LDPC) codes and the multiple access technique of spatially coupling data transmission (SCDT) can be expressed in bipartite graphs. To improve the performance of iterative demodulation and decoding for SCDT, a novel joint sparse graph (JSG) with SCDT and LDPC codes is constructed. Based on the JSG, an approach for iterative joint demodulation and decoding by belief propagation (BP) is presented as an exploration of the flooding schedule, and based on BP, density evolution equations are derived to analyze the performance of the iterative receiver. To accelerate the convergence speed and reduce the complexity of joint demodulation and decoding, a novel serial schedule is proposed. Numerical results show that the joint demodulation and decoding for SCDT based on JSG can significantly improve the system’s performance, while roughly half of the iterations can be saved by using the proposed serial schedule.


Statistics

Show / Hide Statistics

Statistics (Cumulative Counts from December 1st, 2015)
Multiple requests among the same browser session are counted as one view.
If you mouse over a chart, the values of data points will be shown.


Cite this article

[IEEE Style]
Zhengxuan Liu, Guixia Kang, Zhongwei Si and Ningbo Zhang, "Performance Improvement of Iterative Demodulation and Decoding for Spatially Coupling Data Transmission by Joint Sparse Graph," KSII Transactions on Internet and Information Systems, vol. 10, no. 12, pp. 5964-5984, 2016. DOI: 10.3837/tiis.2016.12.015

[ACM Style]
Liu, Z., Kang, G., Si, Z., and Zhang, N. 2016. Performance Improvement of Iterative Demodulation and Decoding for Spatially Coupling Data Transmission by Joint Sparse Graph. KSII Transactions on Internet and Information Systems, 10, 12, (2016), 5964-5984. DOI: 10.3837/tiis.2016.12.015