陆地移动卫星信道中的LDPC码分析与优化

doi:10.3969/j.issn.1001-2400.2018.03.010

西安电子科技大学学报

陆地移动卫星信道中的LDPC码分析与优化

戴精科1;林开亮2

(1. 火箭军工程大学信息工程系，陕西西安 710025；
2. 西北农林科技大学理学院，陕西西安 712100)

收稿日期:2017-09-06 出版日期:2018-06-20 发布日期:2018-07-18
作者简介:戴精科(1984-)，男，讲师，E-mail: djk029@163.com
基金资助:
国家自然科学基金资助项目(61501469)；中国博士后科学基金资助项目(2015M572782)

Analysis and optimization of the LDPC code on the land mobile satellite channel

DAI Jingke1;LIN Kailiang2

(1. Information Engineering Department, Rocket Force Univ. of Engineering, Xi'an 710025, China;
2. School of Science, Northwest A&F Univ., Xi'an 712100, China)

Received:2017-09-06 Online:2018-06-20 Published:2018-07-18

摘要/Abstract

摘要：

针对移动环境中信号易受到信道衰落影响的问题，将低密度奇偶检验码应用于经历阴影-赖斯衰落的陆地移动卫星信道，证明了信道对称条件，给出了译码稳定性条件，推导了香农容量限; 基于密度进化理论获得译码门限，并结合差分进化算法对不规则码的度分布进行了优化．仿真结果表明，译码门限能够很好地预测码字性能，且优化的不规则码门限距离香农限仅有0.1dB; 在相同码长条件下，优化码的误码性能优于规则码和新一代数字卫星广播标准使用的码字，适合陆地移动卫星信道传输．

关键词: 低密度奇偶检验码, 阴影莱斯信道, 密度进化, 译码门限, 优化

Abstract:

The low-density parity-check (LDPC) code is applied to the land mobile satellite (LMS) channel with Shadowed-Rician fading, where both of symmetry and stability conditions are proven, and the Shannon limit is calculated. The decoding thresholds are obtained based on density evolution, and the degree distributions of irregular codes are optimized using differential evolution. Simulation results show that the thresholds well predict the code performance, and that the optimized code has a threshold within 0.1dB of the Shannon limit. With the same code-length, the optimized code outperforms both the regular code and irregular code employed by the Digital Video Broadcasting-Satellite-Second Generation (DVB-S2), indicating its advantage of information transmission over the LMS channel.

Key words: low density parity check codes, shadowed-Rician channel, density evolution, decoding threshold, optimization

戴精科;林开亮. 陆地移动卫星信道中的LDPC码分析与优化[J]. 西安电子科技大学学报, 2018, 45(3): 52-57.

DAI Jingke;LIN Kailiang. Analysis and optimization of the LDPC code on the land mobile satellite channel[J]. Journal of Xidian University, 2018, 45(3): 52-57.

参考文献

［1］ AL-SAEGH A M, SALI A, MANDEEP J S, et al. Channel Measurements, Characterization, and Modeling for Land Mobile Satellite Terminals in Tropical Regions at Ku-band ［J］. IEEE Transactions on Vehicular Technology, 2017, 66(2): 897-911.
［2］ LIU T, SUN B W, LI Z G, et al. Analysis of Channel Characteristics and Channel Model for Satellite Communication System［C］//Proceedings of the 2016 IEEE International Conference on Electronic Information and Communication Technology. Piscataway: IEEE, 2016: 166-169.
［3］ ARTI M K. Channel Estimation and Detection in Hybrid Satellite-terrestrial Communication Systems［J］. IEEE Transactions on Vehicular Technology, 2016, 65(7): 5764-5771.
［4］ LI J, LI Y B. Modeling Ka-band Satellite Communication System with MPSK［C］//Proceedings of the 2016 2nd IEEE International Conference on Computer and Communications. Piscataway: IEEE, 2016: 1785-1789.
［5］ RICHARDSON T J, SHOKROLLAHI M A, URBANKE R L. Design of Capacity-approaching Irregular Low-density Parity-check Codes［J］. IEEE Transactions on Information Theory, 2001, 47(2): 619-637.
［6］ HOU J, SIEGEL P H, MILSTEIN L B. Performance Analysis and Code Optimization of Low-density Parity-check Codes on Rayleigh Fading Channels［J］. IEEE Journal on Selected Areas in Communications, 2001, 19(5): 924-934.
［7］徐华, 徐澄圻. Rice信道下LDPC码密度进化的研究［J］. 电子与信息学报, 2006, 28(10): 1831-1836.
XU Hua, XU Chengqi. Research of Density Evolution of LDPC Codes over Rice Channels［J］. Journal of Electronics & Information Technology, 2006, 28(10): 1831-1836.
［8］ TAN B S, LI K H, TEH K C. Performance Analysis of LDPC Codes with Maximum-ratio Combining Cascaded with Selection Combining over Nakagami-m Fading［J］. IEEE Transactions on Wireless Communications, 2011, 10(6): 1886-1894.
［9］ LUTZ E. Modelling of the Land Mobile Satellite Communications Channel［C］//Proceedings of the 2013 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications. Piscataway: IEEE, 2013: 199-202.
［10］ ABDI A, LAU W C, ALOUINI M S, et al. A New Simple Model for Land Mobile Satellite Channels: First- and Second-order Statistics［J］. IEEE Transactions on Wireless Communications, 2003, 2(3): 519-528.
［11］ BAE H, KIM H, BAE K. Analysis of Noise Threshold of Regular LDPC Codes on LEO Satellite Channel ［C］//Proceedings of the 2008 23rd International Technical Conference on Circuits/Systems, Computers and Commnications. Piscataway: IEEE, 2008: 1289-1292.
［12］ ARTI M K. Performance Evaluation of Maximal Ratio Combining in Shadowed-Rician Fading Land Mobile Satellite Channels with Estimated Channel Gains［J］. IET Communications, 2015, 9(16): 2013-2022.
［13］ ARTI M K, JINDAL S K. OSTBC Transmission in Shadowed-Rician Land Mobile Satellite Links［J］. IEEE Transactions on Vehicular Technology, 2016, 65(7): 5771-5777.
［14］ DAI C Q, HUANG N N, CHEN Q B. Adaptive Transmission Scheme in Ka-band Satellite Communications［C］//Proceedings of the 2017 International Conference on Digital Signal Processing. Piscataway: IEEE, 2017: 336-340.
［15］ XIAO H, BANIHASHEMI A H. Improved Progressive-edge-growth(PEG) Construction of Irregular LDPC Codes［J］. IEEE Communications Letters, 2004, 8(12): 715-717.
［16］陈霖，冯大政. 一种快速的渐进边增长算法［J］. 西安电子科技大学学报. 2009, 36(3): 406-409.
CHEN Lin, FENG Dazheng. Fast Progressive Edge-growth Algorithm ［J］. Journal of Xidian University, 2009, 36(3): 406-409.

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陆地移动卫星信道中的LDPC码分析与优化

Analysis and optimization of the LDPC code on the land mobile satellite channel

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