相关跳频序列的Viterbi译码算法及其纠错性能分析
Viterbi Algorithm for DFH Sequence and Analysis of Its Error-Correcting Performance
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摘要: 该文分析了相关跳频通信系统中频率转移函数的纠错性能,将Viterbi算法应用于接收端跳变频点序列的译码,并结合相关跳频转移函数的特点对译码过程作出了改进.针对满足最大相关纠错性能的频率转移函数,详细分析了Viterbi算法的译码性能.仿真结果表明,通过相关纠错,对随机错误在低信噪比条件下可以获得5-8dB的增益.Abstract: In this paper the error-correcting performance of frequency transition function for Differential Frequency Hopping （DFH） communication system is analyzed first. Then a Viterbi algorithm is proposed and applied to frequency sequence decoding of DFH receiver, and it is further improved by the full use of the characteristics of transition function. The decoding performance of Viterbi algorithm is analyzed with the requirement that the transition function should achieve the best error-correcting performance. Simulation results show that 5- 8dB gain could be achieved for stochastic frequency detection error when SNR is low.
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Herrick D L.[J].Lee P K. CHESS: A new reliable high speed HF radio[C]. Proc. MILCOM96, Washington, DC.1996,:-[2]Herrick D L, Lee P K, Ledlow L L. Correlated frequency hopping:an improved approach to HF spread spectrum communications[J].Proc. Tactical Communications Conference, Washington, DC,1996:319 - 324.[3][美]R.E布莱赫特著,肖先赐译.数字信号处理的快速算法[M].北京:科学出版社,1992:286-297.[4]杨爵,郎宗棪.实用纠错编码[M].北京:中国铁道出版社,1988:178-237.[5]Proakis J G. Digital Communications(3e)[M]. Boston: The McGraw-Hill Companies Inc., 2001:260 - 264, 470 - 511.[6]G. C.小克拉克,J.B.凯恩著,聂涛,卢玉明,等译.数字通信中的纠错编码[M].北京:国防工业出版社,1988:150-172,193-213.[7]李明,戚仁华,朱红琛.短波宽带快速跳频通信技术研究[J].通信技术,2000,3:34-37.[8]潘武,周世东,姚彦.差分跳频通信系统性能分析[J].电子学报,1999,27(11A):102-104. -
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