摘要
在水声通信中,由于通信系统的复杂度和系统能耗的限制,以及水声信道的不稳定性给水声通信的可靠性和高效性带来很大的挑战;采用联合信源信道编码算法可以实现可靠的水声通信;目前,在水声通信中较少涉及联合信源信道的算法;文中提出基于LZW(Lempel-Ziv&Welch)和RS(Reed-Solomon)编码的联合信源信道编码算法,对比分析了RS对信源进行均等保护编码性能;结合实际应用环境,LZW信源编码算法实现简单,而RS编码又能纠正连续的的突发错误,所以适合于信道可靠性不高的水声信道;仿真结果表明,在不增加设备复杂度和系统开销的情况下,此算法的无损压缩率为2∶1～3∶1,并且在信噪比为0～-3dB是能达到很好的重构性能。
In the underwater acoustic communication, due to the complexity of the communication and power of the underwater source e- quipment is limited as well as the unreliability of the acoustic channel~ the underwater acoustic communication is a challenge task. Joint source and channel coding algorithm can achieve reliable underwater acoustic communication. Currently, the joint source--channel algorithm is less applied to underwater acoustic communication. Joint Source Channel Lempel--Ziv--Welch （LZW） coding technique is proposed for the deep water acoustic communication system using in this paper and comparative analysis of the performance of the RS are subject to equal protection of source coding. Combined with practical application environment, LZW source coding algorithm is simple to implement, RS cod- ing can correct continuous burst error, and it is suitable for underwater acoustic channel because its reliability is not high. Simulation results show that this algorithm for lossless compression ratio of 2：1 to 3.. 1 in the case of without increased device complexity and system over- head, and the SNR is 0 --3dB is able to achieve a good reconstruction property.
出处
《计算机测量与控制》
北大核心
2013年第8期2238-2240,2285,共4页
Computer Measurement &Control
基金
国家深水油气项目资助(2008ZX05026-01-08)
