中文题目: 水下激光通信最大比合并分集接收性能分析及仿真
外文题目: Performance analysis and simulation of maximum ratio combining in underwater laser communication
作者: 胡思奇;周田华;陈卫标;
刊名: 中国激光
年: 2016 卷: 43 期: 12 页： 207--214
中文关键词:
光通信;;水下激光通信;;最大比合并分集接收;;蒙特卡罗法
中文摘要:
受海水吸收和散射的影响,长距离水下通信时信号幅度下降,信噪比(SNR)降低,最终导致水下激光通信系统的误码率(BER)提升,最远通信距离受限。为此,提出将最大比合并(MRC)分集接收技术应用于水下激光通信系统。分析和研究了在水体吸收和散射的综合作用下,MRC空间分集接收技术相对于等增益合并(EGC)空间分集接收技术对水下激光通信系统接收器性能的改善。推导了MRC加权系数分配方式,分析了接收支路数目与系统BER性能的关系,采用蒙特卡罗法对波长为532nm的绿光在IB型水质下100m处六路分集接收器中MRC相

英文摘要:
Due to the influence of absorption and scattering of seawater, the amplitude of received signal reduces and the signal-to-noise ratio (SNR) reduces during long distance underwater communications, which leads to the bit error rate (BER) of underwater laser communication systems rise, and eventually limits the distance of communication. For this reason, the maximum ratio combining (MRC) diversity reception technology applied in the underwater laser communication system is put forward. The improvement of MRC spatial diversity reception technology compared with the equal gain combining (EGC) spatial diversity reception technology is analyzed under the influence of absorption and scattering of water. Weighting coefficient distribution of MRC is deduced. The relationship between receiver number and system BER performance is analyzed. Monte Carlo method is used to simulate the performance improvement of MRC based on 532 nm laser at transmission distance of 100 m in Jerlov IB water with six receivers. In the IB and II type water, the relationship between BER and transmission distance is given for MRC and EGC. The theoretical analysis and simulation results show that MRC can distribute gain coefficients more reasonably according to SNR in each receiving branch, to achieve the optimal SNR. Under the requirement of same BER, MRC can realize the longest transmission distance of underwater laser communication. Under the requirement of same transmission distance, MRC can reduce BER of communication system. An engineering solution for long distance underwater laser communication system is provided. ? 2016, Chinese Lasers Press. All right reserved.


文献类型: 期刊论文
正文语种: chinese
收录类别: EI
DOI: 10.3788/CJL201643.1206003


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