Performance analysis and simulation of maximum ratio combining in underwater laser communication

CORC > 上海光学精密机械研究所 > 中国科学院上海光学精密机械研究所 > 空间激光信息技术研究中心

	Performance analysis and simulation of maximum ratio combining in underwater laser communication
	Hu SQ(胡思奇); Zhou TH(周田华); Chen WB(陈卫标)
刊名	中国激光
	2016
卷号	43 期号:12 页码:207
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.
资助信息	国家863计划(2014AA093301);; 中国科学院国防创新基金
内容类型	期刊论文
源URL	[http://ir.siom.ac.cn/handle/181231/28408]
专题	上海光学精密机械研究所_空间激光信息技术研究中心
作者单位	中国科学院上海光学精密机械研究所
推荐引用方式 GB/T 7714	Hu SQ,Zhou TH,Chen WB. Performance analysis and simulation of maximum ratio combining in underwater laser communication[J]. 中国激光,2016,43(12):207.
APA	胡思奇,周田华,&陈卫标.(2016).Performance analysis and simulation of maximum ratio combining in underwater laser communication.中国激光,43(12),207.
MLA	胡思奇,et al."Performance analysis and simulation of maximum ratio combining in underwater laser communication".中国激光 43.12(2016):207.