白高斯噪声下取样PPM信号的最大似然检测  

Maximum Likelihood Detection for Sampled PPM Signals in White Gaussian Noise

作　　者：朴大志[1] 邹传云[1] 

机构地区：[1]桂林电子工业学院通信与信息工程系,广西桂林541004

出　　处：《桂林电子工业学院学报》2002年第3期5-8,共4页Journal of Guilin Institute of Electronic Technology

基　　金：国家自然科学基金资助项目 ( 6 9982 0 0 4)

摘　　要：在强背景光干扰的情况下 ,光 PPM信道可以看成 AWGN信道 ,从理论上推导了在这种信道中任意脉冲形状的每时隙多次抽样数字 PPM信号最大似然接收机的似然函数 ,画出了接收机的结构框图 ,并分析了这种接收机的误码率 ,最后为了验证这种接收机的可靠性并讨论各种参数对接收机性能的影响 ,对接收机的解调正确率进行了计算机仿真。In high levels of background radiation, the optical PPM channel can be approximated as an AWGN channel. The Maximum likelihood decision statistic and the receiver structure for the sampled PPM signals of arbitrary laser pulse in the White Gaussian noise are presented in this article. Then the symbol error probabilities of this receiver are derived. At last, to test the reliability of this receiver and discuss its performance variations with the parameters, we evaluate its symbol correct probabilities by the computer stimulation.

关 键 词：白高斯噪声 最大似然检测 似然函数 误码率 PPM信号 

分 类 号：TN911.23[电子电信—通信与信息系统]