无背景噪声下的光MPPM信道容量分析  

Analysis of optical MPPM channel capacity without background noise

作　　者：秦岭[1] 柯熙政[1] 

机构地区：[1]西安理工大学自动化与信息工程学院

出　　处：《光电工程》2007年第7期107-110,共4页Opto-Electronic Engineering

基　　金：陕西省"火炬计划"项目(2002HK52);陕西省教育厅科技资助项目(04JK247)

摘　　要：基于多脉冲位置调制(MPPM)在无背景噪声下的信道模型,根据信息理论,推导了有保护时段的光MPPM信道容量的表达式,在此基础上又推出了MPPM的信息传输速率和容量能量效率的表达式。分析并比较了MPPM和PPM的信道容量、信息传输速率以及信道容量能量效率。仿真结果表明,在对光脉冲功率、系统带宽倒数、单个脉冲所含光子数等参数进行适当的选取以后,MPPM在信道容量方面的特性优于PPM。Based on the channel model of Multi-pulse Position Modulation （MPPM） without background noise, the expression of channel capacity, the expression of information transmission rate and the expression of energy efficiency of MPPM with protective time slot were derived according to information theory. Channel capacity, information transmission rate and energy efficiency of MPPM and PPM were analyzed. The simulation results show that compared with PPM, MPPM offers better channel capacity, information transmission rate and energy efficiency when parameters are selected properly such as optical pulse power, the reciprocal of system bandwidth and the average number of photon for single pulse.

关 键 词：多脉冲位置调制 保护时段 信道容量 

分 类 号：TN914.2[电子电信—通信与信息系统]