基于FPGA的OPPM-TCM建模与仿真

Modeling and Simulation of OPPM-TCM System Based on FPGA

将网格编码调制(TCM)技术应用于采用重叠脉冲位置调制(OPPM)方式的大气激光通信系统中,能够在不降低带宽利用率的前提下改善系统的性能。对面向OPPM的TCM系统中的各个模块进行基于现场可编程门阵列(FPGA)的建模与设计,详细绘制了各模块的建模方框图及发送端和接收端的顶层电路图,仿真结果表明所设计的系统能够达到预期功能的要求。

Applying trellis coded modulation （TCM） to atmosphere laser communication system with overlapping pulso-position modulation （QPPM） can improve the system performance at no penalty in bandwidth utilization ratio. The TCM system for QPPM based on field programmable gate array （FPGA） is modeled and designed. The modeling block diagrams and the top layer circuit diagrams of send cell and receive cell have been given. The result of simulation indicates that the system can meet the expectant reauest.