基于脉冲调制的并行组合扩频通信系统性能研究*

为满足现代通信系统对通信的高效性和安全性的要求，本文提出一种基于脉冲调制的并行组合扩频通信系统，结合超宽带通信脉冲调制和并行组合扩频通信各自在保密性能和高效通信能力方面的优点，使新的系统可以同时具有高效的通信能力和良好的安全保密性能。设计、建立系统模型，并利用仿真软件对系统性能进行仿真和分析。仿真结果表明，基于脉冲调制的并行组合扩频通信系统在误码性能方面优于常规超宽带脉冲调制通信系统和常规正弦载波调制的并行组合扩频通信系统，并且可以通过并行组合扩频部分参数的设置提高系统的信息传输速率，验证了脉冲调制并行组合扩频通信系统良好的误码性能、信息传输能力和系统可行性。

Performance studies of parallel combinatory spread spectrum based on pulse modulation

In order to meet the command of high efficiency and security in modern communication system, the paper gives a new parallel combinatory spread spectrum communication system based on the pulse modulation, which composites the advantages of the security and the high efficiency of pulse modulation UWB communication system and parallel combinatory spread spectrum communication system. And the new system can possess the high efficiency and fine security at the same time. The model of the new system is set up by the simulation software and then gives the simulation of the bit error rate (BER) performance of the system. With the results of the simulation, the new system is better than normal pulse modulation UWB communication system and normal parallel combinatory spread spectrum communication system of the BER performance. And the transmission rate of information can also be enhanced by changing the parameters of parallel combinatory spread spectrum. Simulation results have verified fine BER performance, ability of information transmission and the feasibility of the system.