基于Turbo码的扩频通信系统仿真

The Spread Spectrum Communication System Simulation Based on Turbo Codes

在分析扩频通信系统和turbo码编译原理的基础上,利用MATLAB软件的Simulink模块库构建了基于turbo码的扩频通信系统仿真模型.在一定的仿真条件下,对发送信息序列的时间波形以及误码率进行了仿真.仿真结果表明,在无噪声时,接收端可以准确的恢复出发送的信息序列;在有噪声时,恢复出的信息序列具有较低的误码率,这说明基于turbo码的扩频通信系统对噪声有很好的抑制效果,达到了预期目的.

On the basis of the analysis of the spread spectrum communication system and the compile principle of turbo codes, Simulink block library of MATLAB software are used to build the spread spectrum communication system simulation model based on turbo codes. The time profile and the error rate of the transmitted information se- quence are emulated under certain simulation conditions. Simulation results show： while there is no noise, the re- ceiver can accurately recover the received information sequence; while there are noises, the recovered information sequence has the lower error rate, which shows the spread spectrum communication system based on turbo codes has the good effect of noise suppression and achieves the desired purpose.