基于m序列的直接序列扩频通信系统仿真  

Simulation on DSSS Communication System based on m-sequence

作　　者：谢水珍[1] 

机构地区：[1]九江学院电子工程学院,江西九江332005

出　　处：《信息安全与通信保密》2012年第12期71-73,共3页Information Security and Communications Privacy

摘　　要：以扩频理论为基础,用MATLAB/Simulink对直接序列扩频通信系统进行了建模仿真。系统中扩频编码采用周期为15的m序列,信道采用信噪比为-20dB的AWGN信道,整个系统采用BPSK调制/解调方式。在给定的仿真条件下,对仿真模型进行了运行测试,测试结果表明,该系统能完成信号的扩频和解扩,且误码率非常低,得到了预期的仿真结果。仿真方法和结论对实际应用有一定的参考价值。Based on spread spectrum theory and with Matlab/Simulink the DSSS（direct sequence spread spectrum） communication system is modeled and simulated. The cycle of 15 m-sequence, the AWGN channel of 20 dB channel signal to noise ratio and the BPSK modulation/demodulation method are adopted for the whole system. Under the given condition, operation test on the simulation model show that the DSSS communication system could accomplish the spectrum spreading and de-spreading of the signal while has a fairly low error rate, thus the expected simulation result is achieved. Both simulation method and experiment have certain reference value for practical applications.

关 键 词：序列 直接序列扩频 解扩 误码率 

分 类 号：TN914.42[电子电信—通信与信息系统]