信息安全与通信保密
信息安全與通信保密
신식안전여통신보밀
CHINA INFORMATION SECURITY
2012年
12期
71-73
,共3页
序列%直接序列扩频%解扩%误码率
序列%直接序列擴頻%解擴%誤碼率
서렬%직접서렬확빈%해확%오마솔
m-sequence%DSSS%de-spreading%error rate
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。
以擴頻理論為基礎，用MATLAB／Simulink對直接序列擴頻通信繫統進行瞭建模倣真。繫統中擴頻編碼採用週期為15的m序列，信道採用信譟比為-20dB的AWGN信道，整箇繫統採用BPSK調製／解調方式。在給定的倣真條件下，對倣真模型進行瞭運行測試，測試結果錶明，該繫統能完成信號的擴頻和解擴，且誤碼率非常低，得到瞭預期的倣真結果。倣真方法和結論對實際應用有一定的參攷價值。
이확빈이론위기출，용MATLAB／Simulink대직접서렬확빈통신계통진행료건모방진。계통중확빈편마채용주기위15적m서렬，신도채용신조비위-20dB적AWGN신도，정개계통채용BPSK조제／해조방식。재급정적방진조건하，대방진모형진행료운행측시，측시결과표명，해계통능완성신호적확빈화해확，차오마솔비상저，득도료예기적방진결과。방진방법화결론대실제응용유일정적삼고개치。
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.
