摘要
根据香农定理和柯捷尔尼可夫潜在抗干扰理论 ,借助MatLab工具箱和MonteCarlo仿真算法 ,建立了直接序列扩频通信系统仿真模型 .通过分析无干扰时的误码率仿真曲线与理论计算值 ,证明了所建仿真模型的正确性 .以此为基础 ,研究了扩频处理增益、正弦干扰信号振幅与误码率的关系 ,结果表明 :在相同信噪比下 ,处理增益越大 ,误码率越小 ,特别是大信噪比时 ,这种差别尤为明显 ;而在处理增益不变时 ,正弦干扰信号振幅增加 ,误码率则增大 .
According to the theory found by Shannon and potential antinterference theory, this paper sets up a simulation model of direct sequence spread spectrum communication system by using the MatLab toolboxes and the Monte Carlo method. We prove the accuracy of this model by analyzing the error rate curves without interference and the calculated values. Furthermore, we analyze the relationship of the error rate with spread spectrum processing gains and sin interference signals having different amplitudes. The result proved that the greater the processing gain is, the less the error rate is, especially when the signal-to-noise ratio is greater, this difference is obvious. However, when the processing gain is invariable, the error rate increases accompanying the increase of the amplitude of the sin interference signal.
出处
《大庆石油学院学报》
CAS
北大核心
2002年第2期40-42,共3页
Journal of Daqing Petroleum Institute
基金
国家教育部重点研究项目 (地方 0 2 0 47)
关键词
直接序列
扩频通信系统
误码率
仿真分析
direct sequence
spread spectrum
communication
simulation
error rate
