论文部分内容阅读
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 Shannon’s theorem and Kotynnikov’s potential anti-interference theory, a simulation model of direct sequence spread spectrum communication system is established by using MatLab toolbox and Monte Carlo simulation algorithm.By analyzing the BER curve and theoretical calculation value , Which proves the correctness of the simulation model.On the basis of this, the relationship between the gain of the spread-spectrum processing and the amplitude of the sinusoidal interference signal and the bit error rate is studied. The results show that the larger the processing gain This difference is especially noticeable when the code rate is small, especially when the signal-to-noise ratio is large. However, when the processing gain is constant, the amplitude of the sinusoidal interference signal increases and the bit error rate increases.