基于MATLAB扩频通信系统误码率的研究

Study on Bit Error Rate of Spread Spectrum Communication System based on MATLAB

扩展频谱通信技术是现代通信技术的热点之一,是一种非常重要的抗干扰通信技术,因为其信号所占有的频带宽度远大于所传信息必需的最小带宽,从而能达到抗干扰的目的。扩频通信系统与其他通信系统相比,有着特殊的优点,就是能在负信噪比的情况下完成通信。这里分析比较了各种噪声在直接序列扩频通信系统中影响误码率的程度,并通过MATLAB软件对其不同噪声条件下误码率与信噪比之间的关系进行仿真研究。

Spread spectrum communication technology is a very important anti-interference communication technology,and thus becomes the hotspot of modern communication technology.For its bandwidth occupation is much lager than the minimum bandwidth required for the transmission of information,thus it could achieve the anti-interference goal.Compared with other communication systems,spread spectrum communication system has its unique advantage featuring in communication under negative signal-to-noise ratio.Different bit error rates influenced by various kinds of noise in the direct sequence spread spectrum communication system are analyzed and compared.Moreover,the relationship between the bit error rate and the signal-to-noise is studied and simulated with MATLAB under different kinds of noise.