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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 one of the hot spots of modern communication technology. It is a very important anti-interference communication technology because the signal bandwidth occupied by its signal is much larger than the minimum bandwidth required by the information transmitted so as to achieve the purpose of anti-interference. Compared with other communication systems, the spread spectrum communication system has the special advantage that communication can be completed under negative signal-to-noise ratio. Here, we analyze and compare the impact of various noises on the bit error rate in direct sequence spread spectrum communication system, and simulate the relationship between bit error rate and signal-to-noise ratio under different noise conditions by MATLAB software.