扩频通信系统的仿真设计

Simulation Design of Spread Spectrum Communication System

扩频通信就是让待传输信号乘上特定的扩频码,将信号频谱大大展宽的通信过程。通过频谱的扩展,有效地提高保密性和抗干扰能力,提高通信系统的可靠性。本文依靠信息化手段,借助计算机软件仿真技术设计了扩频通信系统。先后分析了扩频的实现方法、解扩的实现方法、整体的仿真系统设计和性能比较,验证了算法是切实可行的。从仿真波形上可以清晰看出,有扩频比没有扩频的波形失真度小得多;扩频技术能够有效地抗击噪声的影响,提高系统的信噪比,提高系统性能。

Spread spectrum communication is a communication process in which the signal to be transmitted is multiplied by a specific spread spectrum code and the spectrum of the signal is greatly broadened. Through the expansion of spectrum,the security and anti-jamming ability can be effectively improved,and the reliability of communication system can be improved. In this paper,the spread spectrum communication system is designed by means of information technology and computer software simulation technology. The implementation methods of spread spectrum,despreading,overall simulation system design and performance comparison are analyzed successively,and the feasibility of the algorithm is verified. From the simulation waveform,it can be clearly seen that the waveform distortion with spread spectrum is much smaller than that without spread spectrum. Spread spectrum technology can effectively resist the influence of noise,improve the signal-to-noise ratio of the system and improve the system performance.