摘要
采用扩频信号进行通信的优越性在于用扩展频谱的方法可以增大带宽来降低信噪比。在阐述扩展频谱通信技术的基本理论和实现方法的基础上,详细介绍了直接序列扩频以及伪随机码m序列原理、产生m序列的条件。继而提出了若干种矿井应急通信系统的具体设计方案,并利用MATLAB/Simulink软件平台对该系统进行了仿真及分析。结果表明,该系统可以有效抑制信号干扰,可靠传输信号,达到矿井应急通信系统设计之目的。
The superiority of using spreading spectrum signal to communicate lies in that the method of spreading spectrum can increase bandwidth and reduce SNR（Signal to Noise Ratio）. On the basis of demonstrating the basic theory and realization method of spreading spectrum communication, the authors introduce the principle of Direct Sequence Spreading Spectrum and m-series of pseudo-random code, and the condition of generating m-series in detail. After that, some kinds of design scheme of mine emergency communication system are put forward. And the system is simulated and analyzed by MATLAB/Simulink software platform. The results indicates that the system can suppresses the signal interference effectively, transfer the signal reliably, which attains the design goal of mine emergency communication system.
出处
《电子测试》
2011年第3期11-16,共6页
Electronic Test
