基于Simulink的对偶序列跳频通信链路设计仿真

Design and Simulation of Dual Sequence Frequency Hopping Communication Link Based on Simulink

在军事无线通信的研究背景下,首先介绍了对偶序列跳频通信系统的基本原理及链路模型,并应用Matlab/Simulink软件搭建了符合实际环境的发射端信号模型.其次在接收端,设计了双门限判决仿真链路结构并对比分析了通信系统通过加性高斯白噪声信道后,不同判决链路的误码率情况.最后在此基础上,研究了系统接收端判决阈值随信噪比适应性变化的关系及性能,仿真模型研究结果表明,自适应阈值判决结构的性能优于固定阈值判决结构.

Under the research background of military wireless communication,the basic principle and link model of the dual sequence frequency hopping communication system are introduced firstly,and a signal model of the transmitting end conforming to the actual environment is built using Matlab/Simulink software.Secondly,at the receiving end,a dual-threshold decision simulation link structure is designed and the bit error rate of different decision links after the communication system passes through the AWGN channel is compared and analyzed.Finally,on this basis,the relationship and performance of the decision threshold and the system receiving end with the daptive change of the signal-to-noise ratio is studied.The performance of the simulation model show that the performance of the adaptive thresholds decision structure is better than that of the fixed threshold decision structure.