基于GMSK调制慢跳频通信系统的软件无线电实现结构及性能分析

Software radio structure of slow frequency-hopping system based on GMSK modulation and its performance analysis

探讨了慢跳频通信系统的软件无线电实现结构,将GMSK调制方式引入到跳频软件无线电的前端,利用其高频谱效率特点实现高速率的数据传输.分析了该系统发送端与接收端实现模型,对全系统的数字化实现做出了理论分析.针对跳频产生的相位不连续情况,采用了Viterbi非相干解调算法.对这一系统主要模块给出了数学分析,经计算机模拟仿真获得其误码性能,结果令人满意,证明该方法行之有效,具有一定的理论意义和应用价值.

GMSK modulation was used in the front part of the software radio structure of solow frequencyhopping system,making use of its good spectrum effciency to realize highspeed data transmission.The transmission and reception model and the digitalisation of the whole system were analysed.Noncoherent demodulation based on Viterbi detection was used for the discontinuity of FH signal.The main module and its BER were analysed with satisfactory results obtained.