一种增强型差分跳频系统G函数设计算法  

Improved frequency transition function construction method the differential frequency hopping system

作　　者：周志强[1] 李少谦[1] 程郁凡[1] 

机构地区：[1]电子科技大学通信抗干扰国家级重点实验室,成都611731

出　　处：《电子测量与仪器学报》2010年第4期327-333,共7页Journal of Electronic Measurement and Instrumentation

基　　金：国家基础科研项目(编号:A1420080150)资助项目;国家自然科学基金(编号:60502010)资助项目;国防科技重点实验室基金(编号:9140C0204010703)资助项目

摘　　要：差分跳频系统能实现高速数据传输。G函数有机的将跳频控制与调制相结合,是差分跳频系统中的一项关键技术。传统差分跳频G函数的最小自由距离受限于跳频频点个数,若要改善系统性能,必须增大系统带宽;提出了一种新型差分跳频G函数,该G函数的最小自由距离不再受跳频点个数的限制,给出了一种构造该G函数的方法,并对其最小自由距离进行了分析,结果表明,它能增大G函数的最小自由距离。给出了该类型G函数在Nakagami-m衰落信道模型下的理论误码率界及仿真验证。最后在Nakagami-m衰落信道下对其进行了性能仿真,结果表明它能提高差分跳频通信系统性能。Differential frequency hopping（DFH） is a kind of system for reliable high data rate transmission.The frequency transition function which combines frequency hopping pattern controlling and modulation is one of the key technologies in DFH.The free distance of traditional frequency transition function is confined to the number of fre-quencies in the hopping pattern.The improvement of the system performance is at the price of system band.In this pa-per,an innovative frequency transition function is proposed.The free distance of the new frequency transition function was analyzed and it is no longer confined to the frequency number.The upper bound of bit-error-rate over Nakagami-m channels was analyzed and validated by simulation.Meanwhile the performance comparison between the improved frequency transition function and the traditional one was investigated by simulation which shows that considerable im-provement can be achieved.

关 键 词：差分跳频 G函数 自由距离 有限域 

分 类 号：TN92[电子电信—通信与信息系统]