数字集群通信中GMSK信号解调算法的研究  

Demodulation algorithm of GMSK signal in digital trunking communication

作　　者：张志恒[1,2] 梁卫祖 蔡凡 尹路明[2] 

机构地区：[1]中国科学院上海天文台,上海200030 [2]北京环球信息应用开发中心,北京100094 [3]广州海格通信集团股份有限公司,广东广州510663

出　　处：《现代电子技术》2014年第13期64-67,共4页Modern Electronics Technique

摘　　要：详细介绍了国内某数字集群系统中使用的解调算法,推导了GMSK信号的Laurent分解过程,重点分析简化最优接收机到单脉冲匹配滤波接收机的转换过程,比较了在不同频偏环境下解调算法的性能差异并给出相关仿真结果。The demodulation algorithm used in a digital trunking system made in China is introduced in detail. The Laurent decomposition process of GMSK （Gaussian filtered minimum shift keying） signal is derived in this paper. The conversion pro-cess from the simplified optimal receiver to the single pulse matched-filtering receiver is analyzed emphatically. The performance difference of the demodulation algorithm is compared at different frequencies. The relevant simulation result is given.

关 键 词：GMSK 差分解调 准相干解调 集群系统 

分 类 号：TN965.534[电子电信—信号与信息处理]