数字集群通信中GMSK信号解调算法的研究

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.