低复杂度GMSK线性接收机的设计与实现

通过基于GMSK信号的Laurent分解,提出了一种低复杂度GMSK线性接收算法,利用卫星GMSK信号的主要信号能量成分的表达式可等效为经过成型滤波的正交调制信号,设计出了低复杂度GMSK线性接收机,并对所提出的接收机进行了性能损失的理论分析.基于FPGA芯片对提出的接收机进行了硬件实现,实测结果表明,接收机的误码率性能相对于理论误码率性能的损失小于1 dB,所提出的接收机已应用于我国的探月工程任务中.

Design and Implementation of Low Complexity GMSK Linear Receiver

A low complexity GMSK linear receiver algorithm based on the Laurent decomposition of GMSK signals was proposed.The new algorithm utilized the main signal energy component of satellite GMSK signal which is equivalent to shaping quadrature modulation signal to design a low complexity GMSK linear receiver,and the theoretical performance loss of the proposed receiver was analyzed.The receiver proposed was realized in FPGA,and the BER performance test showed that the BER performance losses was less than 1 dB comparing with the theoretical BER performance.The proposed receiver has been used in China's lunar exploration mission.