一种GMSK调制器的简化设计

摘要

GMSK modulation signal is constant envelope with high spectrum efficiency, but its waveform storage and orthogonal modulation is too complex due to phase path computation and memory address mapping. Joining the separate Gaussian filter into MSK modulation circuit, a simplified design of GMSK modulation is proposed, which has the advantage of simple structure and Gaussian filter design flexibility. The time-domain and frequency-domain simulation tests the validity of simplified GMSK modulation design.%GMSK调制信号包络恒定、频谱利用率高，但传统的波形存储正交实现方法在相位路径的计算和存储器地址映射上过于复杂。将高斯滤波器作为独立模块加入 MSK 调制电路中，得到一种GMSK调制器的简化设计，其具有结构简单、高斯滤波器设计灵活的优点。通过频域和时域仿真验证了GMSK调制器简化设计的有效性。