【摘要】 将零中频正交矢量检测应用于高斯最小移频键控(GMSK)信号,提出了一种非常简单的检测方法。计算机模拟结果表明在理想状态下有较好的误码特性。并用单片TMS320C25和少量外围电路实现了码速率为72kbit/s的零中频接收机结构,用软件完成了误差频率估计、定时恢复、角度判决等算法。系统硬件结构非常简单,性能可靠,实测误码特性与计算机模拟结果比较接近。更多还原

【Abstract】 The Zero-IF quadrature vector detection, a common technique, is applied to the detection of GMSKsignal. The computer simulation results show that the performance is satisfactory in ideal states. The Zero-1F digital receiver composed of one TMS320C25 chip and some other external circuits. The algorithms forerror frequency estimation, timing recovery and angle decision completed with software are introduced.The system structure is very simple. The test performance is reliable and is close to the simulation results.更多还原