【摘要】 设计了GMSK(Gauss Minimum Shift Keying,高斯最小频移键控)无线接收终端的硬件与软件系统。硬件的射频电路对空中信号进行接收与滤波,再由以MX589构成的解调模块解调,输出数字信号;数字硬件以单片机GMS97I52为核心。软件系统设计了对IC卡AT88SC1608加密卡的认证以及对串行数据的接收与处理的中断程序。终端系统接收数据快、性能稳定。更多还原

【Abstract】 We describe the functions of the wireless receiving terminal with GMSK demodulation. In the hardware part, radioactive frequency circuits were designed to receive and filter the wireless signals. The demodulation module consisted of a MX589 chirp. The design of digital circuits was based on the singlechip GMS97L52. Software implemented the IC card authentication and the serial data process. The terminal receives data at high speed and functions with steady performance.更多还原