超短波模拟调频通信是目前国内外移动通信中采用的一种主要通信方式,这种通信体制无论在理论上和实践上都比较成熟,设备也比较完善。但是,随着数字技术的发展和计算机的日益广泛应用,数字信号易于加密,能长距离中断传输而不累积噪声,数字通 Ultra-shortwave analog FM communication is one of the main communication methods used in mobile communication at home and abroad at present. This kind of communication system is relatively mature both in theory and in practice, and the equipment is relatively perfect. However, with the development of digital technologies and the increasingly widespread use of computers, digital signals are easily encrypted and can transmit over long distances without accumulating noise.