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ＮＴＴ无线通信系统实验室开发了数字移动通信网用的、传输质量高的、小型且经济的基地站设备。本文介绍整个基地站系统设备的组成，各部分的功能概况及主要参数。基地站系统设备由收发天线、放大装置、调制解调装置、话音处理装置、基地站控制装置组成。在各装置中，开发和采用了以下技术：（１）馈电振子分割微带天线技术；（２）自动调整前馈（ＳＡＦＦ）超低失真线性共用放大技术；（３）采用分集接收技术及误差纠正的高可靠性无线传输技术；（４）符合日本标准的高效话音编码方式及高质量ＶＯＸ控制方式；（５）分布式多处理机结构。采用这些技术之后，实现了高水平、高质量的通信，并可使整个基地台系统设备的体积减少到模拟系统基地台的五分之一，价格也大幅度地减少。
NTT Wireless Communications Systems Laboratory has developed a high-quality, small and affordable base station equipment for digital mobile communications networks. This article describes the composition of the entire base station system equipment, each part of the function profile and the main parameters. Base station system equipment from the transceiver antenna, amplifier, modem, voice processing device, base station control device. In each device, the following technologies have been developed and adopted: (1) feeder oscillator sub-band microstrip antenna technology; (2) SAFF ultra-low distortion linear common amplification technique; (3) diversity reception technique and Error correction of high reliability wireless transmission technology; (4) meet the Japanese standard of efficient voice coding and high quality VOX control; (5) distributed multiprocessor structure. With these technologies, a high level of quality communications is achieved and the overall base station equipment footprint is reduced to one-fifth that of analog system base stations and the price is significantly reduced.