GSM蜂窝移动通信系统中的数字接收机技术

The Technique of a Digital Receiver for the GSM Cellular Mobile Communication System

本文介绍了泛欧数字蜂窝移动通信系统ＧＳＭ（ＧｒｏｕｐＳｐｅｃｉａｌＭｏｂｉｌｅ）的数字接收机的主要原理。在ＧＳＭ系统中，数字信息受无线电移动信道多路径衰落影响，故依据Ｖｉｔｅｒｂｉ算法补偿多路径传播和多普勒频移引起的选择性畸变，而提出了最大似然序列估计（ＭＬＳＥ）接收机，该接收机的性能可利用移动通信信道仿真器来评价。

This paper describes the main principle concerning the implementation of a numerical receiver for the Pan European Cellular Mobile Communication GSM System. In this system. the digital information is affected by the multipath mobile radio channel. The purposed Maximum Likelihood Sequence Estimation (MLSE) receiver based on Viterbi algorithm compensates selective distortions due to the multipath propagation and Doppler Shift. The performance of this receiver is evaluated using a channel simulator suitable for mobile communications.