研究了蜂窝通信系统中基站同时与N个移动用户通信时一种新的发送分集方法。该方法将N个用户的信源信号在发送端采用线性变换进行联合编码后送入N个独立信道进行传送。分集发送信号经衰落信道传送后,对每一个信号接收者,其收到的信号可以表示成格型码的形式,可以使用球型译码算法进行信号解调。 A new method of transmit diversity for base stations communicating with N mobile users in cellular communication system is studied. In the method, source signals of N users are jointly encoded by a linear transformation at a sending end, and then sent to N independent channels for transmission. After the diversity transmission signal is transmitted through the fading channel, the signal received by each signal receiver can be expressed in the form of a trellis code, and the ball type decoding algorithm can be used for signal demodulation.