一种TETRA数字集群系统中同道干扰消除的方法

Method for canceling co-channel interference in TETRA digital trunking system

研究提出了一种TETRA数字集群系统同道干扰消除的方法。该方法基于移动信道的特性,在独立衰落多径信道上对每个同道信号进行独自的波形译码,使接收机能够对同道信号进行分离。利用推导的多个同道信道信号的联合检测和信道估计算法,对同道干扰进行消除。这种方法不仅能够快速准确地获得某个特定用户的信息,而且计算量较小。仿真结果表明所提出的方法能够有效地消除同道干扰,改善TETRA数字集群系统接收机的误码率性能。

A method for canceling co-channel interference in TETRA digital trunking system is proposed. This method is based on the characteristics of mobile channels ; and distinct waveform coding for each of the co-channel signals is made on the independently fading muhipath channel, so that the receiver can separate the co-channel signals. By using the derived algorithm of joint detection and joint channel estimation, co-channel interference is cancelled. This method not only can quickly and accurately obtain the information of one special user, but also requires smaller computation. Simulation results demonstrate that the proposed method can effectively cancel co-channel interference, and improve BER performance of the receiver in TETRA digital trunking system.