DWCS中的天线动态选择算法

针对分布式无线通信系统上行链路,在考虑CDMA多址方式和多用户检测接收机的条件下,提出了一种天线动态选择算法,即在保证虚拟小区接收到的比特信干噪比达到门限的前提下,通过对比特信干噪比的增量和接收机复杂度的增量进行折中,动态地选择尽可能多的接收天线,使移动终端平均发射功率最小化。仿真结果表明,与天线静态选择方法相比,该算法可获得与其几乎相同的中断容量,移动终端平均发射功率减小量与接收机平均复杂度的比值高于天线静态选择方法。

Novel Antenna Dynamic Selection Algorithm for Distributed Wireless Communication System

For the uplink in CDMA distributed wireless communication system (DWCS) employing the multi-user detection receiver, an antenna dynamic selection algorithm is proposed. As the bit signal-to-interference-plus-noise ratio from a virtual cell arrives at the threshold, antennas are selected dynamically as many as possible to minimize the average power of mobile terminal by getting the trade-off between the increment in the bit signal-to-interference-plus-noise ratio and the increment in the receiver complexity. The simulation shows that the proposed algorithm can achieve almost similar outage capacity as the antenna static selection (ASS) method while the ratio of average power decrement of mobile terminal to average receiver complexity of the proposed algorithm is greater than that of ASS.