中文摘要：

针对多天线无线MIMO系统性能往往严重受限于邻近小区其他用户干扰的问题,提出了一种源于分布在不同地理位置且与中心控制单元相连的多个射频接入点（或基站）通过网络协作向用户发送信息信号的下行传输结构,并给出了相应的信号传输模型,同时基于脏纸码和迫零联合处理策略研究了空间预滤波优化设计方法。通过性能分析可看出,该多点协作模式能有效地抑制邻近小区的同频干扰,获得的系统性能接近于理想单小区无干扰用户,与此同时,若增加收发天线数目则能明显改善系统频谱效率。

英文摘要：

A sort of downlink system structure and its signal transmission model are proposed for multi-point network coordination transmitting information symbols to users through geographically dispersed multiple radio access points connected to a central processing unit. Optimal algorithms for the spatial prefihering are investigated by simultaneously adopting the dirty paper coding and zero-forcing methods. Some numerical simulation results show that this approach can efficiently mitigate co-channel interference, greatly enhance system performance approaching to the ideal interference-free single cell user, and significantly improve spectral efficiency gain with increasing the number of antennas.