摘要
分布式M IMO天线结构可以降低发射功率,减少小区干扰,而天线选择技术在保持了M IMO系统优点的同时降低成本。TD-SCDMA有独特的时隙结构,可将不同时隙用于不同的天线组来覆盖不同的小区。基于此,提出了一种分布式天线选择的动态小区覆盖技术,采用两级天线选择,第一级可根据用户的具体位置选择天线组并确定覆盖范围,有效减少小区干扰,同时采用了预分配天线组方法,避免了通用天线选择算法的复杂性;第二级在选定的天线组内确定具体的天线,仿真结果说明该方法具有与一般天线选择相同的性能但更简单。
Distributed antenna in MIMO system can reduce the transmit power, which led to reduce the cell interference. Antenna selection can reduce the cost while maintaining the high potential data rate of a MIMO system. TD-SCDMA has time slot frame, different time slot can be assigned to different subset antenna to cover different cell. Based on these, a dynamic cell scheme is proposed in this paper, which has two steps to select the antenna： The first step, select a distributed subset antenna to cover a sell according to the location of user, the subset antenna was pre-assigned to avoid the complexity of antenna selection. The second step, choose the suitable antenna in a given subset to meet the maximal channel capacity. It will be shown via simulation that this scheme offers almost the same performance than common antenna selection systerm.
出处
《无线通信技术》
2006年第4期36-40,共5页
Wireless Communication Technology
