论文部分内容阅读
分布式天线系统通过在地理位置上分布式放置天线,增强了系统的覆盖性能,也提高了系统的分集增益和容量性能。通过自主搭建的信道测量平台,对室内分布式天线系统信道进行了测量,其中发端天线分布式放置,接收端天线集中放置,对数据分析表明,在不存在视距传输或者视距传输分量不明显的情况下,各发天线到收端的信道解相关特性良好,容量性能提高较大;反之则容量性能下降。系统容量与天线是否均匀放置也密切相关,天线均匀放置时,容量提高且分布更为均匀。
The distributed antenna system enhances the coverage of the system and also improves the diversity gain and capacity of the system by distributing antennas in a geographical location. The channel of the indoor distributed antenna system was measured by the self-built channel measurement platform. The transmitting antenna was placed in a distributed manner and the receiving antenna was placed centrally. The data analysis showed that in the absence of line-of-sight transmission or the line-of-sight transmission component , The correlation characteristics of the channels from the transmitting antenna to the receiving end are good, and the capacity performance is greatly improved; otherwise, the capacity performance is degraded. The system capacity is also closely related to whether the antenna is evenly placed or not. When the antenna is evenly placed, the capacity is increased and the distribution is more uniform.