室内环境下共用收发天线同时同频全双工自干扰信道测量与建模

同时同频全双工技术因能获得更高的信道容量及频谱利用率而得到人们的关注。目前,对单天线收发全双工自干扰信道特性的研究尚未见到。针对此现状,采用基于网络分析仪的信道测量平台,对室内环境下 2.6 GHz共用收发天线全双工自干扰信道进行测量与分析。得到了均方根时延扩展与相关带宽的统计模型。分析了天线馈线长度与损耗对自干扰信道的均方根时延扩展造成的影响。结果表明,均方根时延扩展服从对数正态分布;相关带宽大致服从正态分布;相关带宽与均方根时延扩展基本成反比关系;均方根时延扩展随着天线馈线长度的增加而增加。

Measurement and modeling of co-time co-frequency single antenna full duplex self interference channel in indoor environment

The utilization of the spectrum can be improved by using the technologies of co-time co-frequency full duplex (CCFD) in theory, which has attracted many attentions by researchers. Measurements and characterizations are rarely involved at indoor single antenna self interference channel of CCFD. Measurements and analyses are performed at 2.6 GHz under typical indoor environment with channel sounder based on vector network analyzer. By analyzing the measurement data, the empirical channel characteristics such as the RMS delay spread and the coherence bandwidth have been extracted. The impacts of the feed line of antenna on the root mean square (RMS) delay are studied. Results show that the statistics of RMS delay follow lognormal distribution. The RMS delay increases with increasing the length of the feed line. The statistics of coherence bandwidth follow normal distribution. It has been confirmed that an inverse relation between the coherence bandwidth and the RMS delay spread.