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针对室内多径信道,提出一种研究系统信道容量的方法,利用结合信道特征设计的三维多极化测量系统测量信道中多径入射信号的三维空间分布,代入天线方向图与入射信号进行空间积分计算出系统容量。利用该方法和系统对典型室内环境进行了测量,研究了真实的三极化天线组成的MIMO(multiple-input-multiple-output)系统的容量和摆放方向对多极化天线系统容量的影响。结果表明:三极化系统具有比单极化系统更优越的性能,可以利用该特性对室内环境中多极化MIMO系统的设计和布局进行优化以实现更高的系统容量。
Aiming at indoor multipath channel, a method to study the channel capacity of the system is proposed. The three-dimensional multipolarization measurement system designed with channel features is used to measure the three-dimensional spatial distribution of multipath incident signals in the channel. The spatial pattern is integrated into the antenna pattern and the incident signal. Calculate the system capacity. A typical indoor environment was measured by this method and system, and the effect of capacity and placement of a MIMO-MIMO system on the capacity of multi-polarization antenna system was studied. The results show that the three-polarization system has more superior performance than the unipolar system, which can be used to optimize the design and layout of the multi-polarization MIMO system in the indoor environment to achieve higher system capacity.