无线广播网MIMO信道模型及性能评估方法

Wireless Broadcasting MIMO Channel Models and Evaluation Methods of the Performance

ATSC组织通过实测,综合考虑了内径相关性、多普勒频移、莱斯因子以及交叉极化因子等因素对系统性能的影响,得到了移动场景和固定场景的广播网MIMO无线信道模型。而基于这两种场景的信道模型还没有统一的评估方法用于后续研究和优化。文中对这两种场景的信道模型进行了仿真,提出了这两种场景的相应评估方法。对于移动场景的Helsinki2信道模型,由于其移动的特性,选取一段时变信道作为一个仿真周期,评估其链路吞吐量性能。对于固定场景的MGM信道模型,测试50条静态信道,按95%的覆盖率来确定其信噪比区间,以此评估系统性能。文中对信道模型的系统仿真以及提出的评估方法,将对后续的研究和优化工作有重要作用。

ATSC obtained two broadcasting network MIMO channel models based on mobile and fixed scenari- os, with in consideration such factors as the intra-relation, Doppler frequency shift, and Lay factors. But the two channel models have not unified evaluation methods for further study and optimization about MIMO broadcasting net- work technology. This paper respectively simulates the two channel models presented by ATSC3.0 and provides corre- sponding evaluation methods, which are then adopted to evaluate the two scenarios of the channel model. For the Helsink2 channel Model based on mobile scenario, a length of time varying channel is selected as a period to evaluate its throughput. For the MGM channel model based on fixed scenario, 50 channels are tested and its range of SNR confirmed to evaluate performance. The evaluation methods and simulation of the two MIMO channel models will play an important role in the further study and optimization.