北京地区电视频段空域动态频谱接入机会测量与分析

Spatial Dynamic Spectrum Access Opportunities in TV Whitespace of Beijing

为探索在城市环境部署认知无线电设备的可行性，确定繁忙都市城区环境存在多少动态频率接人机会可以被利用，对北京地区470～806MHz电视电磁频段进行了移动测量和定点测量．经估算，18％的北京城区室内区域存在空域频谱利用机会．通过理论计算和实际平台设备验证得到在不干扰附近电视接收机条件下，室内电视频段认知无线电设备的最大发射功率．证明了即使在北京这样无线电业务繁忙的大都市市区，仍存在大量的潜在频谱利用机会，可供新兴的动态频谱接人技术利用．

It is reported the discovery of indoor spatial spectral holes in television white space based on the real measurement in the urban area of Beijing China. The report shows more than 18% urban indoor area of Beijing has spatial frequency holes, and proves that the observed spatial spectral holes can be used by cognitive radio users forming a low power short distance small cell without causing interference to nearby television receivers. The research on spatial spectral hole provides extensive spectrum access op- portunities for employing emerging dynamic spectrum access technology to meet the massive demands for future wireless services.