论文部分内容阅读
过去三年,美国伍斯特理工学院无线创新实验室(Wireless Innovation Lab)的研究人员一直在测量频谱利用状况,寻找空隙。2009年6月12日,美国全面转向数字电视,而日益增加的无线服务需求是这背后的因素之一。这次切换释放了以前由
In the past three years, researchers at the Wireless Innovation Lab at Worcester Polytechnic Institute have been measuring the spectrum utilization and looking for gaps. June 12, 2009, the United States turned to digital television, and the increasing demand for wireless services is one of the factors behind this. This switch was released before