Spatial Multiplexing Algorithms of Cognitive Base-Stations
The existing cognitive network can not provide the spatial sectors for a cell, since the base-station (BS) has one omnidirectional antenna. Thus it is impossible for a base-band channel to be shared by several mobile stations(MSs) with one omni-directional antenna. To solve the problem, this paper proposes the spatial multiplexing algorithms for transmitter and receiver of cognitive BS. In the proposed scheme, the cognitive BS has a uniform circular array (UCA) with 8 elements, it can provide five nearly orthogonal sectors for MSs, and a base-band channel can be shared by 5 sectors, but the MS has one omni-directional antenna only, and simple transmitter and receiver. The experimental results verify that the proposed algorithms are able to increase the cellular capacity to nearly 5 times with low co-channel interference, and the co-channel interference also can be canceled by LDPC codec.
Index Terms— UCA Cognitive Network Cell sectorization SDMA
Yang Xiao Ying-kang Zhang Guangzhi Qu Kiseon Kim
Institute of Information Science, Beijing Jiaotong University, Beijing, China Dept.of Engineering and Computer Science, Oakland University, Rochester, MI48309, USA Dept.of Information and Communications,Gwangju Institute of Science and Technology Gwangju 500-712,
国际会议
北京
英文
221-224
2010-09-26（万方平台首次上网日期，不代表论文的发表时间）