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Linear Precoding for the Downlink of Cognitive Radio Network
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In this paper, a multiple-input-single-output (MISO) overlay cognitive radio (CR) network is considered in which a primary base station (PBS) and a cognitive base station (CBS) share the same spectrum to transmit the information. We consider a novel linear precoding technique to cannel the interferences which is bring about by the CBS's transmission. Three theorems about the design of the precoding and decoding matrices are put forward. With the linear precoding and decoding, the BER performance of the PBS and CBS are improved significantly. At the same time, the capacity of the PBS and CBS channels are analyzed.
Multiple-input-single-output(MISO)OverlayCognitive radio (CR)PrecodinDecoding
PENGPENG LAN、YANG XIAO、JINFENG KOU
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Institute of Information Science, Beijing Jiaotong University
NSTL
