A Leakage-Based Precoding Scheme for Cognitive Multiuser MIMO Systems
Intelligent Networking and Collaborative Systems（2012）
摘要
In this paper, we develop linear precoding schemes for cognitive radio (CR) multiuser multiple-input multiple-output (MU-MIMO) downlink systems. A secondary user base station (SBS) with multiple secondary users (SUs) sharing the primary user (PU) spectrum is considered. In the proposed scheme, the block diagonalization (BD) algorithm is adopted to remove the co-channel interference from the SBS to the PU completely, and the matching weighted signal-to-leakage-and-noise ratio (SLNR) maximization algorithm is proposed to mitigate interference between SUs. The proposed scheme does not require a strict restriction on the number of transmit and receive antennas. Simulation results show that the proposed scheme can achieve high sum rate throughput with affordable complexity.
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关键词
linear precoding schemes,multiuser multiple-input multiple-output downlink systems,co-channel interference,matching weighted signal-to-leakage-and-noise ratio maximization algorithm,block diagonalization algorithm,cr-mu-mimo downlink systems,bd algorithm,transmit antennas,transmitting antennas,mu-mimo,linear codes,precoding,cognitive radio,receiving antennas,maximization algorithm,cognitive multiuser mimo systems,primary user spectrum,antenna arrays,sbs,signal-to-leakage-and-noise ratio,cochannel interference,multiple secondary user,pu spectrum,leakage-based precoding scheme,mimo communication,proposed scheme,slnr algorithm,primary user,block diagonalization,receive antennas,linear precoding scheme,secondary user base station,affordable complexity,multiple secondary users,downlink,mu mimo,scattering,signal to noise ratio,vectors,mimo,interference
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