点击次数：

论文类型： 期刊论文

发表时间： 2015-08-01

发表刊物： IEEE COMMUNICATIONS LETTERS

收录刊物： SCIE、EI、Scopus

卷号： 19

期号： 8

页面范围： 1442-1445

ISSN号： 1089-7798

关键字： Cognitive radio; interference alignment; quality of service; rayleigh quotient; spectrum sharing

摘要： Interference alignment (IA) can effectively eliminate the interference among users in cognitive radio (CR) networks. Nevertheless, to further increase the transmission rate of the primary user (PU) and guarantee its priority, we propose an optimal transceiver design (OTD) scheme for IA-based CR networks in this letter. In the OTD scheme, two partial-IA based algorithms are proposed to design the precoding matrices of SUs, in which the interference is aligned at the primary receiver with much lower overhead and complexity. Then the PU's precoding matrix is designed to maximize its throughput accordingly. To further improve the performance of SUs, their decoding matrices are re-designed. Simulation results are presented to show the effectiveness of the proposed scheme.