Feedback Bits Allocation for Interference Minimization in Cognitive Radio Communications

被引：7

作者：

Kibria, Mirza Golam ^{[1
]}

Yuan, Fang ^{[2
]}

Kojima, Fumihide ^{[1
]}

机构：

[1] Natl Inst Informat & Commun Technol NICT, Wireless Network Res Inst, Yokosuka, Kanagawa 2390847, Japan

[2] Natl Inst Informat & Commun Technol NICT, Wireless Network Res Inst, Yokosuka, Kanagawa 2390839, Japan

来源：

IEEE WIRELESS COMMUNICATIONS LETTERS | 2016年 / 5卷 / 01期

关键词：

Cognitive radio; Bit allocation; Interference; NETWORKS; CHANNELS;

D O I：

10.1109/LWC.2015.2503771

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

This letter studies the limited feedback cognitive radio system, where the primary users (PUs) are interfered by the secondary transmitter (ST) due to the imperfect beamforming. We propose allocating the feedback bits among multiple PUs to minimize the maximum interference caused by the ST, by exploiting the heterogeneous average channel gains. In addition, we study the problem of minimizing the total feedback bits under a pre-defined interference threshold at the PUs. The solutions with low complexity are proposed for the studied problems, and the performances of bit allocations are analyzed. Simulation results validate our analysis and demonstrate that the proposed solutions work very well in terms ofminimizing the maximum interference caused by the ST and minimizing the total feedback bits under pre-defined interference threshold at the PUs for limited feedback CR system.

引用

页码：104 / 107

页数：4

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