BD precoding schemes for cognitive MIMO system

Author

Zhang, Caihong ; Guo, Li

Author_Institution

Lab. of Digital Signal Process., Beijing Univ. of Posts & Telecommun., Beijing, China

fYear

2009

fDate

6-8 Nov. 2009

Firstpage

11

Lastpage

15

Abstract

This paper focuses on pre-coding schemes for the downlink of multiple user multi-input multi-output (MU-MIMO) system in cognitive radio (CR) network. The spectrum band can be utilized by allowing a number of cognitive users to coexist with primary users (PUs) through a pre-coding scheme. The capacity problems maximize the sum rate of CUs subject to the interference constraint for PUs and total transmitted power constraint can be solved with high complexity. To simplify the problem, this paper presents two suboptimal pre-coding schemes that pre-cancel the co-channel interference to PUs as well as mitigate interference between cognitive users (CUs). Simulation results show that the two suboptimal algorithms are able to achieve high sum rate throughput with low complexity.

Keywords

MIMO communication; cochannel interference; cognitive radio; BD precoding schemes; co-channel interference; cognitive MIMO system; cognitive radio network; multiple user multi-input multi-output system; pre-coding schemes; Chromium; Cognitive radio; Digital signal processing; Downlink; Interchannel interference; Interference constraints; Laboratories; MIMO; Radio spectrum management; Throughput; BD; MU-MIMO; cognitive radio; pre-coding;

fLanguage

English

Publisher

ieee

Conference_Titel

Network Infrastructure and Digital Content, 2009. IC-NIDC 2009. IEEE International Conference on

Conference_Location

Beijing

Print_ISBN

978-1-4244-4898-2

Electronic_ISBN

978-1-4244-4900-6

Type

conf

DOI

10.1109/ICNIDC.2009.5360966

Filename

5360966