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http://dx.doi.org/10.7840/KICS.2012.37A.1.8

Projection of Spatial Correlation-Based Antenna Selection for Cognitive Radio Systems in Correlated Channels  

Cho, Jae-Bum (인하대학교 정보통신공학과 무선전송 연구실)
Jang, Sung-Jeen (인하대학교 정보통신공학과 무선전송 연구실)
Jung, Won-Sik (인하대학교 정보통신공학과 무선전송 연구실)
Kim, Jae-Moung (인하대학교 정보통신공학과 무선전송 연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.37, no.1A, 2012 , pp. 8-16 More about this Journal
Abstract
Recent work has been shown that cognitive radio systems with multiple antenna at both transmitter and receiver are able to improve performance of secondary users. In such system, the main drawback is the increased complexity and raised cost as the number of antennas increase. It is desirable to apply antenna selection which select a subset of the available antennas so as to solve these problems. In this paper, we consider antenna selection method for cognitive radio systems in correlated channel from the IEEE 802.11n. For a multiple-input multiple-output(MIMO) system with more antennas at transmitter than the receiver, we select the same number of transmit antennas as that of receive antennas. The exhaustive search for optimal antenna becomes impractical. We present criterion for selecting subset in terms of projection of channel correlation vector to increase performance of secondary user with decreasing interference at primary user.
Keywords
MIMO; Cognitive Radio; Antenna Selection; Projection; Channel Correlation;
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