Performance of collaborative spectrum sensing for cognitive radio in the presence of gaussian channel estimation errors

2009 ◽  
Vol 57 (7) ◽  
pp. 1944-1947 ◽  
Author(s):  
Yunfei Chen ◽  
N. Beaulieu
Keyword(s):  
Cognitive Radio ◽  
Channel Estimation ◽  
Spectrum Sensing ◽  
Gaussian Channel ◽  
Estimation Errors ◽  
Channel Estimation Errors ◽  
Collaborative Spectrum Sensing

scholarly journals Resource Allocation in a Cognitive Radio System with Imperfect Channel State Estimation

2010 ◽  
Vol 2010 ◽  
pp. 1-5 ◽  
Author(s):  
Tao Qin ◽  
Cyril Leung ◽  
Chunyan Miao ◽  
Zhiqi Shen
Keyword(s):  
Cognitive Radio ◽  
Channel Estimation ◽  
Orthogonal Frequency Division Multiplexing ◽  
Negative Impact ◽  
Radio Spectrum ◽  
Estimation Errors ◽  
Radio System ◽  
Channel Estimation Errors ◽  
Channel State Estimation ◽  
Cr System

Cognitive radio (CR) is a promising concept for improving the utilization of scarce radio spectrum resources. Orthogonal frequency division multiplexing (OFDM) is regarded as a technology which is well matched for CR systems. It is shown that channel estimation errors can result in a severe performance degradation in a multiuser OFDM CR system. A simple back-off scheme is proposed, and simulation results are provided which show that the proposed scheme is very effective in mitigating the negative impact of channel estimation errors.

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