On the interplay between channel sensing and estimation in cognitive radio systems
Author
Gursoy, M.C.
Gezici, Sinan
Date
2011Source Title
2011 IEEE Global Telecommunications Conference - GLOBECOM 2011
Publisher
IEEE
Language
English
Type
Conference PaperItem Usage Stats
165
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137
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Abstract
Cognitive radio transmissions in the presence of channel uncertainty are considered. In practical scenarios, cognitive secondary users need to perform both channel sensing in order to identify whether the channel is being occupied by the primary users or not, and also channel estimation in order to learn the channel fading coefficients. Generally, errors occur in both channel sensing and estimation, and this leads to a coupling between the two. More specifically, imperfect sensing affects both the structure and the performance of channel estimation schemes. With this motivation, the interactions between channel sensing and estimation are studied in this paper. In particular, different channel estimation schemes including minimum mean-square error (MMSE), linear MMSE, and mismatched MMSE estimations are analyzed, and their dependence on sensing decisions and their performances are investigated. © 2011 IEEE.
Keywords
channel estimationchannel sensing
Cognitive radio
minimum mean-square error estimation
Channel fading
Channel sensing
Channel uncertainties
Minimum mean-square error
Minimum mean-square-error estimations
MMSE estimation
Channel estimation
Cognitive radio
Communication
Mean square error
Radio systems
Radio transmission
Estimation
Permalink
http://hdl.handle.net/11693/28299Published Version (Please cite this version)
http://dx.doi.org/10.1109/GLOCOM.2011.6133711Collections
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