On the interplay between channel sensing and estimation in cognitive radio systems
GLOBECOM - IEEE Global Telecommunications Conference
MetadataShow full item record
Please cite this item using this persistent URLhttp://hdl.handle.net/11693/28299
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.
Showing items related by title, author, creator and subject.
Theoretical limits and a practical estimator for joint estimation of respiration and heartbeat rates using UWB impulse radio Gezici, S.; Ankan O. (2007)In this paper, Cramer-Rao lower bounds are derived fo r joint estimation of respiration and heartbeat rates via impulse radio ultra-wideband signals. Generic models are employed for displacement functions due to respiration ...
Gezici, S.; Celebi H.; Arslan H.; Poor H.V. (2008)In this paper, theoretical limits on time delay estimation are studied for ultra-wideband (UWB) cognitive radio systems. For a generic UWB spectrum with dispersed bands, the Cramer-Rao lower bound (CRLB) is derived for ...
A novel array signal processing technique for multipath channel parameter estimation [Çokyollu kanal parametre kestirimi için yeni bir dizilim sinyal i̇şleme tekniǧi] Güldoǧan, M.B.; Arikan, O. (2007)In this paper, a new array signal processing technique, which make use of the cross ambiguity function calculation, is proposed. Developed technique estimates direction of arrival (DOA), time delay, Doppler shift and ...