TY - GEN
T1 - On the interplay between channel sensing and estimation in cognitive radio systems
AU - Gursoy, Mustafa Cenk
AU - Gezici, Sinan
PY - 2011
Y1 - 2011
N2 - 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.
AB - 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.
KW - Cognitive radio
KW - channel estimation
KW - channel sensing
KW - minimum mean-square error estimation
UR - http://www.scopus.com/inward/record.url?scp=84857214914&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84857214914&partnerID=8YFLogxK
U2 - 10.1109/GLOCOM.2011.6133711
DO - 10.1109/GLOCOM.2011.6133711
M3 - Conference contribution
AN - SCOPUS:84857214914
SN - 9781424492688
T3 - GLOBECOM - IEEE Global Telecommunications Conference
BT - 2011 IEEE Global Telecommunications Conference, GLOBECOM 2011
T2 - 54th Annual IEEE Global Telecommunications Conference: "Energizing Global Communications", GLOBECOM 2011
Y2 - 5 December 2011 through 9 December 2011
ER -