TY - JOUR
T1 - A subcarriers allocation scheme for cognitive radio systems based on multi-carrier modulation
AU - Luo, Tao
AU - Jiang, Tao
AU - Xiang, Weidong
AU - Chen, Hsiao Hwa
N1 - Funding Information:
Manuscript received April 7, 2007; revised June 16, 2007; accepted August 6, 2007. The associate editor coordinating the review of this letter and approving it for publication was A. Gulliver. The work presented in this paper was supported in parts by research grants No. NSFC-60472070 and NSFC-60672123 from National Natural Science Foundation, Key Project of Chinese Ministry of Education under grant No. 105035, Specialized Research Fund for the Doctoral Program of Higher Education under grant No. 20050013005, China, and Research grant NSC 97-2219-E-006-004 from National Science Council, Taiwan.
PY - 2008/9
Y1 - 2008/9
N2 - Cognitive radio (CR) is a dynamic spectrum access technology as a solution to spectrum under-utilization problem in some licensed bands. Operating over an exceedingly wide spectrum, CR systems usually adopt multi-carrier modulation (MCM) to implement flexible channelization. Consequently, efficient channel allocation scheme becomes extremely important to an MCM based CR (MCM-CR) system. In this paper, a maximum likelihood detection model is developed to detect the presence and locations of licensed users (LUs) signals in the frequency domain. Performance of the detection model, including the optimal detection region, detection probability and false alarm probability, is analyzed. A one-order two-state Markovian chain model is proposed to predict channel status information. In particular, a novel subcarrier allocation scheme for MCM-CR systems is proposed, taking into account the confidence of channel estimation, quality of services (QoS) of rental users (RUs) and throughput To validate the analytical results, simulations have been conducted to show effectiveness of the proposed scheme.
AB - Cognitive radio (CR) is a dynamic spectrum access technology as a solution to spectrum under-utilization problem in some licensed bands. Operating over an exceedingly wide spectrum, CR systems usually adopt multi-carrier modulation (MCM) to implement flexible channelization. Consequently, efficient channel allocation scheme becomes extremely important to an MCM based CR (MCM-CR) system. In this paper, a maximum likelihood detection model is developed to detect the presence and locations of licensed users (LUs) signals in the frequency domain. Performance of the detection model, including the optimal detection region, detection probability and false alarm probability, is analyzed. A one-order two-state Markovian chain model is proposed to predict channel status information. In particular, a novel subcarrier allocation scheme for MCM-CR systems is proposed, taking into account the confidence of channel estimation, quality of services (QoS) of rental users (RUs) and throughput To validate the analytical results, simulations have been conducted to show effectiveness of the proposed scheme.
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U2 - 10.1109/TWC.2008.070372
DO - 10.1109/TWC.2008.070372
M3 - Article
AN - SCOPUS:52349087204
SN - 1536-1276
VL - 7
SP - 3335
EP - 3340
JO - IEEE Transactions on Wireless Communications
JF - IEEE Transactions on Wireless Communications
IS - 9
M1 - 4626307
ER -