Probability-based optimization of inter-sensing duration and power control in cognitive radio

• Published in: IEEE transactions on wireless communications Vol. 8; no. 10; pp. 4922 - 4927
• Main Authors: Xiangwei Zhou, Jun Ma, Li, G.Y., Young Hoon Kwon, Soong, A.C.K.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.10.2009; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Applied sciences; Band spectra; Bandwidth efficiency; Chromium; Cognitive radio; Conferences; Detection, estimation, filtering, equalization, prediction; Exact sciences and technology; Global communication; Information, signal and communications theory; Interference; Optimization; Power control; Power system protection; Probability; Radio; Radiocommunication specific techniques; Radiocommunications; Signal and communications theory; Signal detection; Signal, noise; spectrum sensing; Statistics; Strategy; Telecommunications; Telecommunications and information theory; Wireless communication; Performance evaluation; Recurrence; cognitive radio; Power control; Bandwidth efficiency; spectrum sensing; Transmission rate; Signal detection; Optimization; Software radio
• ISSN: 1536-1276; 1558-2248
• DOI: 10.1109/TWC.2009.081061

Probability-based strategies are proposed in this letter to determine the optimal inter-sensing duration and power control for cognitive radio (CR). With utilization of the statistics of licensed band occupancy, appropriate inter-sensing duration is determined to capture the recurrence of spectrum opportunity in time when the licensed signal is detected, or to achieve the maximum spectrum efficiency under a certain level of interference with licensed communication when the licensed signal is declared absent. Transmit power is varied dynamically according to the non-interfering probability at each sample so as to increase the transmission rate and decrease the interference power.