Adaptive filter theory (2nd ed.)
Adaptive filter theory (2nd ed.)
Microwave Mobile Communications
Microwave Mobile Communications
Adaptive OFDM Systems With Imperfect Channel State Information
IEEE Transactions on Wireless Communications
Fundamental limits of spectrum-sharing in fading environments
IEEE Transactions on Wireless Communications
Joint power control and beamforming for cognitive radio networks
IEEE Transactions on Wireless Communications
IEEE Transactions on Wireless Communications
On Capacity Under Receive and Spatial Spectrum-Sharing Constraints
IEEE Transactions on Information Theory
Limits on communications in a cognitive radio channel
IEEE Communications Magazine
Capacity limits of cognitive radio with distributed and dynamic spectral activity
IEEE Journal on Selected Areas in Communications
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Power control plays a critical role in cognitive radio (CR) system to achieve a balance between efficient sharing of licensed spectrum and interferences to primary system (PU). Most of the existing works considered power control under perfect knowledge of system state (such as channel state information (CSIT) and sensing information (SIT)). In this paper, we shall focus on the design and analysis of power control scheme under imperfect knowledge of system state for SISO and OFDM systems. We obtained asymptotically optimal power control policy, taking into account of imperfect system state knowledge and packet errors due to channel outage. In addition, we found that system parameters affect asymptotic average goodput by O(-ln(ρpRp)e -σe2/1-σe2 and O(e-ρpRp e-σe2/1-σe2) under low and high PU activities respectively where ρpRp, σe2 represents PU activity level and CSIT quality respectively.