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The concept of cognitive radio with many promising features like spectrum sensing, dynamic spectrum access has the potential to greatly improve the spectral efficiency. In this paper, we consider the problem of spectrum-hole sharing, i.e., vacant channel and power allocation to multiple cognitive radio (CR) users who coexist in a network. These CR users are equipped with multiple antennas at both...
Cognitive radio has been proposed as an innovative and effective technology to exploit the efficient reuse of the precious radio spectrum. In spectrum sensing which is a crucial step in cognitive radio networks, an adequate sensing range needs to be defined to avoid the hidden transmitter/receiver problems. Moreover, a secondary user may have unreliable detection of the existent primary users due...
The concept of spectrum sharing has received increasing interest in an attempt to alleviate the spectrum scarcity issue. In this paper, the problem of K pairs of cognitive radios sharing N available channels and its associated problem of optimal power allocation across users and channels are studied. A new metric indicating user satisfaction in both data rate and power consumption is formulated. Joint...
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