Potentials and limits of secondary spectrum usage by CDMA base stations
RWS'09 Proceedings of the 4th international conference on Radio and wireless symposium
Dynamic Spectrum Access and Management in Cognitive Radio Networks
Dynamic Spectrum Access and Management in Cognitive Radio Networks
Uplink capacity analysis for multihop TDD-CDMA cellular system
IEEE Transactions on Communications
IEEE Transactions on Wireless Communications
CDMA soft handoff analysis in the presence of power control error and shadowing correlation
IEEE Transactions on Wireless Communications
Cognitive radio in a frequency-planned environment: some basic limits
IEEE Transactions on Wireless Communications - Part 1
Joint rate and power allocation for cognitive radios in dynamic spectrum access environment
IEEE Transactions on Wireless Communications - Part 2
A survey on spectrum management in cognitive radio networks
IEEE Communications Magazine
Cognitive radio: brain-empowered wireless communications
IEEE Journal on Selected Areas in Communications
BER reduction in signal receivers towards greening of digital communications
International Journal of Communication Networks and Distributed Systems
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In this paper, the outage performance of a primary user (PU) is evaluated analytically in presence of a large number of secondary users (SUs) in an underlay spectrum sharing architecture. We consider cognitive users in ad hoc mode using the spectrum licensed for a cellular CDMA network. We develop an analytical framework for evaluation of downlink interference in our proposed cognitive radio CDMA (CR-CDMA) networking model. A closed form expression for the probability of outage for a PU assuming correlation amongst interferences caused by co-channel BSs and SUs has been derived. We study the impact of SUs and several other parameters (of channel and network) on the outage probability for a PU. Analytical results are validated with simulation results.