Slow adaptive M-QAM under third-party received signal constraints in shadowing environments
Research Letters in Communications - Regular issue
Adaptive power allocation with quality-of-service guarantee in cognitive radio networks
Computer Communications
Low-complexity centralized joint power and admission control in cognitive radio networks
IEEE Communications Letters
Multi-user diversity in a spectrum sharing system
IEEE Transactions on Wireless Communications
IEEE Transactions on Wireless Communications
IEEE Transactions on Wireless Communications
IEEE Transactions on Wireless Communications
Capacity and energy efficiency of multi-user spectrum sharing systems with opportunistic scheduling
IEEE Transactions on Wireless Communications
Weighted sum rate optimization for cognitive radio MIMO broadcast channels
IEEE Transactions on Wireless Communications
Interference reduction in cognitive networks via scheduling
IEEE Transactions on Wireless Communications
Robust cognitive beamforming with partial channel state information
IEEE Transactions on Wireless Communications
Opportunistic underlay transmission in multi-carrier cognitive radio systems
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
Power, sensing time, and throughput tradeoffs in cognitive radio systems: a cross-layer approach
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
Optimal subcarrier and power allocation under interference temperature constraints
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
On ergodic sum capacity of fading cognitive multiple-access and broadcast channels
IEEE Transactions on Information Theory
Robust cognitive beamforming with bounded channel uncertainties
IEEE Transactions on Signal Processing
Upper bound on the capacity of cognitive radio without cooperation
IEEE Transactions on Wireless Communications
IEEE Transactions on Wireless Communications
Capacity enhancement of secondary links through spatial diversity in spectrum sharing
IEEE Transactions on Wireless Communications
Robust beamforming in cognitive radio
IEEE Transactions on Wireless Communications
On the statistics of cognitive radio capacity in shadowing and fast fading environments
IEEE Transactions on Wireless Communications
IEEE Transactions on Communications
Exploiting interference diversity gain in frequency domain: the UMTS LTE scenario
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Channel capacity limits of cognitive radio with imperfect channel knowledge
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Achievable capacity of a spectrum sharing system over hyper fading channels
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Protecting primary users in cognitive radio networks: peak or average interference power constraint?
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Optimal power allocation for cognitive radio under primary users outage loss constraint
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Level crossing rates of interference in cognitive radio networks
IEEE Transactions on Wireless Communications
Secure communication over MISO cognitive radio channels
IEEE Transactions on Wireless Communications
IEEE Transactions on Wireless Communications
Fading cognitive multiple access channels: outage capacity regions and optimal power allocation
IEEE Transactions on Wireless Communications
Asilomar'09 Proceedings of the 43rd Asilomar conference on Signals, systems and computers
Study on power and rate control algorithm for cognitive wireless networks
WSEAS TRANSACTIONS on COMMUNICATIONS
Cognitive radio protocols based on exploiting hybrid ARQ retransmissions
IEEE Transactions on Wireless Communications
IEEE Transactions on Communications
IEEE Transactions on Wireless Communications
Temporal spectrum sharing based on primary user activity prediction
IEEE Transactions on Wireless Communications
Energy-efficient and low-complexity schemes for uplink cognitive cellular networks
IEEE Communications Letters
Resource allocation for mitigating the effect of sensing errors in cognitive radio networks
IEEE Communications Letters
Joint Subchannel, Rate and Power Allocation in OFDMA-Based Cognitive Wireless Mesh Network
Wireless Personal Communications: An International Journal
Energy Efficient Wireless Networks Towards Green Communications
Wireless Personal Communications: An International Journal
Spectrum sharing in cognitive radio networks: impacts of interference power constraints
Proceedings of the 4th International Conference on Cognitive Radio and Advanced Spectrum Management
Proceedings of the 4th International Conference on Cognitive Radio and Advanced Spectrum Management
Journal of Signal Processing Systems
Concurrency and Computation: Practice & Experience
Capacity limits of spectrum-sharing systems over hyper-fading channels
Wireless Communications & Mobile Computing
Performance Analysis of Cognitive Radio Multiple-Access Channels Over Dynamic Fading Environments
Wireless Personal Communications: An International Journal
Impact of Quality of Service Constraints on the Performance of Spectrum Sharing Cognitive Users
Wireless Personal Communications: An International Journal
Ergodic Sum Rate Maximization for Underlay Spectrum Sharing with Heterogeneous Traffic
Wireless Personal Communications: An International Journal
Performance of Cognitive Radios in Dynamic Fading Channels Under Primary Outage Constraint
Wireless Personal Communications: An International Journal
Wireless Personal Communications: An International Journal
Wireless Personal Communications: An International Journal
Wireless Personal Communications: An International Journal
Sensing Confidence Level-Based Joint Spectrum and Power Allocation in Cognitive Radio Networks
Wireless Personal Communications: An International Journal
Hi-index | 0.07 |
Traditionally, the frequency spectrum is licensed to users by government agencies in a rigid manner where the licensee has the exclusive right to access the allocated band. Therefore, licensees are protected from any interference all the time. From a practical standpoint, however, an unlicensed (secondary) user may share a frequency band with its licensed (primary) owner as long as the interference it incurs is not deemed harmful by the licensee. In a fading environment, a secondary user may take advantage of this fact by opportunistically transmitting with high power when its signal, as received by the licensed receiver, is deeply faded. In this paper we investigate the capacity gains offered by this dynamic spectrum sharing approach when channels vary due to fading. In particular, we quantify the relation between the secondary channel capacity and the interference inflicted on the primary user. We further evaluate and compare the capacity under different fading distributions. Interestingly, our results indicate a significant gain in spectrum access in fading environments compared to the deterministic case