OFDM for cognitive radio: merits and challenges

Authors:
Hisham A. Mahmoud;Tevfik Yücek;Hüseyin Arslan
Affiliations:
University of South Florida;University of South Florida;University of South Florida
Venue:
IEEE Wireless Communications
Year:
2009

Citing 7
Cited 12

Transceiver design for multiband OFDM UWB

EURASIP Journal on Wireless Communications and Networking
A robust adaptive beamformer for microphone arrays with a blockingmatrix using constrained adaptive filters

IEEE Transactions on Signal Processing
Utilization of Location Information in Cognitive Wireless Networks

IEEE Wireless Communications
Cognitive Positioning Systems

IEEE Transactions on Wireless Communications
Spectrum pooling: an innovative strategy for the enhancement of spectrum efficiency

IEEE Communications Magazine
Multiuser OFDM with adaptive subcarrier, bit, and power allocation

IEEE Journal on Selected Areas in Communications
Cognitive radio: brain-empowered wireless communications

IEEE Journal on Selected Areas in Communications

Channel fragmentation in dynamic spectrum access systems: a theoretical study

Proceedings of the ACM SIGMETRICS international conference on Measurement and modeling of computer systems
ICI-minimizing blind uplink time synchronization for OFDMA-based cognitive radio systems

GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Efficient resource allocation algorithm for cognitive OFDM systems

IEEE Communications Letters
An architecture for software defined cognitive radio

Proceedings of the 6th ACM/IEEE Symposium on Architectures for Networking and Communications Systems
Secondary transceiver design in the presence of frequency offset between primary and secondary systems

IEEE Transactions on Wireless Communications
Streaming scalable videos over multi-hop cognitive radio networks

IEEE Transactions on Wireless Communications
Resource allocation for multiuser cognitive OFDM networks with proportional rate constraints

International Journal of Communication Systems
A performance analysis of channel fragmentation in dynamic spectrum access systems

Queueing Systems: Theory and Applications
Evolutionary algorithms for orthogonal frequency division multiplexing-based dynamic spectrum access systems

Computer Networks: The International Journal of Computer and Telecommunications Networking
Second order suboptimal power allocation for OFDM-based cognitive radio systems

Proceedings of the 7th International Conference on Ubiquitous Information Management and Communication
A Framework to Optimize the OFDM-Based Multiuser Dynamic Spectrum Access Networks with Frequency Reuse

Wireless Personal Communications: An International Journal
Improving Water-Filling Algorithm to Power Control Cognitive Radio System Based Upon Traffic Parameters and QoS

Wireless Personal Communications: An International Journal

Quantified Score

Hi-index	0.00

Visualization

Abstract

Cognitive radio is a novel concept that enables wireless systems to sense the environment, adapt, and learn from previous experience to improve the quality of the communication. However, CR requires a flexible and adaptive physical layer in order to perform the required tasks efficiently. In this article, CR systems and their requirement of a physical layer are discussed, and the orthogonal frequency division multiplexing technique is investigated as a candidate transmission technology for CR. The challenges that arise from employing OFDM in CR systems are identified. The cognitive properties of some OFDM-based wireless standards also are discussed to indicate the trend toward a more cognitive radio.