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INFOCOM
2010
IEEE
13 years 7 months ago
Efficient Resource Allocation with Flexible Channel Cooperation in OFDMA Cognitive Radio Networks
Recently, a cooperative paradigm for single-channel cognitive radio networks has been advocated, where primary users can leverage secondary users to relay their traffic. However, i...
Hong Xu, Baochun Li
TWC
2010
13 years 3 months ago
Reduced-complexity baseband compensation of joint Tx/Rx I/Q imbalance in mobile MIMO-OFDM
Direct-conversion multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) transceivers enjoy high data rates and reliability at practical implementati...
Balachander Narasimhan, Sudharshan Narayanan, Hlai...
CORR
2007
Springer
151views Education» more  CORR 2007»
13 years 9 months ago
Exploiting Multi-Antennas for Opportunistic Spectrum Sharing in Cognitive Radio Networks
—In cognitive radio (CR) networks, there are scenarios where the secondary (lower priority) users intend to communicate with each other by opportunistically utilizing the transmi...
Rui Zhang, Ying-Chang Liang
WINET
2008
94views more  WINET 2008»
13 years 9 months ago
Transmission costs, selfish nodes, and protocol design
We study how selfish nodes react to transmission costs in wireless networks. Intuitively, it seems that transmission costs should have a stabilizing effect as (rational) nodes will...
Peter Marbach
TSP
2010
13 years 3 months ago
Mitigating channel estimation error with timing synchronization tradeoff in cooperative communications
Channel estimation error and co-channel interference (CCI) problems are among the main causes of performance degradation in wireless networks. In this paper, we investigate the im...
Ahmed S. Ibrahim, K. J. Ray Liu