255 search results - page 25 / 51 » Channel Interference in IEEE 802.11b Systems |
157
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PIMRC
2010
IEEE
15 years 2 months ago
2010
IEEE
We propose an opportunistic channel access scheme for cognitive radio-enabled secondary networks. In our work, we model the channel occupancy due to Primary User (PU) activity as a...
164
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GLOBECOM
2007
IEEE
15 years 8 months ago
2007
IEEE
In this paper, we consider a MIMO wireless relay network where communication between a source and a destination node is assisted by multiple relay nodes using the Amplifyand-Forwar...
137
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ICASSP
2011
IEEE
14 years 8 months ago
2011
IEEE
A weighted sum-rate maximization problem is considered for an access point (AP) allocating resources to wireless cognitive radios (CRs) communicating using orthogonal frequency-di...
179
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PIMRC
2010
IEEE
15 years 2 months ago
2010
IEEE
This paper presents an efficient and fair uplink resource allocation algorithm in multicarrier based cognitive radio systems. The proposed resource allocation is divided into two s...
150
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ICC
2007
IEEE
15 years 8 months ago
2007
IEEE
Abstract-- This paper concerns the multiple access performance of spreading codes used in the downlink of multicarrier code-division multiple-access (MC-CDMA). Complex-valued sprea...