NDLI: Outage Capacity Optimization for Cognitive Radio Networks with Cooperative Transmissions via Discrete Stochastic Optimization

Content Provider	IEEE Xplore Digital Library
Author	Renchao Xie Yu, F.R. Hong Ji
Copyright Year	2011
Abstract	Cognitive radio networks with cooperative transmission could effectively improve the spectrum efficiency and data rate. Under this network scenario, based on the sensing results and the channel quality on all channels, there are three possible transmission modes: direct transmission, multi-hop transmission and cooperative transmission. To optimize the system performance, three issues should be carefully considered: whether or not and which relay is needed, which channel is selected, and which transmission mode is used. Therefore, in this paper, we solve these three problems jointly to optimize the outage capacity for cognitive radio networks with cooperative transmission. Specifically, we emphasize on the imperfect channel sensing condition. We formulate the optimization problem as a discrete optimization problem. Then an efficient algorithm based on a discrete stochastic optimization algorithm is proposed to maximize the outage capacity to determine the relay and select the optimal channel and transmission mode. Simulation results are presented to demonstrate the performance of the proposed scheme.
Starting Page	1
Ending Page	5
File Size	155417
Page Count	5
File Format	PDF
ISBN	9781424492664
ISSN	1930529X
e-ISBN	9781424492688
e-ISBN	9781424492671
DOI	10.1109/GLOCOM.2011.6133594
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-12-05
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Relays Sensors Cognitive radio Optimization Channel estimation Signal to noise ratio Approximation algorithms
Content Type	Text
Resource Type	Article

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