Judicious power loading for a cognitive relay scenario

Nadkar, T and Thumar, V and Desai, U B and Merchant, S N (2009) Judicious power loading for a cognitive relay scenario. In: International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2009, 7-9 December, 2009, Kanazawa; Japan.

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This paper introduces a power loading strategy for relays to be used in a cognitive scenario. A cognitive relay node allows unlicensed (secondary) users to concurrently operate with licensed (primary) users, thereby improving spectral efficiency. The dynamic spectrum access in an OFDM-based cognitive relay network may lead to unwanted interference to the primary user from the side lobes of the secondary users. Two judicious algorithms are formulated by means of which the cognitive relay meets the twofold challenge of achieving optimum system throughput while ensuring minimum interference to the primary. The simulation results demonstrate that the suggested algorithms exhibit enhanced channel capacity for the secondary users as compared to traditional power allocation methods.

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IITH Creators:
IITH CreatorsORCiD
Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Cognitive radio; Interference; OFDM; Power loading; Relays
Subjects: Physics > Electricity and electronics
Divisions: Department of Electrical Engineering
Depositing User: Team Library
Date Deposited: 25 Nov 2014 08:13
Last Modified: 07 Aug 2015 06:41
URI: http://raiith.iith.ac.in/id/eprint/954
Publisher URL: http://dx.doi.org/10.1109/ISPACS.2009.5383836
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