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Random Transmission in Cognitive Uplink Network

Authors:
Swagato Barman Roy
Shabbir N Merchant
As Madhukumar

Keywords: Broadcast Scheduling; Cognitive Radio; Interference Channel; MIMO Channel; Multiple Access Interference.

Abstract:
To meet the ever increasing demand for higher data rate, improving spectral efficiency is absolutely essential. Spectrum sharing between several users has been proposed for maximum utilisation of available bandwidth. But whenever multiple users are using the same frequency band and at same time, they are going to interfere with each other resulting in poorer performance as compared to single user scenario. This work proposes a novel scheme for channel capacity improvement in Multiple Access Systems (Uplink Communication) in cognitive radio networks and explores the trade offs involved among the cognitive users and primary user. It is argued that, when the mobile transmitters lack the channel state information, they can't use the broadcast scheduling algorithm to cooperate with each other. Convex-concave properties of the data rate is used to find the appropriate bounds. The corresponding scenario with Broadcast Systems (Downlink Communication) is compared where the transmitter has perfect knowledge of the channel state information.

Pages: 94 to 98

Copyright: Copyright (c) IARIA, 2013

Publication date: November 17, 2013

Published in: conference

ISSN: 2308-3468

ISBN: 978-1-61208-313-1

Location: Lisbon, Portugal

Dates: from November 17, 2013 to November 21, 2013