An MMSE Overlay Cognitive Wireless System

In this paper, the authors propose a framework that allows an overlay (new) system to operate simultaneously with a legacy (existing) system. By jointly optimizing the transmitter and the receiver filters of the overlay system, the sum of the mean-squared error (MSE) of the new system plus the exces...

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Bibliographic Details
Published inInternational journal of interdisciplinary telecommunications and networking Vol. 4; no. 4; pp. 64 - 76
Main Authors Vameghestahbanati, Monirosharieh, Mir, Hasan S, El-Tarhuni, Mohamed
Format Journal Article
LanguageEnglish
Published Hershey IGI Global 01.10.2012
Subjects
Channels
Communications equipment
Estimates
Legacy
Optimization
Permissible error
Receivers
Signal to noise ratio
Telecommunication systems
Transmitters
United Arab Emirates
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Summary:In this paper, the authors propose a framework that allows an overlay (new) system to operate simultaneously with a legacy (existing) system. By jointly optimizing the transmitter and the receiver filters of the overlay system, the sum of the mean-squared error (MSE) of the new system plus the excess MSE in the existing system due to the introduction of the overlay system is minimized. The effects of varying key parameters such as the overlay transmitter power and the amount of overlap between the legacy and the overlay systems are investigated. Furthermore, the sensitivity of the system to accuracy of signal-to-noise ratio (SNR) estimate and the channel estimate is also examined.
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ISSN:1941-8663
1941-8671
DOI:10.4018/jitn.2012100105