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Wireless Personal Communications
Published in: Wireless Personal Communications 4/2013

01-10-2013

Novel Finite Summation Expressions for Total Interference Power due to Carrier Frequency Offset in Uplink Multiuser OFDM Systems

Authors: Porselvi Soundararajan, Vidhyacharan Bhaskar

Published in: Wireless Personal Communications | Issue 4/2013

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Abstract

Carrier Frequency Offset which poses adverse threats in uplink Multiuser OFDM systems induces Inter-Carrier Interference (ICI) and Multiuser Interference (MUI). It is very essential that the power of ICI and MUI is calculated precisely. In previous work, the total interference power was presented in an indefinite integral form or as an infinite series. Further, an ideal channel was the scenario under consideration in earlier work. In this paper, novel finite summation expressions for power of ICI and MUI are derived over slowly fading channels which make the calculation of total interference simpler for any number of users by just specifying the total number of users and the number of subcarriers allotted for each user. Based on the mean of the dominant signal and the total interference power experienced in the system, closed-form expressions for mean and variance of the desired signal in uplink multiuser OFDM system are obtained which provide an idea of the strength of the desired signal. Finite-sum expressions for the total interference power, and closed-form expressions for mean and variance of the desired signal under Rayleigh, Weibull and Nakagami fading channels are derived and plotted from which the response of the system can be understood perfectly.
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Metadata
Title
Novel Finite Summation Expressions for Total Interference Power due to Carrier Frequency Offset in Uplink Multiuser OFDM Systems
Authors
Porselvi Soundararajan
Vidhyacharan Bhaskar
Publication date
01-10-2013
Publisher
Springer US
Published in
Wireless Personal Communications / Issue 4/2013
Print ISSN: 0929-6212
Electronic ISSN: 1572-834X
DOI
https://doi.org/10.1007/s11277-013-1168-y

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