Blind Estimation of OFDM Parameters in Cognitive Radio Networks

Author

Punchihewa, A. ; Bhargava, Vijay K. ; Despins, Charles

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of British Columbia, Vancouver, BC, Canada

Volume

10

Issue

3

fYear

2011

fDate

3/1/2011 12:00:00 AM

Firstpage

733

Lastpage

738

Abstract

This paper presents a blind parameter estimation algorithm for orthogonal frequency division multiplexing (OFDM) signal affected by a time-dispersive channel, timing offset, carrier frequency offset and additive Gaussian noise. Unlike the previous studies, this paper presents the second-order cyclostationarity of OFDM signal considering the effect of time-dispersive channel. The cyclostationarity properties of received OFDM signal in time-dispersive channel is exploited to estimate the OFDM parameters. These parameters includes OFDM symbol period, useful symbol period, cyclic prefix factor, number of subcarriers and carrier frequency offset. Simulations are performed to investigate the performance of OFDM parameter estimation algorithm in diverse channel conditions.

Keywords

OFDM modulation; cognitive radio; frequency estimation; OFDM parameter estimation; OFDM symbol period; additive Gaussian noise; blind parameter estimation algorithm; carrier frequency offset; cognitive radio networks; cyclic prefix factor; diverse channel conditions; orthogonal frequency division multiplexing signal; second-order cyclostationarity; time-dispersive channel; timing offset; Blind estimation; cognitive radio; orthogonal frequency division multiplexing;

fLanguage

English

Journal_Title

Wireless Communications, IEEE Transactions on

Publisher

ieee

ISSN

1536-1276

Type

jour

DOI

10.1109/TWC.2010.010411.100276

Filename

5692892