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Generalized Equalization Algorithm Utilizing Improper ISI

Lookup NU author(s): Dr Pei Xiao, Emeritus Professor Rolando Carrasco



The improper nature of intersymbol interference (ISI) for signals transmitted over frequency-selective channels is investigated in this paper. Our analysis reveals that for real signals, the improperness originates from both improper signal modulation and the interference cancellation process, whereas for most complex signals, the improperness is only a characteristic of the residual ISI due to interference cancellation. To utilize the improperness of ISI, a multistage widely linear equalization algorithm is introduced, and it is generally applicable for both real and complex signal constellations. The results reveal that accounting for the improper nature of the ISI at both the input and output of the equalizer leads to a noticeable performance gain compared with conventional equalization schemes.

Publication metadata

Author(s): Xiao P, Carrasco RA, Wassell IJ

Publication type: Article

Publication status: Published

Journal: IEEE Transactions on Vehicular Technology

Year: 2009

Volume: 58

Issue: 2

Pages: 788-799

Date deposited: 08/03/2010

ISSN (print): 0018-9545

ISSN (electronic): 1939-9359

Publisher: IEEE


DOI: 10.1109/TVT.2008.927727


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