Title :
Blind ISI correction by using CMA
Author :
Pérez, Jorge Omar ; Ferrao, Hilda Noemí ; Sayago, Claudia F. ; Novotny, Wenceslao
Author_Institution :
Lab. de Procesamiento Digital de Informacion, Univ. Nac. de Tucuman, Tucuman, Argentina
Abstract :
In this work, a method of ISI correction by using the constant modulus algorithm, CMA, is presented. It consists of the introduction of an adjusting variable coefficient to improve the usually low speed of convergence of the classic CMA. An analytical justification is derived. The whole system has been computationally instrumented and extensively tested on a model of a dispersive-time varying-digital communication channel AWGN, with modulation QPSK for efficient ISI reduction. The experimental results are in accordance with the expected analytical estimations.
Keywords :
AWGN channels; blind equalisers; digital communication; dispersive channels; intersymbol interference; quadrature phase shift keying; time-varying channels; CMA; blind ISI correction; blind equalizer model; constant modulus algorithm; digital communication channel AWGN; dispersive-time varying channel; modulation QPSK; variable coefficient adjustment; AWGN; Adaptive filters; Blind equalizers; Convergence; Instruments; Intersymbol interference; Laboratories; Least squares approximation; Signal processing; Transmitters;
Conference_Titel :
Circuits and Systems, 2009. MWSCAS '09. 52nd IEEE International Midwest Symposium on
Conference_Location :
Cancun
Print_ISBN :
978-1-4244-4479-3
Electronic_ISBN :
1548-3746
DOI :
10.1109/MWSCAS.2009.5236018
