Title :
Tracking performance analysis of fractional lower order constant modulus algorithm
Author :
Li, S. ; Qiu, T. Sh
Author_Institution :
Electron. & Inf. Eng. Coll., Dalian Univ. of Technol., Dalian
Abstract :
The fractional lower-order constant modulus algorithm (FLOS_CMA) has been proven to be an effective blind equalisation method under alpha-stable noise. But there have been few results in the literature about its performance. The tracking performance of the FLOS_CMA in non-stationary environments is studied. The approximate expression is derived based on the energy-preserving relation and Taylor series expansion. Based on the derived expression, an estimate is obtained for the FLOS_CMA step-size interval to ensure its convergence and stability, when it is initialised sufficiently close to the zero-forcing solution. Simulation studies have been undertaken to support the analysis.
Keywords :
Gaussian noise; blind equalisers; tracking; FLOS_CMA step-size interval; Taylor series expansion; alpha-stable noise; blind equalisation method; fractional lower order constant modulus algorithm; tracking performance analysis; zero-forcing solution;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2009.0561