Title :
Property-restoral algorithms for blind equalization of OFDM
Author :
Jones, Douglas L.
Author_Institution :
Dept. of Electr. & Comput. Eng., Illinois Univ., Urbana, IL, USA
Abstract :
Adaptive blind equalization for OFDM can be difficult due to its nearly Gaussian marginal density. OFDM has unique properties, however, including constant mean block energy and zero-padded or circular-prefix guard bands, that allow blind equalization. The hybrid LMS/VCMA algorithms introduced here blindly restore the guard-band properties while maintaining a constant mean block energy. These simple, low-complexity adaptive algorithms demonstrate rapid convergence in simulations.
Keywords :
OFDM modulation; adaptive equalisers; blind equalisers; least mean squares methods; Gaussian marginal density; OFDM system; adaptive algorithm; adaptive blind equalization; circular-prefix guard band; hybrid LMS-vector constant modulus algorithm; least mean square algorithm; mean block energy; orthogonal frequency division multiplexing; property-restoral algorithm; zero-padded guard band; Adaptive algorithm; Adaptive equalizers; Adaptive filters; Bandwidth; Blind equalizers; Convergence; Least squares approximation; OFDM; Signal restoration; Statistics;
Conference_Titel :
Signals, Systems and Computers, 2004. Conference Record of the Thirty-Seventh Asilomar Conference on
Print_ISBN :
0-7803-8104-1
DOI :
10.1109/ACSSC.2003.1291985
