Title :
Blind FIR equalisation for high-order QAM signalling
Author :
Chen, S. ; Cook, T.B. ; Anderson, L.C.
Author_Institution :
Dept. of Electron. & Comput. Sci., Southampton Univ., UK
Abstract :
We compare some blind finite-impulse-response (FIR) equalisation schemes for high-order quadrature amplitude modulation (QAM) signalling. The popular constant modulus algorithm (CMA) is used as a benchmark in an investigation of two blind FIR equalisers, namely, a bootstrap maximum a posteriori probability (MAP) equaliser and a recently introduced concurrent CMA and decision directed (DD) equaliser (CMA+DD). Both equalisers are known to outperform the CMA considerably at costs of a small increase in computational complexity. Our study indicates that the bootstrap MAP equaliser has a faster convergence rate than the concurrent CMA+DD equaliser.
Keywords :
FIR filters; blind equalisers; convergence; maximum likelihood estimation; probability; quadrature amplitude modulation; telecommunication signalling; CMA+DD; blind FIR equalisation; bootstrap MAP equaliser; computational complexity; concurrent CMA; constant modulus algorithm; convergence rate; decision directed equaliser; finite impulse response; high-order QAM signalling; maximum a posteriori probability; quadrature amplitude modulation; Blind equalizers; Computer science; Convergence; Costs; Finite impulse response filter; Mean square error methods; Quadrature amplitude modulation; Steady-state; Switches; White noise;
Conference_Titel :
Signal Processing, 2002 6th International Conference on
Print_ISBN :
0-7803-7488-6
DOI :
10.1109/ICOSP.2002.1180030
