Title :
On the use of orthogonal transforms for fractionally-spaced blind equalisation
Author :
Sirisuk, Phaophak ; Constantinides, Anthony G.
Author_Institution :
Mahanakorn Univ. of Technol., Bangkok, Thailand
Abstract :
The constant modulus algorithm (CMA) implemented through fractionally-spaced equalisation (FSE) can achieve perfect equalisation in the absence of additive noise. However, when some zeros of the subchannel are close, then it is known that slow convergence is observed. We investigate in this context the use of orthogonal transforms in FSE using CMA. To improve the convergence rate. Simulations are presented to demonstrate the performance of the proposed techniques.
Keywords :
Hadamard transforms; adaptive equalisers; adaptive filters; blind equalisers; convergence of numerical methods; discrete cosine transforms; noise; phase shift keying; BPSK; Walsh-Hadamard transform; additive noise; constant modulus algorithm; convergence rate; discrete cosine transform; fractionally spaced transform domain adaptive filter; fractionally-spaced blind equalisation; orthogonal transforms; perfect equalisation; performance; simulations; slow convergence; subchannel zeros; update equations; Adaptive equalizers; Adaptive filters; Additive noise; Blind equalizers; Convergence; Discrete cosine transforms; Discrete transforms; Educational institutions; Equations; Least squares approximation;
Conference_Titel :
Signals, Systems, and Computers, 1999. Conference Record of the Thirty-Third Asilomar Conference on
Conference_Location :
Pacific Grove, CA, USA
Print_ISBN :
0-7803-5700-0
DOI :
10.1109/ACSSC.1999.832337
