Title :
Adaptive equalisation of discrete channels via fast convolution techniques
Author :
Corsini, P. ; Picchi, G. ; Prati, G.
Author_Institution :
Universit¿¿ di Pisa, Istituto di Elettronica e Telecomunicazioni, Pisa, Italy
fDate :
11/1/1981 12:00:00 AM
Abstract :
A discrete adaptive equaliser for synchronous data transmission is presented, based on fast convolution techniques and efficient Fourier transform computation algorithms. Mean-square error minimisation is automatically performed in the discrete frequency domain by using Rosen´s gradient projection method. Algorithms are developed to enable the equaliser control to estimate both mean-square error gradient and correction step size and modify the filter tap weights directly in the discrete frequency domain. This discrete frequency-domain equaliser is compared with the conventional time-domain equaliser as regards ease of implementation and speed of convergence.
Keywords :
Fourier transforms; Fourier transform; discrete adaptive equaliser; discrete channels; fast convolution techniques; gradient projection method; mean square error method;
Journal_Title :
Computers and Digital Techniques, IEE Proceedings E
DOI :
10.1049/ip-e.1981.0047