Title :
A new adaptive equalizer for carrierless amplitude and phase (CAP) receivers
Author :
Gao, J. ; Leung, Y.H.
Author_Institution :
ATRI, Curtin Univ. of Technol., Bentley, WA, Australia
Abstract :
In carrierless amplitude and phase (CAP) modulation systems, receivers with adaptive linear equalizers generally use an equalizer structure consisting of two parallel arms of fractionally-spaced, tapped-delay-line filters for channel equalization. In this paper, we proposed a new adaptive equalizer based on the existing structure. For infinite number of taps, both equalizers with optimum weights provide the same level of mean-square error (MSE) performance. In comparison with the existing equalizer using the standard least mean square (LMS) algorithm, the new equalizer with a modified LMS algorithm has less than half the misadjustment for the same convergence rate. Alternatively, for the same misadjustment, the weights of the new adaptive equalizer converge faster than the existing equalizer
Keywords :
FIR filters; adaptive equalisers; delay lines; matched filters; mean square error methods; CAP receivers; adaptive linear equalizers; carrierless amplitude and phase receivers; channel equalization; convergence rate; equalizer structure; mean-square error; tapped-delay-line filters; Adaptive equalizers; Adaptive filters; Arm; Digital filters; Finite impulse response filter; Frequency; Least squares approximation; Matched filters; Sampling methods; Transmitters;
Conference_Titel :
Circuits and Systems, 1999. ISCAS '99. Proceedings of the 1999 IEEE International Symposium on
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-5471-0
DOI :
10.1109/ISCAS.1999.778792
