Title :
Outage performance of high-level QAM radio systems equipped with fractionally-spaced equalizers
Author :
Niger, Ph ; Vandamme, P.
Author_Institution :
CNET, Lannion, France
fDate :
28 Nov-1 Dec 1988
Abstract :
The authors present a comparative study of synchronous and fractionally spaced equalization techniques in a multipath fading environment. The outage performance of 64-QAM (quadrature amplitude modulation) and 256-QAM 140-Mb/s digital radio systems equipped with linear and decision-feedback equalizers is evaluated. Results are given in terms of net fade margin improvement versus flat fade margin. They show that the 2- to 3-dB gain obtained for linear equalizers vanishes with nonlinear equalizers
Keywords :
amplitude modulation; digital communication systems; equalisers; fading; feedback; radio systems; radiowave propagation; 140 Mbit/s; 256-QAM; 64-QAM; decision-feedback equalizers; digital radio systems; flat fade margin; fractionally spaced equalization; fractionally-spaced equalizers; linear equalizers; multipath fading; net fade margin improvement; nonlinear equalizers; outage performance; quadrature amplitude modulation; synchronous equalization; Additive white noise; Analytical models; Bit error rate; Decision feedback equalizers; Digital communication; Fading; Intersymbol interference; Quadrature amplitude modulation; Timing; Transfer functions;
Conference_Titel :
Global Telecommunications Conference, 1988, and Exhibition. 'Communications for the Information Age.' Conference Record, GLOBECOM '88., IEEE
Conference_Location :
Hollywood, FL
DOI :
10.1109/GLOCOM.1988.25845
