Cart (Loading....) | Create Account
Close category search window

A carrier and timing recovery technique for QAM transmission on digital subscriber loops

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Daneshrad, B. ; Electr. Eng. Dept., California Univ., Los Angeles, CA, USA ; Samueli, H.

The asymmetric digital subscriber line (ADSL) service attempts to provide 1.6 Mb/s data transmission over a single twisted-pair copper loop for distances up to 18 kft. A simple timing and carrier recovery scheme for a quadrature amplitude modulation (QAM) approach is proposed. The algorithm uses the receiver decisions to eliminate the effects of intersymbol interference (ISI) as well as to provide estimates for samples of the pulse response at the demodulator output. These estimates are then used to generate a sampling phase error signal that can be used in a single phase locked loop configuration to correct carrier frequency, as well as timing offsets in the QAM based system. The algorithm exploits the characteristics of both the system as well as the environment, and is simple enough to allow integration with all other receiver blocks on a single integrated circuit. Preliminary results for an ADSL system with blind equalization starting from an unequalized state are presented. The new scheme is shown to be effective at acquiring and tracking frequency offsets as high as 112 ppm, without significantly degrading system performance

Published in:

Communications, 1993. ICC '93 Geneva. Technical Program, Conference Record, IEEE International Conference on  (Volume:3 )

Date of Conference:

23-26 May 1993

Need Help?

IEEE Advancing Technology for Humanity About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies

A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2014 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.