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

Hard decision directed frequency tracking for OFDM on frequency selective channel

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.

The purchase and pricing options are temporarily unavailable. Please try again later.
4 Author(s)
Lu, Guanping ; Tsinghua National Laboratory for Information Science and Technology (TNList), Department of Electronic Engineering, Tsinghua University, Beijing 100084, China ; Wang, Jun ; Zhang, Chao ; Wang, Zhaocheng

This paper presents a decision directed frequency tracking scheme to improve the spectrum efficiency of Orthogonal Frequency Division Modulation (OFDM) transmission for frequency selective channels. OFDM divides a broadband channel into parallel narrowband subchannels with different channel characteristics. The subcarriers with lower attenuation are selected to do the decision directed based frequency tracking. A phase error detection method is needed to keep the hard decision working stable during tracking. The algorithm ensures that the carrier frequency offset could be solved from the detected phase error. The Mean Square Error (MSE) estimate and the loop bandwidth are also presented. Simulations illustrate that this scheme has better MSE and bit error rate performance than the traditional scheme. Furthermore, the pilots are saved in this scheme, which lead to improved spectrum efficiency.

Published in:

Tsinghua Science and Technology  (Volume:17 ,  Issue: 2 )

Date of Publication:

April 2012

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.