By Topic

Performance of MUSIC based multi-user CFO estimation for interleaved OFDMA uplink

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

1 Author(s)
Radovic, D.S. ; Elsys Eastern Eur., Serbia and Montenegro, Yugoslavia

To synchronize multi-user orthogonal frequency division multiplex access (OFDMA) uplink system carrier frequency offset (CFO) of each user has to be estimated. In this paper we analyze the performance of structure based CFO estimation algorithm for multi-user interleaved OFDMA uplink recently proposed in the literature. It is shown that CFO estimation error is insensitive to the user's channel type because signal structure is conserved due to the maximal frequency diversity of interleaved scheme. Some performance loss occurs in the case of inter symbol interference. It is also shown that algorithm is very robust to the near-far effect (20 dB) when there are no timing errors. Underestimation of number of CFOs (users) is possible when SNR is low. We examine a modification of the original algorithm which lowers underestimation probability with the same amount of computations.

Published in:

Radio and Wireless Symposium, 2006 IEEE

Date of Conference:

17-19 Jan. 2006