Open AccessBlind carrier frequency offset estimation for interleaved orthogonal frequency division multiple access uplink with multi‐antenna receiver: algorithms and performance analysis
Author(s) -
Zhang Weile,
Yin Qinye
Publication year - 2014
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/iet-com.2013.0539
Subject(s) - carrier frequency offset , telecommunications link , estimator , algorithm , orthogonal frequency division multiple access , computer science , frequency offset , subspace topology , offset (computer science) , antenna (radio) , upper and lower bounds , mathematics , orthogonal frequency division multiplexing , electronic engineering , telecommunications , statistics , engineering , artificial intelligence , mathematical analysis , programming language
In this study, for interleaved orthogonal frequency division multiple access uplink with multi‐antenna receiver, we propose two generalised carrier frequency offset estimators which, respectively, exploit the subspace theory and maximum‐likelihood (ML) criterion. We find that, as long as the numbers of multipaths from two of the users are smaller than the number of antennas at the receiver, both the proposed estimators support fully loaded transmissions. We also derive the theoretical performance lower bound for the proposed ML estimator. The numerical results are then provided, which corroborate the proposed studies.