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864 IEEE TRANSACTIONS ON COMMUNICATIONS, VOL. 55, NO. 5, MAY 2007 Transactions Papers
 

Summary: 864 IEEE TRANSACTIONS ON COMMUNICATIONS, VOL. 55, NO. 5, MAY 2007
Transactions Papers
Pilot Designs for Consistent Frequency-Offset
Estimation in OFDM Systems
Yinghui Li, Student Member, IEEE, Hlaing Minn, Member, IEEE, Naofal Al-Dhahir, Senior Member, IEEE, and
A. Robert Calderbank, Fellow, IEEE
Abstract--This paper presents pilot designs for consistent
frequency-offset estimation of orthogonal frequency-division
multiplexing systems in frequency-selective fading channels. We
describe two design approaches, namely, consistency in the prob-
abilistic sense and absolute consistency. Existing preambles and
pilot designs in the literature do not guarantee the absolute con-
sistency. We derive general criteria for both approaches, present
sufficient conditions on the pilot structures over the maximum car-
rier frequency offset (CFO) estimation range (half of the sampling
rate), and derive simple pilot designs satisfying these conditions.
We also extend the sufficient conditions to any arbitrary but fixed
CFO estimation range, and present some generalized design pat-
terns. Furthermore, the CFO estimation performances of distinct
consistent pilot designs can be quite different at moderate or low

  

Source: Al-Dhahir, Naofal - Department of Electrical Engineering, University of Texas at Dallas
Minn, Hlaing - Department of Electrical Engineering, University of Texas at Dallas

 

Collections: Engineering