CRB for Carrier Frequency Offset Estimation with Pilot and Virtual Subcarriers

Author

Bai, Lin ; Yin, Qinye

Author_Institution

MOE Key Lab. for Intell. Networks & Network Security, Xi´´an Jiaotong Univ., Xi´´an, China

Volume

16

Issue

4

fYear

2012

fDate

4/1/2012 12:00:00 AM

Firstpage

522

Lastpage

525

Abstract

The Cramer Rao bound (CRB) for the carrier frequency offset (CFO) estimation with OFDM blocks consisting of virtual, pilot and data subcarriers is derived in this paper. From the CRB derived in the general case that all the three kinds of subcarriers exist, the CRB for the special cases that one or two kinds of the subcarriers are absent can be easily deduced. Further more, the derived CRB is a tight lower bound as well designed estimators, e.g. the maximum likelihood (ML) estimator, can achieve it at high signal to noise ratio (SNR). Thus, the derived CRB is a good benchmark for evaluating many different CFO estimators.

Keywords

OFDM modulation; maximum likelihood estimation; Cramer Rao bound; OFDM block; carrier frequency offset estimation; data subcarrier; maximum likelihood estimator; pilot subcarrier; signal to noise ratio; virtual subcarrier; Frequency estimation; Manganese; Maximum likelihood estimation; OFDM; Signal to noise ratio; Vectors; Cramer Rao bound; carrier frequency offset estimation; data subcarriers; pilot subcarriers; virtual subcarriers;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2012.022112.112598

Filename

6156508