CFO estimation schemes for differential OFDM systems Academic Article

abstract

• This paper proposes two blind carrier frequency offset (CFO) estimation schemes for differentially modulated orthogonal frequency division multiplexing (OFDM) systems. The proposed schemes estimate the fractional part of the CFO with only two consecutive OFDM blocks, and they exploit two implicit properties associated with differentially modulated OFDM (DOFDM) systems, i.e., the channel keeps constant over two consecutive OFDM blocks, and the DOFDM systems employ an M-ary phase-shift keying constellation. One of the schemes is based on the finite alphabet (FA) constraint and the other one is based on the constant modulus (CM) constraint. They provide a trade-off between the performance and computational complexity. The constrained Cramer-Rao lower bound is also derived. Several numerical examples are presented to validate the efficacy of the proposed schemes. 2006 IEEE.

authors

• Ghrayeb, Ali

published proceedings

• IEEE Transactions on Wireless Communications

author list (cited authors)

• Zeng, X. N., & Ghrayeb, A.

citation count

• 6

complete list of authors

• Zeng, Xiang Nian||Ghrayeb, A

publication date

• January 2009

publisher

• Institute of Electrical and Electronics Engineers (IEEE)  Publisher

published in

• IEEE Transactions on Wireless Communications  Journal

Digital Object Identifier (DOI)

• 10.1109/t-wc.2009.080546

start page

• 124

end page

• 129

volume

• 8

issue

• 1

URL

• http://dx.doi.org/10.1109/t-wc.2009.080546