Maximum likelihood based estimation of frequency and phase offset in DCT OFDM systems under non-circular transmissions: algorithms, analysis and comparisons

Author

Gao, Feifei ; Cui, Tao ; Nallanathan, A. ; Tellambura, C.

Author_Institution

Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore

Volume

56

Issue

9

fYear

2008

fDate

9/1/2008 12:00:00 AM

Firstpage

1425

Lastpage

1429

Abstract

Recently, the advantages of the discrete cosine transform (DCT) based orthogonal frequency-division multiplexing (OFDM) have come to the light. We thus consider DCT- OFDM with non-circular transmission (our results cover circular transmission as well) and present two blind joint maximum- likelihood frequency offset and phase offset estimators. Both our theoretical analysis and numerical comparisons reveal new advantages of DCT-OFDM over the traditional discrete Fourier transform (DFT) based OFDM. These advantages, as well as those already uncovered in the early works on DCT-OFDM, support the belief that DCT-OFDM is a promising multi-carrier modulation scheme.

Keywords

OFDM modulation; discrete Fourier transforms; discrete cosine transforms; frequency estimation; maximum likelihood estimation; phase estimation; DCT; OFDM systems; discrete Fourier transform; discrete cosine transform; frequency offset estimators; maximum likelihood based estimation; multicarrier modulation scheme; noncircular transmissions; orthogonal frequency-division multiplexing; phase offset estimators; AWGN; Algorithm design and analysis; Bit error rate; Discrete Fourier transforms; Discrete cosine transforms; Frequency division multiplexing; Frequency estimation; Maximum likelihood estimation; OFDM modulation; Phase estimation; DCT-OFDM; Non-circular; carrier frequency offset; maximum likelihood; phase offset;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/TCOMM.2008.060411

Filename

4623796