Hybrid Domain Compensation for Analog Impairments in OFDM Systems

Author

Lin, Hai ; Zhu, Xu ; Yamashita, Katsumi

Author_Institution

Dept. of Electr. & Inf. Syst., Osaka Prefecture Univ., Sakai

fYear

2008

Firstpage

1

Lastpage

5

Abstract

In orthogonal frequency division multiplexing (OFDM) systems with direct-conversion transceivers, transmission performance is severely degraded by analog impairments, typically, carrier frequency offset, transmitter/receiver I/Q imbalance, and DC offset. The existing research considered only part of these impairments. In this paper, we analyze the OFDM signal corrupted by all these impairments. Then, a hybrid domain compensation scheme consisting of the time-domain and frequency-domain compensation is proposed. For the purpose of practical implementation, we also propose a comparable preamble, with which the compensation coefficients can be obtained by a low- complexity acquisition algorithm.

Keywords

OFDM modulation; frequency-domain analysis; transceivers; DC offset; I/Q imbalance; analog impairments; carrier frequency offset; direct-conversion transceivers; frequency-domain compensation; hybrid domain compensation scheme; low-complexity acquisition algorithm; orthogonal frequency division multiplexing systems; time-domain compensation; Bandwidth; Degradation; Discrete cosine transforms; Frequency estimation; Maximum likelihood estimation; OFDM; Signal analysis; Time domain analysis; Transceivers; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 2008. IEEE GLOBECOM 2008. IEEE

Conference_Location

New Orleans, LO

ISSN

1930-529X

Print_ISBN

978-1-4244-2324-8

Type

conf

DOI

10.1109/GLOCOM.2008.ECP.615

Filename

4698390