Joint Estimation of IQ Parameters and Channel Response for OFDM Systems

Author

Marey, M. ; Samir, M. ; Dobre, O. ; El-Shenawy, H. ; El-Henawy, A.

Author_Institution

Fac. of Eng. & Appl. Sci., Memorial Univ. of Newfoundland, St. John´´s, NL, Canada

fYear

2010

fDate

6-9 Sept. 2010

Firstpage

1

Lastpage

5

Abstract

In this paper, we develop a new algorithm to jointly estimate the channel impulse response and inphase-quadrature (IQ) imbalances for OFDM systems. The estimation algorithm is based on the expectation maximization(EM) algorithm, exploiting information from the pilot symbols and detected data symbols in a systematic fashion. To reduce the complexity of the estimation algorithm, a suboptimal scheme is also introduced. The results indicate that the proposed algorithms achieve a significant improvement in the bit error rate (BER) performance when compared with conventional data-aided algorithms.

Keywords

OFDM modulation; error statistics; multiplexing; parameter estimation; IQ parameters estimation; OFDM systems; bit error rate; channel impulse response; channel response estimation; data symbols; data-aided algorithms; estimation algorithm; expectation maximization algorithm; inphase-quadrature imbalances; Bit error rate; Detectors; Maximum likelihood estimation; OFDM; Receivers; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference Fall (VTC 2010-Fall), 2010 IEEE 72nd

Conference_Location

Ottawa, ON

ISSN

1090-3038

Print_ISBN

978-1-4244-3573-9

Electronic_ISBN

1090-3038

Type

conf

DOI

10.1109/VETECF.2010.5594192

Filename

5594192