Preamble and Pilot Symbol Design for Channel Estimation in OFDM

Author

Shuichi Ohno

Author_Institution

Dept. of Artificial Complex Syst. Eng., Hiroshima Univ., Japan

Volume

3

fYear

2007

fDate

15-20 April 2007

Abstract

The presence of null subcarriers in orthogonal frequency division multiplexing system complicates the design of both training preamble for channel estimation and pilot symbols for pilot-aided channel estimation that minimize the mean square error (MSE) of estimates of frequency-selective channels. In this paper, we numerically find optimal preambles, casting the MSE minimization problem into a semidefinite programming problem. Then, based on the optimal preamble, we also design pilot symbols for pilot-aided channel estimation. A design example under the same setting as IEEE 802.11a is provided to verify the efficacy of our proposal.

Keywords

OFDM modulation; channel estimation; mathematical programming; mean square error methods; MSE; OFDM; frequency-selective channels; mean square error; orthogonal frequency division multiplexing system; pilot symbol design; pilot-aided channel estimation; semidefinite programming problem; Bit error rate; Channel capacity; Channel estimation; Design engineering; Electronic mail; Frequency estimation; Intersymbol interference; Machine vision; OFDM; Systems engineering and theory; Multipath channels; Parameter estimation;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech and Signal Processing, 2007. ICASSP 2007. IEEE International Conference on

Conference_Location

Honolulu, HI

ISSN

1520-6149

Print_ISBN

1-4244-0727-3

Type

conf

DOI

10.1109/ICASSP.2007.366527

Filename

4217701