Adjustable Comb-Type Pilot Arrangement in Wireless OFDM

Author

Hu, Chia-Chang ; Chen, Fu-How

Author_Institution

Dept. of Commun. Eng., Nat. Chung Cheng Univ., Chiayi

fYear

2008

fDate

21-24 Sept. 2008

Firstpage

1

Lastpage

4

Abstract

An adaptive pilot-symbol assignment scheme is proposed for interpolation-based channel estimation in wireless orthogonal frequency division multiplexing (OFDM) communication systems. The channel transfer functions of data tones are interpolated by the piecewise-linear and the second-order polynomial methods due to their inherent simplicity. Simulations are conducted to demonstrate both system performance and bandwidth (BW) superiority and to provide a comparative evaluation of the proposed scheme with conventional fixed pilot-symbol channel estimation schemes.

Keywords

OFDM modulation; channel estimation; interpolation; polynomial approximation; radio networks; transfer functions; adaptive pilot-symbol assignment scheme; adjustable comb-type pilot arrangement; bandwidth superiority; channel transfer functions; fixed pilot-symbol channel estimation schemes; interpolation-based channel estimation; orthogonal frequency division multiplexing; piecewise-linear methods; second-order polynomial methods; wireless OFDM; Bandwidth; Bit error rate; Channel estimation; Digital video broadcasting; Fading; Interpolation; Maximum likelihood estimation; OFDM; Polynomials; Transfer functions;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2008. VTC 2008-Fall. IEEE 68th

Conference_Location

Calgary, BC

ISSN

1090-3038

Print_ISBN

978-1-4244-1721-6

Electronic_ISBN

1090-3038

Type

conf

DOI

10.1109/VETECF.2008.231

Filename

4657063