Deterministic OFDM Channel Estimator Based on Nonmaximally Decimated Filterbanks

Author

Wu, Meiwu ; Fang, Yong ; Wang, Min

Author_Institution

Sch. of Commun. & Inf. Eng., Shanghai Univ.

fYear

2006

fDate

22-24 Sept. 2006

Firstpage

1

Lastpage

4

Abstract

Channel estimation is indispensable when a coherent demodulation is adopted to achieve the 3 dB SNR gain in OFDM transmission systems. In this paper, a novel frequency domain OFDM channel estimator based on the nonmaximally decimated filterbanks and the corresponding pilot design optimization method is developed. Compared with the conventional LS and DFT-based MMSE methods, the proposed scheme does not require any channel statistics and is able to achieve a lower error floor in the frac14 maximum delay spread conditions as well as more suitable for the propagation environments with up to frac12 maximum delay spread. Numerical simulation results its effectiveness for practical applications

Keywords

OFDM modulation; channel bank filters; channel estimation; delays; demodulation; matrix algebra; mobile radio; wireless channels; 3 dB; DFT-based MMSE methods; LS methods; OFDM transmission systems; SNR gain; coherent demodulation; delay spread; frequency domain OFDM channel estimator; mobile wireless channels; nonmaximally decimated filterbanks; Channel estimation; Demodulation; Design optimization; Error analysis; Frequency domain analysis; Frequency estimation; Gain; Numerical simulation; OFDM; Propagation delay;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications, Networking and Mobile Computing, 2006. WiCOM 2006.International Conference on

Conference_Location

Wuhan

Print_ISBN

1-4244-0517-3

Type

conf

DOI

10.1109/WiCOM.2006.66

Filename

4149243