A simple adaptive channel estimation scheme for OFDM systems

Author

Onizawa, Takeshi ; Mizoguchi, Masato ; Sakata, Tetsu ; Morikura, Masahiro

Author_Institution

NTT Access Network Service Syst. Labs., Kanagawa, Japan

Volume

1

fYear

1999

fDate

1999

Firstpage

279

Abstract

This paper proposes a simple adaptive channel estimation scheme for orthogonal frequency division multiplexing (OFDM) in order to realize high-rate wireless local area networks (LANs). The proposed estimator consists of simple frequency-domain FIR filters, which are adaptively selected according to the difference vector between adjacent subcarriers and channel amplitude of the subcarrier. Computer simulations show that the proposed scheme offers superior packet error rate (PER) performance to the least-squares scheme, by 1.1 dB in terms of required E_b/N₀ at a PER=0.1 in AWGN channels. They also show, for the same criterion, a 0.7 dB improvement for a frequency selective fading channel with a delay spread value of 100 ns

Keywords

AWGN channels; FIR filters; OFDM modulation; adaptive estimation; adaptive filters; error statistics; fading channels; packet radio networks; telecommunication channels; wireless LAN; AWGN channel; AWGN channels; OFDM systems; adaptive channel estimation; adaptive filter; adjacent subcarriers; channel amplitude; computer simulations; delay spread; difference vector; frequency selective fading channel; frequency-domain FIR filters; high-rate wireless local area networks; least-squares; orthogonal frequency division multiplexing; packet error rate performance; wireless LAN; AWGN channels; Amplitude estimation; Channel estimation; Computer simulation; Error analysis; Fading; Finite impulse response filter; Frequency estimation; OFDM; Wireless LAN;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1999. VTC 1999 - Fall. IEEE VTS 50th

Conference_Location

Amsterdam

ISSN

1090-3038

Print_ISBN

0-7803-5435-4

Type

conf

DOI

10.1109/VETECF.1999.797140

Filename

797140