An equalization technique for orthogonal frequency-division multiplexing systems in time-variant multipath channels

Author

Jeon, Won Gi ; Chang, Kyung Hi ; Cho, Yong Soo

Author_Institution

Dept. of Electr. Eng., Chungang Univ., Seoul, South Korea

Volume

47

Issue

1

fYear

1999

fDate

1/1/1999 12:00:00 AM

Firstpage

27

Lastpage

32

Abstract

A loss of subchannel orthogonality due to time-variant multipath channels in orthogonal frequency division multiplexing (OFDM) systems leads to interchannel interference (ICI) which increases the error floor in proportion to the Doppler frequency. A simple frequency-domain equalization technique which can compensate for the effect of ICI in a multipath fading channel is proposed. In this technique, the equalization of the received OFDM signal is achieved by using the assumption that the channel impulse response (CIR) varies in a linear fashion during a block period and by compensating for the ICI terms that significantly affect the bit-error rate (BER) performance

Keywords

OFDM modulation; adjacent channel interference; equalisers; error statistics; fading channels; frequency-domain analysis; multipath channels; time-varying channels; transient response; BER performance; Doppler frequency; ICI; OFDM systems; bit-error rate; channel impulse response; error floor; frequency-domain equalization; interchannel interference; multipath fading channel; orthogonal frequency-division multiplexing; received OFDM signal; subchannel orthogonality; time-variant multipath channels; AWGN; Acoustic distortion; Bit error rate; Digital video broadcasting; Equalizers; Fading; Frequency division multiplexing; Interchannel interference; Multipath channels; OFDM;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/26.747810

Filename

747810