A simple channel shortening equalizer for wireless TDD-OFDM systems

Author

Zhang, Ping ; Qin, Jiayin

Author_Institution

Dept. of Electron. & Commun. Eng., Sun Yat-Sen Univ., Guangzhou, China

fYear

2010

fDate

25-27 June 2010

Firstpage

83

Lastpage

86

Abstract

In a Orthogonal Frequency Division Multiplexing (OFDM) system, a channel shortening equalizer (CSE) combats multipath interferences by shortening the channel delay spread to the desired length. In this paper, a simple and efficient channel shortening pre-equalizer for a wireless OFDM system is proposed. The equalizer takes advantages of the characteristics of a wireless channel which can be represented as a finite impulse response (FIR) filter and is an all zero system. It eliminates the zeros of FIR to effectively reduce the length of channel impulse response. The proposed equalizer simplifies wireless OFDM transceivers. The simulation results show the validity of the proposed preequalizer.

Keywords

Delay; Discrete Fourier transforms; Equalizers; Finite impulse response filter; Frequency domain analysis; IIR filters; Interference; OFDM modulation; Sun; Wireless communication; OFDM; channel shortening; multipath channels; wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications, Networking and Information Security (WCNIS), 2010 IEEE International Conference on

Conference_Location

Beijing, China

Print_ISBN

978-1-4244-5850-9

Type

conf

DOI

10.1109/WCINS.2010.5541759

Filename

5541759