Title :
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
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;
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
DOI :
10.1109/WCINS.2010.5541759
