Title :
A low-complexity equalization technique for OFDM system in time-variant multipath channels
Author :
Li, Guangjie ; Yang, Hongwei ; Cai, Liyu ; Gui, Luoning
Author_Institution :
Res. & Innovation, Alcatel Shanghai Bell Co., Ltd., China
Abstract :
In this paper, an equalization technique with low computational complexity is proposed for time-variant multipath channel in OFDM system. Under the assumption that channel impulse response (CIR) varies linearly within one OFDM symbol, this technique utilizes the property of Toeplitz matrix and fast Fourier transform (FFT) matrix to obtain the interchannel interference (ICI) terms in frequency domain with very low complexity, and Jacobi stationary iterative algorithm is proposed to compensate these ICI terms in manner of matrix.
Keywords :
Jacobian matrices; OFDM modulation; Toeplitz matrices; adjacent channel interference; equalisers; fading channels; fast Fourier transforms; frequency-domain analysis; iterative methods; multipath channels; time-varying channels; transient response; CIR; FFT matrix; ICI; Jacobi stationary iterative algorithm; OFDM system; Toeplitz matrix; channel impulse response; equalization technique; fast Fourier transform; frequency domain; interchannel interference; orthogonal frequency division multiplexing; time-variant multipath channel; Computational complexity; Equalizers; Fading; Fast Fourier transforms; Frequency domain analysis; Interchannel interference; Iterative algorithms; Jacobian matrices; Multipath channels; OFDM;
Conference_Titel :
Vehicular Technology Conference, 2003. VTC 2003-Fall. 2003 IEEE 58th
Print_ISBN :
0-7803-7954-3
DOI :
10.1109/VETECF.2003.1285977
