A new approach for channel equalization without guard interval using polyphase matrices

Author

Klier, Juliane ; Schuller, Gerald ; Haardt, Martin ; Hennhofer, Marko

Author_Institution

Fraunhofer-Inst. for Digital Media Technol., Ilmenau

Volume

2

fYear

2005

fDate

11-14 Sept. 2005

Firstpage

1194

Abstract

In this contribution we propose a new way to state and solve the channel equalization problem for an OFDM (orthogonal frequency division multiplexing) system, without the use of a guard interval. Therefore, the spectral efficiency is increased. The approach is based on the channel representation as a polynomial matrix. We develop a new decomposition of this matrix, which diagonalizes the channel matrix independently of the channel realization. It leads to a simple inversion of the channel matrix. The decomposition consists of forward and inverse DFTs and polynomial diagonal matrices. Further on, there is no restriction on the length of the channel impulse response

Keywords

OFDM modulation; discrete Fourier transforms; equalisers; matrix decomposition; transient response; wireless channels; DFT; OFDM system; channel equalization problem; channel impulse response; channel representation; discrete Fourier transform; inversion method; matrix decomposition; orthogonal frequency division multiplexing; polynomial matrix; spectral efficiency; Communications technology; Convolution; Delay; Equations; Frequency modulation; Intersymbol interference; Matrix decomposition; OFDM modulation; Polynomials; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Personal, Indoor and Mobile Radio Communications, 2005. PIMRC 2005. IEEE 16th International Symposium on

Conference_Location

Berlin

Print_ISBN

9.7838007291e+012

Type

conf

DOI

10.1109/PIMRC.2005.1651630

Filename

1651630