Inverse Methods for Reconstruction of Channel Taps in OFDM Systems

Author

Hrycak, Tomasz ; Das, Saptarshi ; Matz, Gerald

Author_Institution

Fac. of Math., Univ. of Vienna, Vienna, Austria

Volume

60

Issue

5

fYear

2012

fDate

5/1/2012 12:00:00 AM

Firstpage

2666

Lastpage

2671

Abstract

We describe a novel pilot-aided method for estimation of doubly selective wireless channels in OFDM systems. We compute the first few Fourier coefficients of each channel tap from the pilot information. We then estimate the BEM coefficients of the channel taps from their respective Fourier coefficients using a recently developed inverse reconstruction method. For a system with L channel taps, the proposed method uses O(L log L) operations and O(L) memory per OFDM symbol. We validate our method by simulating a system conforming to the IEEE 802.16e standard.

Keywords

Fourier transforms; OFDM modulation; WiMax; channel estimation; communication complexity; wireless channels; BEM coefficient estimation; Fourier coefficient; IEEE 802.16e standard; L channel taps reconstruction; OFDM system; doubly selective wireless channel estimation; inverse reconstruction method; memory per OFDM symbol; pilot information; pilot-aided method; Bandwidth; Channel estimation; Estimation; OFDM; Polynomials; Reconstruction algorithms; Basis Expansion Model (BEM); OFDM; channel estimation; doubly selective; inverse reconstruction method;

fLanguage

English

Journal_Title

Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1053-587X

Type

jour

DOI

10.1109/TSP.2012.2187522

Filename

6151184