Low complexity time-domain channel and delay spread estimation for OFDM systems

Author

Zhu, Mo ; Awoseyila, Adegbenga B. ; Evans, Barry G.

Author_Institution

Centre for Commun. Syst. Res., Univ. of Surrey, Guildford, UK

Volume

56

Issue

4

fYear

2010

fDate

11/1/2010 12:00:00 AM

Firstpage

2170

Lastpage

2177

Abstract

A low complexity time-domain channel estimation scheme for OFDM systems is presented. It uses a training symbol (preamble) to estimate the channel impulse response (CIR) in the presence of timing synchronization errors. Its computational complexity is much lower than that of the popular MMSE technique and this can be further reduced if there is prior knowledge of the channel delay spread. Consequently, channel delay spread estimation is also addressed by using threshold setting on the optimized CIR. Computer simulations show that the proposed scheme achieves near-ideal accuracy in quasi-static channels.

Keywords

OFDM modulation; channel estimation; computational complexity; delay estimation; least mean squares methods; synchronisation; time-domain analysis; transient response; MMSE technique; OFDM systems; channel delay spread estimation; channel impulse response estimation; computational complexity; computer simulations; low complexity time-domain channel estimation scheme; optimized CIR; quasistatic channels; timing synchronization errors; training symbol; Channel estimation; Complexity theory; Delay; Estimation; OFDM; Synchronization; OFDM, channel estimation, timing synchronization, delay spread estimation.;

fLanguage

English

Journal_Title

Consumer Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0098-3063

Type

jour

DOI

10.1109/TCE.2010.5681087

Filename

5681087