(Reduced number of pilot in comb-type pilot arrangement by using modified least square channel estimation for OFDM system)

Author

Mahdi, A.S. ; Ercelebi, E.

Author_Institution

Bilgi ve Iletisim Muhendisligi Bolumu, Baghdad Univ., Baghdad, Iraq

fYear

2013

fDate

24-26 April 2013

Firstpage

1

Lastpage

4

Abstract

A modified least square algorithm (MLS) for wireless channel estimation at comb-type pilot arrangement in QAM signals for OFDM system is presented. The proposed algorithm aims to reduce number of pilot tones in each OFDM symbol because insert more pilot symbols lead to bandwidth expansion or data rate reduction [1-2]. The simulation results for MLS algorithm showed a good performance in noisy wireless channel and the performances of the presented technique and LS have been compared with different SNR as well as measuring bit error rate verses signal to noise ratio with 4-QAM as a modulation schemes.

Keywords

OFDM modulation; channel estimation; error statistics; least mean squares methods; quadrature amplitude modulation; wireless channels; MLS; OFDM system; QAM signal; bandwidth expansion; bit error rate; comb-type pilot arrangement; data rate reduction; least square algorithm; modulation scheme; noisy wireless channel; signal-to-noise ratio; wireless channel estimation; Channel estimation; Discrete Fourier transforms; Least squares approximations; OFDM; Quadrature amplitude modulation; Signal to noise ratio; Wireless communication; LS algorithm; MLS algorithm; OFDM; channel estimation;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing and Communications Applications Conference (SIU), 2013 21st

Conference_Location

Haspolat

Print_ISBN

978-1-4673-5562-9

Electronic_ISBN

978-1-4673-5561-2

Type

conf

DOI

10.1109/SIU.2013.6531233

Filename

6531233