Performance evaluation of turbo coded OFDM with channel estimation over SUI channel models

Author

Ullah Khan, Latif ; Ali Mahmud, Sahibzada ; Khan, Gul Muhammad ; Zafar, M. Haseeb

Author_Institution

Dept. of Electr. Eng., Univ. of Eng. & Technol., Peshawar, Pakistan

fYear

2014

fDate

23-25 July 2014

Firstpage

479

Lastpage

484

Abstract

In this paper, the performance of the Least Squares (LS) estimator along with turbo codes in OFDM is evaluated for the SUI channel models in the presence of AWGN. Turbo codes are used in this paper because of its BER performance close to Shannon limit. The iterative turbo decoder exchanges soft information between the component decoders. Maximum A Posteriori (MAP) and its simplified version Max-Log-MAP algorithms are used for the component decoders. The performance and complexity comparison is also made between the decoding algorithms. Moreover the effect of memory order on the performance of the decoding algorithms is also studied.

Keywords

OFDM modulation; channel estimation; error statistics; iterative decoding; maximum likelihood decoding; turbo codes; AWGN; BER performance; SUI channel models; channel estimation; component decoders; iterative turbo decoder; least squares estimator; max-log-MAP algorithms; maximum a posteriori; performance evaluation; turbo coded OFDM; Bit error rate; Channel estimation; Channel models; Decoding; Interpolation; OFDM; Turbo codes; LS estimator; MAP algorithm; MAX-LogMAP algorithm; OFDM; SUI Channel Models;

fLanguage

English

Publisher

ieee

Conference_Titel

Communication Systems, Networks & Digital Signal Processing (CSNDSP), 2014 9th International Symposium on

Conference_Location

Manchester

Type

conf

DOI

10.1109/CSNDSP.2014.6923877

Filename

6923877