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Reseach Article

Channel Estimation Enhancement in OFDM System based on Time Domain interpolation

by Mahdi Abdul Hadi, Omar Almukhtar Tawfeeq
International Journal of Computer Applications
Foundation of Computer Science (FCS), NY, USA
Volume 97 - Number 11
Year of Publication: 2014
Authors: Mahdi Abdul Hadi, Omar Almukhtar Tawfeeq
10.5120/17050-7124

Mahdi Abdul Hadi, Omar Almukhtar Tawfeeq . Channel Estimation Enhancement in OFDM System based on Time Domain interpolation. International Journal of Computer Applications. 97, 11 ( July 2014), 8-12. DOI=10.5120/17050-7124

@article{ 10.5120/17050-7124,
author = { Mahdi Abdul Hadi, Omar Almukhtar Tawfeeq },
title = { Channel Estimation Enhancement in OFDM System based on Time Domain interpolation },
journal = { International Journal of Computer Applications },
issue_date = { July 2014 },
volume = { 97 },
number = { 11 },
month = { July },
year = { 2014 },
issn = { 0975-8887 },
pages = { 8-12 },
numpages = {9},
url = { https://ijcaonline.org/archives/volume97/number11/17050-7124/ },
doi = { 10.5120/17050-7124 },
publisher = {Foundation of Computer Science (FCS), NY, USA},
address = {New York, USA}
}
%0 Journal Article
%1 2024-02-06T22:23:50.065533+05:30
%A Mahdi Abdul Hadi
%A Omar Almukhtar Tawfeeq
%T Channel Estimation Enhancement in OFDM System based on Time Domain interpolation
%J International Journal of Computer Applications
%@ 0975-8887
%V 97
%N 11
%P 8-12
%D 2014
%I Foundation of Computer Science (FCS), NY, USA
Abstract

In practical OFDM systems the transmitter send the data out through a multipath fading channel. At the receiver, the received data distorted by the channel characteristic. So, in order to recover the transmitted data, the channel effect must be estimated. In this paper channel estimation based on comb type pilot arrangement has been investigated by implementing least Square (LS) and Minimum Mean Error Square (MMSE) channel estimator to estimate the channel at the pilot locations. While the channel interpolation was done using linear interpolation, and time domain interpolation techniques. Also DFT-based estimation technique proposed to improve the performance of LS and MMSE estimator even more. Both LS and MMSE estimator have been implemented with and without DFT-based estimation technique and compare their performance by measuring the bit error rate BER with BPSK as modulation scheme and the channel is assumed to be multi-path Rayleigh slow fading channel based on Clark's model.

References
  1. Abdelhakim Khlifi, Ridha Bouallegue, "Performance Analysis of LS and LMMSE Channel Estimation Techniques for LTE Downlink Systems," International Journal of Wireless & Mobile Networks (IJWMN) Vol. 3, No. 5, October 2011
  2. Jung-Chieh Chen, Chao-Kai Wen, Pangan Ting, "An Efficient Pilot Design Scheme for Sparse Channel Estimation in OFDM Systems," IEEE Communication Letters, VOL. 17, NO. 7, JULY 2013
  3. R. Negi and J. Cioffi, "Pilot tone selection for channel estimation in a mobile OFDM system," IEEE Transactions on Consumer Electronics, Vol. 44, No. 3, AUGUST 1998
  4. Lilong Liu, Xuelin Yang, Jun Li ; Meihua Bi, Hao He, Weisheng Hu, "Experimental evaluation of pilot arrangement for channel estimation in OFDM systems," IEEE Communications and Photonics Conference and Exhibition, 2011. ACP. Asia, Page(s): 1 – 6
  5. Coleri, S. , Ergen, M. , Puri, A. , and Bahai, A. , "Channel estimation techniques based on pilot arrangement in OFDM systems," IEEE Transactions on Broadcasting, Vol. 48, No. 3, SEPTEMBER 2002, 223–229.
  6. Chengshan Xiao, Zheng, Y. R. , Beaulieu, N. C. "Novel Sum-of-Sinusoids Simulation Models for Rayleigh and Rician Fading Channels," IEEE Transactions on Wireless Communications, VOL. 5, NO. 12, DECEMBER 2006.
  7. Yong Soo Cho, Jaekwon Kim, Won Young Yang, Chung G. Kang . (2010). MIMO-OFDM Wireless Communications with MATLAB. Asia: John Wiley & Sons Pte Ltd.
  8. Xu Yan , Lin Ying, "Research of OFDM systems channel estimation based on DFT improved algorithm," IEEE 4th International Conference on Computer Science & Education, 2009. ICCSE '09. Page(s) 250-253.
  9. Recommendation (1997) ITU-R M. 1225. Guidelines for Evaluation of Radio Transmission Technologies for IMT-2000.
Index Terms

Computer Science
Information Sciences

Keywords

OFDM MMSE Inter-Carrier-Interference (ICI) Channel estimation Rayleigh slow fading channel