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Performance comparison of Different Pilot Aided Channel Estimation Techniques for OFDM IEEE 802.11e (Mobile Wimax) Systems

by Rajeshwar Singh, Gurpreet Singh Saini
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International Journal of Computer Applications
Foundation of Computer Science (FCS), NY, USA
Volume 68 - Number 17
Year of Publication: 2013
Authors: Rajeshwar Singh, Gurpreet Singh Saini
10.5120/11675-7307

Rajeshwar Singh, Gurpreet Singh Saini . Performance comparison of Different Pilot Aided Channel Estimation Techniques for OFDM IEEE 802.11e (Mobile Wimax) Systems. International Journal of Computer Applications. 68, 17 ( April 2013), 42-49. DOI=10.5120/11675-7307

@article{ 10.5120/11675-7307,
author = { Rajeshwar Singh, Gurpreet Singh Saini },
title = { Performance comparison of Different Pilot Aided Channel Estimation Techniques for OFDM IEEE 802.11e (Mobile Wimax) Systems },
journal = { International Journal of Computer Applications },
issue_date = { April 2013 },
volume = { 68 },
number = { 17 },
month = { April },
year = { 2013 },
issn = { 0975-8887 },
pages = { 42-49 },
numpages = {9},
url = { https://ijcaonline.org/archives/volume68/number17/11675-7307/ },
doi = { 10.5120/11675-7307 },
publisher = {Foundation of Computer Science (FCS), NY, USA},
address = {New York, USA}
}
%0 Journal Article
%1 2024-02-06T21:28:09.945456+05:30
%A Rajeshwar Singh
%A Gurpreet Singh Saini
%T Performance comparison of Different Pilot Aided Channel Estimation Techniques for OFDM IEEE 802.11e (Mobile Wimax) Systems
%J International Journal of Computer Applications
%@ 0975-8887
%V 68
%N 17
%P 42-49
%D 2013
%I Foundation of Computer Science (FCS), NY, USA
Abstract

Orthogonal frequency-division multiplexing (OFDM) modulation is a promising technique for achieving the high bit rates required for a wireless multimedia service. In this paper we present differentchannel estimation algorithms for OFDM mobile communication systems based on the use of pilot subcarriers. Specifically we present LS (Least Square),MMSE(Minimum Mean Square Error) and LMS iterative channel estimation techniques to show the performance comparison of channel estimation techniques supported by n IFFT-based time channel estimation. The channel estimation is based on the principle of pilot-symbol aided channel estimation (PACE), and it has been implemented using block-type pilot subcarrier arrangements. The low complexity of LMS algorithm, has a higher efficiency than conventional methods(without channel estimation,LS& LMMSE ) and it can work in lower amount of SNRs. We have compared the performances of all schemes by measuring bit error rate with 16QAM as modulation scheme, and multi-path Rayleigh fading channel as channel model. Simulation results validate that the LMS Iterative channel estimation scheme can achieve tremendous performance as the existing channel estimation methods.

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Index Terms

Computer Science
Information Sciences

Keywords

Channel estimation(CE) OFDM(Orthogonal Frequency Division Multiplexing) QAM(Qadrature Amplitude Modulation)

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