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Pilot based Channel Estimation and SCGNN based Equalization for MIMO-OFDM System

by Zeeshan A. Abbasi, Zainul Abdin Jaffery
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International Journal of Computer Applications
Foundation of Computer Science (FCS), NY, USA
Volume 131 - Number 3
Year of Publication: 2015
Authors: Zeeshan A. Abbasi, Zainul Abdin Jaffery
10.5120/ijca2015907205

Zeeshan A. Abbasi, Zainul Abdin Jaffery . Pilot based Channel Estimation and SCGNN based Equalization for MIMO-OFDM System. International Journal of Computer Applications. 131, 3 ( December 2015), 11-15. DOI=10.5120/ijca2015907205

@article{ 10.5120/ijca2015907205,
author = { Zeeshan A. Abbasi, Zainul Abdin Jaffery },
title = { Pilot based Channel Estimation and SCGNN based Equalization for MIMO-OFDM System },
journal = { International Journal of Computer Applications },
issue_date = { December 2015 },
volume = { 131 },
number = { 3 },
month = { December },
year = { 2015 },
issn = { 0975-8887 },
pages = { 11-15 },
numpages = {9},
url = { https://ijcaonline.org/archives/volume131/number3/23428-2015907205/ },
doi = { 10.5120/ijca2015907205 },
publisher = {Foundation of Computer Science (FCS), NY, USA},
address = {New York, USA}
}
%0 Journal Article
%1 2024-02-06T23:26:17.348167+05:30
%A Zeeshan A. Abbasi
%A Zainul Abdin Jaffery
%T Pilot based Channel Estimation and SCGNN based Equalization for MIMO-OFDM System
%J International Journal of Computer Applications
%@ 0975-8887
%V 131
%N 3
%P 11-15
%D 2015
%I Foundation of Computer Science (FCS), NY, USA
Abstract

In this paper a new channel equalization technique is described based on Scaled Conjugate Gradient Neural Network (SCGNN) for Multiple Input Multiple Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM). To estimate the channel in frequency domain, Space Time Block Code (STBC) is used. At the beginning of each transmitted OFDM block the pilot sequence is inserted to estimate the channel. In the transmitter the 16-QAM modulation is used as it is efficient in conserving bandwidth. The performance is evaluated using MATLAB and various results are plotted at different values of SNR. It is observed from the simulation that the proposed channel estimation and equalization method greatly reduced the Symbol Error Rate. We are able to achieve the SER as low as 0.01at a very low value of SNR. The MMSE is also greatly reduced and the system converges very fast.

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Index Terms

Computer Science
Information Sciences

Keywords

Scaled Conjugate Gradient Network MIMO OFDM Equalization

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