Deep Learning Based Channel Estimation for MIMO-OFDM System with Modified ResNet Model

C Silpa; A Vani; K Rama Naidu

doi:10.17485/IJST/v16i2.2154

Article

Deep Learning Based Channel Estimation for MIMO-OFDM System with Modified ResNet Model

VIEWS 1722
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Indian Journal of Science and Technology

DOI: 10.17485/IJST/v16i2.2154

Year: 2023, Volume: 16, Issue: 2, Pages: 97-108

Original Article

Deep Learning Based Channel Estimation for MIMO-OFDM System with Modified ResNet Model

C Silpa^1,2*, A Vani³, K Rama Naidu⁴

¹Research Scholar, Department of Electronics and communication Engineering, JNTUA, Anantapur, Andhra Pradesh, India
²Assistant Professor, Department of Electronics and communication Engineering Malla Reddy Engineering College, Secunderabad, Telangana, India
³Assistant Professor, Department of Electronics and communication Engineering, Chaitanya Bharathi Institute of technology, Hyderabad, Telangana, India
⁴Professor Department of Electronics and communication Engineering JNTUA, Andhra Pradesh, Anantapur, India

*Corresponding Author
Email: [email protected]
[email protected]

Received Date:09 November 2022, Accepted Date:11 December 2022, Published Date:09 January 2023

This work is licensed under a Creative Commons Attribution 4.0 International License.

Abstract

Objectives: The effectiveness of wireless communication systems is significantly influenced by channel estimation. In order to accurately estimate the Channel Impulse Response (CIR) of the channel under varied circumstances, channel estimation is a crucial procedure in the functioning of MIMO-OFDM (Multi-Input and Multi-Output – Orthogonal Frequency Division Multiplexing) systems. Methods: The proposed Deep Learning(DL) based Convolutional Neural Network (CNN) with modified ResNet architecture channel estimation method improves the Bit Error Rate(BER) and Mean Square Error(MSE) performance compared to conventional channel estimation methods. We have compared the proposed CNN method with the Least square (LS), Minimum Mean Square Error(MMSE) and Deep Neural Network(DNN) based channel estimation methods. The results have been discussed by using BER and MSE versus SNR graphs. The simulation results are being performed on the MATLAB platform of the R2021b version. Findings: The DL-based MIMO-OFDM channel estimation can achieve better performance over multipath fading channels if Channel coefficients are perfectly estimated at the receiver. The simulation test is carried out in different test conditions by considering the different number of transmitter and receiver antennas with respect to different QAM modulation order values. Novelty: The DL-based modified ResNet architecture comprises a set of layers modified to estimate the optimal channel parameters. For achieving a great reduction of MSE and BER compared to conventional channel estimation methods, the layers of the ResNet– model are modified.

Keywords: Channel estimation; MIMOOFDM system; Deep learning; Neural network; ResNet

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Copyright

© 2023 Silpa et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Published By Indian Society for Education and Environment (iSee)