Hemanta Kumar Sahu

Work place: School of Electronics Engineering, Vellore Institute of Technology, Vellore – 632014, Tamil Nadu, India

E-mail: hemanta.sahu@vit.ac.in

Website: https://orcid.org/0000-0002-0530-9061

Research Interests:

Biography

Hemanta Kumar Sahu received a B.Tech degree in Electronics and Instrumentation Engineering and an M.Tech in VLSI and Embedded Systems. In 2020, he awarded with PhD from IIT Bhubaneswar, India. Currently, he serves as an assistant professor at VIT, Vellore where he focuses on hybrid communication systems, renewable energy integration, etc. He has authored/co-authored numerous publications in esteemed journals such as IEEE Communication Letters and Transactions, and conferences. Beyond his academic and research endeavors, he actively fosters interdisciplinary collaboration and mentors young professionals in the field. He has also served as a reviewer for several prestigious journals, further highlighting his dedication to advancing knowledge in wireless communications.

Author Articles
Analysis of Binary Modulations Using Channel Estimation with Machine Learning

By Srijita Maity Sanjana Bhattacharjee Hemanta Kumar Sahu

DOI: https://doi.org/10.5815/ijwmt.2025.04.04, Pub. Date: 8 Aug. 2025

To ensure robust signal recovery and efficient data transmission in wireless communication systems, accurate channel estimation plays a vital role, especially under dynamic and complex conditions. Machine learning-based channel estimation is explored for binary phase shift keying (BPSK) and quadrature phase shift keying  (QPSK) modulation schemes over Rayleigh, Rician, and Gaussian fading models. In this work, a framework using Convolutional Neural Networks (CNN) and Multilayer Perceptrons (MLP) is developed to predict channel coefficients and analyze the impact on bit error rate (BER), throughput, and spectral efficiency for binary modulations. A comprehensive performance comparison of BPSK and QPSK under ML-based estimation across various fading conditions is provided. The results show that CNNs are effective in tracking time-varying coefficients, while MLPs often yield lower mean squared error (MSE). The study emphasizes practical applications in low-SNR environments and supports energy-efficient designs aligned with SDG goals. Key simulation results include BER vs SNR, throughput, and spectral efficiency comparisons between BPSK and QPSK under ML estimation.

[...] Read more.
Other Articles