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Bandwidth Estimation and Power Distribution in Phase-Modulated Signals Using Bessel Function Analysis

Authors

Dhiraj Saxena

Department of Physics, Lachoo Memorial College of Science & Technology, Jodhpur (Raj.) (IN)

Article Information

DOI: 10.51583/IJLTEMAS.2026.15020000070

Subject Category: communication engineering

Volume/Issue: 15/2 | Page No: 809-815

Publication Timeline

Submitted: 2026-03-16

Published: 2026-03-16

Abstract

This work presents a comprehensive spectral analysis for bandwidth estimation of phase-modulated (PM) signals using Bessel functions of the first kind. The mathematical framework of phase modulation is developed and expressed through Fourier–Bessel expansion, revealing the role of modulation index in determining sideband amplitudes and spectral distribution. Numerical simulations confirm theoretical predictions and demonstrate the redistribution of carrier power among sidebands with increasing phase deviation. The results provide analytical insight useful for communication system design and bandwidth optimization.

Keywords

Phase modulation, Bessel function, spectral analysis, modulation index, sidebands, communication theory.

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References

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