Design of Digital Filters for Noise Reduction in RF Communication Systems

Abstract: Noise in radio frequency (RF) communication systems, such as thermal noise and interference from nearby channels, often disrupts signal clarity and lowers the signal-to-noise ratio (SNR). In this paper, we focus on tackling this problem by designing a finite impulse response (FIR) digital filter to effectively reduce noise and enhance signal quality. The filter is tailored to suppress high-frequency noise while ensuring the desired signal remains intact. Through simulations, we evaluated the filter’s performance in both time and frequency domains. The results showed a significant boost in SNR, from 18 dB to 35 dB, after filtering. The frequency response of the filter successfully attenuated unwanted noise above the 200 kHz cutoff, and its computational efficiency makes it practical for real-time applications. Keywords: RF communication, noise reduction, FIR filter, signal-to-noise ratio (SNR), interference, digital signal processing, real-time applications. Title: Design of Digital Filters for Noise Reduction in RF Communication Systems Author: Md Minhajul Amin, K M Shihab Hossain, Md Shahriar Atik Shifat, Md Nagib Mahfuz Sunny, Sadia Binte Arju International Journal of Novel Research in Electrical and Mechanical Engineering ISSN 2394-9678 Vol. 12, Issue 1, September 2024 - August 2025 Page No: 14-21 Novelty Journals Website: www.noveltyjournals.com Published Date: 04-November-2024 DOI: https://doi.org/10.5281/zenodo.14034150 Paper Download Link (Source) https://www.noveltyjournals.com/upload/paper/Design%20of%20Digital%20Filters%20for%20Noise-04112024-4.pdf