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This research investigates the performance of wireless communication systems using Orthogonal Frequency-Division Multiplexing (OFDM), a widely adopted technique in modern standards such as Wi-Fi and 4G/5G due to its efficiency in handling frequency-selective fading. To evaluate OFDM under practical and simulated conditions, four experimental setups were developed using GNU Radio, MATLAB, ADALM-PLUTO, and RTL-SDR hardware. The first setup establishes an end-to-end wireless OFDM link between two devices using GNU Radio and SDRs, demonstrating real-time transmission and reception. The second setup employs the same transmitter but utilizes MATLAB at the receiver for enhanced measurements of signal strength and propagation effects. The third configuration loops the OFDM signal back to the same ADALM-PLUTO device, enabling controlled testing with minimized external interference. The final setup uses MATLAB simulations to analyze OFDM performance under various channel models, including free-space path loss (FSPL), Rayleigh, Rician, AWGN, and delay-line fading. Performance indicators such as Bit Error Rate (BER), Signal-to-Noise Ratio (SNR), Peak-to-Average Power Ratio (PAPR), and Quality of Service (QoS) are presented to quantify system behavior across the different scenarios.

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SDR-Based Performance Analysis of Wireless Channel Models

  • 会议论文

  • 发表日期：

    2026年

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  • A. Thyagaraja Murthy,
  • Sudarshan Patil Kulkarni,
  • B. Ganpath Singh

摘要

This research investigates the performance of wireless communication systems using Orthogonal Frequency-Division Multiplexing (OFDM), a widely adopted technique in modern standards such as Wi-Fi and 4G/5G due to its efficiency in handling frequency-selective fading. To evaluate OFDM under practical and simulated conditions, four experimental setups were developed using GNU Radio, MATLAB, ADALM-PLUTO, and RTL-SDR hardware. The first setup establishes an end-to-end wireless OFDM link between two devices using GNU Radio and SDRs, demonstrating real-time transmission and reception. The second setup employs the same transmitter but utilizes MATLAB at the receiver for enhanced measurements of signal strength and propagation effects. The third configuration loops the OFDM signal back to the same ADALM-PLUTO device, enabling controlled testing with minimized external interference. The final setup uses MATLAB simulations to analyze OFDM performance under various channel models, including free-space path loss (FSPL), Rayleigh, Rician, AWGN, and delay-line fading. Performance indicators such as Bit Error Rate (BER), Signal-to-Noise Ratio (SNR), Peak-to-Average Power Ratio (PAPR), and Quality of Service (QoS) are presented to quantify system behavior across the different scenarios.