College - Author 1
College of Engineering
Department - Author 1
Electrical Engineering Department
Advisor
Payam Nayeri, College of Engineering, Electrical Engineering department
Acknowledgements
The Electrical Engineering department, The National Science Foundation, Grant Number HRD-1826490. A grant from Amateur Radio Digital Communications.
Date
10-2024
Abstract/Summary
This project presents the design and implementation of a portable, remotely programmable amateur radio system operating on the 2-meter and 70-cm bands. The system utilizes Raspberry Pi 5 and LimeSDR hardware to facilitate communication between aerial and ground units, allowing for efficient transmission and reception of synchronization and calibration waveforms. A custom communication protocol incorporating BPSK modulation and a two-tone signaling mechanism enables time-of-flight measurements for calculating distances between nodes. This low-cost solution has potential applications in civilian sectors, such as search and rescue operations, where accurate direction finding and target localization are critical. Full-duplex operation enhances the system's capability to conduct simultaneous transmission and reception, reducing latency and improving the reliability of time-of-flight data. Initial results demonstrate successful signal transmission and reception with high data accuracy. Future work includes enhancing error correction and implementing advanced waveform capture techniques for further system robustness.
October 1, 2024.
URL: https://digitalcommons.calpoly.edu/ceng_surp/44