Costas Loop Carrier Synchronization Simulation
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We conducted a simulation of the most fundamental Costas loop carrier synchronization algorithm, a widely-used synchronization technique in digital communication systems. The core principle employs a negative feedback mechanism to adjust the frequency of a local oscillator, matching it with the carrier frequency of the received signal. This algorithm sees extensive application due to its high synchronization precision, which enhances communication reliability and efficiency. In our MATLAB-based simulation, we implemented key components including phase detectors, loop filters, and voltage-controlled oscillators (VCOs) to model the closed-loop tracking behavior. Our results demonstrate varying algorithm performance under different signal-to-noise ratios and frequency offset conditions. We also explored modified algorithms incorporating additional filtering stages and adaptive step-size controls to further improve synchronization robustness and convergence speed.
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