Digital Phase-Locked Loop (DPLL)
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In this document, we discuss the application of Digital Phase-Locked Loops (DPLL). A DPLL is a technique that utilizes a digital implementation of the Costas loop to achieve carrier phase tracking. DPLLs have widespread applications in communications and signal processing fields. They can be used for frequency synthesis, clock recovery, modulation/demodulation, and signal reconstruction. By implementing a digital Costas loop structure, typically involving phase detectors, loop filters, and numerically controlled oscillators (NCOs), we can precisely control and track signal phase, thereby enhancing system performance and stability. Common implementation approaches include using coordinate rotation digital computer (CORDIC) algorithms for phase calculation and digital signal processors (DSPs) for real-time loop control.
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