An interference signal phase extraction method and system combining DPLL with Goertzel
By combining DPLL and the Goertzel algorithm, and employing sliding window iterative computation and scene adaptive switching, the problem of the incompatibility between dynamic tracking and steady-state accuracy in interferometric signal phase extraction by DPLL is solved, and high-precision phase measurement is achieved in all scenarios.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HARBIN INST OF TECH
- Filing Date
- 2026-06-10
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional DPLLs struggle to simultaneously achieve dynamic tracking performance and steady-state measurement accuracy in interferometric signal phase extraction. Existing optimization schemes cannot overcome the inherent defects of closed-loop systems, resulting in performance bottlenecks in precision measurements across all scenarios.
By combining DPLL and Goertzel algorithms, and through digital phase-locked loop closed-loop tracking and Goertzel frequency domain phase extraction, a sliding window iterative operation and scene adaptive switching mechanism are adopted to achieve real-time frequency tracking and high-precision phase extraction of interference signals.
It achieves high-precision phase measurement of interferometric signals in all scenarios, improves steady-state accuracy, and maintains dynamic tracking capability. It is suitable for engineering scenarios such as laser interferometry, communication signal demodulation, and precision vibration monitoring.
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