Affiliation:
1. Ministry of Education
2. Institute of Optical Fiber Sensing of Tianjin University
3. Taiyuan University of Technology
4. University of Warwick
Abstract
We propose a novel, to our knowledge, step-adaptive cross-correlation algorithm tailored for distributed acoustic sensing systems based on linear frequency modulation pulses, aiming for rapid demodulation. This algorithm adjusts its step length through an adaptive “successive refinement” search strategy, which greatly improves computational efficiency by reducing the number of cross-correlation computations. Experimental results have shown that the demodulation time can be reduced by approximately 15 times compared to the conventional method, while maintaining the same demodulation result.
Funder
National Natural Science Foundation of China
National Key Research and Development Program of China