Star flash phase ranging method based on orthogonal matching pursuit and interpolation refinement

By constructing a delay-frequency implicit dictionary and a three-point parabola interpolation refinement method, the multipath resistance and ranging resolution of MCPD ranging are improved, the problems of high computational complexity and large storage overhead of traditional methods on embedded platforms are solved, and high-precision sub-meter ranging is achieved.

CN120779382AActive Publication Date: 2025-10-14TONGJI UNIV
4 Cites 0 Cited by

Patent Information

Application Number
CN202511294076.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-09-11
Publication Date
2025-10-14
Estimated Expiration
2045-09-11

AI Technical Summary

Technical Problem

The existing MCPD ranging method is susceptible to interference from reflection paths in multipath or non-line-of-sight scenarios, has poor ranging stability, and is difficult to achieve sub-step-level fine ranging. In addition, the traditional OMP method has high computational complexity and large storage overhead, making it difficult to run in real time on embedded platforms.

Method used

A ranging algorithm that combines orthogonal matching pursuit (OMP) sparse reconstruction with three-point parabola interpolation refinement is proposed. By constructing a delay-frequency implicit dictionary, OMP is used to iteratively estimate the main path delay, and the delay estimation is refined through three-point parabola interpolation, reducing computational complexity and storage overhead.

Benefits of technology

It achieves high-resolution sub-meter ranging on embedded platforms, has strong anti-multipath interference capabilities, low computational complexity, and low storage overhead, and is suitable for wireless positioning scenarios on narrowband platforms such as BLE and SLE.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention provides a phase ranging method based on the combination of orthogonal matching pursuit (OMP) and three-point interpolation refinement. The phase ranging method is suitable for a BLE / SLE narrowband wireless communication system. The method comprises the following steps: firstly, constructing a delay-frequency dictionary, obtaining a multi-channel phase vector through bidirectional phase measurement, and carrying out expansion and normalization processing on the multi-channel phase vector; then, using an OMP algorithm to select an atom which is most matched with the measurement phase in a dynamically generated predefined dictionary, and obtaining rough time delay estimation; then, based on the selected atom and the matching amplitude of the two adjacent points, a three-point parabola interpolation formula is adopted to carry out sub-step size refinement on the time delay, and more accurate time delay estimation is obtained; and finally, converting the refined time delay into a distance value. According to the method, multipath interference is effectively suppressed through sparse modeling, a dictionary step size limit value is broken through through an interpolation step, the distance measurement precision is remarkably improved, and the method has good embedded deployment value.
Need to check novelty before this filing date? Find Prior Art