Radar moving target detection method based on short-time sparse fractional Fourier transform (ST-SFRFT)
A fractional-order Fourier transform and moving target detection technology, which is applied in measuring devices, radio wave measurement systems, radio wave reflection/reradiation, etc., can solve the problem of large amount of calculation, lack of time domain positioning, and failure to reflect signal frequency Variable characteristics and other issues, to achieve high parameter estimation accuracy, ensure energy accumulation, and improve the effect of SCR
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment Construction
[0021] In order to explain the sparse time-frequency representation of the moving target echo signal involved in the present invention, a Time-Frequency Distribution (TFD) model of the time-varying non-stationary signal is first given.
[0022] After pulse compression, the radar moving target signal can be modeled as a Frequency Modulated (FM) signal with amplitude fluctuations, namely
[0023]
[0024] In the formula, a(t m ) is the envelope of the signal, t m is the slow time between pulses, is the signal phase.
[0025] In practical engineering applications, according to the length of radar observation and signal accumulation time, the echo signal of the maneuvering target can be approximated as a Linear FM (LFM) signal to describe the velocity and acceleration motion state of the target. Although high-order phase signals (such as quadratic frequency modulation signals or polynomial signals) can more accurately describe time-varying signals, the subsequent coherent a...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com