A New Method for Moving-Target HRRP via Double Step Frequency Verified by Simulation.

Area of Science:

• Radar Signal Processing
• Target Motion Analysis
• Electromagnetics

Background:

• Stepped-frequency (SF) waveforms are sensitive to target motion, causing range shifts and echo spread in high-range-resolution profiles (HRRP).
• Existing methods struggle with accurately characterizing moving targets and can produce false peaks.
• Improved HRRP for moving targets is crucial for advanced radar applications.

Purpose of the Study:

• To propose a novel method for obtaining stationary high-range-resolution profiles (HRRP) of moving targets.
• To enhance the signal-to-noise ratio (SNR) and eliminate false peaks in HRRP.
• To adapt radar imaging techniques for higher speed targets.

Main Methods:

• Utilizing a cross-transmitted double-stepped frequency (DSF) waveform.
• Applying phase-cancellation techniques.
• Employing inverse discrete Fourier transform (IDFT) and complex multiplication for stationary HRRP generation.

Main Results:

• Successfully obtained stationary HRRP for moving targets.
• Eliminated false peaks generated by previous methods.
• Significantly improved the signal-to-noise ratio (SNR) of the HRRP.
• Demonstrated adaptability to higher speed targets due to the DSF waveform.

Conclusions:

• The proposed cross-transmitted DSF waveform and phase-cancellation method effectively generates stationary HRRP for moving targets.
• The method offers improved SNR and eliminates artifacts, outperforming existing techniques.
• This approach enhances radar capabilities for tracking high-speed targets.