PROBLEM TO BE SOLVED: To achieve a Doppler calculation device for determining a relative speed to a target object and approach/departure by an IQ detection method in a small scale so that the Doppler calculation device is capable of processing speedily.YONEDA KIMIHISA...
The invention relates to an estimation method for the rotation micro Doppler frequency based on radar HRRP. The estimation method comprises the following steps that 1) HRRPs of a radar object are obtained, and the HRRPs corresponding to different echoes are arranged in rows to form a 2D ...
Then, the process of demodulation, Fast Fourier Transform (FFT) and phase difference calculation is done to find the frequency offset. Next, the amount of frequency offset is added to the initial frequency estimation value. Finally, the scheme is implemented in hardware design of FPGA. The ...
The Differenced Range (DR) Versus Integrated Doppler (ID) (DRVID) method exploits the opposition of high-frequency signal versus phase retardation by plasma media to obtain information about the plasma's corruption of simultaneous range and Doppler spacecraft tracking measurements. Thus, DR Plus ID...
PURPOSE:To enable analysis of a frequency at a high accuracy in a short time by setting a sampling frequency for a maximum accuracy area to determine a Doppler shift frequency with the detection of a peak of a frequency spectrum by a linear prediction coefficient obtained. CONSTITUTION:A down ...
The difference between the emitted frequency and the reflected frequency is used to determine the speed of the vehicle. A computer inside the gun performs the calculation instantly and displays a speed to the officer. Doppler Radar Meteorologists use a similar principle to read weather events. In ...
The technique allows precise angle-of-arrival (AOA) and radio frequency measurements on non-cooperative radar signals, by exploiting precise phase measurement capabilities of frequency measurement rec
Radar Doppler Frequency Shift Equation This equation applies generally to any value of VMovingTarget; however, forVMovingTarget<< c,VMovingTarget- c→cand the equation simplifies to the ones shown below. Note:The factor of 2 in the equation is due to a Doppler shift occurring both for the ...
Ocean Surface Wind Retrieval From Dual-Polarized SAR Data Using the Polarization Residual Doppler Frequency An alternative approach to sea surface wind retrieval using synthetic aperture radar (SAR) stripmap (SM) data is explored in this paper, using both the pol... F Said,H Johnsen - 《IEEE ...
This paper presents a method and results for the estimation of residual Doppler frequency, and consequently the range velocity component of point targets in single-channel synthetic aperture radar (SAR) focused single-look complex (SLC) data. It is still a challenging task to precisely retrieve the...