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Waveforms with low autocorrelation sidelobes are favorable to weak target detection and synthetic aperture radar (SAR) imaging. In this paper, we aim at solving the problem of designing waveforms with low autocorrelation sidelobes at specified intervals. Thus an amplitude optimization method (AOM) is proposed to minimize the weighted integrated sidelobe level (WISL) of the autocorrelation. By regarding...
In this paper, the problem of extended targets detection in signal-dependent interference based on orthogonal frequency division multiplexing (OFDM) waveform is addressed. Compared with other radar waveforms, OFDM has a thumbtack ambiguity function and the spectrum can be elaborately designed through changing the complex weights transmitted over different subcarriers. First, the optimal waveform design...
A new method for designing transmitted sequence and receive filter in the signal-dependent clutter and signal-independent interference environment is proposed. The mean-square error of point-like target scattering coefficient estimates is considered as the measurement of the radar system. Both the finite energy constraint and the similarity constraint are enforced for controlling certain characteristics...
An essential part of SAR processing is the estimation of the Doppler parameters of the received data-the Doppler centroid and the Doppler frequency rate. This paper proposes a Doppler parameters estimation technique for squint SAR imaging, where the estimation of the Doppler frequency rate is dependent on that of the Doppler centroid. It estimates the Doppler centroid based on the relationship of...
In the radar system, modelling and simulation can guarantee the high reliability and correctness of system design, shorten designing period and reduce development cost. This paper discusses signal processing system of the SFR (stepped-frequency radar), especially the several key processing steps to get the HRRP (high resolution rang profile). The system simulation has done based on LabVIEW (Laboratory...
In stepped-frequency imaging radar, stitching the high range resolution profiles of different sampling intervals is very important to obtain the whole profile of the range gate. Current stitching methods usually operate under the assumption of over sampling and low target-to-radar velocity to avoid profile distortion. Therefore, these methods are under critical challenges in application. This paper...
Automatic target recognition (ATR) performance evaluation has become an important subject in ATR theory community since the last two decades. The extended operation condition (EOC) and system cost are two key aspects in ATR performance evaluation. For the situation of air-to-ground (A-G) ATR using high range resolution (HRR) data, this paper analyzes the influence of target type number on ATR system...
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