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In this paper, a 0.32 THz imaging radar system was built and experiment on a precession warhead model is presented. The imaging algorithm based on range-instantaneous Doppler algorithm is adopted and high resolution ISAR imaging results are obtained. From these imaging results, we can easily recognize structures and even the subtle structures of the precession target, which verify the advantages of...
Vibration signature extraction and vehicle type identification are traditional aspirations in micro-Doppler domain. Radar echoes from vibrating targets can be modeled as frequency-modulated signals, with micro stochastic Doppler components in phase item. In this work, the sinusoidal frequency modulation Fourier transform (SFMFT) in sinusoidal frequency modulated signal space is proposed, which owns...
Orthogonal Frequency-Division Multiplexing (OFDM) phase-coded pulse is a wideband signal, of which the range resolution is inversely proportional to the bandwidth. However, it is a challenge to synthesize large bandwidth for OFDM phase-coded pulse since wide instantaneous bandwidth and high sampling rate requirements. To solve this problem, this paper proposes a new radar signal called OFDM phase-coded...
Due to good balance among spectrum efficiency, ambiguity function and peak-to-mean envelope power ratio (PMEPR), wideband Multi-Carrier Phase-Coded (MCPC) radar has caught much attention from researchers recently. Based on separation of sub carriers from multi-frequency structure, this paper provides velocity estimation method for such radar signal. After detecting the peek Doppler spectrum of each...
The range Doppler algorithm (RDA) is based on Taylor series expansion for the transfer function (TF) phase component, resulting in increasing phase error as the range frequency or the squint angle increases. We introduce Legendre orthogonal polynomials into synthetic aperture radar data processing steps to replace Taylor series expansion used in approximating the TF phase. A novel range Doppler imaging...
A space-time joint estimated algorithm, SAFE algorithm, is developed to estimate azimuth angle and Doppler frequency of targets within one beam width in this paper. The algorithm applies the multi-channel super-resolution technique to the single-channel scanning system radar in order to improve the estimated precision of azimuth angle. Theory and simulation analysis verifies the validity of the algorithm...
A space-time joint estimated algorithm, SAFE algorithm, is developed to estimate azimuth angle and Doppler frequency of targets within one beam width in this paper. The algorithm applies the multi-channel super-resolution technique to the single-channel scanning system radar in order to improve the estimated precision of azimuth angle. Theory and simulation analysis verifies the validity of the algorithm...
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