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At present, the vast majority of 3mm band measurement systems in China tend to use vector network analyzer, which has very limited use range and poor flexibility, instead of using a dedicated radar system. In this paper, a dedicated 94GHz high resolution stepped frequency radar for target characteristics measurement of 3mm band is designed and implemented. Some simulations have been carried out, and...
Millimeter wave have many advantages compared with microwave, a millimeter wave radar system based on stepped frequency pulse signal can be used to near-field imaging. The wave number domain algorithm is used to mechanical scanning data that achieved by a two-dimensional (2-D) planar aperture with the radar system to reconstruct three-dimensional (3-D) reflectivity image. Results show the efficiency...
Target reference template generation is a key technique for radar image matching guidance. The generation method selection mostly determines the overall performance of radar image matching guidance system. In this paper, a method of target reference template generation for image matching guidance with missile-borne SAR based on echo signal simulation of missile-borne SAR is presented. The feasibility...
The real sea-clutter data are always hard to analyze due to their instinct complexity, large scale non-stationary, and lack of fundamental understanding of the natural dynamics. Measurable modeling of sea clutter is an important precondition in many research areas and practical applications, such as salvage and marine radar signal processing. However, few works have been down on the time-frequency...
Human motion characteristics study based on radar is a new technique developed in recent years. This paper firstly analyzes the model of human radar returns, and then designs an X-band continuous wave radar for human motion characteristics measurement. Experiments for measuring the human motion characteristics have been performed based on the radar. The Doppler features of human motion are extracted...
As an essential approach of SAR image interpretation, a good pose estimation calls for two conditions: an accurate extraction of the scattering centers and a thorough exploration of the structural information among them. The article focuses on these two topics successively. Firstly, the power spectrum estimation methods are recommended to improve the scattering center resolution and the Minimum Variance...
This is the first investigation on converse beam cross sliding spotlight SAR (CBC sliding spotlight SAR) which was firstly proposed in this essay. In conventional sliding spotlight SAR, the azimuth scene extension is larger than that of a pure spotlight mode and the azimuth resolution of scatterers is higher than in classical stripmap mode. The geometry and properties of classical standard and inverse...
Different properties of two operation modes for cruise missile borne side looking instantaneous imaging synthetic aperture radar with linear array antenna along flight track were investigated. Its theoretical azimuth resolution was induced and a novel imaging algorithm called compound range-doppler algorithm was proposed. The imaging procedure was given and images were gained with both ECS and compound...
Study of frequency coded synthetic aperture radar was concerned in this paper. A new frequency-domain extracted IFFT approach (FDE-IFFT) to obtain high range resolution profile was proposed, and the mathematical principle of this new method was detailed analyzed. Simulation results and series of radar images using time domain back-projection method were given in the end. All results proved that the...
This paper defines series of important performance evaluation parameters to evaluate amplitude-phase (AP) algorithm comparing with that of block adaptive quantization (BAQ) algorithm. The evaluation procedure is carried out in two domains, raw data domain and image domain. Numerical experiments based on ERS-2 data show that AP algorithm provides us with more compression ratio (CR) choices than BAQ...
In radar target imaging, motion induces a range-Doppler coupling effect, which results in distortion in synthesizing a range profile for a moving target. To eliminate or suppress the distortion of the synthetic range profile, conventional technology such as motion compensation requires velocity estimation. Unfortunately, for a high-speed moving target, it is difficult to achieve real-time accurate...
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