Radar real-time signal processor
A real-time signal and processor technology, which can be used in instruments, measurement devices, and re-radiation to solve the problems of high system complexity and cost
Active Publication Date: 2021-04-20
北博(厦门)智能科技有限公司
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Problems solved by technology
The traditional calculation method of complex aperture complex correlation in the existing radar system is realized by radio frequency analog circuit, that is to say, it needs to be realized through a large-scale receiver array at the same time, and the system complexity and cost are high. This patent adopts a probability-based Power measurement real-time signal processing circuit and algorithm, realize the back-end complex correlation calculation of synthetic aperture interferometric imaging technology, simplify the system and reduce the cost
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[0031] Embodiments of the present invention will be described below with reference to the drawings. Elements and features described in one drawing or one embodiment of the present invention may be combined with elements and features shown in one or more other drawings or embodiments. It should be noted that representation and description of components and processes that are not related to the present invention and known to those of ordinary skill in the art are omitted from the drawings and descriptions for the purpose of clarity.
[0032] In the description of the present invention, it should be understood that the terms "first", "second", and "third" are used for description purposes only, and should not be understood as indicating or implying relative importance.
[0033] In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, f...
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The invention discloses a radar real-time signal processor, which includes: a sampling module, a threshold estimation module, a power measurement module, a correlation operation module I, a correlation operation II module, a state switch, a scheduling control module, visibility function sample generation and correction module and inversion imaging module. This system adopts a power measurement algorithm based on probability and statistics. The basic principle is: for an input signal V with zero mean Gaussian distribution, a threshold V is preset. T , then the signal power σ 2 and the right-tailed probability P{V>V T} has a definite relationship: σ 2 =f(P). Therefore, the power of the signal can be obtained only by counting the probability of samples exceeding the threshold, which greatly simplifies the circuit system and reduces the cost. In addition, for the DC offset of the mean value of the sampling results in the actual system, error correction is also carried out in the system.
Description
technical field [0001] The invention relates to the field of millimeter wave synthetic aperture imaging and radar signal processing, in particular to a power measurement real-time signal processing circuit and algorithm based on probability statistics. Background technique [0002] Millimeter-wave synthetic aperture imaging radar is a system that uses synthetic aperture interferometric imaging technology to measure field-of-view brightness and temperature images, and is widely used in military reconnaissance and microwave remote sensing. At present, with the maturity of passive millimeter-wave synthetic aperture imaging technology, its system implementation has become a focus of research at home and abroad. The traditional calculation method of complex aperture complex correlation in the existing radar system is realized by radio frequency analog circuit, that is to say, it needs to be realized through a large-scale receiver array at the same time, and the system complexity ...
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IPC IPC(8): G01S13/89G01S7/02
CPCG01S7/02G01S13/89
Inventor 谢衍王焕华
Owner 北博(厦门)智能科技有限公司