Fixed target time domain positioning method of bistatic radar
A fixed target, time domain positioning technology, applied in the field of radar, can solve problems such as vulnerability to local interference or anti-radiation missile attack, increase in system cost, etc.
Inactive Publication Date: 2015-12-09
ZHOUKOU NORMAL UNIV
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Problems solved by technology
Therefore, if the traditional monostatic radar wants to improve the positioning accuracy, it needs to use a large-aperture antenna and a large bandwidth to transmit signals, which greatly increases the cost of the entire system
Moreover, due to the single-base approach, it is vulnerable to local interference or anti-radiation missile attacks in modern warfare, and its survivability faces great challenges
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[0035] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.
[0036] The invention provides a bistatic radar fixed target time domain positioning method, comprising the following steps:
[0037] Step 1, establish a dual-base positioning system model. In two-dimensional space, the fixed size of the target is much smaller than the distance from the target to the receiver, and smaller than the radar beam width, so it can be regarded as a point ...
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The invention discloses a fixed target time domain positioning method of a bistatic radar, wherein the method comprises the steps of a step1, establishing a bistatic positioning system model; a step2, deriving the slant range progress of a single-scattering-point target; a step3, deriving a single-scattering-point target echo signal model after demodulation, and performing discretization on the single-scattering-point target echo signal model; a step4, constructing a three-dimensional signal matching matrix; and a step5, estimating the target position through calculation of an echo signal and the signal matching matrix, thereby realizing target positioning. The fixed target time domain positioning method has relatively high viability as a bistatic radar mode is used. The positioning precision of a proposed positioning system does not depend on signal bandwidth. A narrowband signal or a single-frequency continuous wave signal can be adopted. Low requirement for a transmitter and cost reduction of the whole system are realized. Relatively low calculation complexity of a positioning algorithm, high robustness and relatively high positioning precision are realized. Furthermore a plurality of target positions in an observation area can be simultaneously observed.
Description
technical field [0001] The invention belongs to the technical field of radar, and in particular relates to a time-domain positioning method for a bistatic radar fixed target, which is mainly used for detecting fixed targets in a large area. Background technique [0002] Fixed target positioning is an important content of battlefield situation awareness in modern warfare, and it is of great significance in enemy situation detection. At present, monostatic radar realizes target positioning by measuring the target distance and target angular position. The ranging accuracy is affected by the bandwidth of the transmitted signal, the larger the bandwidth, the higher the accuracy. Angle measurement accuracy is affected by the antenna aperture, the larger the antenna aperture, the higher the angular resolution. Therefore, if the traditional monostatic radar wants to improve the positioning accuracy, it needs to use a large-aperture antenna and a large bandwidth to transmit signals...
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IPC IPC(8): G01S13/06
CPCG01S13/06
Inventor 刘玉春朱海程全姚遥张利红程琳李晋豆桂平
Owner ZHOUKOU NORMAL UNIV