Wide band rader utilizing multi-transmitting and multi-receiving frequency division signal and imaging method thereof

A multi-transmit and multi-receive, broadband radar technology, applied in the field of radar, can solve problems such as poor quality, achieve low performance requirements, reduce instantaneous bandwidth requirements, and overcome the effects of poor imaging quality

Inactive Publication Date: 2009-09-09
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to combine the idea of ​​multi-transmitting and multi-receiving frequency-division signals with broadband imaging radar, increase the repetition frequency of the radar system to overcome the defect of poor imaging quality of maneuvering targets, and provide A multifunctional radar system capable of simultaneous detection, tracking and imaging and its imaging method

Method used

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  • Wide band rader utilizing multi-transmitting and multi-receiving frequency division signal and imaging method thereof
  • Wide band rader utilizing multi-transmitting and multi-receiving frequency division signal and imaging method thereof
  • Wide band rader utilizing multi-transmitting and multi-receiving frequency division signal and imaging method thereof

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Embodiment 1

[0041] figure 1 A block diagram of a frequency division broadband radar system using multiple transmitters and multiple receivers is given. The radar system of this embodiment is mainly composed of a transmitting / receiving array antenna, a transmitter subsystem, a receiver subsystem, a clock source, a monitoring subsystem and a power supply. The transmitter subsystem of this embodiment includes M parallel sub-transmitters, which generate M-channel frequency division signals in total, and the receiver subsystem includes N parallel sub-receivers and signal processors, and the sub-receivers are M-channel Frequency Division Parallel Receiver. Each component of the radar system of this embodiment is described as follows:

[0042] ①Transmitting / receiving array antenna: The receiving antenna and the transmitting antenna can share a set of array antennas. figure 1 As shown by the dotted line in the middle, each extension of the receiver and each extension of the transmitter are c...

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Abstract

The invention relates to a wide-band radar figure method used the multi-emitter and multi-receiver frequency molecular signal. It includes the below process: 1. the M array unit of the radar emitter emit M frequency molecular band signal; 2. the radar receiver is made up of N receiving array units which is set with M receiving channels matched to the M frequency molecular band signal, so it can get M*N channels of the echo signal; 3. disposing the M*N channels of the echo signal and finishing the object detection then it composes the many echoes into the high resolution figure in the object location and the distance. The invention has decreased the need of the radar to the instantaneous bandwidth; also the radar has the ability of the electronic scanning to complete the object detecting, tracking and figure.

Description

technical field [0001] The invention belongs to the technical field of radar, in particular, the invention relates to a broadband radar and an imaging method thereof. Background technique [0002] With the development of radar imaging technology, such as synthetic aperture radar (SAR), inverse synthetic aperture radar (ISAR), and radar identification technology, the distance resolution required by radar is getting higher and higher, so the required radar signal bandwidth is getting higher and higher. bigger and bigger. How to realize the transmission and reception of broadband signals has always been a difficult point in radar system design, and it is also a standard to distinguish many radar working systems. According to different broadband signal generation and signal processing methods, the methods for obtaining broadband signals and high-resolution one-dimensional range images can be divided into three categories: the imaging method using the step frequency hopping syst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/00G01S7/02G01S7/282G01S7/285H04B7/04
Inventor 许稼彭应宁戴喜增王秀坛叶春茂许嘉
Owner TSINGHUA UNIV
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