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MST radar system based on unit-level digital array, and signal transceiving method

A MST radar and digital array technology, applied in the field of radar detection, can solve the problems of complex feed network, poor reliability, and fixed detection beam pointing, etc., to improve time resolution and spatial resolution, reduce feed loss, and improve scanning efficiency effect

Pending Publication Date: 2020-08-14
航天新气象科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects of fixed detection beam pointing, complex feeding network, and poor reliability in the prior art, thereby providing a MST radar system and signal transceiving method based on unit-level digital arrays

Method used

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  • MST radar system based on unit-level digital array, and signal transceiving method
  • MST radar system based on unit-level digital array, and signal transceiving method
  • MST radar system based on unit-level digital array, and signal transceiving method

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Embodiment 1

[0047] This embodiment provides a MST radar system based on unit-level digital arrays, such as figure 1 As shown, it includes multiple antenna feeder units, multiple digital transceiver channels, digital beamforming unit, signal processing unit and main control unit. in:

[0048] The antenna feed unit may be an antenna oscillator, and each antenna oscillator transmits an electromagnetic wave signal to the outside and receives an echo signal reflected from the outside.

[0049] Each of the digital transceiving channels is in one-to-one correspondence with the antenna feeder units, and is used for independently generating electromagnetic wave signals to be transmitted to the outside, and independently transmitting echo signals received by each of the antenna feeder units. Among them, the electromagnetic wave signal generated by the digital transceiver channel is transmitted to the antenna feeder unit through the radio frequency cable, and the echo signal received by the antenna...

Embodiment 2

[0065] This embodiment provides a signal receiving method of MST radar, such as figure 2 shown, including the following steps:

[0066] S210: Multiple antenna feed units respectively receive spatially scattered echo signals through antenna elements, and transmit the echo signals to corresponding digital transceiver channels.

[0067] S220: Each digital transceiver channel receives an echo signal from a corresponding antenna element, and performs filtering, amplification, and analog-to-digital conversion processing on the echo signal.

[0068] S230: The digital beamforming unit receives the echo signals processed by each of the digital transceiving channels, and regulates the directivity of the received echo signals to generate digital beams with specific directivity.

[0069] S240: The signal processing unit receives the digital beam generated by the digital beam forming unit, and processes and calculates the digital beam to obtain meteorological feature data.

[0070] Exem...

Embodiment 3

[0076] This embodiment provides a signal transmission method of MST radar, such as Figure 4 shown, including the following steps:

[0077] S410: Each digital transmission channel independently generates an electromagnetic wave signal with controlled amplitude and phase, and sends the electromagnetic wave signal to the antenna feeder unit based on a preset transmission frequency.

[0078] S420: Each antenna element in the antenna feed unit transmits the received electromagnetic wave signal into the air to irradiate the target.

[0079] In the MST radar signal transmission method proposed in this embodiment, each digital transmission channel is directly connected to the corresponding antenna feeder unit, which can independently control the amplitude and phase of the electromagnetic wave emitted by the antenna feeder unit, so that the MST radar can simultaneously Scanning in multiple directions increases the flexibility and accuracy of radar detection.

[0080]Those skilled in...

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Abstract

The invention provides an MST radar system based on a unit-level digital array, and a signal transceiving method. The radar system comprises: a plurality of antenna feed units, wherein each antenna feed unit transmits an electromagnetic wave signal to the outside and receives an echo signal reflected by the outside; a plurality of digital transmit-receive channels which are in one-to-one correspondence with the antenna feed units and are used for independently generating electromagnetic wave signals emitted to the outside and independently transmitting the echo signals; a digital beam formingunit respectively connected with each digital receiving and transmitting channel and used for generating a digital beam with specific directivity for the echo signal received by each digital receivingand transmitting channel; a signal processing unit connected with the digital beam forming unit and used for processing and calculating the received digital beams to obtain meteorological characteristics; and a main control unit respectively connected with the plurality of digital transceiving channels, the digital beam forming unit and the signal processing unit so as to send corresponding control signals.

Description

technical field [0001] The invention relates to the technical field of radar detection, in particular to an MST radar system based on a unit-level digital array and a signal sending and receiving method. Background technique [0002] MST radar (mesosphere-stratosphere-tropospheric radar) is a large-scale ground-based remote sensing device that uses the scattering of electromagnetic waves by atmospheric refractive index changes to obtain information such as wind field and electron density. MST radar generally works in the VHF frequency band, and the detection height covers the mesosphere, stratosphere, and troposphere, and the echo signal is relatively weak. Generally, a front with high power and large aperture is used. [0003] Chinese invention patent application CN102141619A discloses a digital array MST radar, which can be divided into two parts: analog and digital. Among them, the analog part includes antenna units (576), final transceiver module (576) and feeder networ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/95G01S7/41G01S7/292G01S7/285
CPCG01S13/95G01S7/41G01S7/292G01S7/285Y02A90/10
Inventor 陈俊王斯正孙祥杨庆峰王勇贾晓星王志锐陈华彬刘红召王硕
Owner 航天新气象科技有限公司
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