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Software secondary surveillance radar signal processing system based on USRP

A technology for secondary surveillance radar and signal processing, applied in the field of radar signals, it can solve the problems of inability to obtain original signal data, inability to fully demonstrate technical details, and long development time, so as to shorten the time to market and shorten the time for hardware design. , the effect of reducing R&D costs

Active Publication Date: 2021-12-03
四川九洲空管科技有限责任公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional secondary surveillance radar is composed of multiple hardware modules, and its disadvantages are as follows: there are many hardware modules, and the cost is high; maintenance is difficult, fault location is difficult, and fault repair costs are high; functions are designed according to original requirements, and function expansion is difficult and expensive ;Unable to obtain the original signal data and lose key information
[0005] In the prototyping stage of software-based SSR, if the hardware is customized and developed, it may cause the following disadvantages: the technical details cannot be fully demonstrated; the cost is high; the development time is long

Method used

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  • Software secondary surveillance radar signal processing system based on USRP
  • Software secondary surveillance radar signal processing system based on USRP

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Embodiment 1

[0026] refer to figure 1 As shown, the invention discloses a USRP-based software secondary surveillance radar signal processing system.

[0027] The present invention uses one USRP-2945R, one USRP-2950R, two PCIe-8381s, and one computer to form a secondary surveillance radar signal processing system. The antenna feed system adopts the antenna of the active service system, and its hardware structure is as follows: figure 1 shown.

[0028] Preferably, USRP-2945R has 4 receiving channels, sharing the local oscillator. In this embodiment, its 3 channels are used to receive signals of the sum channel, the difference channel and the control channel. Since the 4 channels use the same local oscillator, the consistency of the amplitude and phase of each channel can be guaranteed, so as to ensure the accuracy of the angle measurement of the secondary radar and the differential channel.

[0029] Furthermore, the AUX I / O interface of the USRP-2945R is used to receive the antenna azimu...

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Abstract

The invention discloses a software secondary surveillance radar signal processing system based on a USRP. The software secondary surveillance radar signal processing system comprises an antenna feed system, a USRP-2945R, a USRP-2950R, a computer and two PCIe bridging cards arranged in the computer, the USRP-2945R is configured to complete signal receiving of a sum channel, a difference channel and a control channel of the antenna feeder system by using three receiving channels; the AUX I / O interface of the USRP-2945R is configured to be used for receiving an antenna orientation code and a trigger signal for inquiry transmission; the USRP-2950R is configured to use two transmitting channels to complete signal transmission of a sum channel and a control channel of the antenna feeder system; the AUX I / O interface of the USRP-2950R is configured to be used for receiving the azimuth code of the antenna and outputting a trigger pulse of inquiry to the USRP-2945R at the same time; the computer is respectively connected with the two USRPs through two built-in PCIe bridging cards and PCIe extension lines; and based on a USRP hardware platform, a software secondary surveillance radar signal processing system is built, and rapid prototype design and verification of functions and algorithms in the design and development stage of the software secondary surveillance radar are achieved.

Description

technical field [0001] The invention belongs to the technical field of radar signals, in particular to a USRP-based software secondary surveillance radar signal processing system. Background technique [0002] Software-defined radio technology: is a radio broadcast communication technology that is based on a software-defined wireless communication protocol rather than hardwired. Frequency bands, air interface protocols and functions can be upgraded through software downloads and updates without a complete hardware replacement. USRP is a general development platform based on software radio framework of NI Company, and has a complete development environment. Using the platform, rapid development and validation of projects is possible with custom software. [0003] Software-based secondary surveillance radar: traditional secondary surveillance radar is mainly composed of antenna feeder system, radio frequency transceiver, intermediate frequency module, baseband module, decodi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/76G01S7/02
CPCG01S13/76G01S7/02Y02A90/10
Inventor 段煜郑超李武旭
Owner 四川九洲空管科技有限责任公司
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