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Multi-channel synchronization method applied to phased-array radar

A phased array radar and multi-channel technology, applied in the field of synchronization, can solve the problem of no reasonable solution for multi-channel digital systems, and achieve the effect of satisfying beam pointing and ensuring synchronous work

Active Publication Date: 2019-04-26
NO 20 RES INST OF CHINA ELECTRONICS TECH GRP
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AI Technical Summary

Problems solved by technology

[0005] Most of the multi-channel synchronization schemes that have been realized at this stage are aimed at digital multi-channel systems with low sampling frequency (below 200MHz), but there is no reasonable solution for multi-channel digital systems with high sampling frequency (above 500MHz)

Method used

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  • Multi-channel synchronization method applied to phased-array radar
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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, and the present invention includes but not limited to the following embodiments.

[0021] see figure 1 , the digital system of the multi-channel synchronization method of the phased array radar includes N digital components (each digital component includes 4 channels of signal acquisition ADC channels and 4 channels of signal generation DAC channels) and a common component.

[0022] Common components are mainly used to generate power supply, clock, high-precision slow clock, synchronous trigger signal, and control signal required by digital components. Among them, the high-precision public signal is used to complete precise trigger synchronization, which is a high-quality clock signal. The length of the transmission path from the signal to each digital component should be designed to be equal in length, that is, to ensure that the phases of the signal rec...

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Abstract

The invention provides a multi-channel synchronization method applied to a phased-array radar. The method comprises the steps of base band data synchronization and digital local oscillator synchronization, wherein the base band data synchronization comprises the steps that a trigger signal is received by FPGA to generate a distributing trigger signal, a sampling clock signal is used for collectingthe distributing trigger signal, a synchronous trigger signal is used for completing the collecting and generating of the signal, the digital local oscillator synchronization comprises the steps thata primary module generates an NCO synchronous trigger signal, after the rising edge of a public signal is collected by a reference clock signal, a trigger signal is generated, NCO is synchronously restored by the module to complete the synchronization of the NCO, and therefore the synchronization of a digital oscillator signal is completed. The method has the advantages that the signal generatingand sampling of a high-speed digital member and the synchronous control of digital variable frequencies are achieved to ensure the synchronous operation of a multi-channel digital system of the phased-array radar, multi-channel synchronization of antenna arrays of an active electronically scanned array and digital array radar is achieved, and the demands of beam pointing, efficient spatial powersynchronization and multi-channel transceiving synchronization of a radar system are met.

Description

technical field [0001] The invention relates to a synchronization method, which is mainly aimed at digital multi-channel systems with high sampling frequency, and can realize multi-channel synchronization of active phased array radar and digital array radar antenna front. Background technique [0002] Active phased array radar and digital array radar antenna arrays are composed of multiple TR channels. Generally, active phased array radar transmit and receive timing control and beam pointing control are executed and realized by TR components. The generation of the launch waveform and the AD conversion of the echo of the digital array radar are also realized by the digital TR component. Therefore, the problem of high-precision synchronization of multi-channel digital TR is introduced, including the synchronization between multi-channel digital waveform generators, the synchronization between multi-channel digital sampling and holding, and the synchronization between multi-cha...

Claims

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Application Information

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IPC IPC(8): G01S7/02
CPCG01S7/02
Inventor 季帅王敬东关炀王轶
Owner NO 20 RES INST OF CHINA ELECTRONICS TECH GRP
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