A digital array module reception delay testing method and device

Abstract

The invention discloses a method and device for testing the receiving delay of a digital array module. The method includes the steps of: establishing a state control module; the state control module controls the working state of the digital array module, and makes its output channel work with the digital array module The pulse signal of state synchronization, with the synchronization signal as a link, establishes a synchronization relationship between the digital array module and the excitation signal required for the test of the receiving channel; the time stamp information generated by the corresponding synchronization signal is packaged in the receiving channel I / Q In the data packet, the state control module is used to extract the initial time stamp information, and the correlation operation is performed according to the corresponding relationship between the initial time stamp and the I / Q data receiving time, and the receiving delay test result is obtained. The invention converts the receiving delay test into the calculation of the absolute time difference between signals, without complex digital signal processing, only needs to obtain the received I / Q data time and analyze the initial time stamp information, that is, receive Latency test results.

Description

technical field [0001] The invention relates to a method for testing the receiving delay of a digital array module and a device for testing the receiving delay of the digital array module. Background technique [0002] Digital array radar is a fully digital phased array radar that adopts digital beamforming technology for both transmission and reception. Compared with traditional phased array radar, digital array radar has its incomparable advantages, such as large dynamic range, easy realization of multi-beam, low loss, low sidelobe, low angle measurement with high precision, strong manufacturability, and reliable system tasks High sex. Therefore, the application prospect of digital array radar is very broad. The digital array module is the most important and most numerous basic unit of the digital array radar. The digital array module is a microwave-digital mixed multi-channel radar transmitting / receiving module. It is a synthesis of analog T / R components, phase shifter...

AI Technical Summary

Problems solved by technology

Because most of the test instruments currently test the analog signals, it is difficult to directly test and analyze the I / Q data. Even if there are test and analysis functions, there is still a difficult problem to be solved between the test instrument and the digital array module. ;

[0006] 2) The control of the working state of the digital array module is no longer realized by transmitting digital signals and trigger signals through twisted pairs, but by transmitting more and more complex state data and commands through optical fibers, and the digital array module itself has no synchronization signal input Output

Then, the method of using an arbitrary waveform generator to construct a synchronization system between the DUT and the test instrument is no longer applicable; in addition, the output signal of the receiving channel of the digital array module is multi-channel I / Q data transmitted by optical fiber, not an analog RF signal , a digital oscilloscope cannot test it

Therefore, whether it is from the perspective of synchronization or from the perspective of equipment, the previous scheme of using arbitrary waveform generator + digital oscilloscope cannot realize the test of the receiving delay of the digital array module at all.

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