Device and method for pulse system radar to insert synchronization signal between transmission pulses

Abstract

This application discloses a device for inserting synchronous signals between pulses of a pulse system radar. The device includes: a main control module, a trigger pulse repetition frequency PRF module, a mode control command module, a synchronous PRF module, a signal generation module, and an antenna switch Module, the first antenna and the second antenna; the synchronous PRF sent by the synchronous PRF module controls the antenna switching module to select the first antenna or the second antenna, and when the first antenna receives the trigger PRF at the first level by the sending signal generating module The first signal is sent, and the second antenna is used to send the second signal when the sending signal generating module receives the synchronous PRF at the first level, thereby realizing the technical effect of inserting the synchronous signal between the transmitting pulses. The application also discloses a method for inserting synchronous signals between pulses of the pulse system radar.

Description

technical field [0001] The invention relates to the technical field of space-borne synthetic aperture radar signal generation, in particular to a device and method for pulse system radar to insert synchronization signals between pulses. Background technique [0002] With the rapid development of spaceborne Synthetic Aperture Radar (SAR) systems, high resolution, multi-band, multi-polarization, multi-mode and interference have become the main directions for countries to concentrate their efforts to overcome difficulties. Among them, interference is the A hot area. [0003] The conventional spaceborne SAR system is a single-satellite single-antenna pulse system radar. According to a certain pulse repetition frequency (Pulse Repeating Frequency, PRF), it transmits a chirp signal with a certain pulse width and bandwidth, receives and records the echo data, and downloads it to the ground. Signal processing and imaging are performed on the ground. The disadvantage of the convent...

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Problems solved by technology

[0008] Although the first device for generating pulse synchronization signals saves hardware costs, its main technical defects include: the system’s normal pulse chirp signal transmission is interrupted, which will affect the continuity of the SAR system’s ground imaging; in order to ensure that the SAR system has sufficient A number of normal pulse signals are sent to the ground, and the number of pulse synchronization signals that can be inserted during the working hours of the system is limited, which cannot make the phase synchronization between the two stars reach a higher level

[0009] Although the second device for generating pulse synchronization signals can flexibly insert pulse synchronization signals between the transmission pulses of uninterrupted pulse chirp signals, its main technical defects include: the complexity of the system hardware increases, and a new pulse synchronization signal is added. The synchronous signal generation device needs to add circuit boards, devices, boxes, hardware interfaces, cables and corresponding environmental tests, and the cost will increase accordingly; the complexity of the system control software will increase, and it is necessary to add new components for the pulse synchronous signal generation device. Mode Control Script and Timing Control

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