Device and method for emission pulse interleave synchronous signal of pulse system radar

Abstract

The invention discloses a device for an emission pulse interleave synchronous signal of a pulse system radar. The device comprises a master control module, a trigger pulse repeated frequency (PRF) module, a mode control instruction module, a synchronous PRF module, a signal generation module, an antenna switching module, a first antenna and a second antenna. The first antenna or the second antennais grated through controlling the antenna switching module by synchronous PRF sent from the synchronous PRF module, a first signal is sent by the first antenna when trigger PRF received by the signalgeneration module is a first level, a second signal is sent by the second antenna when synchronous PRF received by the signal generation module is the first level, and the technical effect of the emission pulse interleave synchronous signal is achieved. The invention also discloses a method for the emission pulse interleave synchronous signal 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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