Multi-pulse star signal simulator

Abstract

The invention discloses a multi-pulse star signal simulator comprising a numerical value simulation unit, a first frequency integration unit, a laser modulation unit, a laser emission unit, a detectorunit, a second frequency integration unit and a photon counting logical unit, wherein the numerical value simulation unit generates radiation signal data of a plurality of pulse stars by using a clock of the first frequency integration unit according to a signal numerical value model and sends the radiation signal data to the laser modulation unit; the laser modulation unit generates a current signal which can directly modulate a laser according to the clock of the first frequency integration unit; the laser emission unit converts the current signal of a laser modulator into a laser intensitysignal; the detector unit receives the laser signal, generates pulses and sends the pulses into the photon counting logical unit; and the photon counting logical unit counts the pulses according to aclock of the second frequency integration unit and sends a counting result to an upper computer. The invention has the advantages of high data reliability and coincidence of a signal generation and detection mechanism with the actual condition and is used for providing simulated data to the independent celestial navigation simulation of a spacecraft.

Description

technical field [0001] The invention belongs to the technical field of signal and information processing, and in particular relates to an X-ray pulsar signal simulator, which is used for providing simulated data for spacecraft autonomous celestial navigation simulation. Background technique [0002] A pulsar is a neutron star with high-speed and stable spin. Since its magnetic pole axis does not coincide with the rotation axis, when the cone-shaped radiation beam radiated by the magnetic pole axis sweeps across the detector, the detector can receive a series of arrival time stability Extremely high radiation pulses. The astronomical navigation method using the arrival time measurement of these radiation pulses of pulsars as information input can provide rich navigation information such as position, velocity, time, attitude, etc. for near-Earth, deep space and interstellar space spacecraft. This pulsar-based navigation technology was first proposed by Dr. Durns of the Jet Pr...

AI Technical Summary

Problems solved by technology

However, the flux of pulsars is very low, and due to the occlusion of the earth's atmosphere, it is difficult for X-rays to pass through the dense atmosphere of the earth, and it is impossible to obtain pulsar X-ray radiation signals in the ground atmosphere environment; current research on X-ray pulsars uses software simulation The data does not consider the particularity of the X-ray pulsar signal radiation and receiving process, and the reliability of the data is low; the use of space X-ray pulsar detectors to obtain data requires special satellites, which are expensive and involve extensive and complex technologies, which cannot meet the requirements of large-scale The needs of most research institutions and researchers

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