Spectrum Acquisition Method of Space Electromagnetic Signal Based on Variable Sampling Rate

Abstract

The invention discloses a space electromagnetic signal spectrum obtaining method based on variable sampling rate and mainly solves the problem that the operating speed is slow in the prior art, and thus electronic equipment cannot work normally. The method comprises the following steps: 1) setting the quantity and parameters of radar transmitters and communication transmitters; 2) calculating sampling frequency and sampling number of transmitting signals of the radar transmitters and the communication transmitters; 3) calculating transmitting signal amplitude of each radar transmitter and the communication transmitter at each observation point; 4) calculating transmitting signal spectrum of each radar transmitter and the communication transmitter at each observation point according to the transmitting signal amplitude; 5) calculating transmitting signal superposition spectrum of each radar transmitter and the communication transmitter at each observation point according to the transmitting signal spectrum; and 6) repeating the steps 3)-5) for the whole observation region and obtaining the space electromagnetic signal spectrum. The method reduces calculation amount greatly, improves reaction speed of electronic equipment and can be used for preventing mutual interference of the electronic equipment.

Description

technical field [0001] The invention belongs to the technical field of space electromagnetic situational awareness, and in particular relates to a method for acquiring a space electromagnetic signal spectrum. It can be used to analyze the electromagnetic environment and avoid mutual interference of various electromagnetic devices. Background technique [0002] With the development of informatization, there are more and more electromagnetic devices in the real environment, resulting in an extremely complex electromagnetic environment. How to obtain the spectrum of space electromagnetic signals is of great value to the study of the electromagnetic environment: first, it helps to avoid the interaction between electromagnetic devices. The second is that it can guide the aircraft to avoid electromagnetic interference in the desired equipment, so that it can take off and land safely. [0003] In the study of this problem, the traditional method of obtaining the spectrum of space ...

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Problems solved by technology

Xidian University disclosed a method for obtaining the spectrum of space electromagnetic signals in its patent application "Method for Obtaining Space Electromagnetic Intensity Data" (patent application number 201410103112.x), which requires a full sampling of each transmitted signal , which increases the burden of the system to a great extent, and at the same time, due to the difference in signal center frequency, when superimposing the transformed signals, the amount of calculation is increased, which will cause errors in the acquisition of the space electromagnetic signal spectrum, which will cause electronic equipment to fail to work normally. Work

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