A Cognitive Method and System for Satellite Energy Detection Based on Radio Environment Map

Abstract

The invention provides a satellite energy detection cognition method and system based on a radio environment map. The method comprises the following steps that 1, interference caused on a fixed satellite service (FSS) link by a fixed server (FS) link in a satellite-land communication scene is analyzed; 2, according to a spectrum energy detection method, cognition equipment obtains distribution ofdecision counting values of received interference signal energy, and by means of the probability that the decision counting values are larger than a predetermined threshold value, interference information of the cognition equipment is obtained; 3, a geodetic coordinate system of the cognition equipment is converted into a preset navigation coordinate system in an interference area with the GPS cognition equipment to obtain location information (x, y) of the cognition equipment; and 4, the cognition equipment transmits the interference information and the location information to a data center through a control channel not interfered, and the radio environment map is precisely drawn. According to the method and system, idle spectrum resources in the space domain, the frequency domain and thetime domain are reutilized, and the utilization rate of the existing scant radio spectrum resources is increased.

Description

technical field [0001] The invention relates to a method and system for satellite energy detection and cognition based on a radio environment map, which allows satellite links to develop unused spectrum resources for ground links in a more efficient manner, and addresses the challenge of spectrum shortage in satellite wireless communication systems. Background technique [0002] With the development of wireless communication technology, the number of wireless users increases rapidly, the demand for spectrum increases rapidly, and the problem of spectrum scarcity becomes increasingly prominent. At the same time, a large number of measurement results show that the utilization rate of the allocated frequency bands is not high. It can be seen that spectrum scarcity is not a lack of spectrum resources themselves. Therefore, how to use radio spectrum resources more efficiently is an important problem that needs to be solved urgently. Cognitive radio technology is recognized as a t...

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Problems solved by technology

[0007] (4) The current radio environment map lacks the real-time spectrum sensing function under multiple combinations of frequency, geography and time, so the efficiency of spectrum allocation and sharing is not high, and the automatic spectrum management function cannot be realized, which reduces the efficiency of the overall cognitive system

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