Distributed frequency spectrum monitoring method

Abstract

The invention provides a distributed frequency spectrum monitoring system. The distributed frequency spectrum monitoring system comprises a monitoring control center used for sending a monitoring taskA, and a plurality of monitoring receivers for collecting and transmitting back frequency spectrum data; a monitoring processor is connected between the monitoring control center and the monitoring receivers; the monitoring processor comprises a cooperative scheme formulation module and a data analysis processing module; the cooperative scheme formulation module formulates a scheduling monitoringscheme B and a monitoring command C according to a demand of the monitoring task A, and performs selection, grouping, labeling and synchronization according to the scheduling monitoring scheme B; each of the monitoring receivers collects frequency spectrum data according to the monitoring command C; and the data analysis processing module receives and analyzes the frequency spectrum data transmitted back by each of the monitoring receivers, and transmits analyzed signal data back to the monitoring control center. The invention further provides a frequency spectrum monitoring method based on the system. The frequency spectrum monitoring method provided by the invention simultaneously has good scanning period, spectral resolution and receiving sensitivity.

Description

technical field [0001] The invention relates to a spectrum monitoring method, in particular to a distributed spectrum monitoring method. Background technique [0002] Wireless spectrum is a kind of non-renewable natural resource and the basic support of wireless communication. The total amount is limited, and it also determines the development of the entire communication industry. The use of wireless spectrum is affected by many factors such as the propagation environment and the interference between communication devices, which makes the real practical spectrum less and less. [0003] Spectrum monitoring refers to the general term for activities such as detecting, searching, and intercepting the electromagnetic environment and electromagnetic spectrum signals in the monitoring area, and analyzing, identifying, monitoring, and counting electromagnetic spectrum parameters and working characteristics of radio signals. Monitoring mainly includes signal detection, search and in...

AI Technical Summary

Problems solved by technology

[0010] (2) The signal frequency search range is very wide (usually above GHz) in a complex electromagnetic background, but there is a certain contradiction between the wider frequency search range and high frequency resolution (low RBW) and search cycle

Within a certain frequency search range, if the number of FFT points is fixed, increasing the monitoring bandwidth can shorten the search period, but it will reduce the frequency resolution (the RBW analysis bandwidth increases), so it is difficult to coordinate the search period and frequency resolution contradictory relationship

[0011] (3) For the monitoring of the frequency band with large fluctuations in the noise level at the bottom of the channel and the monitoring of weak signals, the search effect is relatively poor

Either way, if the receiving sensitivity of the monitoring receiver is not high enough, it will obviously affect the reception and judgment of weaker signals

[0012] In short, it is impossible for existing monitoring methods to simultaneously have a shorter scanning period, higher spectral resolution, and better receiving sensitivity, that is, it is difficult to detect instantaneous signals / burst signals / narrow-band dense signals / weak signals at the same time. carry out effective monitoring

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