Electromagnetic spectrum management in complex electromagnetic environments

Firstly, detect the presence or absence of the signal in the monitoring band and the number of dry potatoes, identify the modulation mode of the signal in the case of the letter stool holding number, and estimate the carrier frequency, bandwidth, baud rate and other parameters of the signal. At present, the electromagnetic spectrum monitoring system for electromagnetic sensor network application mainly relies on a plurality of small sensor nodes that can be arbitrarily arranged to complete the electromagnetic signal monitoring in a certain area in a collaborative mode, and its monitoring node is small in size, and the energy is limited, and thus its processing capacity is also limited, and this puts forward the higher requirement for the processing method of electromagnetic spectrum monitoring, that is, the processing algorithm must be simple, fast, and the storage and processing capacity required are relatively small, etc.

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Electromagnetic spectrum monitoring refers to the monitoring and census of radio signals in space, it mainly includes three main links of signal detection, modulation mode identification and parameter estimation, that is, firstly detect the presence and quantity of signals in the monitoring frequency band, close the modulation mode of the signal in the presence of signals, and estimate the carrier frequency, bandwidth, baud rate and other parameters of the signal.

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The complex electromagnetic environment mainly refers to the sum of man-made electromagnetic emission and various electromagnetic phenomena in a certain combat time and space. The main factors constituting the complex electromagnetic environment are the electronic confrontation between the enemy and China, the high-density, high-intensity, and multi-spectrum electromagnetic waves released by various high-quality equipment, the radiation of civilian electromagnetic equipment, and the electromagnetic waves generated by nature.

Most of the information wars started with electromagnetic fields. The implementation of electronic jamming in a wide frequency range, in a variety of forms, and at multiple levels is the basic means of seizing the right to control the electromagnetic system.

Spectrum is a finite, non-renewable strategic resource. As a public resource of the country, most of the spectrum is shared by the military and civilians, except for a part allocated to the military, so all countries attach great importance to cherishing and making full use of it. In the military field, the future battlefield will be characterized by a large number of equipment, a complete range of types, a large density of radio stations, complex programs, and a fast pace of changes in the electromagnetic environment; if spectrum management is not strengthened, it will inevitably cause problems such as communication interference and poor communication, thus affecting the success or failure of the entire war situation.

According to foreign publications, during the Gulf War, there were more than 7,500 high-frequency networks, more than 1,200 very high frequency networks, and 7,000 ultra-high frequency networks for radio frequency management. All these have shown from different aspects that without an orderly management of the electromagnetic spectrum as the foundation, informationized operations will be greatly restricted and affected. Therefore, it is necessary to have a sober understanding of the management of the electromagnetic spectrum, actively follow the development frontier of spectrum management in the world's military field, conduct in-depth research, and constantly strengthen supervision and control.

The focus is to strengthen the establishment of a mechanism for the joint management, joint construction, and sharing of the military-civilian electromagnetic spectrum, build a platform for resource sharing, do a good job in the coordination of the three services, vigorously promote the process of sharing military and civilian resources, and change from single technical support to multi-dimensional and all-round management.

Some of the world's military powers generally believe that the electromagnetic spectrum is the only important thing that can support mobile, dispersed and high-intensity operations. Foreign military commented: "The spectrum is an intangible combat power, and it is a new type of combat power that can be compared with firepower, mechanical power.

even predicted: "The 21st century will be the era of spectrum warfare"; "In wartime, frequency resources are as important as ammunition and oil, and they are the necessary material base for warfare. "Therefore, we must attach great importance to strengthening the construction of information technology, strengthening the management of spectrum, and linking the overall improvement of combat effectiveness and winning future information wars.

The electromagnetic spectrum – an invisible world full of magic. With the rapid development of the military's informationization construction, it has become an important weight that will affect the outcome of a war on the battlefield in the future.

Electromagnetic spectrum management is the foundation of radio communication, the key to the maximum efficiency of electronic systems, and an important guarantee for the smooth flow of information. Today's world, is the era of information technology, electromagnetic spectrum management is the information superhighway on the "traffic police", with the spectrum in various fields of wide application, spectrum management has attracted more and more attention from all countries. He is changing from a traditional "supporting role" in support to a "leading role" in modern information-based warfare, and has made great strides from the backstage of the war arena to the foreground.

The electromagnetic spectrum refers to the electromagnetic wave family that is continuously arranged according to the wavelength (or frequency) of the magnetic waves. In the military, the electromagnetic spectrum is not only a carrier for transmitting information, but also an important means of reconnoitring the enemy's situation, so it has become one of the commanding heights for the warring parties.