Effective measures against radio interference

Taking channel selection, metal shielding, use of capture filters, signal strength enhancers, spread spectrum technology, frequency hopping technology and many other measures can be effective against radio interference.

1, channel selection

If the frequency is the same, the effect of interference will be further aggravated, even if the interference is reduced by trying a different channel is useless. Therefore, choosing a channel with a lower air frequency, constraint or other noise is one way to ward off interference.

2, metal shielding

Masking with metal can reduce interference from radio signals, and can even shield RF signals in different frequency bands. These metal shields block interference from environmental factors and can prevent electromagnetic waves, electrostatic fields and reducing currents from entering the vehicle.

3. Use of capture filters

Capture filters are a common method of preventing interference. This filter is used to capture radio signals and authenticate their source through its components such as inductors and capacitors. It prevents the aircraft from being affected by external radio waves, thus allowing for more accurate control of the craft.

4, signal strength booster

Signal strength boosters are commonly used to defend against interference in the radio range. This device can solve receiver problems by amplifying weak signals.

5, spread spectrum technology

Spread spectrum technology applied to wireless communication systems, wireless communications outgoing and incoming signals can be dispersed into the noise to prevent electromagnetic interference. Direct sequence spread spectrum technology is a commonly used spread spectrum technology, the use of wireless communication signals hidden in the noise, it will be extended to the communication signal band to ensure that the signal power spectral density is reduced.

6, frequency hopping technology

Frequency hopping technology has a strong anti-jamming ability, is widely used in ultra-short wave communication equipment anti-jamming technology. Selected in accordance with a specific speed and the law of radio frequency hopping back and forth is the key to frequency hopping communication technology. Compared with the traditional stable and unchanging radio frequency technology, frequency hopping technology uses multi-frequency shift keying to select the code sequence, which can ensure that the carrier frequency continues to change, and then realize the spectrum expansion.

Radio interference hazards:

1, radio harmful interference, endangering the operation of radio navigation or other security services, or serious damage, impede or repeatedly blocked in accordance with the provisions of the normal conduct of radiocommunications business interference. This type of interference directly affects all aspects of social production and life, is the interference must be eliminated.

2, aviation radio navigation and positioning, train control and command and scheduling, distress on the water and other key areas of the industry's dedicated frequency encountered harmful interference, will lead to the inability to receive timely and useful signals and correct instructions.

3, broadcasting, communications, meteorology, electric power and other industry radio services encounter harmful interference, will seriously affect the industry's operational safety and economic and social development.

4, government, public security, emergency, military and other important radio services encounter harmful interference, will affect political security and national defense security, disturbing the social management order.

5, important meetings, sporting events and other major activities encountered harmful interference, will lead to scheduling, command, video broadcasting, timing and scoring system interruptions, jeopardizing the overall security of major events.