CN210745123U - Self-adaptive interference suppression equipment and system for very high frequency radio station - Google Patents

Abstract

The utility model discloses a self-adaptive interference suppression device and a system for a very high frequency radio station, wherein the self-adaptive interference suppression device for the very high frequency radio station comprises a power supply, a band-pass filter, an AD conversion unit, a preprocessing unit, a frequency conversion unit, a cancellation unit, a demodulation unit and a residue elimination unit; a system applying a very high frequency radio station self-adaptive interference suppression device comprises a receiving device, the very high frequency radio station self-adaptive interference suppression device and an audio conversion device; the system comprises a plurality of receiving devices, a switching device, the very high frequency radio station self-adaptive interference suppression device and an audio conversion device. The utility model discloses a processing is disturbed in digital self-adaptation, and prior art compares, and the interference suppression ability is stronger, promotes very high frequency radio station output voice SNR under complicated electromagnetic environment, promotes speech quality.

Description

Self-adaptive interference suppression equipment and system for very high frequency radio station

Technical Field

The utility model relates to a very high frequency ground-air communication technical field, concretely relates to very high frequency radio station self-adaptation interference suppression equipment and system.

Background

With the progress of communication technology, radio services are rapidly developing and widely applied to various industry fields, so that the electromagnetic environment is increasingly complex. At present, a very high frequency communication radio station is mainly adopted in a civil aviation ground-air communication mode at home and abroad, the modulation mode is amplitude modulation, and compared with an angle modulation mode, the anti-interference capability is insufficient. Therefore, the civil aviation airport is often interfered by electromagnetic waves of peripheral radio services in the communication process, such as signals adjacent to the aviation frequency band, and the probability that the communication of the aviation frequency band is influenced by intermodulation interference generated by the civil aviation airport is very high; some signal transmitters are crude in equipment, and stray radiation generated by the signal transmitters also seriously influences communication in an aviation frequency band; in addition, a great number of black broadcasts appearing in recent years occupy the aviation frequency band of civil aviation, and become important factors influencing the communication of the civil aviation VHF radio station. The interference causes the phenomena of distortion, interruption, submergence of interference signals and the like of communication signals between the ground control center and the pilot in the transmission process, the flight safety is seriously influenced, and the good development of civil aviation industry is hindered.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve the AM signal that current very high frequency radio station used and very easily receive the problem that frequency modulation phase modulation class signal interference leads to speech communication quality to worsen, provide a very high frequency radio station self-adaptation interference suppression equipment and system, promote the output voice SNR of very high frequency radio station under complicated electromagnetic environment, promote speech quality.

The utility model discloses a following technical scheme realizes:

the very high frequency radio station self-adaptive interference suppression device comprises a power supply, a band-pass filter, an AD conversion unit, a preprocessing unit, a frequency conversion unit, a cancellation unit, a demodulation unit and a residue cancellation unit, wherein the input end of the band-pass filter is connected with a medium-frequency signal of a civil aviation frequency band, the output end of the band-pass filter is connected with the AD conversion unit, the AD conversion unit is connected with the preprocessing unit, the preprocessing unit is connected with the frequency conversion unit, the frequency conversion unit is connected with the cancellation unit, the cancellation unit is connected with the demodulation unit, the demodulation unit is connected with the residue cancellation unit, and the output end; wherein:

the band-pass filter is used for performing band-pass filtering on the received intermediate frequency signals of the civil aviation frequency band, filtering out signals outside the very high frequency radio frequency band, and transmitting the signals to the AD conversion unit;

the AD conversion unit is used for converting the filtered analog signals into digital signals;

the preprocessing unit is used for calculating real-time parameters of communication signals of the very high frequency radio station and generating real-time carriers according to the real-time parameters;

the frequency conversion unit is used for multiplying the sine component and the cosine component of the real-time carrier with the communication signal of the very high frequency radio station respectively, performing low-pass filtering and outputting I, Q paths of signals;

the cancellation unit is used for carrying out phase shift on the Q path signal and subtracting the I path signal from the phase-shifted signal;

the demodulation unit is used for demodulating the signal processed by the cancellation unit and outputting the signal as a digital audio signal;

the residual eliminating unit is used for further suppressing the residual interference in the digital audio signal;

and the power supply is used for accessing an external power supply and supplying power to each unit of the self-adaptive interference suppression equipment of the VHF radio station.

The working principle is as follows: based on the AM signal that current very high frequency radio station used very easily receives frequency modulation phase modulation class signal interference and leads to the problem that speech communication quality worsens, the utility model discloses a digital self-adaptation interference suppression handles, at first becomes I, Q way signals with digital intermediate frequency signal through frequency conversion processing, then offsets interference signal through offsetting the unit, and interference suppression effect is showing and is improving, and prior art compares, interference suppression ability is stronger, promotes the output voice SNR of very high frequency radio station under complicated electromagnetic environment, promotes speech quality.

A system using a vhf radio adaptive interference suppression apparatus, comprising a receiving apparatus, said vhf radio adaptive interference suppression apparatus, and an audio converting apparatus, wherein:

the receiving equipment is used for receiving signals of civil aviation frequency bands;

the self-adaptive interference suppression equipment of the very high frequency radio station is used for carrying out interference suppression processing on the received signals, the suppressed interference signal types comprise frequency modulation and phase modulation interference signals suffered by civil aviation very high frequency radio station communication, and the signals subjected to the interference suppression processing are demodulated and subjected to residual interference suppression processing and then sent to the audio conversion equipment;

the audio conversion device is used for converting the digital audio signal into an analog audio signal.

Another system applying the self-adaptive interference suppression device of the very high frequency radio station comprises a plurality of receiving devices, a switching device, the self-adaptive interference suppression device of the very high frequency radio station and an audio conversion device, wherein:

the receiving equipment is used for receiving signals of civil aviation frequency bands;

the switching equipment is used for connecting a plurality of receiving equipment with the self-adaptive interference suppression equipment of the very high frequency radio station;

the self-adaptive interference suppression equipment for the very high frequency radio station is used for carrying out interference suppression processing on the received signals, the suppressed interference signal types comprise frequency modulation and phase modulation interference signals suffered by civil aviation very high frequency radio station communication, and the signals subjected to the interference suppression processing are demodulated and subjected to residual interference suppression processing and output as digital audio signals;

the audio conversion device is used for converting the digital audio signal into an analog audio signal.

Further, the receiving apparatus includes an antenna and a mixer.

Further, the audio conversion apparatus includes an audio conversion chip and a speaker.

Further, the very high frequency station adaptive interference suppression apparatus is disposed in a circuit of the system.

Compared with the prior art, the utility model, following advantage and beneficial effect have:

the utility model discloses very high frequency radio station self-adaptation interference suppression equipment and applied very high frequency radio station self-adaptation interference suppression equipment's system reduces the influence of interference through increasing interference suppression equipment, promotes the output speech signal to noise ratio of very high frequency radio station under complicated electromagnetic environment, promotes speech quality.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the system constructed in accordance with the present invention;

fig. 3 is a schematic view of another system constructed according to the present invention.

Reference numbers and corresponding part names in the drawings:

the device comprises a 1-band-pass filter, a 2-AD conversion unit, a 3-preprocessing unit, a 4-frequency conversion unit, a 5-cancellation unit, a 6-demodulation unit, a 7-residue cancellation unit and an 8-power supply.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.

Example 1

As shown in fig. 1, the self-adaptive interference suppression device for a vhf radio station includes apower supply 8, a band-pass filter 1, anAD conversion unit 2, a preprocessingunit 3, afrequency conversion unit 4, acancellation unit 5, ademodulation unit 6, and aresidue cancellation unit 7, wherein an input end of the band-pass filter 1 is connected to an intermediate frequency signal of a civil aviation frequency band, an output end of the band-pass filter is connected to theAD conversion unit 2, theAD conversion unit 2 is connected to the preprocessingunit 3, the preprocessingunit 3 is connected to thefrequency conversion unit 4, thefrequency conversion unit 4 is connected to thecancellation unit 5, thecancellation unit 5 is connected to thedemodulation unit 6, thedemodulation unit 6 is connected to theresidue cancellation unit 7, and an; wherein:

the band-pass filter 1 is used for performing band-pass filtering on the received intermediate frequency signals of the civil aviation frequency band, filtering out signals outside the frequency band of the very high frequency radio station, and transmitting the signals to theAD conversion unit 2;

theAD conversion unit 2 is configured to convert the filtered analog signal into a digital signal;

the preprocessingunit 3 is used for calculating real-time parameters of communication signals of the very high frequency radio station and generating real-time carriers according to the real-time parameters;

thefrequency conversion unit 4 is used for multiplying the sine component and the cosine component of the real-time carrier wave with the communication signal of the very high frequency radio station respectively, performing low-pass filtering and outputting I, Q paths of signals;

thecancellation unit 5 is configured to phase shift the Q-path signal, and subtract the phase-shifted signal from the I-path signal;

thedemodulation unit 6 is configured to demodulate the signal processed by thecancellation unit 5 and output the demodulated signal as a digital audio signal;

the residual eliminatingunit 7 is configured to perform further suppression processing on the residual interference in the digital audio signal;

and thepower supply 8 is used for being connected with anexternal power supply 8 and supplying power to each unit of the very high frequency radio station self-adaptive interference suppression equipment.

When in implementation: based on the problem that the quality of voice communication is deteriorated because AM signals used by the existing very high frequency radio station are very easily interfered by frequency modulation and phase modulation signals, the utility model discloses a digital self-adaptive interference suppression processing, firstly, the intermediate frequency analog signals enter a band-pass filter 1 for filtering processing, and the processing result is sent to anAD conversion unit 2 for analog-to-digital conversion; then, the digital signal obtained by conversion is sent to the preprocessingunit 3 for carrier estimation, the carrier estimation result is used for thefrequency conversion unit 4, and thefrequency conversion unit 4 converts the digital signal into I, Q two-path signals; then, the Q-path signal is phase-shifted in thecancellation unit 5, and the phase-shifted signal and the I-path signal are interference-cancelled, so as to obtain a signal subjected to adaptive interference suppression; finally, the signal after the interference suppression processing is demodulated and the residual interference suppression processing is carried out. Compared with the prior art, the interference suppression capability is stronger, the output voice signal-to-noise ratio of the very high frequency radio station under the complex electromagnetic environment is improved, and the conversation quality is improved.

A system using a vhf radio adaptive interference suppression apparatus, comprising a receiving apparatus, said vhf radio adaptive interference suppression apparatus, and an audio converting apparatus, wherein:

the receiving equipment is used for receiving signals of civil aviation frequency bands;

the self-adaptive interference suppression equipment of the very high frequency radio station is used for carrying out interference suppression processing on the received signals, the suppressed interference signal types comprise frequency modulation and phase modulation interference signals suffered by civil aviation very high frequency radio station communication, and the signals subjected to the interference suppression processing are demodulated and subjected to residual interference suppression processing and then sent to the audio conversion equipment;

the audio conversion device is used for converting the digital audio signal into an analog audio signal.

As shown in fig. 2, the receiving device sends the if signal to the vhf radio station adaptive interference suppression device, and the vhf radio station adaptive interference suppression device performs interference suppression on the if signal and sends out the processed voice, so that the output voice signal-to-noise ratio of the vhf radio station in a complex electromagnetic environment can be obviously improved, and the communication quality can be improved.

Example 2

As shown in fig. 3, the connection mode of the receiving device includes, but is not limited to, a one-to-one connection mode, and a many-to-one connection mode in which a plurality of receiving devices are connected to one adaptive interference suppression device may also be adopted; by adding the switching equipment, the function of simultaneously inhibiting interference of a plurality of radio stations is realized, the energy consumption can be effectively reduced, the installation and the setting are convenient, and the cost of the equipment can be reduced; interference suppressed outputs including, but not limited to, network cables, speakers, headphones, other wired or wireless transmission means are intended to be within the scope of this patent. Furthermore, the utility model discloses the form of being connected with very high frequency radio station includes but not limited to the form of independent peripheral hardware, also can imbed in the radio station or integrate to the radio station in the circuit originally in the form of independent integrated circuit board.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (6)

1. The very high frequency radio station self-adaptive interference suppression device is characterized by comprising a power supply, a band-pass filter, an AD conversion unit, a preprocessing unit, a frequency conversion unit, a cancellation unit, a demodulation unit and a residue cancellation unit, wherein the input end of the band-pass filter is connected with a medium-frequency signal of a civil aviation frequency band, the output end of the band-pass filter is connected with the AD conversion unit, the AD conversion unit is connected with the preprocessing unit, the preprocessing unit is connected with the frequency conversion unit, the frequency conversion unit is connected with the cancellation unit, the cancellation unit is connected with the demodulation unit, the demodulation unit is connected with the residue cancellation unit, and the output end of; wherein:

the band-pass filter is used for performing band-pass filtering on the received intermediate frequency signals of the civil aviation frequency band, filtering out signals outside the very high frequency radio frequency band, and transmitting the signals to the AD conversion unit;

the AD conversion unit is used for converting the filtered analog signals into digital signals;

the preprocessing unit is used for calculating real-time parameters of communication signals of the very high frequency radio station and generating real-time carriers according to the real-time parameters;

the frequency conversion unit is used for multiplying the sine component and the cosine component of the real-time carrier with the communication signal of the very high frequency radio station respectively, performing low-pass filtering and outputting I, Q paths of signals;

the cancellation unit is used for carrying out phase shift on the Q path signal and subtracting the I path signal from the phase-shifted signal;

the demodulation unit is used for demodulating the signal processed by the cancellation unit and outputting the signal as a digital audio signal;

the residual eliminating unit is used for further suppressing the residual interference in the digital audio signal;

and the power supply is used for accessing an external power supply and supplying power to each unit of the self-adaptive interference suppression equipment of the VHF radio station.

2. System of vhf radio adaptive interference suppression apparatus according to claim 1, comprising a receiving apparatus, the vhf radio adaptive interference suppression apparatus of claim 1, an audio conversion apparatus, wherein:

the receiving equipment is used for receiving signals of civil aviation frequency bands;

the self-adaptive interference suppression equipment of the very high frequency radio station is used for carrying out interference suppression processing on the received signals, the suppressed interference signal types comprise frequency modulation and phase modulation interference signals suffered by civil aviation very high frequency radio station communication, and the signals subjected to the interference suppression processing are demodulated and subjected to residual interference suppression processing and then sent to the audio conversion equipment;

the audio conversion device is used for converting the digital audio signal into an analog audio signal.

3. System of vhf radio adaptive interference suppression apparatus according to claim 1, comprising a plurality of receiving apparatuses, a switching apparatus, the vhf radio adaptive interference suppression apparatus according to claim 1, an audio conversion apparatus, wherein:

the receiving equipment is used for receiving signals of civil aviation frequency bands;

the switching device for connecting a plurality of receiving devices with the vhf station adaptive interference suppression device of claim 1;

the self-adaptive interference suppression equipment for the very high frequency radio station is used for carrying out interference suppression processing on the received signals, the suppressed interference signal types comprise frequency modulation and phase modulation interference signals suffered by civil aviation very high frequency radio station communication, and the signals subjected to the interference suppression processing are demodulated and subjected to residual interference suppression processing and output as digital audio signals;

the audio conversion device is used for converting the digital audio signal into an analog audio signal.

4. A system of very high frequency station adaptive interference suppression devices according to claim 2 or 3, characterized in that said receiving device comprises an antenna and a mixer.

5. A system of very high frequency station adaptive interference suppression apparatus according to claim 2 or 3, characterized in that said audio conversion apparatus comprises an audio conversion chip and a loudspeaker.

6. A system of very high frequency station adaptive interference suppression devices according to claim 2 or 3, characterized in that said very high frequency station adaptive interference suppression devices are arranged in the circuitry of said system.

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