A VHF/UHF air-to-air over-the-horizon communication device based on enabling communication technology
A communication technology and communication device technology, which is applied in the field of VHF/UHF air-to-air over-the-horizon communication devices, can solve the problems of ground-air communication quality degradation, channel transmission loss increase, and received signal fading, and achieve improved distance and time-varying fading Inhibition, the effect of reliable communication
Active Publication Date: 2018-06-12
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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Problems solved by technology
[0002] The existing VHF / UHF ground-to-air communication equipment adopts the line-of-sight communication method. When the air platform and the ground station exceed the line-of-sight limit distance, the channel transmission loss will increase sharply, and there will be significant fading of the received signal, resulting in ground-to-air communication. Severe drop in quality or even complete interruption
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[0017] Hereinafter, the present invention will be further described in detail with reference to the accompanying drawings, taking 4 pairs of transmitting and receiving antennas and 600 bps voice codec as an example.
[0018] The present invention includes a voice terminal 1, a modulator 2, first to fourth radio frequency units 3-1 to 3-4, first to fourth four-unit logarithmic periodic patchwork antennas 4-1 to 4-4, and a demodulator 5. figure 1 Is a block diagram of the electrical principle of the present invention, Figure 4 Is the electrical principle block diagram of the embodiment of the present invention; Figure 4 Connect the line. Among them, the role of the voice terminal 1 is to perform analog / digital conversion or digital / analog conversion on the input signal, and to generate a control signal for receiving and transmitting switching; the role of the modulator 2 is to perform voice encoding and modulation processing on the received digital voice signal; The first to four...
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The invention discloses a VHF / UHF air-to-air over-the-horizon communication device based on enabling communication technology, and relates to asymmetric diversity, dynamic Doppler frequency shift correction, low-speed voice codec, and four-unit logarithmic communication in the field of ground-air communication. Some communication devices such as periodic mosaic antennas. It is composed of voice terminal, modulator, demodulator, radio frequency unit, four-unit logarithmic period array antenna and other components. It adopts the combination of ground-air asymmetric diversity, dynamic Doppler frequency shift correction and low-speed voice codec, which effectively eliminates the influence of channel time-varying fading and dynamic Doppler frequency shift in ground-air over-the-horizon transmission, and realizes The ground-air over-the-horizon reliable communication between the ground station and the air platform is realized. It has the advantages of strong anti-channel fading ability, outstanding performance in suppressing dynamic Doppler frequency shift, high equipment reliability, and flexible use. It is especially suitable for high-reliability and flexible transmission between ground stations and air platforms under the condition of over-the-horizon. communication device.
Description
Technical field [0001] The invention relates to the field of ground-to-air communication, and is particularly suitable for a VHF / UHF air-to-air over-the-horizon communication device based on an enabling communication technology that realizes highly reliable and flexible transmission under conditions of over-the-horizon of ground stations and aerial platforms. Background technique [0002] Existing VHF / UHF ground-to-air communication equipment adopts line-of-sight communication. After the aerial platform and the ground station exceed the line-of-sight limit, the channel transmission loss will increase sharply, and the received signal will have significant fading, resulting in ground-to-air communication The quality is severely reduced or even completely interrupted. Summary of the invention [0003] The purpose of the present invention is to avoid the shortcomings of a sharp increase in channel transmission loss and a significant fading of the received signal caused by a drop in co...
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IPC IPC(8): H04B7/005
CPCH04B7/005
Inventor 刘莹郝清涛唐秋菊
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP