CN115276774B

CN115276774B - Multi-channel voice communication method

Info

Publication number: CN115276774B
Application number: CN202210933267.0A
Authority: CN
Inventors: 叶勉; 张学军; 付元华; 黎涵予
Original assignee: Xihua University
Current assignee: Xihua University
Priority date: 2022-08-04
Filing date: 2022-08-04
Publication date: 2023-09-15
Anticipated expiration: 2042-08-04
Also published as: CN115276774A

Abstract

The invention provides a multichannel voice communication method, first aircraft communicates with ground directly, call is unsuccessful and repeat the call, if exceed the preset value of the repetition number, turn to VHF1 non-emergency and establish communication with satellite, if communicate succeed, the conversation ends, if VHF1 channel is occupied and cause communication failure, should queue up, the satellite will transmit the received signal according to the order of receiving time; if the aircraft fails to establish communication by using the VHF1 for multiple times, that is, exceeds the preset waiting time, communication is established with the satellite through the VHF3 emergency communication frequency band, and when the VHF3 channel is occupied, the VHF3 is still used for establishing communication continuously. The invention provides a communication strategy for reducing multipath signal interference, which uses different frequencies sent by different VHF antennas to judge the emergency degree of different signals according to the characteristics of the frequencies under the condition of not changing the original airborne VHF transceiver station of an airplane.

Description

Multi-channel voice communication method

Technical Field

The invention belongs to the technical field of communication, and particularly relates to a multichannel voice communication method.

Background

In the actual communication process of an airplane and a satellite, a plurality of machines simultaneously establish voice communication with the satellite to cause mutual interference of signals.

Multichannel communication can be achieved by means of time division multiple access and code division multiple access techniques, but both techniques are only used for digital signals, and for analog signals, the need to convert analog signals into digital signals arises, and analog-to-digital converters are bulky and costly. The use of a multi-channel voice communication strategy can achieve the effects of time division multiple access and code division multiple access techniques without analog to digital conversion.

Disclosure of Invention

Aiming at the technical problems, the invention provides a communication strategy for reducing multipath signal interference, which uses different frequencies sent by different VHF antennas to judge the emergency degree of different signals according to the characteristics of the frequencies under the condition of not changing the original onboard VHF transceiver station of an airplane, and achieves the effect of multiple access communication technology on digital signals.

The specific technical scheme is as follows:

a multi-channel voice communication method comprising the steps of:

firstly, the aircraft directly communicates with the ground, if the call is unsuccessful, the call is repeated, if the preset value of the repetition times is exceeded, the communication is established between the VHF1 non-emergency situation and the satellite, if the communication is successful, the session is ended, if the VHF1 channel is occupied to cause communication failure, the communication should be queued, and the satellite can forward the received signals according to the receiving time sequence.

If the aircraft fails to establish communication with the VHF1 for multiple times (exceeding the preset waiting time), communication is established with the satellite through the VHF3 emergency communication frequency band, and when the VHF3 channel is occupied, the VHF3 is still used for establishing communication continuously.

If the satellite receives the signals of the VHF1 and VHF3 communication frequency bands at the same time, the satellite preferentially forwards the signals of the VHF3 frequency band.

Further, the signal frequency of the airplane sent by the VHF1 antenna and the VHF3 antenna is fixed, the satellite obtains the original signal frequency after amplifying and frequency converting, according to the matching algorithm of the multi-channel voice communication strategy, if a plurality of signals are received at intervals, the signals are forwarded according to time sequence, if the signals are received simultaneously, the emergency degree of the signals is judged according to the original signal frequency, the emergency degree is forwarded with high priority, if the signals of the VHF3 are communicated with the satellite, the satellite is communicated with another VHF1 signal, the communication is disconnected, and the communication with the VHF3 is established.

Drawings

FIG. 1 is a block diagram of a multi-channel voice communication policy system of the present invention;

fig. 2 is a flow chart of a multi-channel voice communication strategy of the present invention.

Detailed Description

The specific technical scheme of the invention is described by combining the embodiments.

As shown in fig. 1 and fig. 2, it is assumed that two aircraft in the area a transmit signals to the satellite at the same time, one of the two aircraft fails seriously and cannot continue to fly, and needs to find an open area to make an emergency forced landing, the other aircraft fails little and can continue to fly, the aircraft with serious failure uses the VHF3 frequency band, the aircraft with small failure uses the VHF1 frequency band, and the satellite will forward the communication signals of the VHF3 first. The multichannel voice communication strategy sorts the priorities of the signals received by the satellites according to the sequence of the received signals and the different emergency degrees, and gives the information with high priority to allocate idle communication channels so as to reduce multipath signal interference and improve communication quality.

Claims

1. A method of multi-channel voice communication, comprising the steps of:

firstly, the aircraft directly communicates with the ground, if the call is unsuccessful, the call is repeated, if the preset value of the repeated times is exceeded, the aircraft turns to VHF1 non-emergency condition to establish communication with the satellite;

if the communication is successful, the session is ended, if the VHF1 channel is occupied, the communication is failed, queuing is carried out, and the satellite forwards the received signals according to the receiving time sequence;

if the aircraft fails to establish communication by using the VHF1 for multiple times, namely exceeds the preset waiting time, establishing communication with the satellite through the VHF3 emergency communication frequency band, and continuing to establish communication by using the VHF3 when the VHF3 channel is occupied;

2. The multi-channel voice communication method according to claim 1, wherein the frequency of signals transmitted by the aircraft through the VHF1 antenna and the VHF3 antenna is fixed, the satellite obtains the original frequency of signals after amplifying and frequency-converting, the signals are forwarded in time sequence according to a matching algorithm of the multi-channel voice communication strategy if a plurality of signals are received at intervals, the emergency degree of the signals is judged according to the original frequency of the signals if the signals are received simultaneously, the emergency degree is high, and if the signals of the VHF3 are communicated with the satellite, the satellite is disconnected from the communication when the signals of the VHF3 are communicated with another VHF1 signal, and the communication with the VHF3 is established.