JPH10163944A - Remote air radio equipment and remote air radio system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a remote air radio equipment capable of improving voice quality listened to in an aircraft control center and an aircraft even in the case of using a ground channel and a communication satellite channel as a communication route from the aircraft control center. SOLUTION: The voice delay circuit 13 of this remote air radio equipment 1 delays voice output signals from the aircraft received in a receiver 10 and outputs them to the aircraft control center and the voice delay circuit 14 delays voice input signals to be transmitted to the aircraft and outputs them to a transmitter 11. A press signal delay circuit 15 delays transmission press signals from the aircraft control center, informs the transmitter 11 of them and thus, activates the transmission operation. A delay time control circuit 16 sets the delay time respectively instructed by control signals from the aircraft control center to the voice delay circuits 13 and 14 and the press signal delay circuit 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote air-to-air radio apparatus and a remote air-to-air radio system, and more particularly to a system using an offset carrier type remote air-to-air radio apparatus.

[0002]

2. Description of the Related Art Conventionally, a remote air-to-air radio apparatus includes a receiver 21, a transmitter 22, a switch 23, and an antenna 24, as shown in FIG. The receiver 21 outputs a received voice output from an aircraft (not shown) to an air traffic control center (not shown).

[0003] A transmitter 22 converts an audio signal transmitted from an air traffic control center to an AM (Amplitude Module).
modulation) and transmits to the aircraft. The switch 23 connects one of the receiver 21 and the transmitter 22 to the antenna 24. The antenna 24 transmits and receives radio waves to and from the aircraft.

When a transmission press signal from a control center is superimposed on a transmission voice signal as a PTT (push to talk) tone signal, the remote air-to-air radio device includes a receiver 31 and a receiver 31 as shown in FIG. A transmitter 32;
A switch 33, an antenna 34, a PTT tone detection circuit 35, and a PTT tone removal circuit 36 are provided.

[0005] The receiver 31 outputs a received voice output from the aircraft to an air traffic control center. The transmitter 32 AM-modulates the transmission voice signal transmitted from the air traffic control center and transmits the signal to the aircraft. The switch 33 connects one of the receiver 31 and the transmitter 32 to the antenna 34. Antenna 34
Transmits and receives radio waves to and from aircraft.

The PTT tone detection circuit 35 detects a PTT tone signal from the transmission voice signal transmitted from the air traffic control center, and when detecting the PTT tone signal, notifies the transmitter 32 of a transmission press signal to start the transmission operation. I do.
The PTT tone removing circuit 36 removes the PTT tone signal from the transmission voice signal transmitted from the air traffic control center and outputs the signal to the transmitter 11. In this case, the transmitter 32 transmits the transmission voice signal from which the PTT tone signal has been removed by the PTT tone removal circuit 36.

[0007]

In the above-mentioned conventional remote air-to-air radio apparatus, the transmission voice signal from the air traffic control center is transmitted to the aircraft as it is and received from the aircraft regardless of the communication route from the air traffic control center. Since the received voice signal is output to the air traffic control center as it is, if a ground line and a communication satellite line are used as a communication path from the air traffic control center, the ground control is used when the air traffic control center listens to the received voice signal from the aircraft. An echo may be applied to the audio signal due to a delay time difference between the line and the communication satellite line, which makes it very difficult to hear.

Similarly, when a ground line and a communication satellite line are used as a communication path from the air traffic control center, when an audio signal received from the air traffic control center is listened to by an aircraft, the communication between the ground line and the communication satellite line is performed. The echo signal may be echoed due to the delay time difference, and it becomes very difficult to hear.

Accordingly, an object of the present invention is to solve the above-mentioned problems and to improve the voice quality heard by an air traffic control center and an aircraft even when a ground line and a communication satellite line are used as a communication path from the air traffic control center. It is an object of the present invention to provide a remote air-to-air wireless device and a remote air-to-air wireless system.

[0010]

SUMMARY OF THE INVENTION A remote air-to-air wireless device according to the present invention comprises first audio delay means for delaying an audio output signal received by a receiver, and second audio delay means for delaying an audio input signal transmitted from a transmitter. Voice delay means and delay time control means for setting a delay time in each of the first and second voice delay means in response to a delay instruction from outside.

[0011] A remote air-to-air wireless system according to the present invention is provided with a first remote air-to-air wireless device connected to an air traffic control center via a ground line and relaying transmission and reception of audio signals between the air traffic control center and an aircraft. A remote air-to-air wireless system connected to the air traffic control center via a communication satellite line and comprising a second remote air-to-air wireless device that relays transmission and reception of audio signals between the air traffic control center and the aircraft. An output means for superimposing and outputting audio signals from the first and second remote air-to-air wireless devices in the air traffic control center, and a first means for delaying an audio output signal from the aircraft received by a receiver. Voice delay means, second voice delay means for delaying a voice input signal transmitted from a transmitter to the aircraft, and the air traffic control center based on a voice signal from the output means In response to al of the delay instruction and a delay time control means for setting a delay time to said first and second audio delay means respectively to said first remote-air wireless device.

The remote air-to-air wireless device of the present invention is configured so that the delay time of the audio delay circuit for delaying the audio output signal from the receiver and the audio input signal to the transmitter is set by remote control from the air traffic control center. doing.

For this reason, when the air traffic control center uses the terrestrial line and the communication satellite line, the air traffic control center listens to an audio signal including an echo generated by a delay time difference between the lines, and based on the result of the listening. By setting the delay time of the audio delay circuit, it is possible to make an adjustment by remote control so as to minimize the echo.

[0014]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of one embodiment of the present invention. In the figure, a remote air-to-air wireless device 1 includes a receiver 10, a transmitter 11, a switch 12,
Audio delay circuits 13 and 14 and press signal delay circuit 15
, A delay time control circuit 16 and an antenna 17.

The receiver 10 outputs a received voice output from an aircraft (not shown) to an air traffic control center (not shown), and the transmitter 22 AM-modulates a transmitted voice signal transmitted from the air traffic control center. Send to aircraft. Switch 12
Connects one of the receiver 10 and the transmitter 11 to the antenna 17. The antenna 17 transmits and receives radio waves to and from the aircraft.

A voice delay circuit 13 delays a voice output signal from the aircraft received by the receiver 10 and outputs it to an air traffic control center. A voice delay circuit 14 delays a voice input signal to be transmitted to the aircraft and transmits the signal to the transmitter. 11 is output. The press signal delay circuit 15 delays the transmission press signal from the air traffic control center and notifies the transmitter 11 to start the transmission operation. The delay time control circuit 16 adds the delay times specified by the control signal from the air traffic control center to the audio delay circuit 13,
14 and the press signal delay circuit 15.

FIG. 2 is a block diagram showing a system configuration according to one embodiment of the present invention. In the figure, Air Traffic Control Center 2
Is connected to the remote air-to-air wireless device 1 via a ground line 100 and is connected to the remote air-to-air wireless device 6 via a communication satellite line 101.

In this case, the air traffic control center 2 is connected to a satellite ground station 3 via a communication satellite line 101, and the satellite ground station 3 is connected to a satellite ground station 5 via a communication satellite 4; Is connected to the remote air-to-air wireless device 6. Therefore, the air traffic control center 2 operates the remote air-to-air
To transmit and receive audio signals to and from the aircraft 7 via the.
The air traffic control center 2 and the aircraft 7 are superimposed with audio signals sent from the aircraft 7 and the air traffic control center 2 via the remote air-to-air radio devices 1 and 6 and output to a speaker or an earphone or the like (FIG. (Not shown).

Here, the radio wave emitted from the aircraft 7 is received by the receiver 10 of the remote air-to-air radio device 1, and
Is output to the audio delay circuit 13, and the audio delay circuit 13 converts the audio signal delayed by the time T1 set by the remote control from the air traffic control center 2 via the delay time control circuit 16 into the air traffic control circuit. It is transmitted to the center 2.

Conversely, when the aircraft 7 is called from the air traffic control center 2, a voice signal from the air traffic control center 2 is transmitted to the voice delay circuit 14 of the remote air-to-air radio unit 1 via the ground line 100. Then, the signal is delayed by the audio delay circuit 14 from the air traffic control center 2 via the delay time control circuit 16 by the time T1 set by remote control, and supplied to the transmitter 11.

At this time, from the air traffic control center 2 to the aircraft 7
The transmission press signal accompanying the voice signal to the wireless communication device 1 also transmits the press signal delay circuit 15
Is transmitted to the transmitter 11 after being delayed by the press signal delay circuit 15 from the air traffic control center 2 via the delay time control circuit 16 by the time T1 set by remote control,
The transmission operation of the transmitter 11 is started. Therefore, the transmitter 11
Emits an audio signal from the air traffic control center 2 to the aircraft 7 delayed by the time T1 from the antenna 17 as a radio wave.

FIG. 3 is a timing chart showing a transmission / reception operation between the air traffic control center 2 and the aircraft 7 according to one embodiment of the present invention. The transmission / reception operation between the air traffic control center 2 and the aircraft 7 according to one embodiment of the present invention will be described with reference to FIGS.

The delay time difference T 1 between the received voice output of the receiver 10 and the voice output of the voice delay circuit 13 in the remote air-to-air wireless device 1 is controlled by the delay time control circuit 16 by remote control from the air traffic control center 2. 13 is set.

The air traffic control center 2 superimposes and listens to the audio signals received by the remote air-to-air radio devices 1 and 6, and the delay time difference between the audio signals is T1-T2. Therefore,
If T1 = T2, that is, if the delay time of the audio delay circuit 13 can be matched with the delay time of the communication satellite line 101, the echo of the audio signal generated when using the communication satellite line 101 can be eliminated (see FIG. 3). ).

In this case, the delay time of the audio delay circuit 14 and the press signal delay circuit 15 also
Similarly to the above, T1 is set to T2, so that the aircraft 7 can simultaneously receive the radio waves from the remote air-to-air wireless devices 1 and 6, so that the aircraft 7 can also hear the audio signal without echo. .

FIG. 4 is a block diagram showing the configuration of another embodiment of the present invention. FIG. 1 shows the configuration of the remote air-to-air wireless device 8 when a transmission press signal from the air traffic control center 2 is superimposed on a transmission audio signal as a PTT tone signal.

That is, the remote air-to-air wireless device 8 according to another embodiment of the present invention shown in FIG. 1 except that a PTT tone detecting circuit 81 and a PTT tone removing circuit 82 are provided. 1, and the same components are denoted by the same reference numerals. Also,
The operation of these same components is the same as that of the remote air-to-air wireless device 1 according to the embodiment of the present invention.

The operation of the remote air-to-air radio device 8 according to another embodiment of the present invention will be described with reference to FIG. Note that the operation of the receiving system of the remote air-to-air wireless device 8 is the same as the operation of the receiving system of the remote air-to-air wireless device 1 shown in FIG. 1, and therefore only the operation of the transmitting system will be described.

A voice signal from the air traffic control center 2 is transmitted to a voice delay circuit 14 of the remote air-to-air radio device 8 via a terrestrial line 101, and is transmitted to the air traffic control center 2 by the voice delay circuit 14.
And a PTT tone detection circuit 81 which is delayed by a time T1 set by remote control via a delay time control circuit 16
Is output to

The PTT tone detection circuit 81 detects a PTT tone for a signal in which the voice signal sent from the air traffic control center 2 and the PTT tone signal are superimposed,
When the PTT tone is detected, the detection result is notified to the transmitter 11 as a transmission press signal, and the transmission operation in the transmitter 11 is started.

The transmission audio signal that has passed through the PTT tone detection circuit 81 is sent to the transmitter 11 after the PTT tone signal is removed by the PTT tone removal circuit 82. The transmitter 11 AM-modulates the voice signal from which the PTT tone signal has been removed, and transmits the resulting signal from the antenna 17 to the aircraft 7.

In this case, if the delay times of the audio delay circuits 13 and 14 are set to T1 = T2 in the same manner as described above, the air traffic control center 2 and the aircraft 7 simultaneously transmit radio waves from the remote air-to-air radio devices 8 and 6. Since the sound signal can be received, the sound signal without echo can be heard at the air traffic control center 2 and the aircraft 7 when the sound signal is heard.

As described above, the voice delay circuit 13 and the voice delay circuit 1 based on the remote control from the air traffic control center 2 are provided to the remote air-to-air wireless devices 1 and 8 using the ground line 100.
3 is provided with a delay time control circuit 16 for setting a delay time, so that an echo of a voice signal generated when the air traffic control center 2 listens to a voice signal from the aircraft 7 is deleted by remote control from the air traffic control center 2. can do.

The voice delay circuit 14 and the press signal delay circuit 15 and the voice signal delay circuit 14 and the press signal delay circuit 15 based on the remote control from the air traffic control center 2 are provided to the remote air-to-air wireless device 1 using the ground line 100. By providing the circuit 15 with a delay time control circuit 16 for setting a delay time, or providing the remote air-to-air radio device 8 using the terrestrial line 100 with the voice delay circuit 14, the PTT tone detection circuit 81, and the PTT tone removal. By providing the circuit 82 and the delay time control circuit 16 for setting a delay time in the audio delay circuit 14 based on remote control from the air traffic control center 2,
The echo of the audio signal generated when the aircraft 7 listens to the audio signal from the air traffic control center 2 can be eliminated by remote control from the air traffic control center 2.

[0035]

As described above, according to the remote air-to-air radio apparatus of the present invention, the first audio delay means for delaying the audio output signal received by the receiver and the audio input signal transmitted from the transmitter are delayed. Communication means from the air traffic control center by providing a second voice delay means for performing the communication and a delay time control means for setting a delay time in each of the first and second voice delay means in response to a delay instruction from the outside. Even when a terrestrial line and a communication satellite line are used as routes, there is an effect that the quality of voice heard by an air traffic control center and an aircraft can be improved.

Further, according to the remote air-to-air radio system of the present invention, the first remote air-to-air system connected to the air traffic control center via the ground line and relaying the transmission and reception of the audio signal between the air traffic control center and the aircraft. In a remote air-to-air wireless system comprising a wireless device and a second remote air-to-air wireless device connected to the air traffic control center via a communication satellite line and relaying transmission and reception of audio signals between the air traffic control center and the aircraft, A first remote air-to-air wireless device that responds to a delay instruction from the air traffic control center based on the audio signal when the air traffic control center superimposes and outputs the audio signals from the first and second remote air-to-air wireless devices; Voice delay means for delaying a voice output signal from the aircraft received by the receiver and voice input provided to the first remote air-to-air radio device and transmitted from the transmitter to the aircraft. The delay time control means and the delay time control means respectively set the delay time to delay the signal, so that the air traffic control center and the aircraft can be used even when the ground line and the communication satellite line are used as the communication path from the air traffic control center. Thus, there is an effect that the quality of the voice to be listened to can be improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is a block diagram illustrating a system configuration according to an embodiment of the present invention.

FIG. 3 is a timing chart showing a transmission / reception operation between an air traffic control center and an aircraft according to one embodiment of the present invention.

FIG. 4 is a block diagram showing a configuration of another embodiment of the present invention.

FIG. 5 is a block diagram showing an example of a configuration of a conventional example.

FIG. 6 is a block diagram showing another example of the configuration of the conventional example.

[Explanation of symbols]

 1,6,8 Remote air-to-air radio equipment 2 Air traffic control center 3,5 Satellite ground station 4 Communication satellite 7 Aircraft 10 Receiver 11 Transmitter 13,14 Audio delay circuit 15 Press signal delay circuit 16 Delay time control circuit 81 PTT tone detection Circuit 82 PTT tone removal circuit

Claims (6)

[Claims] 1. A first audio delay unit for delaying an audio output signal received by a receiver, a second audio delay unit for delaying an audio input signal transmitted from a transmitter, and responding to an external delay instruction. And a delay time control means for setting a delay time in each of the first and second voice delay means. 2. The remote air-to-air wireless device according to claim 1, further comprising delay means for delaying an external transmission notification signal. 3. A detecting means for detecting an external transmission notification signal from the voice input signal delayed by the second voice delay means to notify the transmitter, and detecting the transmission notification signal by the detection means. 2. The remote air-to-air wireless device according to claim 1, further comprising: a removing unit that removes the transmission notification signal from the audio input signal delayed by the second audio delay unit when the signal is transmitted. 4. A first remote air-to-air wireless device connected to an air traffic control center via a ground line and relaying transmission and reception of voice signals between the air traffic control center and an aircraft, and via a communication satellite line. A remote air-to-air wireless system connected to the air traffic control center and comprising a second remote air-to-air wireless device that relays transmission and reception of audio signals between the air traffic control center and the aircraft, A first audio delay unit having output means for superimposing and outputting an audio signal from the remote air-to-air wireless device in the air traffic control center, and delaying an audio output signal from the aircraft received by a receiver; Second audio delay means for delaying an audio input signal transmitted from the transmitter to the aircraft;
A delay time control means for setting a delay time in each of the first and second voice delay means in response to a delay instruction from the air traffic control center based on a voice signal from the output means; A remote air-to-air wireless system, which is provided in an air-to-air wireless device. 5. The remote air-to-air radio system according to claim 4, further comprising delay means for delaying a transmission notification signal from said air traffic control center. 6. A detection means for detecting a transmission notification signal of the air traffic control center from the voice input signal delayed by the second voice delay means, and notifying the transmitter of the transmission notification signal; 5. The remote air-to-air radio system according to claim 4, further comprising: a removing unit that removes the transmission notification signal from the audio input signal delayed by the second audio delay unit when a signal is detected.