WO2015198753A1 - Dispositif de traitement du signal, dispositif transpondeur, dispositif radar, et procédé de traitement du signal - Google Patents

Dispositif de traitement du signal, dispositif transpondeur, dispositif radar, et procédé de traitement du signal Download PDF

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Publication number
WO2015198753A1
WO2015198753A1 PCT/JP2015/064262 JP2015064262W WO2015198753A1 WO 2015198753 A1 WO2015198753 A1 WO 2015198753A1 JP 2015064262 W JP2015064262 W JP 2015064262W WO 2015198753 A1 WO2015198753 A1 WO 2015198753A1
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WIPO (PCT)
Prior art keywords
signal
pulse
radar
function
communication
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PCT/JP2015/064262
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English (en)
Japanese (ja)
Inventor
達也 小嶋
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古野電気株式会社
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Publication of WO2015198753A1 publication Critical patent/WO2015198753A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/59—Responders; Transponders
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L15/00—Apparatus or local circuits for transmitting or receiving dot-and-dash codes, e.g. Morse code
    • H04L15/04—Apparatus or circuits at the transmitting end

Definitions

  • the present invention relates to a signal processing device, a transponder device, a radar device, and a signal processing method.
  • a ship sails on the sea.
  • the main channel of the ship includes, for example, a narrow channel or a point approaching the shore. In such places, the ship needs to accurately grasp the position of the ship so as not to leave the route. Therefore, a navigation buoy equipped with a radar beacon (hereinafter referred to as “Racon”) is installed in some of the locations approaching the gorge channel or the shore (see, for example, Patent Document 1).
  • the ship includes a radar device.
  • own ship a ship provided with a radar device is referred to as own ship.
  • the radar device transmits radar waves from its own ship to the surroundings.
  • the racon outputs a racon response wave in response to receiving the radar wave.
  • the radar apparatus receives and processes a radar reflected wave (hereinafter referred to as “radar echo”) generated when the radar wave is reflected on land or another ship.
  • the radar apparatus receives and processes a racon response wave in addition to the radar echo described above.
  • the radar apparatus displays an image based on the received racon response wave and radar echo on a PPI (Plan Position Indicator) screen. This image is an image showing the position of the land, the position of another ship, the position of the racon, and the like.
  • position information indicating the position of the racon can be given.
  • the configuration described in Patent Document 1 can transmit additional information other than position information in a racon response wave.
  • the radar device needs to distinguish between a racon having a communication function and a racon having no communication function.
  • the radar apparatus detects a racon having a communication function, it needs to shift from a detection state in which a target is detected to a communication state in which communication with the racon is performed.
  • a racon having a communication function needs to notify the radar apparatus that it has a communication function.
  • the racon needs to notify the radar device what function the racon has.
  • Patent Document 1 it cannot be said that such a configuration related to the notification function is considered.
  • the present invention has an object to provide a signal processing device, a transponder device, and a signal processing method capable of notifying the function of the transponder device in view of the above situation.
  • Another object of the present invention is to provide a signal processing device, a radar device, and a signal processing method capable of performing an operation according to the function of the transponder device when the transponder device is detected. With the goal.
  • a signal processing device in a transponder device that outputs a predetermined response signal in response to reception of a predetermined transmission signal.
  • a response signal generation unit and a function notification signal generation unit are provided.
  • the response signal generation unit is configured to generate the response signal.
  • the function notification signal generation unit is configured to generate a function notification signal that notifies a function of the transponder device.
  • the transponder device includes a communication unit, and the function includes a communication function for communicating with a communication device that transmits the transmission signal.
  • the signal processing device further includes a communication data generation unit.
  • the communication data generation unit generates communication data to be transmitted to the communication device when communication data is transmitted from the communication device to the transponder device.
  • the frequency of the response signal is different from the frequency of the function notification signal.
  • the response signal is amplitude-modulated so as to constitute a Morse code
  • the function notification signal is a signal obtained by modulating a predetermined digital signal sequence by a predetermined method
  • the function notification signal The generation unit generates the function notification signal by performing modulation processing on a predetermined signal sequence.
  • the function notification signal is transmitted while being temporally superimposed on the response signal.
  • the strength of the function notification signal is set smaller than the strength of the response signal.
  • a transponder device includes an antenna unit, a response signal generation unit, and a function notification signal generation unit.
  • the response signal generation unit generates a predetermined response signal in response to reception of a predetermined transmission signal by the antenna unit.
  • the function notification signal generation unit generates a function notification signal for notifying a function of the transponder device in response to reception of the transmission signal.
  • a signal processing method is a signal processing method in a transponder device that outputs a predetermined response signal in response to reception of a predetermined transmission signal.
  • a response signal generation step and a function notification signal generation step are included.
  • the response signal generation step generates the response signal.
  • the function notification signal generation step generates a function notification signal for notifying a function of the transponder device.
  • a signal processing device is a signal processing device provided in a radar device, and includes a detection signal generation unit, a detection unit, a signal processing unit, It has.
  • the detection signal generation unit is configured to generate a detection signal as a predetermined transmission signal.
  • the detection unit detects a function notification signal that is output from the transponder device that has received the detection signal and notifies a function of the transponder device.
  • the signal processing unit performs different processing when the function notification signal is detected and when the function notification signal is not detected.
  • the signal processing unit includes an image data generation unit that generates image data based on the response signal.
  • the image data generation unit generates different image data when the function notification signal is received and when the function notification signal is not received.
  • the image data generation unit when receiving the function notification signal, the image data generation unit generates image data of an image including an icon indicating that the function notification signal has been received.
  • the signal processing device further includes a communication data generation unit.
  • the detection unit detects a signal indicating that the communication function is provided as the function notification signal
  • the communication data generation unit generates communication data to be transmitted to the transponder device.
  • a radar apparatus includes an antenna unit for transmitting and receiving a signal, a detection signal generation unit, a detection unit, and a signal processing unit.
  • the detection signal generation unit is configured to generate a detection signal as a predetermined transmission signal.
  • the detection unit detects a function notification signal that is output from the transponder device that has received the detection signal and notifies a function of the transponder device.
  • the signal processing unit performs different processing when the function notification signal is detected and when the function notification signal is not detected.
  • a signal processing method is a signal processing method in a radar apparatus, and includes a detection signal generation step, a detection step, and a signal processing step. is doing.
  • the detection signal generation step generates a detection signal as a predetermined transmission signal.
  • the detection step detects a function notification signal that is output from the transponder device that has received the detection signal and notifies a function of the transponder device.
  • different processing is performed when the function notification signal is detected and when the function notification signal is not detected.
  • the transponder device can notify the function of the transponder device. Further, according to one aspect of the present invention, when a radar device is detected, the radar device can perform an operation according to the function of the transponder device.
  • the present invention can be widely applied as a signal processing device, a transponder device, a radar device, and a signal processing method.
  • FIG. 1 is a conceptual diagram for explaining the concept of a radar system 1 according to the present embodiment.
  • the radar system 1 is a marine radar system will be described as an example.
  • the radar system 1 may be a radar system for other moving objects such as an aircraft.
  • the radar system 1 includes a radar device 10 and a radar beacon (hereinafter referred to as a racon) 20.
  • the racon 20 is an example of the “transponder device” in the present invention.
  • FIG. 2 is a schematic diagram showing an example of the positional relationship between the radar apparatus 10 and the racon 20.
  • FIG. 2 shows a circular region centered on the radar apparatus 10 (own ship 2).
  • FIG. 2 shows a display corresponding to the display content on the PPI screen 16a (see FIG. 3) of the radar image display 16 to be described later of the radar apparatus 10.
  • FIG. 2 is a schematic diagram showing a state where the other ship 3 and the land 4 exist around the radar device 10 (own ship 2).
  • the radar apparatus 10 is a marine radar provided in a ship such as a fishing boat.
  • the ship provided with the radar device 10 is referred to as “own ship”.
  • a ship other than own ship 2 is called another ship.
  • the racon 20 is configured to notify the radar apparatus 10 of the position of the racon 20.
  • the racon 20 is disposed in a narrow channel.
  • a case where the ship 2 navigates the gorge channel will be described as an example.
  • a case where the radar communication data D10 of the radar apparatus 10 is transmitted from the radar apparatus 10 to the racon 20 is described as an example. Further, the case where the racon communication data D20 held by the racon 20 is transmitted from the racon 20 to the radar apparatus 10 will be described as an example.
  • the radar communication data D10 and the racon communication data D20 are information including at least one of characters, images, and sounds, respectively.
  • Examples of the radar communication data D10 include ID information such as the register of the ship 2.
  • Examples of the racon communication data D20 include information indicating the position (latitude and longitude) of the racon 20 and weather information of the sea area where the racon 20 is installed.
  • the racon communication data D20 is information that is not intended to be displayed on a PPI screen 16a (see FIG. 3) described later. In the present embodiment, the information specified by the racon communication data D20 is displayed on a screen different from the PPI screen 16a.
  • the racon communication data D20 is transmitted to the radar apparatus 10 by the racon communication pulse W22.
  • the racon communication data D20 is digital data. This digital data is data composed of a bit string.
  • the radar apparatus 10 is configured to alternately perform transmission of electromagnetic waves and reception of an echo signal Ec generated by reflection of the emitted electromagnetic waves. More specifically, the radar apparatus 10 is configured to transmit a radar wave W10.
  • the radar wave W10 includes a radar detection pulse W11 for detecting a target or a radar communication pulse W12 for communication.
  • the radar apparatus 10 can transmit the radar communication pulse W12 and has a function as a communication apparatus.
  • the racon 20 is configured to transmit a racon response wave W20 using the radar detection pulse W11 or the radar communication pulse W12 as a trigger.
  • the racon response wave W20 is an example of the “signal from the transponder device” in the present invention.
  • the racon response wave W20 includes a racon notification pulse W21 or a racon communication pulse W22.
  • the racon notification pulse W21 has a Morse pulse W211 and a function notification pulse W212.
  • the Morse pulse W211 is a pulse signal for notifying the radar apparatus 10 of the presence of the racon 20. More specifically, the Morse pulse W211 is a pulse signal for displaying the Morse code-like image M1 on the PPI screen 16a of the radar image display 16 to be described later.
  • the function notification pulse W212 is a pulse signal for notifying the radar apparatus 10 that the racon 20 has a communication function.
  • the frequency f212 of the function notification pulse W212 is different from the frequency f211 of the Morse pulse W211. Details of the function notification pulse W212 will be described later.
  • the racon communication pulse W22 is a pulse signal for transmitting the racon communication data D20 stored in the racon 20 to the radar apparatus 10.
  • FIG. 4 is a block diagram showing the configuration of the radar apparatus 10.
  • the radar apparatus 10 includes an antenna unit 11, a circulator 12, a transmitter 13, a receiver 14, a signal processing device 15, a radar image display 16, and a racon information display 17. And have.
  • the antenna unit 11 performs transmission of the radar wave (electromagnetic wave) W10 and reception of the antenna reception wave W1 (electromagnetic wave, reception signal) while rotating in the azimuth direction C1 (see FIG. 2) around the vertical axis. It is configured. Specifically, the antenna unit 11 outputs a radar wave W10 given from the transmitter 13 via the circulator 12. The antenna unit 11 receives the antenna reception wave W1 and outputs the antenna reception wave W1 to the receiver 14 via the circulator 12.
  • the antenna reception wave W1 includes an echo signal Ec.
  • the echo signal Ec is a reflected wave generated by the transmission of the radar detection pulse W11.
  • the antenna reception wave W1 received by the antenna unit 11 includes the racon response wave W20 (the racon notification pulse W21 or the racon communication pulse W22).
  • the antenna unit 11 repeats the operation of transmitting the radar wave W10 around 360 degrees around the ship 2 and the operation of receiving the antenna reception wave W1 while rotating in the azimuth direction C1.
  • the operation from when the antenna unit 11 transmits a pulsed radar wave W10 to when the next radar wave W10 is transmitted is referred to as “sweep”.
  • the operation in which the antenna unit 11 rotates 360 ° in the azimuth direction C1 while repeating the sweep is referred to as “scan”.
  • a transmission operation and a reception operation are performed using the antenna unit 11.
  • the electromagnetic wave transmitting antenna unit and the electromagnetic wave receiving antenna unit may be separate.
  • the transmitter 13 up-converts and amplifies the radar wave W10 (radar detection pulse W11 or radar communication pulse W12) generated by the signal processing device 15 to a predetermined RF (Radio frequency) frequency band.
  • the receiver 14 amplifies the antenna reception wave W1 from the antenna unit 11.
  • the receiver 14 includes an amplifier that receives and amplifies the antenna reception wave W1 and a down converter.
  • the down converter has an anti-aliasing filter and a mixer.
  • the receiver 14 outputs the amplified antenna reception wave W1 to a radar signal processing unit 151a, a function notification pulse detection unit 152, and a racon communication pulse demodulation processing unit 153, which will be described later, of the signal processing device 15.
  • the signal processing device 15 is configured to process the antenna reception wave W1.
  • the signal processing device 15 is based on the function of generating the radar wave W10, the function of generating image data G2 of the radar image based on the antenna reception wave W1, and the racon communication data D20 based on the racon communication pulse W22. And a function of displaying an image on the racon information display 17.
  • the signal processing device 15 is configured using a CPU, a RAM, a ROM (not shown), and the like.
  • the signal processing device 15 includes an image data generation unit 151, a function notification pulse detection unit 152, a racon communication pulse demodulation processing unit 153, a communication control unit 154, a radar communication pulse generation unit 155, and a radar detection pulse generation unit 156. And a transmission signal switching unit 157.
  • the image data generation unit 151 is provided for generating image data G2 to be output to the PPI screen 16a.
  • the image data generation unit 151 is an example of the “signal processing unit that performs different processing depending on whether the function notification signal is received or not”.
  • the image data generation unit 151 is configured to generate image data G2 based on the antenna reception wave W1. In the present embodiment, the image data generation unit 151 generates different image data G2 when the function notification pulse detection unit 152 detects the function notification pulse W212 and when the function notification pulse W212 is not detected.
  • the image data generation unit 151 includes a radar signal processing unit 151a and a radar image drawing unit 151b.
  • the radar signal processing unit 151a is a processing unit for generating image data G1 of radar video. More specifically, the radar signal processing unit 151a generates image data G1 based on the echo signal Ec and the Morse pulse W211 included in the antenna reception wave W1.
  • the radar signal processing unit 151a detects the echo signal Ec and the Morse pulse W211.
  • the radar signal processing unit 151a includes a band limiting filter 151c, a radar interference removal unit, a sensitivity adjustment unit, and the like.
  • the band limiting filter 151c has a pass band having a predetermined bandwidth.
  • the center of the bandwidth in the present embodiment is the frequency of the radar detection pulse W11, and the bandwidth is about the reciprocal of the pulse width of the radar detection pulse W11.
  • the image data G1 generated by the radar signal processing unit 151a is a signal in an R ⁇ coordinate system as a polar coordinate system with the position of the antenna unit 11 as the center.
  • the image data G1 is output to the radar image drawing unit 151b.
  • the radar image drawing unit 151b converts the image data G1 in the R ⁇ coordinate system into image data G2 in the XY coordinate system that is a signal in the orthogonal coordinate system.
  • the image data generation unit 151 includes predetermined icon data in the image data G2 when a function detection signal S1 described later is given from the function notification pulse detection unit 152.
  • the icon data is image data for displaying a predetermined icon M2 on the PPI screen 16a.
  • the icon M2 is an image for indicating that the racon 20 is a communicable racon (reception of the function notification pulse W212), and includes, for example, characters “communication OK”.
  • the radar apparatus 10 communicates with a racon that does not have a communication function, the racon transmits a Morse pulse but does not transmit a function notification pulse. Therefore, in this case, the function notification pulse W212 does not reach the radar apparatus 10 from the racon, and the function notification signal S1 is not given to the radar image drawing unit 151b.
  • the radar image drawing unit 151b does not include the data of the icon M2 in the image data G2. Therefore, the icon M2 is not displayed on the PPI screen 16a.
  • the radar image drawing unit 151b outputs the image data G2 to the radar image display 16.
  • the radar image display 16 displays a radar image corresponding to the echo signal Ec and the Morse pulse W211 using the image data G2.
  • An example of the display on the PPI screen 16a of the radar image display 16 is shown in FIG.
  • the waveform of the Morse pulse W211 is displayed in the Morse code form on the PPI screen 16a of the radar image display 16.
  • a Morse code image M1 representing the code “K” is displayed on the PPI screen 16a.
  • an operator who has seen the PPI screen 16a can know the presence and position of the racon 20.
  • the Morse pulse W211 is not included in the antenna reception wave W1
  • the Morse code image M1 based on the Morse pulse W211 is not displayed.
  • the radar image display 16 is a display device such as a liquid crystal display.
  • the radar image display 16 includes a PPI scope (Plan Position Indicator scope).
  • the PPI scope is configured to two-dimensionally display the location of the target by scanning lines that rotate on a circular display area.
  • a racon information display 17 is provided.
  • the racon information display 17 is a display for displaying information specified by the racon communication data D20.
  • the racon information indicator 17 is a display device such as a liquid crystal display.
  • the racon information display 17 and the radar image display 16 are configured separately, but this need not be the case.
  • racon information display 1 7 and the radar image display 16 may be constituted by a display device having one display screen.
  • the racon information display 17 is given racon communication data D20 from the racon communication pulse demodulation processing unit 153 via the communication control unit 154.
  • the racon communication pulse demodulation processing unit 153 is configured to demodulate the racon communication pulse W22 by a predetermined demodulation method (for example, phase modulation method) when the antenna received wave W1 includes the racon communication pulse W22. ing.
  • the racon communication pulse demodulation processing unit 153 outputs the digital racon communication data D20 obtained by the demodulation process to the communication control unit 154.
  • a function notification pulse detection unit 152 is provided in parallel with the racon communication pulse demodulation processing unit 153.
  • the function notification pulse detection unit 152 is an example of the “detection unit” of the present invention, and is configured to detect whether or not the function notification pulse W212 from the racon 20 is included in the antenna reception wave W1.
  • the function notification pulse detection unit 152 includes a band limiting filter 152a and a correlation processor 152b.
  • the band limiting filter 152a is configured to pass a pulse having a frequency in a predetermined band.
  • the center frequency f152a of the pulse that can pass through the band limiting filter 152a is different from the center frequency f151c of the pulse that can pass through the band limiting filter 151c of the radar signal processing unit 151a.
  • the center frequency f152a and the center frequency f151c differ, for example, by about 20 MHz.
  • the band limiting filter 152a is configured to pass the function notification pulse W212 and to remove the Morse pulse W211.
  • the signal that has passed through the band limiting filter 152a is output to the correlation processor 152b.
  • the correlation processor 152b is provided for evaluating whether or not the function notification pulse W212 is included in the signal that has passed through the band limiting filter 152a.
  • the correlation processor 152b has an evaluation digital signal sequence (for example, ⁇ 1, 0, 1, 0, 1, 0, 1, 0, 1 ⁇ ).
  • the correlation processor 152b compares the digital signal sequence of the signal that has passed through the band limiting filter 152a with the evaluation digital signal sequence. When the correlation value between these two digital signal sequences exceeds a predetermined threshold value, function notification pulse detector 152 determines that function notification pulse W212 exists.
  • the function notification pulse detection unit 152 When the function notification pulse detection unit 152 detects the function notification pulse W212, the function notification pulse detection unit 152 outputs the function detection signal S1 to the radar image drawing unit 151b, the communication control unit 154, and the transmission signal switching unit 157.
  • the function notification pulse detection unit 152 detects the function notification pulse W212, the radar apparatus 10 shifts from a detection mode for detecting a target such as the other ship 3 to a communication mode for communicating with the racon 20.
  • the communication control unit 154 analyzes received information such as characters, images, and voices specified by the racon communication data D20. Further, the communication control unit 154 outputs the racon communication data D20 to the racon information display unit 17. As described above, the racon information display 17 displays an image based on the racon communication data D20 provided from the communication control unit 154. Thereby, the operator of the radar apparatus 10 can visually recognize the communication information from the racon 20.
  • the communication control unit 154 is configured to generate a digital signal sequence of the radar communication data D10 when the function detection signal S1 is given.
  • the digital signal sequence of the radar communication data D10 includes a first signal sequence, a second signal sequence, and a third signal sequence.
  • the first signal series is a signal series as a preamble indicating that it is radar communication data D10 (radar communication pulse W12).
  • the second signal sequence is a signal sequence that specifies a code for error detection and error correction.
  • the third signal series is a signal series that specifies information related to the radar apparatus 10.
  • the information related to the radar device 10 can be exemplified by ID information such as the register of the ship 2 as described above.
  • the digital signal sequence of the radar communication data D10 is, for example, a binary code string represented by binary values “0” and “1”.
  • the communication control unit 154 outputs the generated radar communication data D10 to the radar communication pulse generation unit 155.
  • the radar communication pulse generation unit 155 is an example of the “communication data generation unit” in the present invention.
  • the radar communication pulse generation unit 155 When the function notification pulse W212 indicating that the communication function is provided is detected by the function notification pulse detection unit 155, the radar communication pulse generation unit 155 generates a radar communication pulse W12 to be transmitted to the racon 20.
  • the radar communication pulse generation unit 155 performs modulation processing on the digital signal series of the radar communication data D10. Thereby, the radar communication pulse generation unit 155 generates the radar communication pulse W12.
  • the above-described modulation processing method is not particularly limited as long as it is a general digital communication method.
  • the radar communication pulse generation unit 155 outputs the radar communication pulse W12 to the transmission signal switching unit 157.
  • the transmission signal switching unit 157 is configured to alternatively output the radar detection pulse W11 and the radar communication pulse W12.
  • the radar detection pulse W11 is generated by the radar detection pulse generation unit 156.
  • the radar detection pulse generation unit 156 generates a radar detection pulse W11 having a predetermined transmission frequency.
  • the radar detection pulse generation unit 156 is an example of the “detection signal generation unit” in the present invention.
  • the radar detection pulse W11 is an example of the “detection signal as a predetermined transmission signal” in the present invention.
  • the radar detection pulse generation unit 156 outputs the radar detection pulse W11 to the transmission signal switching unit 157 at a predetermined cycle.
  • the transmission signal switching unit 157 is configured to output a radar detection pulse W11 when the radar device 10 is in the detection mode, and to output a radar communication pulse W12 when the radar device 10 is in the communication mode. ing. More specifically, the transmission signal switching unit 157 outputs the radar communication pulse W12 to the transmitter 13 for a predetermined period when the function detection signal S1 is given.
  • the transmission signal switching unit 157 outputs the radar detection pulse W11 to the transmitter 13 when the function notification signal S1 is not given.
  • the transmission signal switching unit 157 changes the output signal according to the presence / absence of the function notification signal S1.
  • FIG. 5 is a block diagram showing a configuration of the racon 20. Next, a specific configuration of the racon 20 will be described. As shown in FIGS. 1 and 5, the racon 20 is provided as a transponder device, and is configured to transmit a racon response wave W20 in response to receiving the radar wave W10. In the present embodiment, the racon 20 is a racon with a communication function configured to be capable of data communication with the radar apparatus 10.
  • the racon 20 includes an antenna unit 21, a circulator 22, a receiver 23, and a transmitter 2. 4, a signal processing device 25, and a radar communication information memory 26.
  • the antenna unit 21 is configured to perform reception of electromagnetic waves and transmission of electromagnetic waves. Specifically, the antenna unit 21 receives the radar wave W ⁇ b> 10 and outputs the radar wave W ⁇ b> 10 to the receiver 23 via the circulator 22. The antenna unit 21 radiates a racon response wave W20 output from the transmitter 24 via the circulator 22. As described above, the racon response wave W20 includes either the racon notification pulse W21 or the racon communication pulse W22.
  • the antenna unit 21 is used to transmit and receive electromagnetic waves.
  • the electromagnetic wave transmitting antenna unit and the electromagnetic wave receiving antenna unit may be separate.
  • the receiver 23 amplifies the radar wave W10 output from the circulator 22 and outputs it to the signal processing device 25.
  • the receiver 23 includes an amplifier that receives and amplifies the radar wave W10, and a down converter.
  • the down converter has an anti-aliasing filter and a mixer.
  • the receiver 23 outputs the radar wave W10 to a radar pulse detection unit 251 and a radar communication pulse demodulation processing unit 254 described later of the signal processing device 25.
  • the transmitter 24 up-converts and amplifies the radar response wave W20 (the racon notification pulse W21 or the racon communication pulse W22) generated by the signal processing device 25 to a predetermined RF frequency band.
  • the signal processing device 25 is an example of the “communication unit” in the present invention, and is capable of data communication with the signal processing device 15 of the radar device 10.
  • the signal processing device 25 is provided as a transponder device that outputs a Morse pulse W211 as a response signal in response to receiving the radar detection pulse W11 as a transmission signal.
  • the signal processing device 25 generates a racon response wave W20 corresponding to the radar detection pulse W11 or the radar communication pulse W12 from the radar device 10, and performs transmission processing of the racon response wave W20.
  • the signal processing device 25 is configured using a CPU, a RAM, a ROM (not shown), and the like.
  • the signal processing device 25 includes a radar pulse detection unit 251, a transmission frequency setting unit 252, a racon notification pulse generation unit 253, a radar communication pulse demodulation processing unit 254, a communication control unit 255, and a racon communication pulse generation unit 256. , And a transmission signal switching unit 257.
  • the radar pulse detector 251 is configured to detect the radar detection pulse W11 or the radar communication pulse W12. When the radar detection pulse W11 is received by the antenna unit 21, the radar pulse detection unit 251 detects the frequency of the radar detection pulse W11. In this case, the radar pulse detector 251 generates a radar detection pulse detection signal S21.
  • the radar detection pulse detection signal S21 is a signal indicating that the radar detection pulse W11 has been detected, and a signal indicating the frequency of the radar detection pulse W11.
  • the radar pulse detection unit 251 outputs the radar detection pulse detection signal S21 and the frequency detection signal S21 to the transmission frequency setting unit 252, the communication control unit 255, and the transmission signal switching unit 257.
  • the racon 20 shifts from the standby mode to the communication operation mode by detecting the radar detection pulse W11.
  • the standby mode refers to a state where the system waits for the radar wave W10 to arrive from the radar apparatus 10.
  • the communication operation mode refers to a state in which the racon 20 operates to communicate with the radar apparatus 10.
  • the radar pulse detection unit 251 generates a radar communication pulse detection signal S23 when the antenna unit 21 receives the radar communication pulse W12. In this case, the radar pulse detection unit 251 outputs the radar communication pulse detection signal S23 to the communication control unit 255 and the transmission signal switching unit 257.
  • the transmission frequency setting unit 252 is configured to set the frequency f211 of the Morse pulse W211 of the racon notification pulse W21 and the frequency f212 of the function notification pulse W212 of the racon notification pulse W21.
  • the transmission frequency setting unit 252 sets the frequency f211 of the Morse pulse W211 to be the same as the frequency of the radar detection pulse W11. That is, the racon 20 operates as a frequency agile racon. On the other hand, the transmission frequency setting unit 252 sets the frequency f212 of the function notification pulse W212 to a value different from the frequency f211 of the Morse pulse W211 (the frequency of the radar detection pulse W11).
  • the frequency f212 of the function notification pulse W212 is set, for example, 20 MHz higher than the frequency f211 of the Morse pulse W211 (the frequency of the radar detection pulse W11).
  • the transmission frequency setting unit 252 outputs the frequency setting signal S24 of the Morse pulse W211 to the Morse pulse generating unit 253a described later of the racon notification pulse generating unit 253. Further, the transmission frequency setting unit 252 outputs the frequency setting signal S25 of the function notification pulse W212 to the function notification pulse generation unit 253b described later of the racon notification pulse generation unit 253.
  • the racon notification pulse generator 253 is configured to generate a racon notification pulse W21.
  • the racon notification pulse generation unit 253 includes a Morse pulse generation unit 253a, a function notification pulse generation unit 253b, and an adder 253c.
  • the Morse pulse generator 253a is an example of the “response signal generator” in the present invention.
  • the Morse pulse generator 253a generates a Morse pulse W211 having the frequency f211 set by the transmission frequency setting unit 252.
  • the Morse pulse W211 is an example of the “response signal” in the present invention.
  • the Morse pulse W211 is generated, for example, by modulating a digital signal sequence of Morse code “ ⁇ ⁇ ⁇ ” indicating the alphabet “K” by amplitude modulation.
  • the waveform of the Morse pulse W211 is as shown in FIG.
  • the Morse pulse W211 is output to the adder 253c.
  • the function notification pulse generator 253b is an example of the “function notification signal generator” in the present invention.
  • the function notification pulse generation unit 253b generates a function notification pulse W212 having the frequency f212 set by the transmission frequency setting unit 252.
  • the function notification pulse W212 is used as a function notification signal for notifying the data communication function of the racon 20.
  • the function notification pulse W212 is generated by modulating a predetermined digital signal sequence (for example, “1, 0, 1, 0, 1, 0, 1, 0, 1”) by a predetermined method. This digital signal sequence is set to be the same as the digital signal sequence for evaluation stored in the correlation processor 152b of the radar apparatus 10 described above.
  • the function notification pulse generator 253b outputs a function notification pulse W212 to the adder 253c.
  • the adder 253c adds the Morse pulse W211 and the function notification pulse W212. By adding these pulses W211, W212, a racon notification pulse W21 is generated. Adder 253c outputs racon notification pulse W21 to transmission signal switching section 257.
  • the radar communication pulse demodulation processing unit 254 is configured to demodulate the radar communication pulse W12 when the radar wave W10 includes the radar communication pulse W12.
  • the radar communication pulse demodulation processing unit 254 outputs digital radar communication data D10 obtained by the demodulation processing to the communication control unit 255.
  • the communication control unit 255 analyzes received information such as characters, images, and voices specified by the radar communication data D10. Further, the communication control unit 255 outputs the radar communication data D10 to the radar communication information memory 26.
  • the radar communication information memory 26 stores radar communication data D10. Thereby, the racon 20 can acquire the traffic history of ships, such as the own ship 2 which passes the circumference
  • the communication control unit 255 is configured to generate a digital signal sequence of the racon communication data D20 when the radar communication pulse detection signal S23 is given.
  • the digital signal sequence of the racon communication data D20 includes a first signal sequence, a second signal sequence, and a third signal sequence.
  • the first signal sequence is a signal sequence as a preamble indicating the racon communication data D20 (racon communication pulse W22).
  • the second signal sequence is a signal sequence that specifies a code for error detection and error correction.
  • the third signal series is a signal series that specifies information related to the racon 20.
  • the digital signal sequence of the racon communication data D20 is a binary code string.
  • the communication control unit 255 outputs the generated racon communication data D20 to the racon communication pulse generation unit 256.
  • the racon communication pulse generation unit 256 is an example of the “communication data generation unit” of the present invention, and is configured to perform generation processing of the racon communication pulse W22.
  • the racon communication pulse generation unit 256 performs modulation processing on the digital signal sequence of the racon communication data D20. As a result, the racon communication pulse generation unit 256 generates the racon communication pulse W22 and outputs the racon communication pulse W22 to the transmission signal switching unit 257.
  • the transmission signal switching unit 257 is configured to alternatively output the racon communication pulse W22 and the racon notification pulse W21.
  • the transmission signal switching unit 257 outputs a racon notification pulse W21 when the racon 20 receives the radar detection pulse W11, and outputs a radar communication pulse W22 when the racon 20 receives the radar communication pulse W12. It is configured as follows. More specifically, the transmission signal switching unit 257 outputs the racon notification pulse W21 to the transmitter 24 when the radar detection pulse detection signal S21 is given from the radar pulse detection unit 251.
  • the transmission signal switching unit 257 when receiving the radar communication pulse detection signal S23 from the radar pulse detection unit 251, the transmission signal switching unit 257 outputs the racon communication pulse W22 to the transmitter 24. As described above, the transmission signal switching unit 257 varies the output pulse according to the detection result of the radar pulse detection unit 251.
  • the above is the main configuration of the racon 20.
  • FIG. 7 is a schematic plan view for explaining the communicable range AR in which the radar apparatus 10 and the racon 20 can communicate bidirectionally.
  • the antenna unit 11 of the radar apparatus 10 is an antenna with high directivity.
  • the range (communication range AR) in which the radar wave W10 from the antenna unit 11 can reach the racon 20 is narrow.
  • the communicable range AR is about several degrees in the azimuth direction C1. Communication between the radar device 10 and the racon 20 is possible only when the radar wave W10 from the antenna unit 11 rotating in the azimuth direction C1 reaches the racon 20.
  • FIG. 8 is a flowchart for explaining an example of a processing flow in the signal processing device 15 of the radar device 10.
  • FIG. 8 when explaining the flow of processing in the radar apparatus 10, figures other than FIG.
  • the signal processing device 15 reads out and executes each step of the flowchart shown below from a memory (not shown).
  • This program can be installed externally.
  • the installed program is distributed in a state stored in a recording medium, for example.
  • the flowchart shown in FIG. 8 shows processing after the function notification pulse detection unit 152 receives the Morse pulse W211.
  • the transmission signal switching unit 157 of the signal processing device 15 determines whether the radar device 10 is in the detection mode or the communication mode (step S11).
  • the transmission signal switching unit 157 determines that the communication mode is set (communication mode in step S11).
  • the transmission signal switching unit 157 performs transmission processing of the radar communication pulse W12 (step S12).
  • the transmission signal switching unit 157 outputs the radar communication pulse W12 generated by the radar communication pulse generation unit 155 to the transmitter 13.
  • the image data generation unit 151 of the signal processing device 15 generates image data G2 of an image having the icon M2 (step S13).
  • the image data G2 is output from the image data generation unit 151 to the radar image display 16.
  • an image including the icon M2 is displayed on the PPI screen 16a.
  • the transmission signal switching unit 157 determines that the detection mode is set (detection mode in step S11). In this case, the transmission signal switching unit 157 performs transmission processing of the radar detection pulse W11 (step S14). Specifically, the transmission signal switching unit 157 outputs the radar detection pulse W11 generated by the radar detection pulse generation unit 156 to the transmitter 13.
  • the image data generation unit 151 of the signal processing device 15 generates image data G2 of an image that does not include the icon M2 (step S15).
  • the image data G2 is output from the image data generation unit 151 to the radar image display 16. As a result, an image not including the icon M2 is displayed on the PPI screen 16a.
  • FIG. 9 is a flowchart for explaining an example of a processing flow in the signal processing device 25 of the racon 20.
  • FIG. 9 when explaining the flow of processing in the racon 20, reference is also made to figures other than FIG. 9 as appropriate.
  • the signal processing device 25 reads out and executes each step of the flowchart shown below from a memory (not shown).
  • This program can be installed externally.
  • the installed program is distributed in a state stored in a recording medium, for example.
  • radar pulse detection unit 251 of signal processing device 25 determines whether or not radar detection pulse W11 has been received (step S21).
  • the transmission signal switching unit 257 performs transmission processing of the racon notification pulse W21 (step S22).
  • the transmission signal switching unit 257 outputs the racon notification pulse W21 generated by the racon notification pulse generation unit 253 to the transmitter 24.
  • the radar pulse detection unit 251 determines the presence or absence of the radar communication pulse W12 (step S23).
  • the transmission signal switching unit 257 performs transmission processing of the racon communication pulse W211 (step S24). In this case, the transmission signal switching unit 257 outputs the racon communication pulse W22 generated by the racon communication pulse generation unit 256 to the transmitter 24.
  • the radar pulse detection unit 251 determines that the radar wave from the radar device having the communication function is not received. In this case, the radar pulse detection unit 251 determines again whether or not the radar detection pulse W11 has been received (step S21).
  • FIG. 10 is a conceptual graph for explaining the racon notification pulse W21.
  • the horizontal axis of the graph in FIG. 10 indicates time, and the vertical axis of the graph in FIG. 10 indicates frequency.
  • the vertical axis of the graph of FIG. 10 indicates the signal intensity.
  • the frequency f211 of the Morse pulse W211 is set to be the same as the frequency of the radar detection pulse W11.
  • the Morse pulse W211 is a pulse indicating the alphabet “K”, and the “long point, short point, long point” corresponding to the Morse code “ ⁇ ⁇ ⁇ ” of “K”. It is a pulse signal.
  • the frequency f212 of the function notification pulse W212 is different from the frequency f211 of the Morse pulse W211 (frequency of the radar detection pulse W11).
  • the frequency f212 of the function notification pulse W212 > the frequency f211 of the Morse pulse W211.
  • the function notification pulse W212 is a pulse of a predetermined digital signal sequence (in this embodiment, “1, 0, 1, 0, 1, 0, 1, 0, 1”).
  • the function notification pulse W212 is superimposed on the long point or short point of the Morse pulse W211 in time.
  • the function notification pulse W212 is superimposed on the first long point of the Morse pulse W211 in time.
  • the transmission power of the function notification pulse W212 is the Morse pulse W21.
  • the transmission power is set to be smaller than 1. For this reason, the degree to which the function notification pulse W212 interferes with the Morse pulse W211 can be reduced. Therefore, it is possible to suppress an unnecessary image due to the function notification pulse W212 from appearing in the Morse code image M1 on the PPI screen 16a.
  • the program related to the signal processing device 15 of the radar apparatus 10 of the present embodiment may be a program that causes a computer to execute the processing of the signal processing device 15. By installing and executing this program on a computer, the signal processing device 15 and the signal processing method in the present embodiment can be realized.
  • the CPU (Central Processing Unit) of the computer includes an image data generation unit 151, a function notification pulse detection unit 152, a racon communication pulse demodulation processing unit 153, a communication control unit 154, a radar communication pulse generation unit 155, and a radar detection pulse generation. Functions as a unit 156 and a transmission signal switching unit 157 to perform processing.
  • the signal processing device 15 may be realized by cooperation of software and hardware as in the present embodiment, or may be realized by hardware.
  • the program related to the signal processing device 25 of the racon 20 of the present embodiment may be a program that causes a computer to execute the processing of the signal processing device 25.
  • the CPU Central Processing Unit
  • the CPU includes a radar pulse detection unit 251, a transmission frequency setting unit 252, a racon notification pulse generation unit 253, a radar communication pulse demodulation processing unit 254, a communication control unit 255, and a racon communication pulse generation unit. 256 and the transmission signal switching unit 257 to perform processing.
  • the signal processing device 25 may be realized by cooperation of software and hardware as in the present embodiment, or may be realized by hardware.
  • the function notification pulse generation unit 253b generates the function notification pulse W212 for notifying the communication function of the racon 20.
  • the racon 20 can notify the radar apparatus 10 of the function of the racon 20. Thereby, the radar apparatus 10 can perform an operation according to the function of the racon 20 when the racon 20 is detected.
  • the signal processing device 25 of the racon 20 can notify the signal processing device 15 of the radar apparatus 10 that the racon 20 has a communication function by using the function notification pulse W212. it can. Thereby, the radar apparatus 10 can know that the racon 20 has a data communication function. Therefore, communication between the radar apparatus 10 and the racon 20 can be performed.
  • the racon communication pulse generator 256 of the racon 20 generates a racon communication pulse W22 to be transmitted to the radar apparatus 10 when the radar communication pulse W12 is transmitted to the racon 20. Thereby, data communication using a pulse signal between the radar apparatus 10 and the racon 20 becomes possible.
  • the function notification pulse detection unit 152 can more reliably separate the Morse pulse W211 and the function notification pulse W212. Therefore, in the function notification pulse detection unit 152, the detection accuracy of the function notification pulse W212 can be further increased. Further, the function notification pulse W212 can be removed while passing the Morse pulse W211 in the frequency filter of the radar signal processing unit 151a of the radar apparatus 10.
  • the radar signal processing unit 151a can more reliably separate the Morse pulse W211 and the function notification pulse W212. Therefore, it can suppress that the echo image by the function notification pulse W212 is displayed on the PPI screen 16a. Further, even in a radar apparatus that does not have a communication function, it is possible to increase the degree to which the frequency filter normally provided in the radar signal processing unit can remove the function notification pulse W212. Therefore, even in a radar apparatus that does not have a communication function, the adverse effect caused by the contrast of the echo image caused by the function notification pulse W212 on the PPI screen can be made relatively small.
  • the function notification pulse generation unit 253b can generate the function notification pulse W212 with a simple configuration in which a predetermined digital signal sequence is subjected to modulation processing.
  • each modulation processing method will be described in more detail.
  • FIGS. 11 to 13 are graphs for explaining the modulation processing of the Morse pulse W211 and the function notification pulse W212.
  • FIG. 11A and FIG. 11B are graphs for explaining the case where the function notification pulse W212 is generated by amplitude modulation.
  • FIGS. 12A, 12B, and 12C are graphs for explaining the case where the function notification pulse W212 is generated by phase modulation.
  • FIGS. 13A and 13B are graphs for explaining the case where the function notification pulse W212 is generated by frequency modulation.
  • the synthesized wave W213 (W213a) in FIG. 11A corresponds to the first long point of the Morse code “ ⁇ ••” in time to the Morse pulse W211 (W211a) indicating the Morse signal “ ⁇ ••”.
  • the state where the function notification pulse W212 (W212a) including the pulse ⁇ 1a is superimposed is shown.
  • the frequency and amplitude of the Morse pulse W211a are different from the frequency and amplitude of the function notification pulse W212a.
  • the pulse ⁇ 2a in the portion corresponding to the first long point of the Morse code “ ⁇ ...” Is a pulse signal in which disturbance occurs.
  • Such a pulse ⁇ 2a is generated due to generation of the Morse pulse W211a and the function notification pulse W212a using amplitude modulation.
  • the band limiting filter 151c of the radar signal processing unit 151a cannot completely remove the function notification pulse W212a superimposed on the Morse pulse W211a.
  • the residual component of the function notification pulse W212a passes through the band limiting filter 151c, the residual component is included in the image data G2.
  • the Morse code image M1 becomes bright and dark due to this residual component.
  • the output (power) of the function notification pulse W212a is the output of the Morse pulse W211a ( It is smaller than (electric power).
  • function notification pulse W212 (W212b) is generated using phase modulation as shown in FIGS. 12 (a) and 12 (b), as shown in FIG. 12 (a), synthesized wave W213 ( It is possible to suppress the occurrence of waveform disturbance in W213b).
  • the synthesized wave W213b is a pulse ⁇ 1b that temporally corresponds to the first long point of the Morse code “ ⁇ ••” to the Morse pulse W211 (W211b) indicating the Morse signal “ ⁇ ••”.
  • a function notification pulse W212 (W212b) including is superimposed.
  • the frequency of the Morse pulse W211b and the frequency of the function notification pulse W212b are different.
  • the Morse pulse W211b and the function notification pulse W212b have the same amplitude and the same oscillation timing. Therefore, in the signal output from the band limiting filter 151c of the radar signal processing unit 151a, the function notification pulse W212b. Can more reliably suppress the disturbance of the Morse pulse W211b.
  • the PPI screen 16a it is possible to suppress the occurrence of light and dark in the Morse code image M1 due to the function notification pulse W212b. Therefore, the radar apparatus 10 can show a more natural image to the operator of the radar apparatus 10.
  • the function notification pulse W212 (W212c) may be generated using frequency modulation.
  • the synthesized wave W213 (W213c) temporally corresponds to the first long point of the Morse code "-" to the Morse pulse W211 (W211c) indicating the Morse signal "-".
  • the function notification pulse W212 (W212c) including the pulse ⁇ 1c is superimposed.
  • the frequency of the Morse pulse W211c and the frequency of the function notification pulse W212c are different. In the pulse ⁇ 1c, when one output is zero among the signals lower and higher than the frequency of the Morse pulse W211c, the other output is 1.
  • the function notification pulse W212c can suppress the Morse pulse W211c from being disturbed. Therefore, even when the function notification pulse W212c is generated using frequency modulation, it is possible to suppress the disturbance of the waveform of the composite wave W213c, as in the case where the function notification pulse W212b is generated using phase modulation. As a result, the radar apparatus 10 can show a more natural image to the operator of the radar apparatus 10.
  • the function notification pulse W212 is transmitted in a time superimposed manner with the Morse pulse W211.
  • the function notification pulse W212 is masked by the Morse pulse W211.
  • an unnecessary echo image due to the function notification pulse W212 is suppressed from being displayed on the PPI screen 16a.
  • the frequency f211 of the Morse pulse W211 is different from the frequency f212 of the function notification pulse W212.
  • the band limiting filter 151c of the radar signal processing unit 151a of the radar apparatus 10 may not be able to reduce the function notification pulse W212 to a noise level or less. is there.
  • the function notification pulse W212 is transmitted while being temporally superimposed on the Morse pulse W211. Thereby, the residual component that has passed through the band limiting filter 151c in the function notification pulse W212 is masked by the Morse pulse W211.
  • the strength of the function notification pulse W212 is set smaller than the strength of the Morse pulse W211.
  • the degree of interference between the function notification pulse W212 and the Morse pulse W211 can be reduced. Therefore, it is possible to suppress an unnecessary image due to the function notification pulse W212 from appearing in the Morse code image M1 on the PPI screen 16a.
  • the image data generation unit 151 receives the Morse pulse W211 from the racon 20 and detects the function notification pulse W212 (communication mode in step S11). Different image data G2 is generated when the function notification pulse W212 is not detected (detection mode in step S11).
  • the image data generation unit 151 when receiving the function notification pulse W212, the image data generation unit 151 generates image data G2 of an image including an icon M2 indicating that the function notification pulse W212 has been received.
  • the image data generation part 151 produces
  • the radar apparatus 10 can display the image according to the presence or absence of reception of the function notification pulse W212 on the PPI screen 16a. Thereby, the operator of the radar apparatus 10 can confirm the presence or absence of a communication function in the racon such as the racon 20 detected by the radar apparatus 10.
  • the radar communication pulse generation unit 155 when the function notification pulse detection unit 152 detects the function notification pulse W 212, the radar communication pulse generation unit 155 generates a radar communication pulse W 12 to be transmitted to the racon 20. To do. If it is such a structure, the radar apparatus 10 will transmit the radar communication pulse W12 to the racon 20 which has a communication function, and will not transmit the radar communication pulse W12 to the racon which does not have a communication function. Therefore, even when the radar apparatus 10 detects the racon, the radar apparatus 10 does not shift to the communication operation unless the racon 20 having the communication function is detected. Therefore, the radar apparatus 10 can suppress unnecessary communication operation, and can perform detection operation accordingly. Therefore, it is possible to continue to detect the target around the radar apparatus 10 more reliably.
  • the embodiment in which the Morse pulse frequency and the function notification pulse frequency are different values has been mainly described.
  • the Morse pulse frequency and the function notification pulse frequency may be the same.
  • phase modulation is suitable as a modulation method. This is because, if the modulation method in this case is amplitude modulation, unnecessary light and darkness occurs in the Morse code image on the PPI screen for the same reason as described above.
  • the Morse pulse and the function notification pulse are generated at the same frequency by phase modulation, the Morse pulse and the function notification pulse can be realized by the same pulse.
  • the function notification pulse itself is a pulse displayed as a Morse code image on the PPI screen.
  • the echo signal having the same frequency as the frequency of the function notification pulse is superimposed on the function notification pulse, the detection accuracy of the function notification pulse may be slightly lowered.
  • a racon communication pulse may be superimposed on the function notification pulse.
  • the function notification pulse is a pulse for notifying that the racon has a communication function, but this need not be the case.
  • the function notification pulse may be used to notify the radar apparatus of the function.
  • the racon is described as an example of the transponder device of the present invention. However, this need not be the case.
  • the present invention may be applied to a transponder device other than a racon.
  • Radar equipment (communication equipment) DESCRIPTION OF SYMBOLS 11 Antenna part 15 (Radar apparatus) Signal processing apparatus 20 Racon (transponder apparatus) 21 Antenna unit 25 (transponder unit) signal processing unit (communication unit) 151 Image data generation unit (signal processing unit) 152 Function notification pulse detector (detector) 155 Radar communication pulse generator (communication data generator) 156 Radar detection pulse generator (detection signal generator) 253a Morse pulse generator (response signal generator) 253b Function notification pulse generator (function notification signal generator) 256 Racon communication pulse generator (communication data generator) G2 Image data M2 Icon W11 Radar detection pulse (transmission signal, detection signal) W211 Morse pulse (response signal) W212 Function notification pulse (Function notification signal)

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

L'invention vise à rendre possible de communiquer une fonction d'un dispositif transpondeur. A cet effet, l'invention porte sur un dispositif de traitement du signal (25) disposé dans un dispositif transpondeur (20) pour délivrer en sortie un signal de réponse prescrit en réponse à la réception d'un signal d'émission prescrit, lequel dispositif comporte une unité de génération de signal de réponse (253a) et une unité de génération de signal de notification de fonction (253b). L'unité de génération de signal de réponse (253a) est configurée de façon à générer le signal de réponse. L'unité de génération de signal de notification de fonction (253b) est configurée de façon à générer un signal de notification de fonction pour communiquer une fonction du dispositif transpondeur (20).
PCT/JP2015/064262 2014-06-26 2015-05-19 Dispositif de traitement du signal, dispositif transpondeur, dispositif radar, et procédé de traitement du signal WO2015198753A1 (fr)

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EP4270056A4 (fr) * 2022-03-07 2024-04-03 Shanghai Navar Science and Technology Co. Ltd. Système de transpondeur radar de type à transfert direct à large bande numérique complète et son procédé de fonctionnement

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