WO2014125960A1 - Dispositif de traitement de signal et procédé de traitement de signal - Google Patents

Dispositif de traitement de signal et procédé de traitement de signal Download PDF

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Publication number
WO2014125960A1
WO2014125960A1 PCT/JP2014/052500 JP2014052500W WO2014125960A1 WO 2014125960 A1 WO2014125960 A1 WO 2014125960A1 JP 2014052500 W JP2014052500 W JP 2014052500W WO 2014125960 A1 WO2014125960 A1 WO 2014125960A1
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WIPO (PCT)
Prior art keywords
radar
communication
signal
detection
racon
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PCT/JP2014/052500
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English (en)
Japanese (ja)
Inventor
潤 山林
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古野電気株式会社
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Publication of WO2014125960A1 publication Critical patent/WO2014125960A1/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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/04—Display arrangements
    • G01S7/06—Cathode-ray tube displays or other two dimensional or three-dimensional displays
    • G01S7/10—Providing two-dimensional and co-ordinated display of distance and direction
    • G01S7/12—Plan-position indicators, i.e. P.P.I.
    • 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
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/06—Systems determining position data of a target
    • G01S13/42—Simultaneous measurement of distance and other co-ordinates
    • 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
    • G01S13/87—Combinations of radar systems, e.g. primary radar and secondary radar
    • 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
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/91—Radar or analogous systems specially adapted for specific applications for traffic control

Definitions

  • the present invention relates to a signal processing device provided in a radar device and a signal processing method in the radar device.
  • Patent Documents 1 and 2 disclose a configuration in which information held by a radar device is transmitted using a pulse signal.
  • the radar beacon 102 is referred to as a racon 102.
  • the racon 102 is disposed in the vicinity of the land 104.
  • the radar apparatus 100 communicates with the racon 102 in the communication range 106.
  • the communication range 106 is a fan-shaped range centering on the antenna unit 105 of the radar apparatus 100. In this case, in the communication range 106, the radar apparatus 100 does not transmit a pulse signal for detection, and thus does not detect a target.
  • echo images are not displayed on the PPI screen 107 of the radar apparatus 100 for the racon 102, the other ship 103, and the land 104 existing in the communication range 106. More specifically, the echo image of the racon 102 is not seen at all, and the echo image P103 of the other ship 103 and the echo image P104 of the land 104 are lacking in the communication range 106. Therefore, the operator of the radar apparatus 100 cannot recognize the target in the communication range 106 on the PPI screen 107.
  • the present invention has an object to provide a signal processing device and a signal processing method capable of displaying a detection result even in an area where data transmission is performed in view of the above situation.
  • a signal processing device is a signal processing device provided in a radar device.
  • the signal processing device includes a detection signal generation unit, a communication signal generation unit, a communication range detection unit, and an image data generation unit.
  • the detection signal generation unit is configured to transmit a detection signal for detecting a target around the radar device.
  • the communication signal generation unit is configured to transmit a communication signal for communicating with a predetermined communication target.
  • the communication range detection unit is configured to detect a communication range communicating with the communication target in an azimuth direction around the radar device.
  • the image data generation unit is configured to generate image data indicating a detection result using the detection signal.
  • a process for generating the image data indicating the detection result of the communication range is different from a process for generating the image data indicating the detection result outside the communication range.
  • the signal processing device further includes a determination unit that determines which of the detection signal and the communication signal is transmitted.
  • the determination unit makes the transmission interval of the detection signal in the communication range larger than the transmission interval of the detection signal outside the communication range.
  • the determination unit transmits the communication signal when the detection signal is not transmitted in the communication range.
  • the image data generation unit generates the image data indicating a detection result of the communication range using a past detection result.
  • the signal processing device further includes a sweep memory.
  • the sweep memory stores a detection reception signal received after transmission of the detection signal.
  • the image data generation unit can use the detection reception signal stored in the sweep memory as the past detection result.
  • the signal processing device further includes an image memory.
  • the image memory stores image data indicating past detection results as past image data.
  • the image data generation unit uses the past image data as the past detection result.
  • the image data generation unit generates the image data so that display specifying the communication range is performed.
  • the image data generation unit generates the image data so that display specifying the position of the communication target is performed.
  • a signal processing method is a signal processing method in a radar apparatus.
  • the signal processing method includes a detection signal generation step, a communication signal generation step, a communication range detection step, and an image data generation step.
  • a detection signal for detecting a target around the radar apparatus is generated.
  • a communication signal transmitting step a communication signal for communicating with a predetermined communication target is generated.
  • a communication range communicating with the communication target is detected in an azimuth direction around the radar device.
  • image data generation step image data indicating a detection result using the detection signal is generated.
  • the process for generating the image data indicating the detection result of the communication range is different from the process for generating the image data indicating the detection result outside the communication range.
  • the detection result can be displayed even in the area where data transmission is performed.
  • FIG. 1 is a conceptual diagram for explaining the concept of the radar system 1 according to the first embodiment of the present invention.
  • 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 transceiver 10 and a radar beacon (hereinafter referred to as a racon) 20.
  • the radar transceiver 10 is an example of the “radar apparatus” in the present invention.
  • the racon 20 is an example of the “communication target” in the present invention.
  • FIG. 2 is a schematic diagram showing an example of the positional relationship between the radar transceiver 10 and the racon 20.
  • FIG. 2 shows a circular area centering on the radar transceiver 10 (own ship 2).
  • FIG. 3 is a diagram showing a display example of a PPI (Plan Position Indicator) screen 161 of a radar image display 16 to be described later of the radar transceiver 10.
  • FIG. 2 shows a display corresponding to the display content on the PPI screen 161.
  • PPI Plan Position Indicator
  • FIG. 2 shows a state where the racon 20, the other ship 3, and the land 4 are present around the radar transceiver 10 (own ship 2).
  • a radar transceiver 10 is a marine radar provided in a vessel such as a fishing boat.
  • the ship provided with the radar transceiver 10 is referred to as “own ship”.
  • a ship other than own ship 2 is referred to as other ship 3.
  • the radar transceiver 10 is configured to alternately perform transmission of an electromagnetic wave and reception of an echo signal Ec generated by reflecting the emitted electromagnetic wave. More specifically, the radar transceiver 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 detection pulse W11 is a pulse signal for detecting a target around the ship 2.
  • An echo signal Ec is transmitted toward the ship 2 due to the emission of the radar detection pulse W11.
  • the radar transceiver 10 generates image data of an image displayed on the PPI screen 161 using the echo signal Ec.
  • the radar communication pulse W12 is a communication signal for transmitting radar communication information D10 held by the radar transceiver 10 to the racon 20.
  • the radar communication information D10 is, for example, information (a ship's register, ship number, etc.) that identifies the ship 2.
  • the radar communication information D10 may not be information that identifies the ship 2 but may be arbitrary information such as character information, image information, or voice information.
  • the racon 20 is disposed in a narrow channel. In the present embodiment, a case where the ship 2 navigates the gorge channel will be described as an example.
  • the racon 20 transmits the racon response wave W20. That is, the racon 20 is configured to transmit the racon response wave W20 using the radar wave W10 as a trigger.
  • the racon response wave W20 includes a racon notification pulse W21 or a racon communication pulse W22.
  • the racon notification pulse W ⁇ b> 21 is a notification signal for notifying the radar transceiver 10 of the presence of the racon 20.
  • the racon communication pulse W22 is a communication signal for transmitting the racon communication information D20 given to the racon 20 to the radar transceiver 10.
  • the racon communication information D20 is information including at least one of characters, images, and sounds.
  • the racon communication information D20 includes information indicating the position (latitude and longitude) of the racon 20 and weather information of the sea area where the racon 20 is installed. Note that the racon communication information D20 is not limited to the above-described exemplary content, and may be other information.
  • the racon communication information D20 is information that is not intended to be displayed on the PPI screen 161.
  • the radar transceiver 10 receives the antenna reception wave W1 in response to the transmission of the radar wave W10. Specifically, when the radar transceiver 10 transmits a radar detection pulse W11, the antenna reception wave W1 includes an echo signal Ec. The radar transceiver 10 displays an echo image specified by the echo signal Ec on the PPI screen 161. In this case, when the antenna received wave W1 includes the racon notification pulse W21, an image specified by the racon notification pulse W21 is also displayed on the PPI screen 161.
  • FIG. 3 displays a Morse code-like image PD indicating “D” as an image specified by the racon notification pulse W21.
  • the radar transceiver 10 transmits the radar communication pulse W12 toward the racon 20, the antenna reception wave W1 includes the racon communication pulse W22.
  • the radar transceiver 10 displays the racon communication information D20 included in the racon communication pulse W22 on a screen different from the PPI screen 161.
  • FIG. 4 is a block diagram showing the configuration of the racon 20. Next, a specific configuration of the racon 20 will be described. As shown in FIGS. 1 and 4, the racon 20 is provided as a transponder device, and transmits a racon response wave W20 in response to receiving the radar wave W10.
  • the racon 20 includes an antenna unit 21, a circulator 22, a receiver 23, a transmitter 24, an information transmission / reception processing unit 25, a racon communication information memory 26, and a reception information memory 27.
  • 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 transmits a racon response wave W20 output from the transmitter 24 via the circulator 22.
  • the antenna unit 21 is used to transmit and receive electromagnetic waves, but this need not be the case.
  • the electromagnetic wave transmitting antenna unit and the electromagnetic wave receiving antenna unit may be separate.
  • the circulator 22 is a three-port circulator to which the antenna unit 21, the receiver 23, and the transmitter 24 are connected.
  • the circulator 22 transmits the radar wave W10 received by the antenna unit 21 to the receiver 23. Further, the circulator 22 transmits the racon response wave W20 output from the transmitter 24 to the antenna unit 21.
  • the receiver 23 amplifies the radar wave W10 output from the circulator 22 and outputs it to the information transmission / reception processing unit 25.
  • the transmitter 24 upconverts and amplifies the racon response wave W20 generated by the information transmission / reception processor 25 to a predetermined RF frequency band.
  • the transmitter 24 outputs the racon response wave W20 to the circulator 22 at the timing indicated by the transmission trigger Tg generated by the information transmission / reception processing unit 25. Accordingly, the transmitter 24 transmits the racon response wave W20 toward the antenna unit 11 of the radar transceiver 10.
  • the information transmission / reception processing unit 25 When receiving the radar wave W10 from the radar transceiver 10, the information transmission / reception processing unit 25 is configured to generate a racon response wave W20 corresponding to the radar wave W10 and to perform transmission processing of the racon response wave W20. Has been.
  • the information transmission / reception processing unit 25 is configured using a CPU, a RAM, a ROM (not shown), and the like.
  • the information transmission / reception processing unit 25 includes a demodulation processing unit 251, a transmission information setting unit 252, a pulse waveform generation unit 253, and a transmission timing setting unit 254.
  • the demodulation processing unit 251 is connected to the receiver 23 and receives the radar wave W10 from the receiver 23.
  • the demodulation processing unit 251 demodulates the radar communication pulse W12 using a demodulation method corresponding to the modulation method of the radar transceiver 10.
  • the demodulation processing unit 251 acquires the signal sequence of the radar communication information D10 by the demodulation process of the radar communication pulse W12.
  • the demodulation processing unit 251 outputs the radar communication information D10 to the transmission information setting unit 252.
  • the demodulation processing unit 251 outputs the demodulation processing result of the radar detection pulse W11 to the transmission information setting unit 252.
  • the transmission information setting unit 252 sets a predetermined signal sequence based on the processing result of the demodulation processing unit 251. Specifically, when the demodulation processing unit 251 outputs the signal sequence of the radar communication information D10, the transmission information setting unit 252 reads the racon communication information D20 from the racon communication information memory 26. Then, transmission information setting section 252 generates a signal sequence of racon communication information D21.
  • the signal sequence of the racon communication information D21 is a signal sequence obtained by adding an additional signal sequence to the signal sequence of the racon communication information D20.
  • the additional signal sequence includes a signal sequence as a preamble for the radar transceiver 10 to detect and synchronize the racon response wave W20, and a signal sequence for specifying a code for error detection / error correction.
  • Each of the signal sequence and the additional signal sequence of the racon communication information D20 is a binary code string indicating the information as binary values of “0” and “1”.
  • the transmission information setting unit 252 when the demodulation processing unit 251 outputs the demodulation processing result of the radar detection pulse W11, the transmission information setting unit 252 generates a signal sequence of the racon notification pulse W21.
  • the pulse waveform generation unit 253 modulates the signal series set by the transmission information setting unit 252 by a predetermined method. As a result, the pulse waveform generator 253 generates the racon response wave W20 (the racon detection pulse W21 or the racon communication pulse W22).
  • the racon communication pulse W22 includes racon communication information D20.
  • ASK Amplitude Shift Keying
  • FSK Frequency Shift Keying
  • PSK Phase Shift Keying
  • the timing at which the transmitter 24 outputs the racon response wave W20 is set by the transmission timing setting unit 254.
  • the transmission timing setting unit 254 detects the falling edge or the rising edge of the radar wave W10.
  • the transmission timing setting unit 254 generates a transmission trigger Tg of the racon response wave W20 after a predetermined period has elapsed since the detection of the edge.
  • the transmission timing setting unit 254 outputs this transmission trigger Tg to the transmitter 24.
  • this transmission trigger Tg is given, the transmitter 24 outputs a racon response wave W20 to the antenna 21 via the circulator 22.
  • the racon communication information memory 26 is a storage unit provided in the racon 20, and is formed by using, for example, a nonvolatile memory such as a ROM or a flash memory.
  • the racon communication information memory 26 may be provided as one component of the racon 20 or may be provided as an element different from the racon 20.
  • the reception information memory 27 is a storage unit provided in the racon 20 and is formed by using, for example, a nonvolatile memory such as a ROM or a flash memory.
  • the reception information memory 27 may be provided as one component of the racon 20 or may be provided as an element different from the racon 20.
  • the reception information memory 27 stores the demodulation processing result of the demodulation processing unit 251.
  • the racon 20 can store the radar communication information D10.
  • the radar communication information D10 is used as, for example, a ship navigation history.
  • FIG. 5 is a block diagram showing the configuration of the radar transceiver 10.
  • the radar transceiver 10 includes an antenna unit 11, a circulator 12, a transmitter 13, a receiver 14, a signal processing unit 15, a radar image display 16, and communication.
  • An information display 17 and a radar communication information memory 18 are provided.
  • the antenna unit 11 is configured to perform transmission of electromagnetic waves and reception of electromagnetic waves. Specifically, the antenna unit 11 outputs a radar wave W10 output 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 unit 11 transmits the radar wave W10 to the 360 degrees around the ship 2 while receiving the antenna reception wave W1 while rotating around the vertical axis.
  • the operation from the transmission of the radar wave W10 to the transmission of the next pulsed radio wave is referred to as “sweep”.
  • the operation of rotating the antenna unit 11 360 ° while transmitting / receiving radio waves is referred to as “scan”.
  • the antenna reception wave W1 received after the transmission includes the echo signal Ec.
  • the echo signal Ec is a reflected wave generated by the transmission of the radar detection pulse W11.
  • the racon 20 transmits the racon notification pulse W21. Therefore, in this case, the antenna reception wave W1 includes the racon notification pulse W21 in addition to the echo signal Ec.
  • the echo signal Ec and the racon notification pulse W21 are collectively referred to as a detection reception signal R (k).
  • the detection reception signal R (k) is a signal received by the antenna unit 11 after the antenna unit 11 transmits the radar detection pulse W11.
  • the time k indicates the time when the detection reception signal R (k) is received.
  • the radar transceiver 10 transmits the radar communication pulse W12 toward the racon 20, the received antenna reception wave W1 includes the racon communication pulse W22 but does not include the echo signal Ec.
  • the antenna unit 11 is used to perform a transmission operation and a reception operation.
  • the electromagnetic wave transmitting antenna unit and the electromagnetic wave receiving antenna unit may be separate.
  • the circulator 12 is a three-port circulator to which the antenna unit 11, the transmitter 13, and the receiver 14 are connected.
  • the circulator 12 transmits the radar wave W10 output from the transmitter 13 to the antenna unit 11. Further, the circulator 12 transmits the antenna reception wave W ⁇ b> 1 received by the antenna unit 11 to the receiver 14.
  • 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 unit 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 outputs the amplified antenna reception wave W ⁇ b> 1 to the signal processing unit 15.
  • the signal processing unit 15 is an example of the “signal processing device” in the present invention.
  • the signal processing unit 15 is configured to generate a radar wave W10. Further, the signal processing unit 15 generates the pixel data Y k [i, j] of the image to be displayed on the radar image display 16 and the racon communication information to be displayed on the communication information display 17 based on the antenna reception wave W1. D20 is extracted.
  • the signal processing unit 15 includes a sweep memory 151, an image data generation unit 152, a demodulation processing unit 153, a determination unit 154, a radar communication information setting unit 155, a radar communication pulse generation unit 156, and a radar detection pulse generation unit. 157 and a transmission waveform switching unit 158.
  • the sweep memory 151 is configured to store the detection reception signal R (k) received by the receiver 14.
  • the detection reception signal R (k) is a reception signal of R- ⁇ system coordinates. The position corresponding to the detection reception signal R (k) is indicated by polar coordinates shown in FIG. 2 where the position from the antenna unit 11 (own ship 2) is the distance r and the angle about the antenna unit 11 is the antenna angle ⁇ . Identified.
  • the sweep memory 151 stores the latest detection reception signal R (k) or the detection reception signal R (k ⁇ 1) of the past for one sweep.
  • the reception signal R (k ⁇ 1) for past detection for one sweep is an example of the “past detection result” of the present invention.
  • the detection reception signals R (k) and R (k ⁇ 1) are collectively referred to as detection reception signals R (K).
  • FIG. 6 is a flowchart for explaining an example of the operation of the sweep memory 151.
  • the sweep memory 151 determines whether or not the radar wave W10 transmitted at the most recent time is a detector detection pulse W11 (step S101). Specifically, the sweep memory 151 determines whether or not a command signal CM (described later) output from the determination unit 154 is a command for transmitting the radar detection pulse W11.
  • CM command signal
  • the sweep memory 151 stores the detection reception signal R (k) from the receiver 14 (step S102). . That is, the sweep memory 151 updates the detection reception signal R (k).
  • the sweep memory 151 does not store the detection reception signal R (k) from the receiver 14 (Step S101). S103). In this case, the sweep memory 151 does not update the stored contents, and retains the detection reception signal R (k ⁇ 1) that is already held as a past detection result.
  • the detection reception signal R (k) or the detection reception signal R (k ⁇ 1) stored in the sweep memory 151 is supplied to the image data generation unit 152.
  • the image data generation unit 152 is configured to generate image data based on the detection result using the radar detection pulse W11. More specifically, the image data generation unit 152 generates pixel data Y k [i, j] for causing the radar image display 16 to display using the detection reception signal R (K).
  • the pixel data Y k [i, j] is an example of the “image data” in the present invention.
  • the image data generation unit 152 includes a pixel data generation unit 152a and an image memory 152b.
  • the pixel data generation unit 152a determines pixel data G k [i, j] to be written to the image memory 152b based on the detection reception signal R (K).
  • [I, j] indicates coordinates in the XY coordinate system
  • pixel data G k [i, j] indicates a signal level at coordinates specified by [i, j].
  • the pixel data generation unit 152a converts each position specified by the detection reception signal R (K) from the R- ⁇ coordinate system to the XY coordinate system (orthogonal coordinate system).
  • the pixel data generation unit 152a sets the position of the antenna unit 11 as the origin (i 0 , j 0 ).
  • the pixel data generation unit 152a corresponds to the XY coordinate system based on the antenna angle ⁇ and the reading position of the detection reception signal R (K) (corresponding to the distance r from the antenna unit 11).
  • the address (position) is determined.
  • Pixel data G k [i, j] obtained based on one detection reception signal R (K) is pixel data of a region detected by one sweep operation.
  • the pixel data generation unit 152a outputs the pixel data G k [i, j] to the image memory 152b.
  • the image memory 152b stores pixel data G k [i, j] for a plurality of sweeps corresponding to one scan.
  • the image memory 152b performs processing on at least a part of the accumulated pixel data G k [i, j] for one scan. Thereby, each pixel data G k [i, j] is output to the radar image display 16 as pixel data Y k [i, j].
  • the radar image display 16 is configured to display an image specified by the pixel data Y k [i, j].
  • the radar image display 16 is a display device such as a liquid crystal display.
  • the PPI screen 161 of the radar image display 16 is configured to two-dimensionally display the position of the target by scanning lines that rotate on a circular display area.
  • the PPI screen 161 displays the position of own ship 2 as the center. Each pixel of the PPI screen 161 displays a color and gradation according to the received signal level at the corresponding coordinates (i, j). As a result, the echo image P3 of the other ship 3, the echo image P4 of the land 4 and the echo image P20 of the racon 20 are displayed on the PPI screen 161.
  • the radar transceiver 10 is configured to alternatively transmit a radar detection pulse W11 and a radar communication pulse W12. For this reason, the radar transceiver 10 cannot detect the target because it does not transmit the radar detection pulse W11 while transmitting the radar communication pulse W12.
  • pixel data Y k [i, j] is generated when the radar wave W10 can communicate with the racon 20 and when the radar wave W10 cannot communicate with the racon 20.
  • the processing to do is different.
  • the radar detection pulse W11 is also used in the PCA1 corresponding to the communication range CA1 in which the radar transceiver 10 and the racon 20 can communicate on the PPI screen 161. The detection result is displayed. A specific example of such processing will be described later.
  • the communication range CA1 indicates a range in which the radar transceiver 10 and the racon 20 can communicate with each other.
  • the communication range CA1 is a fan-shaped area in plan view.
  • the antenna reception wave W1 is output to the demodulation processing unit 153 in addition to the sweep memory 151.
  • the demodulation processing unit 153 demodulates the racon response wave W20 using a demodulation method corresponding to the modulation method of the racon 20. Thereby, the demodulation process part 153 acquires racon communication information D20.
  • the racon communication information D20 is output to the communication information display 17 and the determination unit 154.
  • the communication information display 17 is a display for displaying the racon communication information D20.
  • the communication information indicator 17 is a display device such as a liquid crystal display.
  • the communication information display 17 and the radar image display 16 are configured separately, but this need not be the case.
  • the communication information display 17 and the radar image display 16 may be configured by a display device having a single display screen.
  • the determination unit 154 is an example of the “communication range detection unit” in the present invention.
  • the determination unit 154 is provided to determine which of the radar detection pulse W11 and the radar communication pulse W12 is to be transmitted.
  • the determination unit 154 performs processing for transmitting the radar detection pulse W11 to the communication range CA1 between transmissions of the radar communication pulse W12. An example of the flow of processing in the determination unit 154 will be described later. Next, a configuration for generating the radar communication pulse W12 will be described.
  • the radar information setting unit 155 is configured to generate a signal sequence of the radar communication information D11.
  • the signal sequence of the radar communication information D11 is a signal sequence obtained by adding an additional signal sequence to the signal sequence of the radar communication information D10 stored in the radar communication information memory 18.
  • the additional signal series includes a signal series as a preamble indicating the radar communication pulse W12, and a signal series for specifying a code for error detection / error correction.
  • the radar communication information setting unit 155 outputs the signal sequence of the radar communication information D11 to the radar communication pulse generation unit 156.
  • the radar communication information memory 18 in which the radar communication information D10 is stored is a storage unit provided in the radar transceiver 10, and is formed by using, for example, a nonvolatile memory such as a ROM or a flash memory.
  • the radar communication information memory 18 may be provided as one component of the radar transceiver 10 or may be provided as an element different from the radar transceiver 10.
  • the radar communication pulse generation unit 156 is an example of the “communication signal generation unit” in the present invention.
  • the radar communication pulse generation unit 156 performs generation processing of the radar communication pulse W12.
  • the radar communication pulse generator 156 modulates the signal sequence of the radar communication information D11 by a predetermined method. Thereby, the radar communication pulse generation unit 156 generates the radar communication pulse W12.
  • the radar communication pulse W12 is an example of the “communication signal for communicating with a communication target” in the present invention.
  • Radar communication pulse W12 is output to transmission waveform switching section 158.
  • the transmission waveform switching unit 158 is connected to the radar detection pulse generation unit 157 in addition to the radar communication pulse generation unit 156.
  • the radar detection pulse generation unit 157 is an example of the “detection signal generation unit” in the present invention.
  • the radar detection pulse generator 157 generates a waveform of the radar detection pulse W11.
  • the radar detection pulse W11 is an example of the “detection signal for detecting a target around the radar device” of the present invention, and generates an echo signal Ec having a sufficiently strong intensity when irradiated on the target. It is a pulse. As a result, the target can be detected using the radar detection pulse W11.
  • the radar communication pulse W12 is a data communication pulse for transmitting the radar communication information D10, and is not a pulse for generating the echo signal Ec when the target is irradiated. That is, the radar communication pulse W12 is not used for detecting a target.
  • the radar detection pulse generation unit 157 transmits the radar detection pulse W11 to the transmission waveform switching unit 158.
  • the transmission waveform switching unit 158 switches between the mode for transmitting the radar detection pulse W11 and the mode for transmitting the radar communication pulse W12 based on the command signal CM from the determination unit 154.
  • the transmission waveform switching unit 158 selects the mode for transmitting the radar detection pulse W11
  • the transmission waveform switching unit 158 outputs the radar detection pulse W11 from the radar detection pulse generation unit 157 to the transmitter 13.
  • the transmission waveform switching unit 158 selects the mode for transmitting the radar communication pulse W12
  • the transmission waveform switching unit 158 outputs the radar communication pulse W12 from the radar communication pulse generation unit 156 to the transmitter 13.
  • FIG. 7 is a flowchart illustrating an example of a processing flow of the determination unit 154.
  • the determination unit 154 determines whether the antenna received wave W1 demodulated by the demodulation processing unit 153 includes the racon response wave W20 (step S201). For example, when the power of the antenna reception wave W1 is less than the predetermined power, the determination unit 154 determines that the racon response wave W20 is not included in the antenna reception wave W1 (NO in step S201).
  • the determination unit 154 determines the presence or absence of the racon response wave W20 depending on whether or not the demodulation processing result in the demodulation processing unit 153 includes a preamble signal sequence indicating the racon response wave W20. Also good. For example, when the demodulation processing unit 153 successfully demodulates the racon response wave W20, the determination unit 154 may determine that the antenna received wave W1 includes the racon response wave W20.
  • the determination unit 154 transmits a signal indicating that the radar detection pulse W11 is transmitted as the command signal CM to the transmission waveform switching unit. It transmits to 158 (step S202).
  • the determination unit 154 determines that the racon response wave W20 is included in the antenna reception wave W1 (YES in step S201). Determination unit 154 treats the range in which racon response wave W20 is detected as communication range CA1. Thus, the determination unit 154 detects the communication range CA1 that communicates with the racon 20 in the azimuth direction C1 by determining whether or not the racon response wave W20 is included in the antenna reception wave W1.
  • the determination unit 154 determines the number of times the radar communication pulse W12 is continuously transmitted (step S203). Specifically, if the radar communication pulse W12 from radar transceiver 10 has been continuously transmitted x 1 time (YES in step S203), the determination unit 154 as a command signal CM, transmits the radar detection pulse W11 The signal is output to the transmission waveform switching unit 158 (step S202). Thereby, the radar transceiver 10 can be switched to the detection mode even while the radar transceiver 10 is in the communication mode.
  • the continuous transmission number of racons communication pulse W22 is is less than x 1 sweep times (NO in step S203), the determination unit 154 as a command signal CM, the signal to be transmitted radar communication pulse W12, transmission waveform switching The data is output to the unit 158 (step S204).
  • the above is an example of processing in the determination unit 154. Next, a state realized by the determination by the determination unit 154 will be described.
  • FIG. 8 is a diagram for explaining the main points of the operation of the radar transceiver 10 and the main points of the operation of the racon 20.
  • the radar transceiver 10 transmits the radar detection pulse W ⁇ b> 11 to the outside of the communication range CA ⁇ b> 1 in the operation of the ⁇ 1 sweep (timing T ⁇ b> 1), the racon 20 The racon response wave W20 is not transmitted. Thereafter, in the operation of the ⁇ 2 sweep, the radar transceiver 10 transmits the radar detection pulse W11 toward the communication range CA1 (timing T2). Thereafter, the radar transceiver 10 starts receiving the detection reception signal R (k) (timing T3).
  • the racon 20 transmits a racon notification pulse W21 to the radar transceiver 10 (timing T4).
  • the racon response wave W20 is received by the radar transceiver 10.
  • the radar transceiver 10 recognizes the presence of the racon 20.
  • radar transceiver 10 transmits a radar communication pulse W12 (timing T5), then starts receiving the racon communication pulse W22 (Step T6).
  • the racon 20 that has received the radar communication pulse W12 acquires the radar communication information D10 by performing demodulation processing on the radar communication pulse W12, and stores the radar communication information D10 in the reception information memory 27.
  • the racon 20 outputs a racon communication pulse W22 in parallel with this storage operation (timing T7).
  • the racon communication pulse W22 is received by the radar transceiver 10, and as a result, the racon communication information D20 is displayed on the communication information display 17.
  • the radar communication pulse W12 is not transmitted continuously x 2 times. Therefore, the radar transceiver 10, the theta 4 sweep th operation, again, sends the radar communication pulse W12 (timing T8). Thereafter, the radar transceiver 10 starts receiving the racon communication pulse W22 (timing T9).
  • the racon 20 that has received the radar communication pulse W12 performs demodulation processing of the radar detection pulse W11, thereby acquiring the radar communication information D10, and stores the radar communication information D10 in the reception information memory 27.
  • the racon 20 outputs a racon communication pulse W22 in parallel with this storage operation (timing T10).
  • the racon communication pulse W22 is received by the radar transceiver 10, and as a result, the racon communication information D20 is displayed on the communication information display 17.
  • radar communications pulse W12 is, x 2 sweeps (2 sweep) is transmitted continuously. Therefore, the determination unit 154 outputs a transmission command of the radar detection pulse W11 to the transmission waveform switching unit 158 as the command signal CM.
  • the radar transceiver 10 theta 5 in sweep th operation, transmits the radar detection pulse W11 (timing T11). Thereafter, the radar transceiver 10 starts receiving the detection reception signal R (k) (timing T12).
  • the operation from timing T2 to timing T11 is repeated while reaching the racon 20. That is, the operation from timing T11 to T20 is the same as the operation from timing T2 to timing T11.
  • the radar transceiver 10 After timing T20, when the radar wave W10 does not reach the communication range CA1 with the rotation of the antenna unit 11, the radar transceiver 10 repeats transmission of the radar detection pulse W11. When the radar wave W10 reaches the communication range CA1 again with the rotation of the antenna unit 11, the processes at timings T2 to T11 are repeated.
  • the radar detection pulse W11 is transmitted between the time when the radar communication pulse W12 is repeatedly transmitted. 2, 3, and 5, with the above-described configuration, on PPI screen 161, display without a sense of incongruity is performed between range PCA ⁇ b> 1 corresponding to communication range CA ⁇ b> 1 and other ranges.
  • the outside of the range PCA1 corresponding to outside the communication range CA1 shows a detection result obtained by transmitting the radar detection pulse W11 at the same azimuth interval as the resolution of the radar transceiver 10. .
  • the echo image P3 of the other ship 3 and the echo image P4 of the land 4 are displayed as images continuous in the azimuth direction C1.
  • a range PCA1 corresponding to the communication range CA1 indicates a detection result when the radar detection pulse W11 is transmitted at an azimuth interval three times the resolution of the radar transceiver 10.
  • the image of the direction in which the radar communication pulse W12 is transmitted is displayed on the PPI screen 161 using the detection result by the transmission of the latest radar detection pulse W11. Is done.
  • the range PCA1 corresponding to the communication range CA1 the lack of images due to the fact that the radar detection pulse W11 is not transmitted is compensated.
  • the signal processing unit 15 of the present embodiment has a configuration for indicating that the echo image display processing related to the range PCA1 corresponding to the communication range CA1 is different from the echo image display processing related to other than the range PCA1. is doing.
  • the determination unit 154 specifies a range in which the racon response wave W20 is detected in the azimuth direction C1 by referring to the command signal CM generated by itself.
  • the determination unit 154 outputs a command signal CM for changing the contour of the pixel region corresponding to this range as indicated by a broken line to the image memory 152b.
  • the image memory 152b changes the corresponding pixel data G k [i, j] in the image memory 152b as instructed.
  • the pixel data after this change processing is performed is output as pixel data Y k [i, j].
  • the outline of the communication range CA1 is indicated by a dotted line.
  • the radar communication pulse W12 is transmitted in the communication range CA1. Then, while the radar communication pulse W12 is being transmitted, the radar detection pulse W11 is not transmitted. For this reason, the target is not detected in the area where the radar detection pulse W11 is not transmitted in the communication range CA1.
  • the pixel data Y k [i, j] indicating the detection result of the communication range CA1 and process for generating, pixel data indicating the communication range CA1 outside of the detection results Y k [i, j] This is different from the process for generating.
  • the pixel data G k [i, j] indicating the target detection result can be generated by the image data generation unit 152 even in the area where the radar detection pulse W11 is not transmitted in the communication range CA1. It becomes possible. As described above, the detection result using the radar detection pulse W11 can be displayed on the PPI screen 161 for the communication range CA1 in which data communication is performed.
  • the determination unit 154 makes the transmission interval of the radar detection pulse W11 in the communication range CA1 larger than the transmission interval of the radar detection pulse W11 outside the communication range CA1.
  • the determination unit 154 causes the radar communication pulse W12 to be transmitted when the radar detection pulse W11 is not transmitted in the communication range CA1. Thereby, the radar transceiver 10 can detect the target while transmitting the radar communication information D10 in the communication range CA1.
  • the image data generation unit 152 uses the past detection reception signal R (k-1) in addition to the detection reception signal R (k) to detect the communication range CA1. To generate pixel data G k [i, j]. Thereby, the radar transceiver 10 can generate the pixel data G k [i, j] by using the past detection result even in the region where the radar detection pulse W11 is not transmitted.
  • the image data generation unit 152 uses the past detection reception signal R (k ⁇ 1) stored in the sweep memory 151 as the past detection result. That is, the image data generation unit 152 can use the detection reception signal R (k ⁇ 1) as raw data obtained by transmitting the radar detection pulse W11 as a past detection result. . Thereby, the image data generation unit 152 can generate more accurate pixel data Y k [i, j]. As a result, the image data generation unit 152 can generate pixel data Y k [i, j] that can more accurately display the target detection result in the communication range CA1 on the PPI screen 161.
  • the image data generation unit 152 generates pixel data G k [i, j] that can be displayed to specify the communication range CA1. Thereby, the operator who has seen the PPI screen 161 can recognize the communication range CA1. As a result, it is possible to notify the operator of the radar transceiver 10 that the detection result of the communication range CA1 and the detection result outside the communication range CA1 are displayed on the PPI screen 161 through different image processing.
  • the image data generation unit 152 generates the pixel data Y k [i, j] so that display for specifying the position of the racon 20 is performed.
  • the operator who sees the display on the PPI screen 161 can know the position of the racon 20. That is, the echo image P20 of the racon 20 as a target within the communication range CA1 to which the radar communication pulse W12 is transmitted can be displayed on the PPI screen 161.
  • the second embodiment of the present invention is different from the first embodiment in the processing in the sweep memory 151, the processing in the selection unit 154, and the processing in the image memory 152b. This will be specifically described below.
  • the sweep memory 151 holds only the reception signal R (k) for detection in the latest sweep operation regardless of whether or not the radar wave W1 transmitted from the radar transceiver 10 is the radar detection pulse W11.
  • FIG. 9 is a flowchart for explaining an example of a processing flow in the determination unit 154 according to the second embodiment of the present invention.
  • the determination unit 154 performs the process shown in FIG. 9 for each sweep operation. As shown in FIGS. 5 and 9, the determination unit 154 first determines whether or not the antenna received wave W1 received by the receiver 14 includes the racon communication pulse W22 (step 301). The determination unit 154 determines the presence or absence of the racon communication pulse W22 based on, for example, whether or not a preamble indicating the racon communication pulse W22 is included.
  • the determination unit 154 transmits a signal indicating that the radar detection pulse W11 is transmitted in the same direction at the next scan as the command signal CM.
  • the waveform is transmitted to the transmission waveform switching unit 158 (step S302).
  • determining unit 154 determines that racon communication pulse W22 is included in antenna reception wave W1 (YES in step S301)
  • racon communication pulse W22 continues in the direction in which racon communication pulse W22 is received.
  • the number of times of transmission is determined (step S303).
  • the radar transceiver 10 can be switched to the detection mode even while the radar transceiver 10 is in the communication mode.
  • step S301 the continuous transmission number of racons communication pulse W22 is is less than 2 times x (NO in step S303), determination unit 154, as a command signal CM, A signal for transmitting the radar communication pulse W12 in the same direction at the next scan is output to the transmission waveform switching unit 158 (step S304).
  • the above is an example of the flow of processing in the determination unit 154 according to the second embodiment of the present invention. Next, a state realized by the determination by the determination unit 154 will be described.
  • FIG. 10 is a diagram for explaining the main points of the operation of the radar transceiver 10 and the main points of the operation of the racon 20 in the second embodiment of the present invention.
  • FIG. 10 shows the operation of the radar transceiver 10 and the operation of the racon 20 at each of the N-2 scan time, the N-1 scan time, and the N scan time.
  • the radar transceiver 10 As shown in FIGS. 5, 9 and 10, the N-2 scan time, the radar transceiver 10, the operation of the theta 1 sweep th transmitting the radar detection pulse W11. However, in this ⁇ 1 sweep, the radar wave W10 is not received by the racon 20, and the racon response wave W20 is not transmitted to the radar transceiver 10.
  • the radar transceiver 10 transmits the radar detection pulse W11 again at the ⁇ 2 sweep, the radar detection pulse W11 is received by the racon 20. As a result, the racon 20 transmits a racon notification pulse W21 to the radar transceiver 10.
  • the radar detection pulse W11 is transmitted during the ⁇ 2 sweep operation at the next N ⁇ 1 scan (step S302). .
  • the radar detection pulse W11 is transmitted during the ⁇ 2 sweep operation.
  • the operation in the theta 3 sweeps.
  • N-2 scan time when the theta 3 sweep operation, by radar communication pulse W12 is transmitted, racon communication pulse W22 are transmitted.
  • the number of transmissions racons communication pulse W22 in theta 3 sweep operation time is still once (NO at step S303). Therefore, the radar transceiver 10, when the theta 3 sweep operation in the next N-1 scan time, transmits radar communication pulse W12 (step S304).
  • the racon communication pulse W22 is transmitted from the racon 20 during the ⁇ 3 sweep operation at the N-1 scan time.
  • the radar transceiver 10 the continuous reception times of racon communication pulse W22 in theta 3 sweep operation time reaches the second time (YES in step S303). Therefore, the radar transceiver 10 transmits the radar detection pulse W11 during the next N scan operation (step S302).
  • Both the ⁇ 4 sweep operation and the ⁇ 5 sweep operation are the same as the operations in the ⁇ 3 sweep operation.
  • the radar transceiver 10 receives the racon notification pulse W21 and then transmits the radar communication pulse W12 during each sweep operation of ⁇ 3 , ⁇ 4 , ⁇ 5 in the communication range CA1. repeat.
  • the radar transceiver 10 receives the racon notification pulse W21 and then transmits the radar communication pulse W12 during each sweep operation of ⁇ 3 , ⁇ 4 , ⁇ 5 in the communication range CA1. repeat.
  • the radar transceiver 10 repeats the transmission of the radar detection pulse W11 even though it receives the racon notification pulse W21 from the racon 20.
  • the operation at the N-2 scan time, the operation at the N-1 scan time, and the operation at the N scan time are repeatedly performed.
  • the image memory 152b stores pixel data Y k ⁇ 1 [i, j] at the time point before one scan.
  • the pixel data Y k ⁇ 1 [i, j] is an example of “past image data indicating a past detection result” in the present invention.
  • the image memory 152b scans for each pixel using the pixel data G k [i, j] generated by the pixel data generation unit 152a and the past corresponding pixel data Y k ⁇ 1 [i, j]. Perform correlation processing. Specifically, the level Y k [i, j] of the pixel data output from the image memory 152b is obtained by the following calculation.
  • Y k [i, j] ⁇ ⁇ Y k ⁇ 1 [i, j] + ⁇ ⁇ G k [i, j]
  • ⁇ and ⁇ are predetermined weighting coefficients, respectively.
  • the blending ratio between the past pixel data Y k ⁇ 1 [i, j] and the latest pixel data G k [i, j] is determined by the weighting coefficients ⁇ and ⁇ .
  • the sum of the weighting coefficients ⁇ and ⁇ is set to 1.
  • each pixel data Y k [i, j] is weighted by a case where it is generated along with transmission of the radar detection pulse W11 and a case where it is generated along with transmission of the radar communication pulse W12.
  • the setting values ⁇ and ⁇ are different.
  • FIG. 11 is a flowchart for explaining an example of a processing flow for setting the weighting coefficients ⁇ and ⁇ by the image memory 152b.
  • the image memory 152b reads the determination result in the determination unit 154 (step S401).
  • the image memory 152b determines whether or not the radar detection pulse W11 is transmitted at the latest sweep time (step S402).
  • step S402 the image memory 152b performs weighting so that both the past pixel data Y k-1 [i, j] and the latest pixel data G k [i, j] are reflected.
  • step S402 the radar detection pulse W11 is not transmitted.
  • the detection reception signal R (k) is not input to the sweep memory 151.
  • the echo image P20 of the racon 20 and the like can be displayed on the PPI screen 161 using the past pixel data Y k-1 [i, j] also for the location where the radar communication pulse W12 is transmitted. .
  • the image memory 152b stores pixel data indicating past detection results as past pixel data Y k-1 [i, j]. Further, the image data generation unit 152 uses the past pixel data Y k ⁇ 1 [i, j] as a past detection result using the radar detection pulse W11. The data amount of the pixel data G k [i, j] is small compared to the data amount of the detection reception signal R (k) as raw data. Therefore, the memory capacity required for the radar transceiver 10 can be reduced.
  • the radar transceiver 10 transmits the radar detection pulse W11 in the communication range CA1 while transmitting the radar communication pulse W12. In such a configuration, the transmission speed of the radar communication pulse W12 decreases. However, as a result of the radar detection pulse W11 being transmitted to the communication range CA1, it is possible to detect a target existing within the communication range CA1. On the other hand, in the second embodiment of the present invention, more radar communication pulses W12 can be transmitted in the communication range CA1 at the N-2 scan time and the N-1 scan time. Therefore, the transmission speed of information by the radar transceiver 10 can be further increased.
  • the portion where the radar detection pulse W11 is not transmitted is displayed on the PPI screen 161 using the past pixel data Y k-1 [i, j]. Therefore, there is room for improvement in the accuracy of detection of the presence / absence of a target at a location where the radar detection pulse W11 is not transmitted.
  • FIG. 12 is a block diagram showing a configuration of a radar transceiver 10A according to the third embodiment of the present invention.
  • a radar transceiver 10A includes an antenna unit 11, a circulator 12, a transmitter 13, a receiver 14, a signal processing unit 15A, a radar video display 16, and a communication information display 17. And a radar communication information memory 18.
  • the signal processing unit 15A includes a sweep memory 151, an image data generation unit 152, a demodulation processing unit 153, a determination unit 154, a radar communication information setting unit 155, a radar communication pulse generation unit 156, and a radar detection pulse generation unit. 157, a transmission waveform switching unit 158, and a control unit 159.
  • the control unit 159 is connected to the receiver 14, the determination unit 154, and the pixel data generation unit 152a.
  • FIG. 13 is a flowchart for explaining an example of a process flow in the control unit 159.
  • control unit 159 determines the type of radar wave W10 at the latest time point (step S501).
  • the control unit 159 determines the type of the radar wave W10 by referring to the command signal CM output from the determination unit 154 to the transmission waveform switching unit 158.
  • the control unit 159 reads the latest detection reception signal R (k) stored in the sweep buffer 151 (Ste S502).
  • the control unit 159 stores the past (before one sweep operation) stored in the image memory 152b. Pixel data Y k ⁇ 1 [i, j] is read (step S503).
  • control unit 159 refers to the read detection reception signal R (k) or the pixel data Y k ⁇ 1 [i, j]. Thus, the control unit 159 determines whether or not a target (another ship 3 or the like) exists between the radar transceiver 10A and the racon 20 (step S504). Specifically, the control unit 159 determines whether or not the signal level in the region between the radar transceiver 10A and the racon 20 exceeds a predetermined threshold value.
  • the control unit 159 determines that a target exists between the radar transceiver 10A and the racon 20 (YES in step S504). In this case, the control unit 159 causes the determination unit 154 to set the first processing mode (step S505).
  • the first processing mode is a mode for performing processing similar to the processing in the first embodiment of the present invention. When the first processing mode is set, processing similar to the processing in the flowcharts shown in FIGS. 6 and 7 is performed. Therefore, detailed description of the first processing mode is omitted.
  • the control unit 159 determines that there is no target between the radar transceiver 10A and the racon 20 (NO in step S504). In this case, the control unit 159 causes the determination unit 154 to set the second processing mode (step S506).
  • the second processing mode is a mode for performing processing similar to the processing in the second embodiment of the present invention. When the second processing mode is set, processing similar to the processing in the flowcharts shown in FIGS. 9 and 11 is performed. Therefore, detailed description of the second processing mode is omitted.
  • the radar transceiver 10A of the third embodiment of the present invention when a target such as the other ship 3 exists in the vicinity of the own ship 2, the process in the first processing mode is performed. Thereby, when the target exists in the vicinity of the own ship 2, the radar detection pulse W11 is transmitted toward the communication range CA1 every time the scanning operation is performed. Thereby, the radar transceiver 10A can detect the target in the vicinity of the ship 2 more accurately.
  • the processing in the second processing mode is performed.
  • a radar that can display the echo image P3 of the target existing in the communication range CA1 on the PPI screen 161 and transmit it to the racon 20.
  • More communication pulses W12 can be made. Thereby, the total amount of information that can be transmitted to the racon 20 in one scan operation can be increased.
  • the signal processing unit 15,15A the generated pixel data Y k indicating the detection result of the communication range CA1 [i, j] and generation processing, the pixel data Y k indicating the detection results of the outside communication range CA1 [i, j] What is necessary is just to be comprised so that a process may differ.
  • the image data generation unit 152 uses the past detection result (the detection reception signal R (k ⁇ 1) or the past pixel data Y k ⁇ 1 [i, j]), An example in which pixel data Y k [i, j] indicating the detection result of the communication range CA1 is generated has been described. However, this need not be the case. For example, the image data generation unit 152 may generate the pixel data Y k [i, j] without using the past detection result.
  • the signal processing unit 15 has been described as an example in which the past detection reception signal R (k ⁇ 1) is not used. However, this need not be the case.
  • the past detection reception signal R (k ⁇ 1) may be output from the sweep memory 151 to the image data generation unit 152.
  • the image data generation unit 152 may generate image data of an image without a display that identifies the communication range CA1 (displayed with a broken line in FIG. 3).
  • the radar transceivers 10 and 10A communicate with the racon 20.
  • the radar transceivers 10 and 10 ⁇ / b> A may communicate with a communication target other than the racon 20.
  • the radar transmitter / receiver 10, 10A has been described as an example in which one radar communication information D10 is repeatedly transmitted. However, this need not be the case.
  • the radar transceivers 10 and 10A may transmit different types of radar communication information. In this case, different types of radar communication information may be transmitted in a lump or may be individually transmitted by a plurality of radar communication pulses W12.

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

Abstract

Le problème décrit par la présente invention est de pourvoir à un dispositif de traitement de signal et à un procédé de traitement de signal, des résultats de détection pouvant par là-même être affichés y compris dans des régions dans lesquelles une transmission de données est effectuée. La solution selon l'invention porte sur une unité de traitement de signal (15) dans un émetteur-récepteur radar (10) qui est équipée d'une unité de génération d'impulsions de détection (157) radar, d'une unité de génération d'impulsions de communication (156) radar, d'une unité de détermination (154), et d'une unité de génération de données d'image (152). L'unité de détermination (154) détecte des limites (CA1) de communication à l'intérieur desquelles l'émetteur-récepteur radar (10) peut communiquer avec une balise répondeuse (20). L'unité de génération de données d'image (152) génère des données de pixels (Yk[i,j]) sur la base des résultats de détection obtenus à l'aide des impulsions (W11) de détection radar. Le traitement effectué dans l'unité de traitement de signal (15) en vue de générer des données de pixels (Yk[i,j]) représentant des résultats de détection à l'intérieur des limites (CA1) de communication susmentionnées est différent du traitement effectué dans l'unité de traitement de signal (15) en vue de générer des données de pixels (Yk[i,j]) représentant des résultats de détection hors desdites limites (CA1) de communication.
PCT/JP2014/052500 2013-02-12 2014-02-04 Dispositif de traitement de signal et procédé de traitement de signal WO2014125960A1 (fr)

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CN104749560A (zh) * 2015-04-20 2015-07-01 南京信息工程大学 一种用于船舶导航雷达的数字信号处理机及处理方法
WO2015198753A1 (fr) * 2014-06-26 2015-12-30 古野電気株式会社 Dispositif de traitement du signal, dispositif transpondeur, dispositif radar, et procédé de traitement du signal

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JP2002062349A (ja) * 2000-08-24 2002-02-28 Japan Radio Co Ltd レーダ装置
JP2010008069A (ja) * 2008-06-24 2010-01-14 Japan Radio Co Ltd レーダ情報伝送システム及びそのためのレーダ装置
JP2011128057A (ja) * 2009-12-18 2011-06-30 Mitsubishi Electric Corp レーダ情報表示装置
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JP2002062349A (ja) * 2000-08-24 2002-02-28 Japan Radio Co Ltd レーダ装置
JP2010008069A (ja) * 2008-06-24 2010-01-14 Japan Radio Co Ltd レーダ情報伝送システム及びそのためのレーダ装置
JP2011128057A (ja) * 2009-12-18 2011-06-30 Mitsubishi Electric Corp レーダ情報表示装置
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Publication number Priority date Publication date Assignee Title
WO2015198753A1 (fr) * 2014-06-26 2015-12-30 古野電気株式会社 Dispositif de traitement du signal, dispositif transpondeur, dispositif radar, et procédé de traitement du signal
CN104749560A (zh) * 2015-04-20 2015-07-01 南京信息工程大学 一种用于船舶导航雷达的数字信号处理机及处理方法

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