WO2020184041A1 - Ｆｍ通信装置、無線通信装置、ｔｄｍａ通信装置、および、ｆｍ通信方法 - Google Patents

Ｆｍ通信装置、無線通信装置、ｔｄｍａ通信装置、および、ｆｍ通信方法 Download PDF

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Publication number
WO2020184041A1
WO2020184041A1 PCT/JP2020/005443 JP2020005443W WO2020184041A1 WO 2020184041 A1 WO2020184041 A1 WO 2020184041A1 JP 2020005443 W JP2020005443 W JP 2020005443W WO 2020184041 A1 WO2020184041 A1 WO 2020184041A1
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Prior art keywords
signal
tdma
communication device
transmission
unit
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PCT/JP2020/005443
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English (en)
French (fr)
Japanese (ja)
Inventor
大希 八本
Original Assignee
古野電気株式会社
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Application filed by 古野電気株式会社 filed Critical 古野電気株式会社
Priority to JP2021505608A priority Critical patent/JP7265615B2/ja
Priority to CN202080018347.2A priority patent/CN113519128B/zh
Publication of WO2020184041A1 publication Critical patent/WO2020184041A1/ja

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    • 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
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • 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
    • H04B1/06—Receivers
    • H04B1/16—Circuits

Definitions

  • the present invention relates to a wireless communication device that realizes TDMA communication such as AIS and FM communication such as VHF communication with a common antenna, and an FM communication device that constitutes a wireless communication device and performs FM communication.
  • a wireless communication device that realizes TDMA communication such as AIS and FM communication such as VHF communication with a common antenna
  • FM communication device that constitutes a wireless communication device and performs FM communication.
  • Patent Document 1 describes a wireless communication device.
  • the wireless communication device described in Patent Document 1 performs VHF communication and AIS communication.
  • the frequency band of VHF communication and the frequency band of AIS communication overlap. Therefore, VHF communication and AIS communication are performed by one antenna.
  • the VHF receiving unit and the AIS communication unit are connected to the antenna via a splitter.
  • the splitter receives a VHF radio signal, it connects the VHF receiver to the antenna.
  • the splitter connects the AIS communication unit and the antenna when performing AIS communication.
  • AIS communication adopts the TDMA (Time Division Multiple Access) method. Therefore, the AIS communication unit transmits the AIS signal at the transmission time. During the transmission of the AIS signal, the connection between the VHF receiver and the antenna is disconnected. That is, the conventional wireless communication device as described in Patent Document 1 does not output a wireless signal to the VHF receiving unit during AIS communication.
  • TDMA Time Division Multiple Access
  • VHF receiving unit uses the FM demodulation method, noise is generated when the radio signal is not input and the level of the input signal drops sharply.
  • an object of the present invention is to provide a technique for suppressing noise generated in FM demodulation during transmission of the TDMA method.
  • the FM communication device of the present invention includes an FM demodulation unit, a TDMA transmission detection unit, and an output sound control unit.
  • the FM demodulation unit demodulates the FM communication signal received by the antenna capable of receiving the TDMA signal and the FM communication signal having overlapping frequency bands.
  • the TDMA transmission detection unit detects that the TDMA signal is being transmitted.
  • the output sound control unit controls the output sound from the FM demodulation unit during transmission of the TDMA signal by using the detection result of the TDMA transmission detection unit.
  • noise generated in FM demodulation during TDMA transmission can be suppressed.
  • FIG. 1st Embodiment It is a functional block diagram which shows the structure of the wireless communication apparatus which concerns on 1st Embodiment.
  • (A) and (B) are diagrams showing the first aspect of the change of the output sound.
  • It is a flowchart which shows one aspect of the communication method of a VHF radio signal.
  • It is a functional block diagram which shows the structure of the wireless communication apparatus which concerns on 2nd Embodiment.
  • It is a flowchart which shows one aspect of the communication method of a VHF radio signal.
  • FIG. 1 is a functional block diagram showing a configuration of a wireless communication device according to the first embodiment.
  • the wireless communication device 10 includes an antenna 100, a VHF splitter 20, a VHF radio 30, and an AIS transponder 40.
  • the VHF splitter 20 corresponds to the "splitter” of the present invention.
  • the VHF radio 30 corresponds to the "FM communication device” or “FM communication unit” of the present invention.
  • the AIS transponder 40 corresponds to the "TDMA communication unit” of the present invention.
  • the antenna 100 is connected to the VHF splitter 20.
  • the VHF splitter 20 connects to the VHF radio 30 and the AIS transponder 40.
  • the antenna 100 transmits and receives VHF radio signals and AIS signals.
  • the frequency band of the VHF radio signal and the frequency band of the AIS signal overlap.
  • the AIS transponder 40 transmits and receives AIS signals by the TDMA method.
  • the VHF splitter 20 includes a distributor 21, a switch circuit 22, a demultiplexer 23, and a switching state detection unit 24.
  • the distributor 21 is connected to the antenna 100 and the switch circuit 22.
  • the switch circuit 22 is connected to the duplexer 23 and the AIS transponder 40.
  • the demultiplexer 23 is connected to the VHF radio 30.
  • the switching state detection unit 24 is connected to the switch circuit 22 and the demultiplexer 23.
  • the distributor 21 outputs a radio signal from the antenna 100 to two terminals in the switch circuit 22. These two terminals are terminals connected to the distributor 21. The distributor 21 outputs a radio signal output from one of these two terminals to the antenna 100. Further, the distributor 21 outputs a radio signal output from the other of these two terminals to the antenna 100.
  • the switch circuit 22 cuts off the connection between the distributor 21 and the demultiplexer 23 when transmitting the AIS signal.
  • the switch circuit 22 connects the distributor 21 and the demultiplexer 23 at a time other than the time when the AIS signal is transmitted.
  • the switch circuit 22 cuts off the connection between the distributor 21 and the AIS transponder 40 when transmitting the VHF signal.
  • the switch circuit 22 connects the distributor 21 and the AIS transponder 40 at a time other than the time when the VHF signal is transmitted.
  • the VHF splitter 20 connects the AIS transponder 40 and the antenna 100 when transmitting an AIS signal. Further, when transmitting the AIS signal, the VHF splitter 20 cuts off the connection between the VHF radio 30 and the antenna 100.
  • the VHF splitter 20 when transmitting the VHF signal, the VHF splitter 20 cuts off the connection between the AIS transponder 40 and the antenna 100. Further, when transmitting a VHF signal, the VHF splitter 20 connects the VHF radio 30 and the antenna 100. The VHF splitter 20 connects both the VHF radio 30 and the AIS transponder 40 to the antenna 100 when neither the AIS signal is transmitted nor the VHF signal is transmitted.
  • the switching state detection unit 24 detects the switching state of the switch circuit 22 and outputs the switching state detection signal to the duplexer 23.
  • the switching state detection unit 24 outputs a switching state detection signal if the demultiplexer 23 (VHF radio 30) and the distributor 21 (antenna 100) are not connected. If the demultiplexer 23 (VHF radio 30) and the distributor 21 (antenna 100) are connected, the switching state detection unit 24 stops the output of the switching state detection signal.
  • the switching state detection signal is, for example, a DC voltage signal having a predetermined level (non-zero).
  • the switching state detection signal has a frequency different from that of the VHF radio signal, and is not limited to a DC voltage signal as long as it can be demultiplexed with respect to the VHF radio signal.
  • the demultiplexer 23 combines the signal from the switch circuit 22 side and the signal from the switching state detection unit 24 and outputs the signal to the VHF radio 30. As a result, the demultiplexer 23 outputs the VHF radio signal to the VHF radio 30 at a time other than the time when the AIS signal is transmitted. When transmitting the AIS signal, the demultiplexer 23 outputs the switching state detection signal to the VHF radio 30.
  • the VHF radio 30 includes a demultiplexer 31, an FM demodulation unit 32, an amplifier 33, an AIS transmission detection unit 34, an output sound control unit 35, a variable amplifier 36, and a speaker 37.
  • the AIS transmission detection unit 34 corresponds to the "TDMA transmission detection unit" of the present invention.
  • FIG. 1 shows only the reception function of the VHF radio signal in the VHF radio 30, the VHF radio 30 may have a transmission function unit of the VHF radio signal.
  • the demultiplexer 31 is connected to the demultiplexer 23 of the VHF splitter 20.
  • the demultiplexer 31 is connected to the FM demodulation unit 32 and the AIS transmission detection unit 34.
  • the FM demodulation unit 32 is connected to the input end of the amplifier 33.
  • the output end of the amplifier 33 is connected to the output sound control unit 35.
  • the AIS transmission detection unit 34 is connected to the output sound control unit 35.
  • the output sound control unit 35 is connected to the input terminal of the variable amplifier 36.
  • the output end of the variable amplifier 36 is connected to the speaker 37.
  • the demultiplexer 31 has a filter function.
  • the demultiplexer 31 outputs the VHF radio signal to the FM demodulation unit 32 and does not output it to the AIS transmission detection unit 34.
  • the demultiplexer 31 outputs the switching state detection signal to the AIS transmission detection unit 34, and does not output the switching state detection signal to the FM demodulation unit 32.
  • the FM demodulation unit 32 demodulates the VHF radio signal and outputs it to the amplifier 33.
  • the amplifier 33 amplifies the demodulated signal and outputs it to the output sound control unit 35.
  • the AIS transmission detection unit 34 detects the switching state detection signal, it generates an on signal and outputs it to the output sound control unit 35.
  • the AIS transmission detection unit 34 does not output an on signal unless it detects a switching state detection signal.
  • the on signal is, for example, a DC voltage signal of a predetermined level, and is a signal exceeding the on level of the AND gate 351 described later.
  • the output sound control unit 35 includes an AND gate 351, a switch element 352, a switch element 353, and an attenuator 354.
  • An ENABLE signal is input to the first input terminal of the AND gate 351.
  • the second input terminal of the AND gate 351 is connected to the AIS transmission detection unit 34.
  • the output terminal of the AND gate 351 is connected to the switch element 352 and the switch element 353.
  • the switch element 352 includes a common terminal, a first selection terminal, and a second selection terminal. The switch element 352 selects either the first selection terminal or the second selection terminal and connects to the common terminal.
  • the switch element 353 includes a common terminal, a third selection terminal, and a fourth selection terminal.
  • the switch element 353 selects either the third selection terminal or the fourth selection terminal and connects to the common terminal.
  • the common terminal of the switch element 352 is connected to the output end of the amplifier 33.
  • the first selection terminal of the switch element 352 is connected to the third selection terminal of the switch element 353.
  • the second selection terminal of the switch element 352 is connected to the fourth selection terminal of the switch element 353 via the attenuator 354.
  • the common terminal of the switch element 353 is connected to the input end of the variable amplifier 36.
  • the attenuator 354 is a resistor or the like and suppresses the level of the input signal.
  • the AND gate 351 outputs a switch changeover signal when an on signal from the AIS transmission detection unit 34 is input.
  • the switch element 352 connects the common terminal and the first selection terminal if the switch changeover signal is not input.
  • the switch element 352 connects the common terminal and the second selection terminal if a switch switching signal is input.
  • the switch element 353 connects the common terminal and the third selection terminal if the switch changeover signal is not input.
  • the switch element 353 connects the common terminal and the fourth selection terminal if a switch switching signal is input.
  • the switch element 352 and the switch element 353 are directly connected to each other unless the AIS signal is being transmitted. That is, unless the AIS signal is being transmitted, the output end of the amplifier 33 is connected to the input end of the variable amplifier 36 without going through the attenuator 354.
  • the switch element 352 and the switch element 353 are connected via the attenuator 354 if the AIS signal is being transmitted. That is, if the AIS signal is being transmitted, the output end of the amplifier 33 is connected to the input end of the variable amplifier 36 via the attenuator 354.
  • the variable amplifier 36 amplifies the input signal according to the set gain and outputs it to the speaker 37.
  • the speaker 37 converts the output signal of the variable amplifier 36 into sound and emits the sound.
  • the VHF radio 30 can realize the following effects.
  • the output sound control unit 35 outputs the VHF radio signal without being suppressed by the attenuator 354 unless the AIS signal is being transmitted. On the other hand, if the AIS signal is being transmitted, the output sound control unit 35 suppresses the noise generated by the FM demodulation unit 32 with the attenuator 354 and outputs the noise.
  • FIGS. 2 (A) and 2 (B) are diagrams showing a first aspect of a change in output sound.
  • the VHF radio 30 is FM demodulated from the VHF radio signal during the period during which the AIS signal is not being transmitted (the AIS transmission period in FIG. 2 (B)). Outputs audio at a predetermined level (amplitude). Further, during the transmission of the AIS signal, the VHF radio 30 suppresses and outputs the noise generated by the FM demodulation unit 32. As shown in FIGS. 2 (A) and 2 (B), the noise level (amplitude) is lower than the VHF voice level. On the other hand, in the conventional configuration in which this control is not performed, the noise level is significantly higher than the VHF voice level.
  • the VHF radio 30 can suppress the noise generated when the VHF radio communication is interrupted by the transmission of the AIS signal.
  • the AIS signal is inserted in a time extremely shorter than the time during which the VHF sound is emitted.
  • the maximum transmission period of the AIS signal is 80 msec. Is.
  • the noise interrupted by the VHF voice is jarring.
  • the VHF radio 30 can suppress this jarring noise and can comfortably make a call or the like by VHF voice.
  • each process realized by the VHF radio 30 is realized by a separate functional unit.
  • each of the above-mentioned processes may be programmed and stored, and the arithmetic processing unit may execute this program.
  • the arithmetic processing unit may execute the flowchart shown in FIG.
  • FIG. 3 is a flowchart showing an aspect of a VHF radio signal communication method. Note that FIG. 3 shows the start state in which the VHF radio signal is being received.
  • the arithmetic processing unit receives the VHF radio signal (S11). When the arithmetic processing unit detects the start of transmission of the AIS signal (S12: YES), the arithmetic processing unit suppresses the level of the output sound (S13). The arithmetic processing unit does not suppress the output sound level unless it has detected the start of transmission of the AIS signal (S12: NO).
  • the arithmetic processing unit When the arithmetic processing unit detects the end of transmission of the AIS signal while suppressing the level (S14: YES), it restores the output sound level (S15). Restoring the output sound level is to stop suppressing the output sound level. If the arithmetic processing unit does not detect the end of transmission of the AIS signal (S14: NO), the arithmetic processing unit continues to suppress the output sound level.
  • FIG. 4 is a functional block diagram showing the configuration of the wireless communication device according to the second embodiment.
  • the wireless communication device 10A according to the second embodiment is different from the wireless communication device 10 according to the first embodiment in the configuration of the VHF radio 30A.
  • the basic configuration of the wireless communication device 10A is the same as that of the wireless communication device 10, and the description of the same parts will be omitted.
  • the VHF radio 30A includes a VHF splitter 20A, an FM demodulation unit 32, an amplifier 33, an AIS transmission detection unit 34A, an output sound control unit 35, a variable amplifier 36, and a speaker 37. That is, the VHF radio 30A includes the configuration of the VHF radio 30 and the configuration of the VHF splitter 20 shown in the first embodiment in one housing.
  • the AIS transmission detection unit 34A is connected to the switch circuit 22.
  • the AIS transmission detection unit 34A realizes the functions of the switching state detection unit 24 and the AIS transmission detection unit 34 shown in the first embodiment. More specifically, for example, the AIS transmission detection unit 34A generates an on signal and outputs it to the output sound control unit 35 if the FM demodulation unit 32 and the distributor 21 (antenna 100) are not connected. The AIS transmission detection unit 34A does not output an on signal if the FM demodulation unit 32 and the distributor 21 (antenna 100) are connected.
  • the VHF radio 30A has the same effect as the VHF radio 30 shown in the first embodiment. Then, the wireless communication device 10A can reduce the number of components as compared with the wireless communication device 10 according to the first embodiment.
  • FIG. 5 is a functional block diagram showing a configuration of a wireless communication device according to a third embodiment.
  • the wireless communication device 10B according to the third embodiment is different from the wireless communication device 10 according to the first embodiment in the configuration of the VHF radio 30B.
  • the other configuration of the wireless communication device 10B is the same as that of the wireless communication device 10, and the description of the same parts will be omitted.
  • the VHF radio 30B includes a demultiplexer 31, an AIS transmission detection unit 34, a variable amplifier 36, a speaker 37, a DSP325, an AD conversion unit 381, and a DA conversion unit 382.
  • the demultiplexer 31 is connected to the demultiplexer 23 of the VHF splitter 20.
  • the demultiplexer 31 is connected to the AIS transmission detection unit 34 and the AD conversion unit 381.
  • the AD conversion unit 381 and the AIS transmission detection unit 34 are connected to the DSP 325.
  • the DSP325 is a programmable signal processing circuit.
  • the DSP 325 includes an FM demodulation unit 32B and an output sound control unit 35B.
  • the FM demodulation unit 32B is connected to the AD conversion unit 381.
  • the FM demodulation unit 32B is connected to the output sound control unit 35B.
  • the output sound control unit 35B is connected to the DA conversion unit 382.
  • the DA conversion unit 382 is connected to the input end of the variable amplifier 36.
  • the output end of the variable amplifier 36 outputs to the speaker 37.
  • the AD conversion unit 381 converts a VHF radio signal composed of an analog signal into a digital signal and outputs it to the FM demodulation unit 32B.
  • the FM demodulation unit 32B demodulates the VHF radio signal and outputs it to the output sound control unit 35B.
  • the output sound control unit 35B amplifies and outputs the VHF radio signal if it has not received the on signal from the AIS transmission detection unit 34. That is, the output sound control unit 35B amplifies and outputs the VHF radio signal during the period other than the transmission of the AIS signal.
  • the output sound control unit 35B receives an on-signal from the AIS transmission detection unit 34, the output sound control unit 35B suppresses the noise level output from the FM demodulation unit 32B and outputs the sound.
  • the output sound control unit 35B can replace the noise output from the FM demodulation unit 32B with white noise and output the noise.
  • the level (amplitude) of the white noise is preferably about the same as the amplitude of the VHF radio signal.
  • other audio signals or the like may be used.
  • the other audio signal for example, a pseudo audio signal obtained by filtering white noise, a copy signal of the audio signal immediately before switching, or the like can be adopted.
  • the output sound control unit 35B suppresses the noise of FM demodulation and outputs it, or outputs white noise during the transmission of the AIS signal.
  • the DA conversion unit 382 converts the output signal of the output sound control unit 35B composed of a digital signal into an analog signal and outputs it to the variable amplifier 36.
  • the VHF radio 30B has the same effect as the VHF radio 30.
  • the VHF radio 30B has the same effect as the VHF radio 30 by outputting white noise that is less likely to be offensive to the ears instead of the noise of FM demodulation.
  • FIG. 6 is a diagram showing a second mode of change in output sound.
  • the VHF radio 30B outputs the VHF radio FM demodulated from the VHF radio signal at a predetermined level (amplitude) during a period during which the AIS signal is not being transmitted (AIS transmission period in FIG. 6). Further, during the transmission of the AIS signal, the VHF radio 30B outputs white noise instead of the noise generated by the FM demodulation unit 32. As shown in FIG. 6, the level (amplitude) of white noise is substantially the same as the level of VHF voice.
  • the output sound control unit 35B can execute delay processing.
  • the output sound control unit 35B can guarantee the delay of the start timing of suppression with respect to the noise of FM demodulation. Therefore, the output sound control unit 35B can more reliably output the noise whose level is suppressed.
  • the output sound control unit 35B can guarantee a delay in the start timing of switching to white noise with respect to the noise of FM demodulation. Therefore, the output sound control unit 35B can more reliably output white noise instead of FM demodulation noise.
  • each process realized by the VHF radio 30B is realized by a separate functional unit.
  • each of the above-mentioned processes may be programmed and stored, and the arithmetic processing unit may execute this program.
  • the arithmetic processing unit may execute the flowchart shown in FIG.
  • FIG. 7 is a flowchart showing one aspect of the communication method of the VHF radio signal. Note that FIG. 7 shows a start state in which a VHF radio signal is being received. Further, FIG. 7 shows an embodiment in which FM demodulation noise is replaced with white noise.
  • the arithmetic processing unit receives the VHF radio signal (S11). When the arithmetic processing unit detects the start of transmission of the AIS signal (S12: YES), it replaces it with white noise (S21). If the arithmetic processing unit has not detected the start of transmission of the AIS signal (S12: NO), the arithmetic processing unit does not replace the white noise.
  • the arithmetic processing device When the arithmetic processing device detects the end of transmission of the AIS signal during the replacement with white noise (S14: YES), the arithmetic processing device ends the replacement with white noise (S22). If the arithmetic processing unit does not detect the end of transmission of the AIS signal (S14: NO), the arithmetic processing unit continues the replacement with white noise.
  • FIG. 8 is a functional block diagram showing a configuration of a wireless communication device according to a fourth embodiment.
  • the wireless communication device 10C according to the fourth embodiment is different from the wireless communication device 10 according to the first embodiment in that it has an AIS communication device 400.
  • the basic configuration of the wireless communication device 10C is the same as that of the wireless communication device 10, and the description of the same parts will be omitted.
  • the AIS communication device 400 includes an AIS transponder 40 and a VHF splitter 20. That is, the AIS communication device 400 includes the configuration of the AIS transponder 40 and the VHF splitter 20 shown in the first embodiment in one housing.
  • the wireless communication device 10C has the same effect as the wireless communication device 10 shown in the first embodiment. Then, the wireless communication device 10C can reduce the number of components as compared with the wireless communication device 10 according to the first embodiment.
  • FIG. 9 is a functional block diagram showing the configuration of the wireless communication device according to the fifth embodiment.
  • the wireless communication device 10D according to the fifth embodiment differs from the wireless communication device 10C according to the fourth embodiment in the connection mode of the switching state detection unit 24.
  • Other configurations of the wireless communication device 10D are the same as those of the wireless communication device 10, and the description of the same parts will be omitted.
  • the switching state detection unit 24 When the switching state detection unit 24 detects the AIS transmission signal from the AIS transponder 40, it outputs the switching state detection signal to the duplexer 23. For example, when the switching state detection unit 24 detects that the signal level output from the AIS transponder 40 is equal to or higher than a predetermined level, it detects that the AIS transmission signal is being transmitted. The switching state detection unit 24 does not output the switching state detection signal to the demultiplexer 23 unless the AIS transmission signal is detected from the AIS transponder 40.
  • the wireless communication device 10D has the same effect as the wireless communication device 10C.
  • FIG. 10 is a functional block diagram showing a configuration of a wireless communication device according to a sixth embodiment.
  • the wireless communication device 10E according to the sixth embodiment has the ON signal of the VHF splitter 20E and the AIS transmission detection unit 34E with respect to the wireless communication device 10 according to the first embodiment. It differs in the generation method.
  • Other configurations of the wireless communication device 10E are the same as those of the wireless communication device 10, and the description of the same parts will be omitted.
  • the VHF splitter 20E includes a distributor 21 and a switch circuit 22.
  • the switch circuit 22 is connected to the distributor 21, the AIS transponder 40, and the FM demodulation unit 32 of the VHF radio 30C. That is, the VHF splitter 20E has a configuration in which the demultiplexer 23 and the switching state detection unit 24 are omitted from the VHF splitter 20 according to the first embodiment.
  • the VHF radio 30E has a configuration in which the demultiplexer 31 is omitted from the VHF radio 30 according to the first embodiment.
  • the AIS transmission detection unit 34E is connected to the AIS transponder 40.
  • the AIS transmission detection unit 34E When the AIS transmission signal is input from the AIS transponder 40, the AIS transmission detection unit 34E generates an on signal and outputs it to the output sound control unit 35. For example, when the AIS transmission detection unit 34E detects that the level of the input signal is equal to or higher than a predetermined level, it determines that the AIS transmission signal has been input. The AIS transmission detection unit 34E does not generate an on signal unless an AIS communication signal (transmission signal) is input from the AIS transponder 40.
  • the wireless communication device 10E has the same effect as that of the wireless communication device 10.
  • FIG. 11 is a functional block diagram showing the configuration of the wireless communication device according to the seventh embodiment.
  • the wireless communication device 10F according to the seventh embodiment is different from the wireless communication device 10 according to the first embodiment in that a VHF radio 30F is provided.
  • Other configurations of the wireless communication device 10F are the same as those of the wireless communication device 10, and the description of the same parts will be omitted.
  • the VHF radio 30F includes a demultiplexer 31, an FM demodulation unit 32, an AIS transmission detection unit 34F, a variable amplifier 36, and a speaker 37.
  • the FM demodulation unit 32 is connected to the input end of the variable amplifier 36.
  • the AIS transmission detection unit 34F detects the switching state detection signal, it generates an on signal and outputs it to the variable amplifier 36.
  • the on signal is a signal that reduces the gain of the variable amplifier 36.
  • the AIS transmission detection unit 34F does not generate an on signal unless the switching state detection signal is detected. As a result, the gain of the variable amplifier 36 does not decrease.
  • the VHF radio 30F suppresses FM demodulation noise during AIS transmission and outputs it, and outputs VHF audio at a predetermined level during a period other than AIS transmission. That is, the VHF radio 30F has the same effect as the VHF radio 30 shown in the first embodiment.
  • FIG. 12 is a functional block diagram showing the configuration of the wireless communication device according to the eighth embodiment.
  • Each of the above embodiments shows a wireless communication device that communicates an AIS signal and a VHF radio signal.
  • the AIS signal may be another TDMA signal and the VHF radio signal may be an FM communication signal in another frequency band.
  • the frequency band of the TDMA signal and the frequency band of the VHF radio signal overlap.
  • the basic configuration and processing of the wireless communication device 10G according to the eighth embodiment are the same as those of the wireless communication device 10 according to the first embodiment, and the description of the same parts will be omitted.
  • the wireless communication device 10G includes an antenna 100, a splitter 20G, an FM radio device 30G, and a TDMA communication device 40G.
  • the splitter 20G includes a distributor 21, a switch circuit 22, a demultiplexer 23, and a switching state detection unit 24.
  • the FM radio 30G includes a demultiplexer 31, an FM demodulation unit 32, an amplifier 33, a TDMA communication detection unit 34G, an output sound control unit 35, a variable amplifier 36, and a speaker 37.
  • the TDMA communication device 40G performs the same processing as the AIS transponder 40 according to the first embodiment on the TDMA communication signal.
  • the TDMA communication detection unit 34G performs the same processing as the AIS transmission detection unit 34 according to the first embodiment.
  • the noise at the time of FM demodulation can be suppressed by providing the configuration of the wireless communication device 10G.
  • All processes described herein can be embodied and fully automated by software code modules executed by a computing system that includes one or more computers or processors.
  • the code module can be stored on any type of non-transitory computer-readable medium or other computer storage device. Some or all of the methods may be embodied in dedicated computer hardware.
  • any particular action, event, or function of any of the algorithms described herein may be performed in different sequences and may be added, merged, or excluded altogether. (For example, not all described acts or events are required to execute an algorithm). Further, in certain embodiments, operations or events are performed in parallel rather than sequentially, for example through multithreading, interrupt handling, or through multiple processors or processor cores, or on other parallel architectures. Can be done. In addition, different tasks or processes can be performed by different machines and / or computing systems that can work together.
  • the various exemplary logic blocks and modules described in connection with the embodiments disclosed herein can be implemented or executed by a machine such as a processor.
  • the processor may be a microprocessor, but instead, the processor may be a controller, a microcontroller, or a state machine, or a combination thereof.
  • the processor can include electrical circuitry configured to process computer-executable instructions.
  • the processor comprises an application specific integrated circuit (ASIC), field programmable gate array (FPGA), or other programmable device that performs logical operations without processing computer-executable instructions.
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • a processor may also be a combination of computing devices, such as a combination of digital signal processors (digital signal processors) and microprocessors, multiple microprocessors, one or more microprocessors in combination with DSP cores, or any other thereof. It can be implemented as such a configuration. Although described primarily with respect to digital technology herein, the processor may also include primarily analog elements. For example, some or all of the signal processing algorithms described herein can be implemented by analog circuits or mixed analog and digital circuits. Computing environments include, but are not limited to, any type of computer system that is based on a microprocessor, mainframe computer, digital signal processor, portable computing device, device controller, or computing engine within the device. be able to.
  • conditional languages such as “can,” “can,” “will,” or “possibly” have certain embodiments that include certain features, elements, and / or steps, but other. Embodiments are understood in the context commonly used to convey that they do not include. Thus, such conditional languages are generally any method in which features, elements and / or steps are required for one or more embodiments, or one or more embodiments are these features. It does not mean that the elements and / or steps are included in any particular embodiment or necessarily include logic for determining whether they are performed.
  • a disjunctive language such as the phrase "at least one of X, Y, and Z" is an item, term, etc., any of X, Y, Z, or any combination thereof, unless otherwise specified. Understood in the context commonly used to indicate that it can be (eg X, Y, Z). Thus, such a disjunctive language generally requires at least one of X, at least one of Y, or at least one of Z, each of which has a particular embodiment. Does not mean.
  • Numerals such as “one” should generally be construed to include one or more described items unless specifically stated otherwise.
  • terms such as “one device configured to” are intended to include one or more listed devices.
  • One or more of such enumerated devices can also be collectively configured to perform the described citations.
  • a processor configured to perform A, B, and C below refers to a first processor configured to perform A and a second processor configured to perform B and C.
  • a specific number enumeration of the introduced examples is explicitly enumerated, those skilled in the art will appreciate that such enumeration is typically at least the enumerated number (eg, other modifiers).
  • a mere enumeration of "two enumerations” without the use should be interpreted to mean at least two enumerations, or two or more enumerations).
  • the term “horizontal” as used herein, regardless of its orientation, is a plane parallel to the plane or surface of the floor of the area in which the described system is used, or description. Is defined as the plane in which the method is performed.
  • the term “floor” can be replaced with the terms “ground” or “water surface”.
  • the term “vertical / vertical” refers to the direction perpendicular / vertical to the defined horizon. Terms such as “upper”, “lower”, “lower”, “upper”, “side”, “higher”, “lower”, “upper”, “beyond”, and “lower” are defined for the horizontal plane. ing.
  • connection/coupling includes direct connection and/or connection having an intermediate structure between the two described components.
  • the numbers preceded by terms such as “approximately,” “about,” and “substantially” as used herein include the enumerated numbers, and further. Represents an amount near the stated amount that performs a desired function or achieves a desired result. For example, “approximately,” “about,” and “substantially” mean values less than 10% of the stated values, unless otherwise stated.
  • the features of the embodiments in which terms such as “approximately,” “about,” and “substantially” are previously disclosed perform further desired functions. Or represent a feature that has some variability to achieve the desired result for that feature.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transceivers (AREA)
  • Noise Elimination (AREA)
PCT/JP2020/005443 2019-03-13 2020-02-13 Ｆｍ通信装置、無線通信装置、ｔｄｍａ通信装置、および、ｆｍ通信方法 WO2020184041A1 (ja)

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CN202080018347.2A CN113519128B (zh) 2019-03-13 2020-02-13 Fm通信装置、无线通信装置、tdma通信装置以及fm通信方法

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JPS5510265A (en) * 1978-07-07 1980-01-24 Mitsubishi Electric Corp Fm receiver
JPS585037A (ja) * 1981-06-30 1983-01-12 Pioneer Electronic Corp 交通情報放送受信装置
JPH05122095A (ja) * 1991-10-30 1993-05-18 Nec Ic Microcomput Syst Ltd ノイズ除去システム
JPH11331110A (ja) * 1998-05-19 1999-11-30 Japan Radio Co Ltd Ａｉｓ制御装置
JP2001144675A (ja) * 1999-11-16 2001-05-25 Oki Electric Ind Co Ltd 無線受信装置
JP2006295397A (ja) * 2005-04-07 2006-10-26 Furuno Electric Co Ltd Ｔｄｍａ通信装置
GB2460012A (en) * 2008-02-27 2009-11-18 Srt Marine Technology Ltd Radio transceiver

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Publication number Priority date Publication date Assignee Title
JP2973489B2 (ja) * 1990-08-13 1999-11-08 日本電気株式会社 シグナリング信号処理方式
JPH09162936A (ja) * 1995-12-11 1997-06-20 Nec Corp 周波数オフセット補正機能付き通信装置
JPH1155161A (ja) * 1997-07-29 1999-02-26 Kokusai Electric Co Ltd 携帯端末
WO2007086174A1 (ja) * 2006-01-25 2007-08-02 Mitsubishi Electric Corporation 受信装置
JP2010263430A (ja) * 2009-05-07 2010-11-18 Sanyo Electric Co Ltd 受信装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5510265A (en) * 1978-07-07 1980-01-24 Mitsubishi Electric Corp Fm receiver
JPS585037A (ja) * 1981-06-30 1983-01-12 Pioneer Electronic Corp 交通情報放送受信装置
JPH05122095A (ja) * 1991-10-30 1993-05-18 Nec Ic Microcomput Syst Ltd ノイズ除去システム
JPH11331110A (ja) * 1998-05-19 1999-11-30 Japan Radio Co Ltd Ａｉｓ制御装置
JP2001144675A (ja) * 1999-11-16 2001-05-25 Oki Electric Ind Co Ltd 無線受信装置
JP2006295397A (ja) * 2005-04-07 2006-10-26 Furuno Electric Co Ltd Ｔｄｍａ通信装置
GB2460012A (en) * 2008-02-27 2009-11-18 Srt Marine Technology Ltd Radio transceiver

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CN113519128B (zh) 2023-05-30
JPWO2020184041A1 (enrdf_load_stackoverflow) 2020-09-17

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