WO2020166235A1 - Dispositif de communication radio - Google Patents

Dispositif de communication radio Download PDF

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Publication number
WO2020166235A1
WO2020166235A1 PCT/JP2020/000240 JP2020000240W WO2020166235A1 WO 2020166235 A1 WO2020166235 A1 WO 2020166235A1 JP 2020000240 W JP2020000240 W JP 2020000240W WO 2020166235 A1 WO2020166235 A1 WO 2020166235A1
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WO
WIPO (PCT)
Prior art keywords
communication device
transmission
wireless communication
transmission signal
radio frequency
Prior art date
Application number
PCT/JP2020/000240
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English (en)
Japanese (ja)
Inventor
圭 伊藤
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株式会社日立国際電気
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Publication date
Application filed by 株式会社日立国際電気 filed Critical 株式会社日立国際電気
Priority to JP2020572118A priority Critical patent/JP7132367B2/ja
Publication of WO2020166235A1 publication Critical patent/WO2020166235A1/fr

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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
    • H04B1/02—Transmitters
    • H04B1/04—Circuits

Definitions

  • the header of the transmission packet is embedded with information indicating some model information such as the device ID, and the header is It is common to demodulate/decode and analyze the contents of the header for identification.
  • An object of the present disclosure is to provide a wireless communication device capable of specifying a wireless communication device that transmits a transmission packet without demodulating and decoding.
  • the wireless communication device includes a modulation processing unit that performs a modulation process on transmission data to generate a baseband transmission signal, a band limiting filter that suppresses an out-of-band component with respect to the baseband transmission signal, and the base.
  • a transmission frequency conversion unit that converts the band transmission signal into a radio frequency transmission signal, and a power amplification unit that power-amplifies the radio frequency transmission signal are provided.
  • the wireless communication device is configured to change a rising power characteristic of the wireless frequency transmission signal into a predetermined pattern pre-arranged by the wireless communication device and the network administrator.
  • FIG. 1 is a diagram showing a configuration of a wireless communication device according to the first embodiment.
  • the wireless communication device 100 according to the first embodiment includes a modulation processing unit 101, a band limiting filter 102, a power operation gain selection unit 103, an operation gain multiplier 104, a transmission frequency conversion unit 105, a PA unit 106, and
  • the transmitting unit includes a transmitting antenna 107.
  • the modulation processing unit 101 performs modulation processing on the input transmission bit sequence (baseband signal) by the device, and generates a modulation signal (baseband transmission signal).
  • the band limiting filter 102 suppresses a component outside the band of the transmission signal with respect to the baseband transmission signal generated by the modulation processing unit 101.
  • the transmission frequency conversion unit 105 converts the power operation baseband transmission signal generated by the operation gain multiplier 104 into a radio frequency (radio frequency transmission signal) for transmission.
  • the PA unit 106 power-amplifies the radio frequency transmission signal converted into the radio frequency by the transmission frequency conversion unit 105.
  • the transmission antenna 107 transmits the radio frequency transmission signal amplified by the PA unit 106.
  • FIG. 2 is a diagram showing an example of an operation power gain pattern
  • FIG. 2A is a diagram showing an example of an operation power gain pattern for increasing the gain
  • FIG. 2B is a view showing an example of the operation power gain pattern.
  • FIG. 3 is a diagram showing an example of a rising edge of a power-controlled transmission signal
  • FIG. 3(a) is a diagram corresponding to FIG. 2(a)
  • FIG. 3(b) is a diagram corresponding to FIG. 2(b).
  • FIG. The solid line in FIG. 3 shows the output characteristic of the PA unit 106 without gain operation
  • the broken line shows the output characteristic of the PA unit 106 with gain operation.
  • the power operation gain for operating the transmission startup power characteristic is selected from the model information, and by multiplying the gain, a different transmission startup power characteristic is provided for each wireless communication device. It is possible to identify the wireless communication device that is transmitting by monitoring the power characteristic with RSSI (Receive Signal Strength Indicator).
  • RSSI Receiveive Signal Strength Indicator
  • FIG. 4 is a diagram showing the configuration of the wireless communication device of the second embodiment.
  • 5A is a diagram showing the configuration of the transmission frequency conversion unit of FIG. 1
  • FIG. 5B is a diagram showing the configuration of the variable transmission frequency conversion unit of FIG.
  • the wireless communication device 200 according to the second embodiment includes a transmission unit including a modulation processing unit 101, a band limiting filter 102, a variable transmission frequency conversion unit 205, a PA unit 106, and a transmission antenna 107. Since the modulation processing unit 101, the band limiting filter 102, the PA unit 106, and the transmission antenna 107 are the same as those in the first embodiment, the description will be omitted.
  • the transmission frequency conversion unit 105 outputs the output signal of the band limiting filter 102 (baseband transmission signal, signal of frequency f1) to a radio frequency (fc) defined by a predetermined frequency (f2). ), a mixer (multiplier) 105a for converting into a radio frequency transmission signal, and an oscillator 105b for supplying a predetermined frequency (f2) to the mixer 105a.
  • variable transmission frequency conversion unit 205 offsets the output signal (baseband transmission signal, signal of frequency f1) of the band limiting filter 102 to a predetermined frequency (f2) by offset frequency ( ⁇ f).
  • a mixer (multiplier) 205a for converting into a radio frequency transmission signal of radio frequency (fc+ ⁇ f) by the added frequency (f2+ ⁇ f) and an offset frequency ( ⁇ f) to a predetermined frequency (f2) based on model information.
  • an oscillator 205c that supplies the frequency (f2+ ⁇ f) to the mixer 205b.
  • FIG. 6 is a diagram showing an example of ⁇ f setting.
  • ⁇ f is not fixed depending on the model, but ⁇ f is changed for each packet, as shown in FIG.
  • the pattern in which this ⁇ f changes differs depending on the model, and this is set by the model information. Therefore, the variable transmission frequency conversion unit 205 can change the radio frequency of the radio frequency transmission signal for each packet, and can configure a plurality of radio frequency patterns. It is possible to adapt the model to a specific pattern of radio frequency.
  • the administrator of the wireless communication network by varying the radio frequency in a specific pattern, it is possible for the administrator of the wireless communication network to identify the wireless communication device that is transmitting by monitoring the frequency offset characteristic.
  • FIG. 7 is a diagram showing the configuration of the wireless communication device of the third embodiment.
  • FIG. 8 is a diagram showing the configuration of the variable band limiting filter shown in FIG.
  • the wireless communication device 300 of the third embodiment includes a transmission unit including a modulation processing unit 101, a variable band limiting filter 302, a transmission frequency conversion unit 105, a PA unit 106, and a transmission antenna 107. Since the modulation processing unit 101, the transmission frequency conversion unit 105, the PA unit 106, and the transmission antenna 107 are the same as those in the first embodiment, the description will be omitted.
  • the variable band limiting filter 302 includes a band limiting filter 303 and a filter coefficient generation unit 304.
  • the band limiting filter 303 is, for example, a finite impulse response (FIR) type filter, and includes n delay elements 304a of a z-transform transfer function (z-1), n+1 multipliers 304b, and an adder. And a container 304c.
  • the filter coefficients (k0, k1, k2,..., kn) are input to the n+1 multipliers 304b, respectively.
  • the filter coefficient generation unit 304 is composed of, for example, a memory such as a ROM, and the filter coefficient corresponding to the model information is read and input to the band limiting filter 303.
  • the variable band limiting filter 302 changes the filter coefficient according to the model information to change the in-band characteristic of the transmission signal.
  • FIG. 9 is a diagram showing an example of in-band characteristics of the variable band limiting filter of FIG. 7, FIG. 9(a) is in-band characteristics when the first filter coefficient is set, and FIG. 9(b) is This is an in-band characteristic when the second filter coefficient is set.
  • the horizontal axis represents frequency and the vertical axis represents level.
  • the in-band characteristic of FIG. 9B a characteristic different from that of FIG. 9A appears in a portion surrounded by a broken line circle. In this way, it is possible to change the in-band characteristics by changing the filter coefficient.
  • the in-band characteristics are corrected by equalization processing on the receiving side, or the inverse characteristics are applied in advance during reception to minimize the effect on demodulation processing.
  • FIG. 10 is a diagram showing the configuration of the wireless communication transmitter of the fourth embodiment.
  • the wireless communication device 400 of the fourth embodiment includes a modulation processing unit 101, a variable band limiting filter 302, a power operation gain selection unit 103, an operation gain multiplier 104, a variable transmission frequency conversion unit 205, and a PA unit 106. And a transmitting antenna 107.
  • the modulation processing unit 101, the power operation gain selection unit 103, the operation gain multiplier 104, the PA unit 106, and the transmission antenna 107 are the same as in the first embodiment, and the variable transmission frequency conversion unit 205 is the same as in the second embodiment. Since the variable band limiting filter 302 is the same as that of the third embodiment, its description is omitted.
  • FIG. 11 is a diagram showing the configuration of the wireless communication device of the fifth embodiment.
  • the wireless communication device 500 according to the fifth embodiment includes a modulation processing unit 101, a variable band limiting filter 302, a power operation gain selection unit 103, an operation gain multiplier 104, a variable transmission frequency conversion unit 205, and a PA unit 106. And a transmitting antenna 107 and pseudo random number generators 508a, 508b, 508c.
  • variable band limiting filter 302, the power operation gain selection unit 103, and the variable transmission frequency conversion unit 205 determine the characteristics based on the model information. Pseudo-random numbers generated by the random number generators 508a, 508b, 508c are used. The pseudo random number is made different for each transmission packet, for example. By using pseudo random numbers, each characteristic becomes random.
  • applying the present embodiment causes transmission with different transmission rising characteristics for each transmission packet. It is possible to reduce the identification of the wireless communication device that is in use.
  • the network administrator knows the pseudo random number generation pattern for each wireless communication device, it is possible to specify the wireless communication device that is transmitting as in the first to fourth embodiments.
  • the network administrator It is possible to specify the transmitting wireless communication device based on the change in RSSI without using a receiver having a decoding process.
  • the network administrator can perform reception and demodulation processing. It is possible to specify the transmitting wireless communication device based on the change in frequency offset without using a wireless communication device.
  • the present invention is not limited to the above embodiments, and it goes without saying that various modifications can be made.
  • the example in which the wireless communication device includes the transmission antenna has been described, but the transmission antenna may not be included in the wireless communication device and may be provided outside the wireless communication device.
  • the fourth and fifth embodiments an example in which all of the first to third embodiments are combined has been described, but any two may be combined.
  • the embodiments of the present invention can be used for a wireless communication device and a wireless communication system capable of specifying a wireless communication device without demodulating and decoding a transmission packet.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transmitters (AREA)

Abstract

La présente invention concerne un dispositif de communication radio capable d'identifier un dispositif de communication radio d'émission sans démodulation/décodage d'un paquet d'émission. Ce dispositif de communication radio comprend : une unité de traitement de modulation qui soumet des données d'émission à un traitement de modulation pour générer un signal d'émission de bande de base; un filtre de limitation de bande qui effectue une suppression de composante hors bande par rapport au signal d'émission de bande de base; une unité de conversion de fréquence d'émission qui convertit le signal d'émission de bande de base en un signal d'émission radiofréquence; et une unité d'amplification de puissance qui réalise une amplification de puissance du signal d'émission radiofréquence. Le dispositif de communication radio est configuré pour modifier une caractéristique de puissance montante du signal d'émission radiofréquence en un modèle prédéterminé stipulé à l'avance par le dispositif de communication radio et un administrateur de réseau.
PCT/JP2020/000240 2019-02-14 2020-01-08 Dispositif de communication radio WO2020166235A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2020572118A JP7132367B2 (ja) 2019-02-14 2020-01-08 無線通信装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019-024946 2019-02-14
JP2019024946 2019-02-14

Publications (1)

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WO2020166235A1 true WO2020166235A1 (fr) 2020-08-20

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JP (1) JP7132367B2 (fr)
WO (1) WO2020166235A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09284180A (ja) * 1996-04-19 1997-10-31 Brother Ind Ltd 無線通信システム
JP2008153972A (ja) * 2006-12-18 2008-07-03 Kenwood Corp 無線通信機
WO2017221918A1 (fr) * 2016-06-24 2017-12-28 日本電気株式会社 Dispositif de communication sans fil, système de communication sans fil, procédé de communication sans fil et support d'informations sur lequel est stocké un programme de communication sans fil

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09284180A (ja) * 1996-04-19 1997-10-31 Brother Ind Ltd 無線通信システム
JP2008153972A (ja) * 2006-12-18 2008-07-03 Kenwood Corp 無線通信機
WO2017221918A1 (fr) * 2016-06-24 2017-12-28 日本電気株式会社 Dispositif de communication sans fil, système de communication sans fil, procédé de communication sans fil et support d'informations sur lequel est stocké un programme de communication sans fil

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JP7132367B2 (ja) 2022-09-06
JPWO2020166235A1 (ja) 2021-11-18

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