JP2011024020A - Communication equipment and communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide communication equipment in which an antenna direction is adjusted highly accurately and/or at high speed by suppressing the influences of the weather or the like. <P>SOLUTION: The communication equipment includes: a first antenna (311) for wirelessly receiving a data signal; second antennas (312, 313) for wirelessly receiving signals of different frequency components in a positional information signal including a plurality of frequency components in accordance with a receiving angle of the positional information signal; a receiving part (306) for wirelessly receiving the data signal via the first antenna during a first receiving mode and wirelessly receiving the positional information signal via the second antennas during a second receiving mode; and an antenna direction adjusting part (302) for adjusting the direction of an antenna part including the first antenna and the second antennas in accordance with a frequency of the positional information signal received by the receiving part during the second receiving mode. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a communication device and a communication system.

  The millimeter wave band is advantageous in that the wavelength is shorter than that of the microwave band and an antenna having high directivity can be realized in a small size. Since the size of the antenna aperture is inversely proportional to the wavelength of the radio wave, for example, when considering a parabolic antenna with a directivity of 1 °, it becomes a huge antenna of about 7 m at 3 GHz, whereas it becomes a desktop antenna of about 23 cm at 90 GHz. . On the other hand, millimeter waves have a greater atmospheric attenuation than microwaves and are easily affected by weather such as rainfall. In addition, it is difficult from the technical point of view to obtain a high-power amplifier that generates sufficient transmission power to cover these attenuations. Therefore, many medium- and long-distance communication apparatuses using a millimeter-wave band form a millimeter-wave beam using an antenna having high directivity and compensate for attenuation due to the atmosphere or the like with an antenna gain.

  When a highly directional antenna is used, the beam diameter becomes small, so the optical axis alignment between the opposing transmitter and receiver, that is, the search for the direction of arrival of radio waves and the adjustment of the antenna orientation in that direction are major issues It becomes. For example, a lens antenna having a frequency of 85 GHz and an antenna gain of 40 dBi has a directivity of ± 1 ° from the optical axis direction. When a transmitting / receiving device using this antenna is placed 1 km away from each other, the radio wave irradiation range is only about 35 m. This problem is not only in the initial installation of the communication apparatus, but also becomes a problem during normal operation because the transmission / reception apparatus fluctuates due to strong winds or ground vibrations and the received radio wave intensity varies.

  Methods for searching for the direction of arrival of radio waves and adjusting the antenna orientation include visual observation with binoculars and the like, and irradiation with a laser beam. Since these require human hands, accuracy is low and a great deal of time is required. Furthermore, depending on the weather, a good field of view may not be obtained and adjustment may be impossible.

  In addition, a method is known in which the antenna orientation is adjusted in a direction in which the maximum intensity can be obtained while monitoring the reception intensity (see, for example, Japanese Patent Laid-Open No. 2000-304839). There, the directional antenna is rotated, the continuous wave transmitted from the transmission side is received, and the received signal power of the directional antenna is measured. This method requires a search algorithm that takes into account fluctuations in radio field intensity, rotation accuracy of the antenna drive system, and the like, and if they are affected by noise, it is difficult to converge to the maximum intensity point.

  In addition, 2D-MUSIC method, FFT-MUSIC method, 2D-Unity ESPRIT method and the like are known. For example, a transmitting device that transmits a signal that is PSK modulated with a PN code sequence, a receiving device that converts a signal group received by a plurality of antenna elements arranged on a plane into an intermediate frequency or a demodulated signal, and outputs this, There is known a radio wave environment analyzing apparatus including a signal processing apparatus that analyzes a signal incident on a receiving apparatus by performing signal processing on a signal group output from the receiving apparatus (see, for example, Japanese Patent Application Laid-Open No. 11-344517). ). Since there are a plurality of receiving antenna elements and receiving units connected to the respective receiving antennas, not only the apparatus is increased in size, but also the amount of calculation of the signal processing unit is increased, resulting in an increase in power consumption.

JP 2000-304839 A Japanese Patent Laid-Open No. 11-344517

  The objective of this invention is providing the communication apparatus and communication system which can suppress the influence of a weather etc. and can adjust the direction of an antenna with high precision and / or high speed.

  The communication system includes a first communication device including a first transmission device and a second communication device including a first reception device, and the first transmission device transmits a signal wirelessly. Directional antenna, a second directional antenna having a lower directivity than the first directional antenna, and wirelessly transmitting a signal, and a data signal via the first directional antenna in the first transmission mode. And a first transmitter that wirelessly transmits a position information signal including a plurality of frequency components via the second directional antenna in the second transmission mode, and the first receiver Is a first antenna that wirelessly receives the data signal from the first transmitter, and different frequency components in the position information signal according to the reception angle of the position information signal received from the first transmitter. Second antenna for wirelessly receiving the signal of In the first reception mode, the first receiving unit wirelessly receives the data signal via the first antenna, and in the second reception mode, wirelessly receives the position information signal via the second antenna. In the second reception mode, the first antenna adjusts the direction of the antenna unit including the first antenna and the second antenna according to the frequency of the position information signal received by the first receiver. There is provided a communication system including an antenna direction adjustment unit.

  The direction of the antenna of the communication device can be adjusted with high accuracy and / or high speed while suppressing the influence of weather and the like.

It is a figure which shows the structural example of the communication system by the 1st Embodiment of this invention. 2A and 2B are diagrams illustrating a configuration example of the transmission apparatus in FIG. 3A and 3B are diagrams illustrating a configuration example of the receiving apparatus in FIG. It is a figure for demonstrating the principle and operation | movement algorithm of the estimation of the electromagnetic wave arrival direction of the communication system by 1st Embodiment, and adjustment of an antenna direction. It is a figure which shows the structural example of the baseband signal production | generation part of FIG. 2 (B). 6 (A) to 6 (C) are diagrams showing the impulse generator of FIG. 2 (B). FIGS. 7A and 7B are diagrams showing characteristics of the highly directional antenna of FIG. 2B. It is a figure which shows the structural example of the positional infomation signal generation part of FIG. 2 (B). It is a figure which shows the frequency characteristic of the low directivity antenna of FIG. FIGS. 10A and 10B are diagrams showing an NRD guide (Non-Radiative Dielectric waveguide) frequency scanning antenna. It is a figure which shows the structural example of the baseband signal decoding part of FIG. 3 (B). 12 (A) and 12 (B) are diagrams showing the position information detection unit of FIG. 3 (B). FIGS. 13A to 13C are diagrams illustrating a part of the transmission apparatus in the antenna direction adjustment mode of FIG. FIGS. 14A and 14B are diagrams illustrating a configuration example of a transmission apparatus according to the second embodiment of the present invention. FIGS. 15A and 15B are diagrams illustrating a configuration example of a transmission apparatus according to the third embodiment of the present invention. FIGS. 16A and 16B are diagrams illustrating a configuration example of a receiving device according to the third embodiment of the present invention. FIGS. 17A to 17C are diagrams showing position information signals transmitted by the transmission apparatus according to the fourth embodiment of the present invention. It is a figure which shows the other structural example of a communication system.

(First embodiment)
FIG. 1 is a diagram illustrating a configuration example of a communication system according to a first embodiment of the present invention. The communication system includes a transmission device 101 and a reception device 102. The transmission apparatus 101 includes a large-capacity data transmission unit 111 and a position information transmission unit 112. The receiving apparatus 102 includes a large-capacity data receiving unit 121, a radio wave arrival direction estimating unit 122, and an antenna direction adjusting unit 123. The communication mode has a normal mode (first mode) and an antenna direction adjustment mode (second mode). In the normal mode, the large-capacity data transmission unit 111 in the transmission apparatus 101 wirelessly transmits large-capacity data, and the large-capacity data reception unit 121 in the reception apparatus 102 wirelessly receives the large-capacity data. In the antenna direction adjustment mode, the position information transmission unit 112 in the transmission device 101 wirelessly transmits the position information, the radio wave arrival direction estimation unit 122 in the reception device 102 estimates the radio wave arrival direction based on the received position information, The antenna direction adjustment unit 123 in the receiving apparatus 102 adjusts the direction of the antenna of the receiving apparatus 102 based on the estimated radio wave arrival direction.

  2B is a diagram illustrating a configuration example of the transmission apparatus 101 in FIG. 1, and FIG. 2A is a diagram illustrating an arrangement example of the antenna unit 210 in the transmission apparatus 101. The transmission apparatus 101 is, for example, an impulse radio transmission apparatus, and includes a baseband signal generation unit 201, a position information signal generation unit 202, a switch 203, a communication mode selection signal output unit 204, a transmission unit 205, a switch 209, and an antenna unit 210. . The transmission unit 205 includes an impulse generator 206, a band pass filter 207, and a transmission amplifier 208. The antenna unit 210 includes a high directivity antenna 211 and a low directivity antenna 212. As shown in FIG. 2A, for example, the high directivity antenna 211 is provided at the center of the antenna unit 210, and the low directivity antenna 212 is provided below the high directivity antenna 211.

  The high directivity antenna 211 is an antenna for wirelessly transmitting a data signal. The low directivity antenna 212 is lower in directivity than the high directivity antenna 211 and is an antenna for wirelessly transmitting a position information signal. The baseband signal generation unit 201 is a data signal generation unit that generates a data signal. The data signal is a signal having a pulse when the data is “1” and having no pulse when the data is “0”. The position information signal generation unit 202 generates a position information signal. The position information signal is a signal including a plurality of frequency components with a constant frequency interval Δf (see FIG. 13B). The communication mode selection signal output unit 204 outputs a signal in the normal mode (first transmission mode) or the antenna direction adjustment mode (second transmission mode) to the switches 203 and 209.

  First, a case where the communication mode selection signal output unit 204 outputs a normal mode signal to the switches 203 and 209 will be described. When the switch 203 receives the normal mode signal, the switch 203 connects the input terminal of the impulse generator 206 to the output terminal of the baseband signal generation unit 201. When the switch 209 receives the antenna direction adjustment mode signal, the switch 209 connects the output terminal of the transmission amplifier 208 to the high directivity antenna 211. The impulse generator 206 generates an impulse based on the data signal generated by the baseband signal generation unit 201. Specifically, the impulse generator 206 generates an impulse for each pulse in the data signal. The band pass filter 207 filters the impulse generated by the impulse generator 206 and passes only the component of a predetermined frequency band. Thereby, it is possible to perform communication using only the permitted frequency band of wireless communication. The transmission amplifier 208 amplifies the data signal output from the bandpass filter 207 and wirelessly transmits the data signal to the reception apparatus 102 via the high directivity antenna 211. In a medium to long distance communication apparatus of about km using the millimeter wave band, attenuation by the atmosphere or the like can be compensated by an antenna gain by forming a millimeter wave beam using the highly directional antenna 211.

  Next, a case where the communication mode selection signal output unit 204 outputs the antenna direction adjustment mode signal to the switches 203 and 209 will be described. When the switch 203 receives an antenna direction adjustment mode signal, the switch 203 connects the input terminal of the impulse generator 206 to the output terminal of the position information signal generation unit 202. When the switch 209 receives the antenna direction adjustment mode signal, the switch 209 connects the output terminal of the transmission amplifier 208 to the low directivity antenna 212. The impulse generator 206 generates an impulse based on the position information signal generated by the position information signal generation unit 202. The band pass filter 207 filters the impulse generated by the impulse generator 206 and passes only the component of a predetermined frequency band. The transmission amplifier 208 amplifies the position information signal output from the band pass filter 207 and wirelessly transmits the position information signal to the reception apparatus 102 via the low directivity antenna 212.

  As described above, in the normal mode, the path of the baseband signal generation unit 201 → the transmission unit 205 → the high directivity antenna 211 is established, and in the antenna direction adjustment mode, the position information signal generation unit 202 → the transmission unit 205 → the low directivity. The path of the directional antenna 212 is established. These modes are switched by the communication mode selection signal output unit 204. The baseband signal generation unit 201 generates digital data signals “1” and “0” corresponding to data to be transmitted. The position information signal generation unit 202 generates a repeated signal having a frequency interval Δf as a position information signal. This position information signal may be a sine wave or a rectangular wave. The transmission unit 205 of the impulse radio transmission apparatus includes an impulse generator 206, a band pass filter 207, and a transmission amplifier 208. The impulse generator 206 uses the signal input from the baseband signal generation unit 201 or the position information signal generation unit 202 to generate an impulse signal having an extremely small half width (for example, 10 picoseconds or less). The impulse signal generated by the impulse generator 206 passes through the band-pass filter 207 to generate a millimeter wave pulse signal having a desired frequency component. The millimeter wave pulse signal is amplified to a necessary power level by the transmission amplifier 208 and radiated to the space via the high directivity antenna 211 or the low directivity antenna 212.

  FIG. 3B is a diagram illustrating a configuration example of the reception device 102 in FIG. 1, and FIG. 3A is a diagram illustrating an arrangement example of the antenna unit 310 in the reception device 102. The receiving apparatus 102 is, for example, an impulse radio receiving apparatus, and includes a baseband signal decoding unit 301, a radio wave arrival direction estimation / antenna direction adjustment unit 302, a position information detection (frequency detection) unit 303, a switch 304, a communication mode selection signal output unit. 305, a reception amplifier 306, switches 307 and 308, a van / tilt selection signal output unit 309, and an antenna unit 310. The antenna unit 310 includes a highly directional antenna 311, a van direction (horizontal direction) detection antenna 312, and a tilt direction (vertical direction) detection antenna 313. As shown in FIG. 3A, for example, the high directivity antenna 311 is provided at the center of the antenna unit 310, and the van direction detection antenna 312 is provided on the high directivity antenna 311 in the horizontal direction, and the tilt direction. The detection antenna 313 is provided in the vertical direction next to the highly directional antenna 311.

  The highly directional antenna 311 is an antenna for wirelessly receiving a data signal from the transmission device 101. The van direction detection antenna 312 and the tilt direction detection antenna 313 are antennas for wirelessly receiving signals of different frequency components in the position information signal from the transmission apparatus 101 according to the reception angle of the position information signal including a plurality of frequency components. is there. The van direction detection antenna 312 is an antenna in a first direction that wirelessly receives signals of different frequency components in the position information signal according to the reception angle of the position information signal in the first direction (van direction). This is an antenna for detecting a position information signal reception angle in the direction of (a van direction). The tilt direction detection antenna 313 wirelessly transmits signals of different frequency components in the position information signal according to the reception angle of the position information signal in the second direction (tilt direction) perpendicular to the first direction (van direction). It is an antenna for receiving in the second direction, and is an antenna for detecting the position information signal reception angle in the second direction (tilt direction).

  The communication mode selection signal output unit 305 outputs a signal in the normal mode (first reception mode) or the antenna direction adjustment mode (second reception mode) to the switches 304 and 307. The normal mode is a normal reception mode for receiving a data signal from the transmission apparatus 101. The antenna direction adjustment mode is a mode for adjusting the direction of the antenna unit 310. In the normal mode, since the transmission apparatus 101 transmits a data signal using the high directivity antenna 211, the antenna unit 310 in the reception apparatus 102 needs to face the direction of the transmission apparatus 101. Therefore, the direction of the antenna unit 310 in the receiving apparatus 102 is adjusted by the antenna direction adjustment mode. Thereafter, data signal communication is performed from the transmission apparatus 101 to the reception apparatus 102 in the normal mode.

  In the antenna direction adjustment mode, the van / tilt selection signal output unit 309 outputs a signal in the van direction mode or the tilt direction mode to the switch 308. The van direction mode is a mode for adjusting the direction of the antenna unit 310 in the van direction. The tilt direction mode is a mode for adjusting the direction of the tilt direction of the antenna unit 310.

  First, a case where the communication mode selection signal output unit 305 outputs a normal mode signal to the switches 304 and 307 will be described. When the switch 307 receives a normal mode signal, the switch 307 connects the input terminal of the reception amplifier 306 to the high directivity antenna 211. When the switch 304 receives the normal mode signal, the switch 304 connects the output terminal of the reception amplifier 306 to the input terminal of the baseband signal decoding unit 301. The highly directional antenna 311 wirelessly receives a data signal from the transmission device 101. The reception amplifier 306 amplifies the data signal received wirelessly via the highly directional antenna 311. The baseband signal decoding unit 301 decodes the data signal amplified by the reception amplifier 306.

  Next, a case where the communication mode selection signal output unit 305 outputs the antenna direction adjustment mode signal to the switches 304 and 307 will be described. In that case, the van / tilt selection signal output unit 309 outputs a signal in the van direction mode or the tilt direction mode to the switch 308. First, a case where the van / tilt selection signal output unit 309 outputs a van direction signal to the switch 308 will be described. When receiving the antenna direction adjustment mode signal, the switch 307 connects the input terminal of the reception amplifier 306 to the node N1. When the switch 304 receives the antenna direction adjustment mode signal, the switch 304 connects the output terminal of the reception amplifier 306 to the input terminal of the position information detection unit 303. When the switch 308 receives a van direction mode signal, the switch 308 connects the node N1 to the van direction detection antenna 312. The van direction detection antenna 312 wirelessly receives only the frequency component corresponding to the reception angle in the van direction of the position information signal transmitted by the transmission device 101. The reception amplifier 306 amplifies the position information signal wirelessly received via the van direction detection antenna 312. The position information detection unit 303 detects the frequency of the position information signal amplified by the reception amplifier 306. The radio wave arrival direction estimation and antenna direction adjustment unit 302 estimates the radio wave arrival direction of the position information signal from the transmission device 101 based on the frequency detected by the position information detection unit 303. Specifically, the radio wave arrival direction estimation and antenna direction adjustment unit 302 receives the reception angle of the van direction detection antenna 312 of the position information signal transmitted by the transmission device 101 based on the frequency detected by the position information detection unit 303. Ask for. Next, the radio wave arrival direction estimation and antenna direction adjustment unit 302 sets the antenna so that the reception angle becomes 0 ° based on the obtained reception angle, that is, the antenna unit 310 faces the direction of the transmission device 101. The direction of the vane direction of the part 310 is adjusted by moving it with a motor or the like.

  Next, a case where the van / tilt selection signal output unit 309 outputs a signal in the tilt direction to the switch 308 in the antenna direction adjustment mode will be described. When the switch 308 receives a tilt direction mode signal, the switch 308 connects the node N1 to the tilt direction detection antenna 313. The tilt direction detection antenna 313 wirelessly receives only a frequency component corresponding to the reception angle in the tilt direction of the position information signal transmitted by the transmission apparatus 101. The reception amplifier 306 amplifies the position information signal wirelessly received via the tilt direction detection antenna 313. The position information detection unit 303 detects the frequency of the position information signal amplified by the reception amplifier 306. The radio wave arrival direction estimation and antenna direction adjustment unit 302 estimates the radio wave arrival direction of the position information signal from the transmission device 101 based on the frequency detected by the position information detection unit 303. Specifically, the radio wave arrival direction estimation and antenna direction adjustment unit 302 receives the reception angle of the tilt direction detection antenna 313 of the position information signal transmitted by the transmission device 101 based on the frequency detected by the position information detection unit 303. Ask for. Next, the radio wave arrival direction estimation and antenna direction adjustment unit 302 sets the antenna so that the reception angle becomes 0 ° based on the obtained reception angle, that is, the antenna unit 310 faces the direction of the transmission device 101. The direction of the tilt direction of the unit 310 is adjusted by moving it with a motor or the like.

  As described above, the van direction detection antenna 312 and the tilt direction detection antenna 313 use antennas having different directivities depending on frequencies, such as leaky wave antennas. In the normal mode, a path of the high directivity antenna 311 → the reception amplifier 306 → the baseband signal decoding unit 301 is established. In the antenna direction adjustment mode, the van / tilt direction detection antennas 312 and 313 → the reception amplifier 306 → the position information detection unit. A path 303 is established. These modes are switched by the communication mode selection signal output unit 305. Further, the receiving apparatus 102 has a van direction mode and a tilt direction mode in the antenna direction adjustment mode, and these modes are switched by the van / tilt selection signal output unit 309. Baseband signal decoding section 301 includes a detector and decodes data from the received signal. The position information detection unit 303 includes a frequency detector, detects the frequency of the received position information signal, and outputs information on the frequency to the radio wave arrival direction estimation and antenna direction adjustment unit 302.

  FIG. 4 is a diagram for explaining the principle and operation algorithm of the estimation of the arrival direction of the radio wave and the adjustment of the antenna direction of the communication system according to the present embodiment. The communication system includes a transmission device 101 and a reception device 102. The transmission apparatus 101 includes a low directivity antenna 212. The receiving apparatus 102 includes a van direction detection antenna 312. Here, it is assumed that the transmitting apparatus 101 and the receiving apparatus 102 are opposed to each other and communication is performed by adjusting the direction of the van direction antenna 312 of the receiving apparatus 102.

  The transmission device 101 transmits a position information signal via the low directivity antenna 212. The position information signal is a repetitive signal having a frequency Δf and an impulse train having a frequency Δf. When viewed on the frequency axis, the impulse train having the frequency Δf can be regarded as a comb (comb) wave having a spectrum at a frequency interval Δf. This can be easily confirmed by Fourier theory. Only a desired frequency band is extracted from the comb wave by the bandpass filter 207 in the transmission apparatus 101 in FIG. 2B, and is radiated by the low directivity antenna 212 as a position information signal. The radio wave from the low directivity antenna 212 does not form a beam like the high directivity antenna 211 and is radiated at a wide angle. Therefore, even if the optical axes (opposite axes) of the transmission apparatus 101 and the reception apparatus 102 are shifted, transmission and reception of position information signals are possible although the intensity is small. In the position information signal radiated from the transmission apparatus 101, various frequency spectra are mixed at the frequency interval Δf. However, the receiving device 102 in FIG. 3B can receive by the van direction detection antenna 312 and the tilt direction detection antenna 313 because the directivity differs depending on the frequency, and therefore the frequency determined by the facing angle between the transmitting device 101 and the receiving device 102. It becomes only an ingredient. For example, as shown in FIG. 10B, the vane direction detection antenna 312 and the tilt direction detection antenna 313 of the reception apparatus 102 receive only a frequency component of about 81 GHz when the reception angle is 0 °, When is 30 °, only a frequency component of about 85 GHz is received. Therefore, if the frequency of the signal received by the van direction detection antenna 312 and the tilt direction detection antenna 313 is detected, the receiving apparatus 102 can estimate the radio wave arrival direction and the direction of the antenna unit 310 can be corrected. Although the intensity of the received signal of the receiving apparatus 102 is weak, detection accuracy is high because frequency detection that is resistant to noise is performed. If the correction is repeated until the frequency of the received signal coincides with the frequency at an angle of 0 ° in the direction of arrival of the radio wave, the optical axis is accurately aligned. The correction is alternately repeated in the van direction → tilt direction → van direction... And the direction of the antenna unit 310 is adjusted when the frequency of the angle 0 ° of the radio wave arrival direction completely coincides in both the van direction and the tilt direction. Complete.

  As described above, the van direction detection antenna 312 uses a leaky wave antenna or a frequency scanning antenna. The position information signal 402 transmitted by the transmission apparatus 101 is a comb wave having a frequency range f1 to fn and a frequency interval Δf. In FIG. 2B, the positional information signal generation unit 202 and the impulse generator 206 generate impulses having a frequency Δf, and the band-pass filter 207 performs filtering to generate a comb wave having a frequency interval Δf. The position information signal of the comb wave is radiated by the low directivity antenna 212. Due to the radiation of the position information signal 402, the incident signal 401 from the transmission device 101 to the reception device 102 has, for example, a frequency of fn-1 and an angle in the van direction of θn-1. The frequency fc is a frequency received when the angle in the van direction is 0 °. 3B, the position information detection unit 303 detects the frequency fn-1 of the signal received by the van direction detection antenna 312, and the radio wave arrival direction estimation and antenna direction adjustment unit 302 receives the frequency of the reception signal. The angle θn−1 in the arrival direction (van direction) is specified from fn−1. Then, the radio wave arrival direction estimation and antenna direction adjustment unit 302 rotates the receiving apparatus 102 or the antenna unit 310 by an angle θn−1 to align the optical axis of the antenna unit 310. The above processing is repeated until the frequency of the received signal reaches the frequency fc with an angle of arrival of 0 °. The tilt direction detection antenna 313 is used to adjust the antenna direction in the tilt direction as well as the van direction.

  FIG. 18 is a diagram illustrating another configuration example of the communication system. The communication system includes a first communication device 1801 and a second communication device 1802. The first communication device 1801 includes a transmission device 101 and a reception device 102. The second communication device 1802 includes a transmission device 101 and a reception device 102. The communication devices 101 and 102 are the same as the transmission device 101 and the reception device 102 described above. The communication devices 1801 and 1802 can be transmitted by the transmission device 101 and received by the reception device 102, respectively. Communication devices 1801 and 1802 can communicate with each other wirelessly. The signal transmitted by the transmission device 101 in the first communication device 1801 is received by the reception device 102 in the second communication device 1802, and the signal transmitted by the transmission device 101 in the second communication device 1802 is the first signal. The reception device 102 in the communication device 1801 receives the data.

  First, the function of the transmission device 101 in the first communication device 1801 is turned on, the function of the reception device 102 in the second communication device 1802 is turned on, and the antenna direction of the antenna of the second communication device 1802 is adjusted. Do. Next, the roles of transmission and reception are changed, the function of the reception device 102 in the first communication device 1801 is turned on, the function of the transmission device 101 in the second communication device 1802 is turned on, and the first communication device 1801 is turned on. Adjust the antenna direction for the other antenna. If necessary, the above-mentioned adjustment is repeated again by changing the roles of transmission and reception. In this way, the optical axis (antenna direction) is completely matched between the communication devices 1801 and 1802 facing each other. Thereafter, in the normal mode, transmission of a data signal using the high directivity antenna 211 is started between the communication devices 1801 and 1802. Even after the optical axis alignment is established, by monitoring the reception frequency by the van direction detection antenna 312 and the tilt direction detection antenna 313, the optical axis shake due to wind, vibration, etc. is corrected even during system operation. can do.

  Note that synchronization of mode switching between the communication devices 1801 and 1802 is performed by data communication in the normal mode. By this data communication, the modes of the communication devices 1801 and 1802 can be switched simultaneously.

  The transmitting apparatus 101 in the first communication apparatus 1801 has a first highly directional antenna 211 that wirelessly transmits a signal, and a first highly directional antenna 211 that has a lower directivity than the first highly directional antenna 211 and wirelessly transmits a signal. A low directivity antenna 212 and a first transmission unit 205 are included. The first transmission unit 205 wirelessly transmits a data signal via the first high directivity antenna 211 in the normal mode, and transmits a plurality of frequency components via the first low directivity antenna 212 in the antenna direction adjustment mode. The position information signal including it is transmitted wirelessly.

  The receiving device 102 in the second communication device 1802 receives from the first antenna 311 that wirelessly receives a data signal from the transmitting device 101 in the first communication device 1801 and the transmitting device 101 in the first communication device 1801. Second antennas 312, 313, a first receiving unit 306, and a first antenna direction adjusting unit 302 that wirelessly receive signals of different frequency components in the positional information signal according to the reception angle of the received positional information signal. And have. The first receiving unit 306 wirelessly receives a data signal via the first antenna 311 in the normal mode, and wirelessly receives a position information signal via the second antennas 312 and 313 in the antenna direction adjustment mode. The first antenna direction adjustment unit 302 includes an antenna unit including a first antenna 311 and second antennas 312 and 313 according to the frequency of the position information signal received by the first reception unit 306 in the antenna direction adjustment mode. The direction of 310 is adjusted.

  The transmission apparatus 101 in the second communication apparatus 1802 has a second high-directivity antenna 211 that wirelessly transmits a signal and a second high-directivity antenna 211 that has a lower directivity than the second high-directivity antenna 211 and transmits a signal wirelessly. A low directivity antenna 212 and a second transmission unit 205 are included. The second transmission unit 205 wirelessly transmits a data signal via the second high directivity antenna 211 in the normal mode, and transmits a plurality of frequency components via the second low directivity antenna 212 in the antenna direction adjustment mode. The position information signal including it is transmitted wirelessly.

  The reception device 102 in the first communication device 1801 receives from the third antenna 311 that wirelessly receives a data signal from the transmission device 101 in the second communication device 1802 and the transmission device 101 in the second communication device 1802. Fourth antennas 312, 313, a second receiving unit 306, and a second antenna direction adjusting unit 302 that wirelessly receive signals of different frequency components in the positional information signal according to the reception angle of the received positional information signal. And have. The second receiving unit 306 wirelessly receives the data signal via the third antenna 311 in the normal mode, and wirelessly receives the position information signal via the fourth antennas 312 and 313 in the antenna direction adjustment mode. In the antenna direction adjustment mode, the antenna direction adjustment unit 302 is directed to the antenna unit 310 including the third antenna 311 and the fourth antennas 312 and 313 according to the frequency of the position information signal received by the second reception unit 306. Adjust.

  The configuration of the impulse radio communication apparatus has been described above as an example, but the present invention can also be applied to other types of communication apparatuses. The communication system according to the present embodiment includes a high-directivity antenna 211 for transmitting large-capacity data as a transmitting device 101 and a position information signal transmitting antenna 212 having a lower directivity than that, and a high-directivity for receiving large-capacity data as a receiving device 102. Directional antenna 311 and van / tilt direction detection antennas 312 and 313 having different directivities depending on the reception frequency. In the impulse radio communication apparatus, the example using the comb wave having the frequency interval Δf as the position information signal has been described. However, the frequency interval Δf does not need to be constant within the desired frequency band, and a signal having a continuous spectrum is used. Is also possible.

  The communication system includes, for example, 10 Gb / s impulse radio communication devices 1801 and 1802 in a 70 to 80 GHz band. Hereinafter, a configuration example of the transmission apparatus 101 in FIG.

  FIG. 5 is a diagram illustrating a configuration example of the baseband signal generation unit 201 in FIG. The baseband signal generation unit 201 includes a logical product (AND) circuit 501. The AND circuit 501 outputs a logical product signal of the data signal D1 and the clock signal CK as the data signal D2. The data signal D1 is a 10 Gb / s non-return zero (NRZ) data signal. The clock signal CK is a 10 GHz clock signal. The data signal D2 is a 10 Gb / s return zero (RZ) data signal. The AND circuit 501 converts the NRZ data signal D1 having a transmission rate of 10 Gb / s into an RZ data signal D2 by using a 10 GHz clock signal CK. The data signal D2 generates a high level pulse when the data is “1”, and does not generate a high level pulse when the data is “0”.

  6A is a circuit diagram showing a configuration example of the impulse generator 206 in FIG. 2B, and FIG. 6B is a timing chart showing an operation example of the impulse generator 206 in FIG. 6A. FIG. 6C is a graph showing the pulse width of the impulse generated by the impulse generator 206 of FIG.

  As shown in FIG. 6A, the impulse generator 206 includes a buffer 601, delay control buffers 602 and 603, a NAND (NAND) circuit 604, and a buffer 605. The buffer 601 buffers the signal D2 and outputs a data signal IN. The delay control buffer 602 delays the data signal IN by a delay time φ1 corresponding to the control voltage CNT1, and outputs the delayed data signal A. The delay control buffer 603 delays the data signal IN by a delay time φ2 corresponding to the control voltage CNT2, and outputs an inverted data signal B of the delayed data signal. The negative logical product circuit 604 outputs a negative logical product signal Q of the data signals A and B as an impulse 606. The buffer 605 buffers the signal Q and outputs a data signal OUT.

  In FIG. 6C, the horizontal axis indicates the voltage CNT1, and the vertical axis indicates the pulse half width of the impulse 606. Here, the control voltage CNT2 is fixed at 0.6V. By controlling the control voltage CNT1, the pulse half width of the impulse 606 can be changed. The impulse generator 206 generates an extremely short pulse 606 having a pulse half width of 10 ps or less based on the input RZ data signal D2. Thereby, the impulse generator 206 can generate the pulse signal OUT having a sufficiently large spectrum in the frequency band of 70 to 80 GHz. The transmission apparatus 101 passes this pulse signal OUT through the band-pass filter 207, amplifies the signal with the transmission amplifier 208, and transmits it through the antenna 211 or 212.

  FIG. 7A is a diagram showing the directivity of the highly directional antenna 211 in FIG. 2B, and FIG. 7B is a diagram showing frequency characteristics. The highly directional antenna 211 uses a dielectric lens antenna and obtains an antenna gain of 40 dBi with a diameter of 6 inches. This corresponds to a directivity of ± 1 ° at −20 dB in FIG.

  FIG. 8 is a diagram illustrating a configuration example of the position information signal generation unit 202 in FIG. The position information signal generation unit 202 includes an oscillator 801. The oscillator 801 outputs a sine wave or rectangular wave having a frequency Δf (for example, 100 MHz) as the position information signal OUT. The frequency Δf corresponds to the frequency interval Δf in FIG.

  13A is a diagram illustrating a partial configuration of the transmission apparatus 101 in the antenna direction adjustment mode of FIG. 2B, and FIG. 13B is a diagram illustrating the pass characteristics of the bandpass filter 207. FIG. 13C is a diagram illustrating a position information signal output from the band pass filter 207.

  The oscillator 801 (FIG. 8) corresponds to the position information signal generation unit 202. The oscillator 801 outputs a sine wave or rectangular wave having a frequency Δf (for example, 100 MHz). The impulse generator 206 generates an impulse based on the sine wave or rectangular wave generated by the oscillator 801. The band-pass filter 207 has the pass characteristic of FIG. 13B and passes only the components in the frequency band from f1 to fn. As a result, the bandpass filter 207 outputs a comb wave (see FIG. 4) having a spectrum with a frequency interval Δf in the frequency range from f1 to fn. As shown in FIG. 13C, the output signal of the bandpass filter 207 is a comb wave having a period of 1 / Δf. By changing the frequency Δf of the oscillator 801, the frequency interval Δf in FIG. 13B can be changed.

  FIG. 9 is a diagram illustrating frequency characteristics of the low directivity antenna 212 of FIG. For example, a horn antenna is used as the low directivity antenna.

  Next, the structure of the receiving device in FIG. The high directional antenna 311 in FIG. 3B uses the same dielectric lens antenna as the high directional antenna 211 of the transmission apparatus 101.

FIG. 10A is a diagram illustrating a configuration example of an NRD guide (Non-Radiative Dielectric waveguide) frequency scanning antenna, and FIG. 10B is a diagram illustrating a relationship between a reception beam angle and a reception frequency of the NRD guide frequency scanning antenna. It is. An NRD guide frequency scanning antenna can be used as the van direction detection antenna 312 and the tilt direction detection antenna 313 in FIG. The beam angle θ of the leaky wave antenna is represented by sin ⁻¹ of the normalized phase constant β / k ₀ (k ₀ : free space wave number) of the NRD guide (θ = sin ⁻¹ (β / k ₀ )). . As the leaky wave antenna, the van direction detection antenna 312 is installed in the horizontal direction, and the tilt direction detection antenna 313 is installed in the vertical direction.

  The NRD guide frequency scanning antenna includes a metal plate 1001, a dielectric 1002, and an opening surface 1003. The dielectric 1002 is, for example, polymethylpentene (εr = 2.21) and is sandwiched between the metal plates 1001. As shown in FIG. 10B, the reception frequency of the NRD guide frequency scanning antenna differs depending on the reception beam angle.

  FIG. 11 is a diagram illustrating a configuration example of the baseband signal decoding unit 301 in FIG. The baseband signal decoding unit 301 includes an envelope detection diode 1101, a limit amplifier 1102, and a CDR (clock data recovery) circuit 1103. The envelope detection diode 1101 detects the input signal by rectification. The limit amplifier 1102 amplifies the detected signal. The CDR circuit 1103 generates a clock signal based on the amplified signal and decodes the data. The baseband signal decoding unit 301 decodes 10 Gb / s data based on the received 70 to 80 GHz millimeter wave signal.

  12A is a circuit diagram illustrating a configuration example of the position information detection unit 303 in FIG. 3B, and FIG. 12B illustrates the frequency f and the output voltage Vout of the input signal 1201 of the position information detection unit 303. It is a graph which shows the relationship. The position information detection unit 303 includes a capacitor C0 and inductors L0 and L1, inputs an input signal 1201, and outputs an output signal 1202. The capacitor C0 is connected between the input terminal of the input signal 1201 and the reference potential. The inductor L0 is connected in parallel with the capacitor C0. The inductor L1 is connected between the input terminal of the input signal 1201 and the output terminal of the output signal 1202. The resonance frequency f0 of the parallel circuit of the capacitor C0 and the inductor L0 is expressed by the following equation.

    f0 = 1 / {2π × √ (L0 × C0)}

  In FIG. 12B, the horizontal axis represents the frequency f of the input signal 1201, and the vertical axis represents the voltage Vout of the output signal 1202. By using the characteristic region 1203, the output voltage Vout changes according to the frequency f of the input signal 1201. That is, by examining the output voltage Vout, the frequency of the input signal 1201 can be known, and the reception frequency of the van direction detection antenna 312 or the tilt direction detection antenna 313 can be known. As described above, since the output voltage Vout has frequency dependence, the frequency f of the input signal 1201 can be detected as a function of the output voltage Vout.

  The radio wave arrival direction estimation and antenna direction adjustment unit 302 in FIG. 3B estimates the reception angle in the radio wave arrival direction based on the signal 1202 from the position information signal detection unit 303, and the receiving device 102 is mounted based on the reception angle. Rotate the turntable.

(Second Embodiment)
FIG. 14B is a diagram illustrating a configuration example of the transmission apparatus 101 according to the second embodiment of the present invention, and FIG. 14A is a diagram illustrating an arrangement example of the antenna unit 210 in the transmission apparatus 101. The transmission apparatus in FIG. 14B is different from the transmission apparatus in FIG. 2B in that two position information signal generation units 202a and 202b are provided. Hereinafter, differences between the transmission device in FIG. 14B and the transmission device in FIG. 2B will be described. The coarse adjustment position information signal generation unit 202a generates, for example, a 100 MHz position information signal using an oscillator. The position information signal generation unit 202b for fine adjustment generates a position information signal of 10 MHz, for example, with an oscillator. The communication mode selection signal output unit 204 outputs a signal in the normal mode or the antenna direction adjustment mode to the switches 203 and 209. Further, the communication mode selection signal output unit 204 outputs a signal in the coarse adjustment mode or the fine adjustment mode to the switch 203 in the antenna direction adjustment mode. When the normal mode is input, the switch 203 connects the input terminal of the impulse generator 206 to the output terminal of the baseband signal generation unit 201. Further, when the switch 203 receives a signal of the coarse adjustment mode in the antenna direction adjustment mode, the switch 203 connects the input terminal of the impulse generator 206 to the output terminal of the coarse adjustment position information signal generation unit 202a. When the switch 203 receives a fine adjustment mode signal in the antenna direction adjustment mode, the switch 203 connects the input terminal of the impulse generator 206 to the output terminal of the position information signal generation unit 202b for fine adjustment. In the coarse adjustment mode, the band pass filter 207 outputs a position information signal having a frequency interval of 100 MHz (see FIG. 17B). In the fine adjustment mode, the band pass filter 207 outputs a position information signal having a frequency interval of 10 MHz that is narrower than the frequency interval of 100 MHz in the coarse adjustment mode (see FIG. 17A). In the antenna direction adjustment mode, the transmission unit 205 transmits the position information signal of the first frequency interval (100 MHz) in the coarse adjustment mode, and the second frequency narrower than the first frequency interval (100 MHz) in the fine adjustment mode. A position information signal at an interval (10 MHz) is transmitted.

  The transmitting apparatus 101 first transmits the position information signal in the coarse adjustment mode, and then switches to the fine adjustment mode when the frequency of the position information signal received by the receiving apparatus 102 approaches the frequency fc of the reception angle 0 °, Increase the accuracy of optical axis alignment. The reception apparatus 102 instructs the transmission apparatus 101 to transmit the position information signal in the coarse adjustment mode when the reception angle is larger than the threshold value, and transmits the position information signal in the fine adjustment mode when the reception angle is smaller than the threshold value. Instructs the transmission apparatus 101. The instruction from the receiving apparatus 102 to the transmitting apparatus 101 is performed by data communication in the normal mode. By changing the frequency interval Δf of the position information signal in the coarse adjustment mode and the fine adjustment mode, both high accuracy and high speed of the optical axis alignment can be achieved.

(Third embodiment)
FIG. 15B is a diagram illustrating a configuration example of the transmission apparatus 101 according to the third embodiment of the present invention, and FIG. 15A is a diagram illustrating an arrangement example of the antenna unit 210 in the transmission apparatus 101. In the first and second embodiments, an example of an impulse radio communication apparatus has been described. In the present embodiment, an example of a multiband communication apparatus will be described. The multiband communication device is, for example, an orthogonal frequency division multiplexing (OFDM) communication device. The transmission apparatus in FIG. 15B is different from the transmission apparatus in FIG. Hereinafter, the points of the present embodiment different from the first embodiment will be described.

  The transmission unit 205 includes a local oscillator 1501, a mixer 1502, and a transmission amplifier 208. The communication mode selection signal output unit 204 outputs a signal in the normal mode or the antenna direction adjustment mode to the baseband signal generation unit 201 and the switch 209. The baseband signal generation unit 201 generates a data signal when a normal mode signal is input, and generates a position information signal when an antenna direction adjustment mode signal is input. In the normal mode, a normal multiband data signal is generated. In the antenna direction adjustment mode, unmodulated comb waves of a plurality of subcarriers are generated as position information signals (see FIG. 17A). The local oscillator 1501 generates a local signal having a local frequency. The mixer 1502 mixes the data signal or position information signal generated by the baseband signal generation unit 201 and the local signal generated by the local oscillator 1501. The transmission amplifier 208 amplifies the mixed signal. In the normal mode, the transmission amplifier 208 wirelessly transmits a data signal via the highly directional antenna 211. In the antenna direction adjustment mode, the transmission amplifier 208 wirelessly transmits a position information signal via the low directivity antenna 212.

  FIG. 16B is a diagram illustrating a configuration example of the reception device 102 according to the third embodiment of the present invention, and FIG. 16A is a diagram illustrating an arrangement example of the antenna unit 310 in the reception device 102. In the first and second embodiments, an example of an impulse radio communication apparatus has been described. In the present embodiment, an example of a multiband communication apparatus will be described. In the receiving apparatus in FIG. 16B, a local oscillator 1601 and a mixer 1602 are added to the receiving apparatus in FIG. Hereinafter, the points of the present embodiment different from the first embodiment will be described.

  The communication mode selection signal output unit 305 outputs a signal in the normal mode or the antenna direction adjustment mode to the baseband signal decoding unit 301 and the switch 307. The local oscillator 1601 generates a local signal having a local frequency. The mixer 1602 mixes the data signal or position information signal amplified by the reception amplifier 306 and the local signal generated by the local oscillator 1601. The baseband signal decoding unit 301 receives the normal mode signal and decodes the mixed data signal. In the antenna direction adjustment mode, the position information detection unit 303 inputs the mixed position information signal via the baseband signal decoding unit 301 and detects the frequency of the position information signal. The radio wave arrival direction estimation and antenna direction adjustment unit 302 estimates the radio wave arrival direction of the position information signal from the transmission device 101 based on the frequency detected by the position information detection unit 303.

  In the antenna direction adjustment mode, the van / tilt selection signal output unit 309 outputs a signal in the van direction mode or the tilt direction mode to the switch 308. When the switch 308 receives a van direction mode signal, the switch 308 connects the node N1 to the van direction detection antenna 312. In that case, the radio wave arrival direction estimation and antenna direction adjustment unit 302 obtains the reception angle of the van direction detection antenna 312 of the position information signal transmitted by the transmission device 101 based on the frequency detected by the position information detection unit 303. The direction of the receiving device 102 or the antenna unit 310 in the van direction is adjusted by moving the motor or the like.

  Further, when the switch 308 receives a tilt direction mode signal, the switch 308 connects the node N1 to the tilt direction detection antenna 313. In that case, the radio wave arrival direction estimation and antenna direction adjustment unit 302 obtains the reception angle of the tilt direction detection antenna 313 of the position information signal transmitted by the transmission device 101 based on the frequency detected by the position information detection unit 303. Then, the direction of the tilt direction of the receiving apparatus 102 or the antenna unit 310 is adjusted by moving the motor or the like.

  As described above, the present embodiment is a multiband communication device. The frequency interval Δf does not need to be constant within the desired frequency band, and a signal having a continuous spectrum can be used.

(Fourth embodiment)
FIGS. 17A to 17C are diagrams showing position information signals transmitted by the transmission apparatus 101 according to the fourth embodiment of the present invention. This embodiment shows an example in which the second embodiment is applied to the multiband communication apparatus of the third embodiment. Hereinafter, differences of the present embodiment from the third embodiment will be described. As in the second embodiment, the transmission apparatus 101 according to this embodiment transmits a position information signal for coarse adjustment or a position information signal for fine adjustment. The baseband signal generation unit 201 in FIG. 15B has the functions of the position information signal generation unit 202a for coarse adjustment and the position information signal generation unit 202b for fine adjustment in FIG. 14B.

  The communication mode selection signal output unit 204 outputs a signal in the coarse adjustment mode or the fine adjustment mode to the baseband signal generation unit 201 in the antenna direction adjustment mode. When the signal in the coarse adjustment mode is input, the baseband signal generation unit 201 thins out some of the subcarriers, and outputs the position information signal of the first frequency interval in FIG. 17B to the mixer 1502. The transmission amplifier 208 transmits the position information signal at the first frequency interval via the low directivity antenna 212.

  Moreover, when the fine band adjustment mode signal is input, the baseband signal generation unit 201 does not perform subcarrier thinning, and the position information signal of the second frequency interval in FIG. 17A that is narrower than the first frequency interval. Output to the mixer 1502. The transmission amplifier 208 transmits the position information signal at the second frequency interval via the low directivity antenna 212.

  In the present embodiment, as in the second embodiment, by changing the frequency interval Δf of the position information signal between the coarse adjustment mode and the fine adjustment mode, both high accuracy and high speed of optical axis alignment are achieved. be able to.

  Further, the baseband signal generation unit 201 may output the position information signal in FIG. 17C to the mixer 1502 when an antenna direction adjustment mode signal is input. The position information signal in FIG. 17C is generated by removing some subcarrier signals from the signal in FIG. In the antenna direction adjustment mode, the transmission unit 205 transmits a position information signal having a narrow frequency interval in the vicinity of the first frequency fc and a wider frequency interval as the distance from the first frequency fc increases. As shown in FIG. 4, the first frequency fc is a frequency received by the van direction detection antenna 312 or the tilt direction detection antenna 313 when the angle in the van direction or tilt direction is 0 °. Thereby, when the van direction or the tilt direction is around 0 °, the frequency interval of the position information signal is narrow and fine adjustment of the antenna direction can be performed. Further, the farther the van direction or tilt direction is from 0 °, the wider the frequency interval of the position information signal, and the coarse antenna direction adjustment can be performed.

  As described above, according to the first to fourth embodiments, the influence of weather and the like can be suppressed, and the direction of the antenna of the communication device can be adjusted with high accuracy and / or high speed.

  With the explosive increase of Internet users and the increase in capacity and diversification of contents such as high-definition images, an increase in transmission capacity is also desired in wireless communication. As a large-capacity wireless communication apparatus, it is suitable to use a millimeter wave band that has few commercial wireless stations and can easily secure a wide frequency band. In addition, the impulse-type wireless communication device has a feature that a local oscillator and a mixer are not required and the configuration of the wireless unit is simple and low-cost as compared with a narrow-band communication device using a carrier wave method. ) Is expected as a large-capacity wireless communication device exceeding. The wireless communication devices according to the first to fourth embodiments are affected by weather and noise in a situation where the transmission device 101 and the reception device 102 are installed several kilometers apart and perform large-capacity data transmission using a highly directional antenna. Can detect the direction of arrival of radio waves quickly with high accuracy and perform normal communication, thereby reducing the installation and operation costs of the communication system.

  The above-described embodiments are merely examples of implementation in carrying out the present invention, and the technical scope of the present invention should not be construed in a limited manner. That is, the present invention can be implemented in various forms without departing from the technical idea or the main features thereof.

  Regarding the above embodiment, the following additional notes are disclosed.

(Appendix 1)
A transmission device,
The transmitter is
A first directional antenna that wirelessly transmits a signal;
A second directional antenna having a lower directivity than the first directional antenna and wirelessly transmitting a signal;
In the first transmission mode, a data signal is wirelessly transmitted via the first directional antenna, and in the second transmission mode, a position information signal including a plurality of frequency components is wirelessly transmitted via the second directional antenna. A communication apparatus comprising: a transmission unit for transmitting.
(Appendix 2)
The transmitter is
A data signal generator for generating the data signal;
A position information signal generator for generating the position information signal;
In the first transmission mode, an impulse is generated based on the data signal generated by the data signal generation unit. In the second transmission mode, an impulse is generated based on the position information signal generated by the position information signal generation unit. An impulse generator for generating
The communication apparatus according to claim 1, further comprising: a band-pass filter that filters the impulse generated by the impulse generator.
(Appendix 3)
The transmitter is
A signal generator for generating the data signal in the first transmission mode, and generating the position information signal in the second transmission mode;
A local oscillator for generating a local signal;
The communication apparatus according to claim 1, further comprising a mixer that mixes the data signal or the position information signal generated by the signal generation unit and the local signal generated by the local oscillator.
(Appendix 4)
In the second transmission mode, the transmission unit transmits a position information signal of a first frequency interval in the coarse adjustment mode, and a position of a second frequency interval that is narrower than the first frequency interval in the fine adjustment mode. 4. The communication device according to any one of appendices 1 to 3, wherein the communication device transmits an information signal.
(Appendix 5)
In the second transmission mode, the transmission unit transmits a position information signal having a narrow frequency interval near the first frequency and a wider frequency interval as the distance from the first frequency increases. 4. The communication device according to any one of items 3.
(Appendix 6)
And a receiving device,
The receiving device is:
A first antenna for wirelessly receiving a data signal;
A second antenna for wirelessly receiving signals of different frequency components in the position information signal according to the reception angle of the position information signal including a plurality of frequency components;
A reception unit that wirelessly receives the data signal via the first antenna in the first reception mode, and wirelessly receives the position information signal via the second antenna in the second reception mode;
The second reception mode includes an antenna direction adjustment unit that adjusts the direction of the antenna unit including the first antenna and the second antenna according to the frequency of the position information signal received by the reception unit. The communication device according to any one of appendices 1 to 5, characterized in that:
(Appendix 7)
A first antenna for wirelessly receiving a data signal;
A second antenna for wirelessly receiving signals of different frequency components in the position information signal according to the reception angle of the position information signal including a plurality of frequency components;
A reception unit that wirelessly receives the data signal via the first antenna in the first reception mode, and wirelessly receives the position information signal via the second antenna in the second reception mode;
The second reception mode includes an antenna direction adjustment unit that adjusts the direction of the antenna unit including the first antenna and the second antenna according to the frequency of the position information signal received by the reception unit. A communication device characterized by the above.
(Appendix 8)
The second antenna is
A first direction antenna for wirelessly receiving signals of different frequency components in the position information signal according to a reception angle of the position information signal in the first direction;
A second direction antenna that wirelessly receives signals of different frequency components in the position information signal according to a reception angle of the position information signal in a second direction perpendicular to the first direction;
In the second reception mode, the reception unit wirelessly receives the position information signal via the antenna in the first direction in the first direction mode, and in the second direction mode, Wirelessly receiving the location information signal via an antenna;
In the second reception mode, the antenna direction adjustment unit adjusts the orientation of the antenna unit in the first direction according to the frequency of the position information signal received by the reception unit in the first direction mode. The communication device according to appendix 7, wherein in the second direction mode, the direction of the second direction of the antenna unit is adjusted according to the frequency of the position information signal received by the receiving unit.
(Appendix 9)
A first communication device including a first transmission device;
A second communication device including a first receiving device;
The first transmission device includes:
A first directional antenna that wirelessly transmits a signal;
A second directional antenna having a lower directivity than the first directional antenna and wirelessly transmitting a signal;
In the first transmission mode, a data signal is wirelessly transmitted via the first directional antenna, and in the second transmission mode, a position information signal including a plurality of frequency components is wirelessly transmitted via the second directional antenna. A first transmitter for transmitting,
The first receiving device is:
A first antenna that wirelessly receives the data signal from the first transmitter;
A second antenna for wirelessly receiving signals of different frequency components in the position information signal according to a reception angle of the position information signal received from the first transmission device;
A first reception unit that wirelessly receives the data signal via the first antenna in the first reception mode, and wirelessly receives the position information signal via the second antenna in the second reception mode; ,
In the second reception mode, a first antenna direction that adjusts the direction of the antenna unit including the first antenna and the second antenna according to the frequency of the position information signal received by the first reception unit. A communication system comprising an adjustment unit.
(Appendix 10)
The first communication device further includes a second receiving device,
The second communication device further includes a second transmission device,
The second transmitter is
A third directional antenna that wirelessly transmits a signal;
A fourth directional antenna that is less directional than the third directional antenna and wirelessly transmits a signal;
In the first transmission mode, a data signal is wirelessly transmitted via the third directional antenna, and in the second transmission mode, a positional information signal including a plurality of frequency components is wirelessly transmitted via the fourth directional antenna. A second transmitter for transmitting,
The second receiving device is:
A third antenna that wirelessly receives the data signal from the second transmitter;
A fourth antenna that wirelessly receives signals of different frequency components in the position information signal according to a reception angle of the position information signal received from the second transmission device;
A second reception unit that wirelessly receives the data signal via the third antenna in the first reception mode, and wirelessly receives the position information signal via the fourth antenna in the second reception mode; ,
In the second reception mode, a second antenna direction that adjusts the direction of the antenna unit including the third antenna and the fourth antenna according to the frequency of the position information signal received by the second reception unit. The communication system according to appendix 9, further comprising an adjustment unit.

201 baseband signal generation unit 202 position information signal generation unit 203 switch 204 communication mode selection signal output unit 205 transmission unit 206 impulse generator 207 bandpass filter 208 transmission amplifier 209 switch 210 antenna unit 211 high directivity antenna 212 low directivity antenna 301 Baseband signal generation unit 302 Radio wave arrival direction estimation and antenna direction adjustment unit 303 Position information detection unit 304 Switch 305 Communication mode selection signal output unit 306 Reception amplifier 307, 308 Switch 309 Van / tilt selection signal output unit 310 Antenna unit 311 High Directional antenna 312 Van direction detection antenna 313 Tilt direction detection antenna

Claims (8)

A transmission device,
The transmitter is
A first directional antenna that wirelessly transmits a signal;
A second directional antenna having a lower directivity than the first directional antenna and wirelessly transmitting a signal;
In the first transmission mode, a data signal is wirelessly transmitted via the first directional antenna, and in the second transmission mode, a position information signal including a plurality of frequency components is wirelessly transmitted via the second directional antenna. A communication apparatus comprising: a transmission unit for transmitting. The transmitter is
A data signal generator for generating the data signal;
A position information signal generator for generating the position information signal;
In the first transmission mode, an impulse is generated based on the data signal generated by the data signal generation unit. In the second transmission mode, an impulse is generated based on the position information signal generated by the position information signal generation unit. An impulse generator for generating
The communication apparatus according to claim 1, further comprising: a band-pass filter that filters the impulse generated by the impulse generator. The transmitter is
A signal generator for generating the data signal in the first transmission mode, and generating the position information signal in the second transmission mode;
A local oscillator for generating a local signal;
The communication apparatus according to claim 1, further comprising a mixer that mixes the data signal or the position information signal generated by the signal generation unit and the local signal generated by the local oscillator.   In the second transmission mode, the transmission unit transmits a position information signal of a first frequency interval in the coarse adjustment mode, and a position of a second frequency interval that is narrower than the first frequency interval in the fine adjustment mode. The communication apparatus according to claim 1, wherein an information signal is transmitted. And a receiving device,
The receiving device is:
A first antenna for wirelessly receiving a data signal;
A second antenna for wirelessly receiving signals of different frequency components in the position information signal according to the reception angle of the position information signal including a plurality of frequency components;
A reception unit that wirelessly receives the data signal via the first antenna in the first reception mode, and wirelessly receives the position information signal via the second antenna in the second reception mode;
The second reception mode includes an antenna direction adjustment unit that adjusts the direction of the antenna unit including the first antenna and the second antenna according to the frequency of the position information signal received by the reception unit. The communication device according to claim 1, wherein A first antenna for wirelessly receiving a data signal;
A second antenna for wirelessly receiving signals of different frequency components in the position information signal according to the reception angle of the position information signal including a plurality of frequency components;
A reception unit that wirelessly receives the data signal via the first antenna in the first reception mode, and wirelessly receives the position information signal via the second antenna in the second reception mode;
The second reception mode includes an antenna direction adjustment unit that adjusts the direction of the antenna unit including the first antenna and the second antenna according to the frequency of the position information signal received by the reception unit. A communication device characterized by the above. A first communication device including a first transmission device;
A second communication device including a first receiving device;
The first transmission device includes:
A first directional antenna that wirelessly transmits a signal;
A second directional antenna having a lower directivity than the first directional antenna and wirelessly transmitting a signal;
In the first transmission mode, a data signal is wirelessly transmitted via the first directional antenna, and in the second transmission mode, a position information signal including a plurality of frequency components is wirelessly transmitted via the second directional antenna. A first transmitter for transmitting,
The first receiving device is:
A first antenna that wirelessly receives the data signal from the first transmitter;
A second antenna for wirelessly receiving signals of different frequency components in the position information signal according to a reception angle of the position information signal received from the first transmission device;
A first reception unit that wirelessly receives the data signal via the first antenna in the first reception mode, and wirelessly receives the position information signal via the second antenna in the second reception mode; ,
In the second reception mode, a first antenna direction that adjusts the direction of the antenna unit including the first antenna and the second antenna according to the frequency of the position information signal received by the first reception unit. A communication system comprising an adjustment unit. The first communication device further includes a second receiving device,
The second communication device further includes a second transmission device,
The second transmitter is
A third directional antenna that wirelessly transmits a signal;
A fourth directional antenna having a lower directivity than the third directional antenna and wirelessly transmitting a signal;
In the first transmission mode, a data signal is wirelessly transmitted via the third directional antenna, and in the second transmission mode, a positional information signal including a plurality of frequency components is wirelessly transmitted via the fourth directional antenna. A second transmitter for transmitting,
The second receiving device is:
A third antenna that wirelessly receives the data signal from the second transmitter;
A fourth antenna that wirelessly receives signals of different frequency components in the position information signal according to a reception angle of the position information signal received from the second transmission device;
A second reception unit that wirelessly receives the data signal via the third antenna in the first reception mode, and wirelessly receives the position information signal via the fourth antenna in the second reception mode; ,
In the second reception mode, a second antenna direction that adjusts the direction of the antenna unit including the third antenna and the fourth antenna according to the frequency of the position information signal received by the second reception unit. The communication system according to claim 7, further comprising an adjustment unit.

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