Wireless communication system and wireless surveillance control system
A wireless communication system that communicates by an electromagnetic wave includes a first wireless device that includes a transmission rotationally polarized wave frequency generator for giving a rotation period to a polarized wave of the electromagnetic wave to be transmitted, transmits a synchronization code by the electromagnetic wave of the polarized wave rotated using the transmission rotationally polarized wave frequency generator, and transmits data by the electromagnetic wave, and a second wireless device that includes a reception rotationally polarized wave frequency generator for giving a rotation period to the polarized wave received in a reception of the electromagnetic wave, calculates transmission timing of the synchronization code included in the received electromagnetic wave of the polarized wave rotated using the reception rotationally polarized wave frequency generator, and sets a signal included in the received electromagnetic wave, as data based on the calculated transmission timing.
1. A wireless communication system that communicates by an electromagnetic wave, the wireless communication system comprising:
a first wireless device that includes a transmission rotationally polarized wave frequency generator for giving a rotation period to a polarized wave of the electromagnetic wave to be transmitted, transmits a synchronization code by the electromagnetic wave of the polarized wave rotated using the transmission rotationally polarized wave frequency generator, and transmits data by the electromagnetic wave of the polarized wave rotated using the transmission rotationally polarized wave frequency generator; and
a second wireless device that includes a reception rotationally polarized wave frequency generator for giving a rotation period to the polarized wave received in a reception of the electromagnetic wave, calculates transmission timing of the synchronization code included in the received electromagnetic wave of the polarized wave rotated using the reception rotationally polarized wave frequency generator, and sets a signal included in the received electromagnetic wave of the polarized wave rotated using the reception rotationally polarized wave frequency generator as data based on the calculated transmission timing.
2. The wireless communication system according to claim 1 , wherein
the first wireless device alternately transmits a signal of the synchronization code including a frequency component higher than a frequency of the rotationally polarized wave to detect each time within the rotation period given by the transmission rotationally polarized wave frequency generator and a signal of data including a frequency component lower than the frequency of the rotationally polarized wave to detect each time within the rotation period given by the transmission rotationally polarized wave frequency generator.
3. The wireless communication system according to claim 2 , wherein
the second wireless device calculates the transmission timing by sliding correlation between a signal of the synchronization code included in the received electromagnetic wave of the polarized wave rotated using the reception rotationally polarized wave frequency generator and a replica signal of the synchronization code.
4. The wireless communication system according to claim 1 , wherein
the first wireless device transmits a signal of the synchronization code including a frequency component higher than a frequency of the rotationally polarized wave to detect each time within the rotation period given by the transmission rotationally polarized wave frequency generator, and sequentially transmits a plurality of signals of data including a frequency component lower than the frequency of the rotationally polarized wave to detect each time within the rotation period given by the transmission rotationally polarized wave frequency generator after transmitting the signal of the synchronization code.
5. The wireless communication system according to claim 2 , wherein
the wireless communication system includes a plurality of the first wireless devices,
a third wireless device among the plurality of first wireless devices further includes a transmission carrier variable frequency generator that enables selection of a frequency of a carrier for transmitting the electromagnetic wave, and transmits an identification number of the third wireless device, the synchronization code, and data by the electromagnetic wave of the polarized wave that is rotated using the transmission rotationally polarized wave frequency generator and up-converted by the carrier of a first frequency selected in the transmission carrier variable frequency generator, and
a fourth wireless device among the plurality of first wireless devices further includes a reception rotationally polarized wave frequency generator for giving a rotation period to the polarized wave received in the reception of the electromagnetic wave, a reception carrier variable frequency generator that enables selection of a frequency of a carrier for receiving the electromagnetic wave, and a transmission carrier variable frequency generator that enables selection of a frequency of the carrier for transmitting the electromagnetic wave, detects the identification number of the third wireless device included in the received electromagnetic wave of the polarized wave that is rotated using the reception rotationally polarized wave frequency generator of the fourth wireless device and down-converted by the carrier of the first frequency selected in the reception carrier variable frequency generator of the fourth wireless device, and selects a second frequency in the transmission carrier variable frequency generator of the fourth wireless device.
6. The wireless communication system according to claim 2 , wherein
the wireless communication system includes a plurality of the first wireless devices,
a third wireless device among the plurality of first wireless devices further includes a transmission carrier variable frequency generator that enables selection of a frequency of a carrier for transmitting the electromagnetic wave, and transmits a first orthogonal synchronization code and data by the electromagnetic wave of the polarized wave that is rotated using the transmission rotationally polarized wave frequency generator and up-converted by the carrier of a first frequency selected in the transmission carrier variable frequency generator,
a fourth wireless device among the plurality of first wireless devices further includes a transmission carrier variable frequency generator that enables selection of the frequency of the carrier for transmitting the electromagnetic wave, and transmits a second orthogonal synchronization code and data by the electromagnetic wave of the polarized wave that is rotated using the transmission rotationally polarized wave frequency generator and up-converted by the carrier of a second frequency selected in the transmission carrier variable frequency generator of the fourth wireless device.
7. The wireless communication system according to claim 2 , wherein
the first wireless device further includes a transmission carrier fixed frequency generator of which a frequency of a carrier for transmitting the electromagnetic wave is fixed and a transmission carrier variable frequency generator that enables selection of the frequency of the carrier for transmitting the electromagnetic waves, transmits the synchronization code by the electromagnetic wave of the polarized wave that is rotated using the transmission rotationally polarized wave frequency generator and up-converted by the carrier of the transmission carrier fixed frequency generator, and transmits data by the electromagnetic wave of the polarized wave that is rotated using the transmission rotationally polarized wave frequency generator and up-converted by the carrier of a first frequency selected in the transmission carrier variable frequency generator, and
the second wireless device further includes a reception carrier fixed frequency generator of which a frequency of a carrier for receiving the electromagnetic wave is fixed and a reception carrier variable frequency generator that enables selection of the frequency of the carrier for receiving the electromagnetic waves, calculates the transmission timing of the synchronization code included in the received electromagnetic wave of the polarized wave that is rotated using the reception rotationally polarized wave frequency generator and down-converted by the carrier of the reception carrier fixed frequency generator, and sets the signal included in the received electromagnetic wave of the polarized wave that is rotated using the reception rotationally polarized wave frequency generator and down-converted by the carrier of the frequency selected in the reception carrier variable frequency generator, as data based on the calculated transmission timing.
8. The wireless communication system according to claim 7 , wherein
the transmission carrier fixed frequency generator and the reception carrier fixed frequency generator stop for a time set in advance.
9. The wireless communication system according to claim 2 , wherein
the wireless communication system includes a plurality of the first wireless devices and a plurality of the second wireless devices,
a third wireless device among the plurality of first wireless devices further includes a first transmission carrier variable frequency generator and a second transmission carrier variable frequency generator that enable selection of a frequency of a carrier for transmitting the electromagnetic wave, and a first transmission rotationally polarized wave frequency generator and a second transmission rotationally polarized wave frequency generator as the transmission rotationally polarized wave frequency generator, transmits a first orthogonal synchronization code by the electromagnetic wave of the polarized wave that is rotated in a first direction using the first transmission rotationally polarized wave frequency generator and up-converted by the carrier of a first frequency selected in the first transmission carrier variable frequency generator, and transmits data by the electromagnetic wave of the polarized wave that is rotated in a second direction using the second transmission rotationally polarized wave frequency generator and up-converted by the carrier of the first frequency selected in the second transmission carrier variable frequency generator,
a fourth wireless device among the plurality of first wireless devices further includes a third transmission carrier variable frequency generator and a fourth transmission carrier variable frequency generator that each enable selection of the frequency of the carrier for transmitting the electromagnetic wave, and a third transmission rotationally polarized wave frequency generator and a fourth transmission rotationally polarized wave frequency generator as the transmission rotationally polarized wave frequency generator, transmits a second orthogonal synchronization code by the electromagnetic wave of the polarized wave that is rotated in the first direction using the third transmission rotationally polarized wave frequency generator and up-converted by the carrier of a second frequency selected in the third transmission carrier variable frequency generator, and transmits data by the electromagnetic wave of the polarized wave that is rotated in the second direction using the fourth transmission rotationally polarized wave frequency generator and up-converted by the carrier of the second frequency selected in the fourth transmission carrier variable frequency generator,
a fifth wireless device among the plurality of second wireless devices further includes a first reception carrier variable frequency generator and a second reception carrier variable frequency generator that enable selection of a frequency of a carrier for receiving the electromagnetic wave, and a first reception rotationally polarized wave frequency generator and a second reception rotationally polarized wave frequency generator as the reception rotationally polarized wave frequency generator, calculates the transmission timing of the first orthogonal synchronization code included in the received electromagnetic wave of the polarized wave that is rotated in the first direction using the first reception rotationally polarized wave frequency generator and down-converted by the carrier of the first frequency selected in the first reception carrier variable frequency generator, and sets a signal included in the received electromagnetic wave of the polarized wave rotated in the second direction using the second reception rotationally polarized wave frequency generator, that is down-converted by the carrier of the first frequency selected in the second reception carrier variable frequency generator, as data based on the calculated transmission timing of the first orthogonal synchronization code, and
a sixth wireless device among the plurality of second wireless devices further includes a third reception carrier variable frequency generator and a fourth reception carrier variable frequency generator that enable selection of the frequency of the carrier for receiving the electromagnetic wave, and a third reception rotationally polarized wave frequency generator and a fourth reception rotationally polarized wave frequency generator as the reception rotationally polarized wave frequency generator, calculates the transmission timing of the second orthogonal synchronization code included in the received electromagnetic wave of the polarized wave that is rotated in the first direction using the third reception rotationally polarized wave frequency generator and down-converted by the carrier of the second frequency selected in the third reception carrier variable frequency generator, and sets a signal included in the received electromagnetic wave of the polarized wave that is rotated in the second direction using the fourth reception rotationally polarized wave frequency generator and down-converted by the carrier of the second frequency selected in the fourth reception carrier variable frequency generator, as data based on the calculated transmission timing of the second orthogonal synchronization code.
10. The wireless communication system according to claim 9 , wherein
the first transmission carrier variable frequency generator, the third transmission carrier variable frequency generator, the first reception carrier variable frequency generator, and the third reception carrier variable frequency generator stop for a time set in advance.
11. The wireless communication system according to claim 1 , wherein
the first wireless device further includes a first antenna, a second antenna, and a transmission rotationally polarized wave frequency cosine wave generator and a transmission rotationally polarized wave frequency sine wave generator as the transmission rotationally polarized wave frequency generator, branches the signal of the synchronization code into two, superimposes a zero phase channel signal on one side, mixes a cosine wave to the superimposed signal using the transmission rotationally polarized wave frequency cosine wave generator, transmits the mixed signal as the electromagnetic wave from the first antenna, superimposes a quadrature phase channel signal on the other side, mixes a sine wave to the superimposed signal using the transmission rotationally polarized wave frequency sine wave generator, transmits the mixed signal as the electromagnetic wave from the second antenna, branches a signal obtained by exchanging a bit string of data into two according to a rule set in advance, superimposes the zero phase channel signal on one side, mixes the cosine wave to the superimposed signal using the transmission rotationally polarized wave frequency cosine wave generator, transmits the mixed signal as the electromagnetic wave from the first antenna, superimposes the quadrature phase channel signal on the other side, mixes the sine wave to the superimposed signal using the transmission rotationally polarized wave frequency sine wave generator, and transmits the mixed signal as the electromagnetic wave from the second antenna, and
the second wireless device further includes a third antenna, a fourth antenna, and a reception rotationally polarized wave frequency cosine wave generator and a reception rotationally polarized wave frequency sine wave generator as the reception rotationally polarized wave frequency generator, mixes the cosine wave to a signal included in the electromagnetic wave received by the third antenna using the reception rotationally polarized wave frequency cosine wave generator to obtain a zero phase received signal, mixes the sine wave to the signal included in the electromagnetic wave received by the fourth antenna using the reception rotationally polarized wave frequency sine wave generator to obtain a quadrature phase received signal, calculates the transmission timing of the synchronization code included in the zero phase received signal and the quadrature phase received signal, and reconstructs data from a signal included in the zero phase received signal and the quadrature phase received signal based on the calculated transmission timing and the rule set in advance.
12. The wireless communication system according to claim 11 , wherein
the second wireless device further includes a first reception rotationally polarized wave frequency cosine wave generator and a second reception rotationally polarized wave frequency cosine wave generator as the reception rotationally polarized wave frequency cosine wave generator, and a first reception rotationally polarized wave frequency sine wave generator and a second reception rotationally polarized wave frequency sine wave generator as the reception rotationally polarized wave frequency sine wave generator, mixes the cosine wave to the signal included in the electromagnetic wave received by the third antenna using the first reception rotationally polarized wave frequency cosine wave generator to obtain a first zero phase received signal, mixes the cosine wave to the signal included in the electromagnetic wave received by the third antenna using the second reception rotationally polarized wave frequency cosine wave generator to obtain a second zero phase received signal, mixes the sine wave to the signal included in the electromagnetic wave received by the fourth antenna using the first reception rotationally polarized wave frequency sine wave generator to obtain a first quadrature phase received signal, mixes the sine wave to the signal included in the electromagnetic wave received by the fourth antenna using the second reception rotationally polarized wave frequency sine wave generator to obtain a second quadrature phase received signal, calculates the transmission timing of the synchronization code included in the first zero phase received signal and the first quadrature phase received signal, and reconstructs data from a signal included in the second zero phase received signal and the second quadrature phase received signal based on the calculated transmission timing and the rule set in advance.
13. The wireless communication system according to claim 11 , wherein
the first wireless device further includes the first antenna, the second antenna, and a first transmission rotationally polarized wave frequency cosine wave generator, a second transmission rotationally polarized wave frequency cosine wave generator, a first transmission rotationally polarized wave frequency sine wave generator, and a second transmission rotationally polarized wave frequency sine wave generator as the transmission rotationally polarized wave frequency generator, branches the signal of the synchronization code into two, mixes the cosine wave for right rotation using the first transmission rotationally polarized wave frequency cosine wave generator on one side, transmits the mixed signal as the electromagnetic wave from the first antenna, mixes the sine wave for right rotation using the first transmission rotationally polarized wave frequency sine wave generator on the other side, transmits the mixed signal as the electromagnetic wave from the second antenna, branches the signal obtained by exchanging the bit string of data into two according to the rule set in advance, superimposes the zero phase channel signal on one side, mixes the cosine wave for left rotation to the superimposed signal using the second transmission rotationally polarized wave frequency cosine wave generator, transmits the mixed signal as the electromagnetic wave from the first antenna, superimposes the quadrature phase channel signal on the other side, mixes the sine wave for left rotation to the superimposed signal using the second transmission rotationally polarized wave frequency sine wave generator, and transmits the mixed signal as the electromagnetic wave from the second antenna, and
the second wireless device further includes the third antenna, the fourth antenna, and a first reception rotationally polarized wave frequency cosine wave generator, a second reception rotationally polarized wave frequency cosine wave generator, a first reception rotationally polarized wave frequency sine wave generator, and a second reception rotationally polarized wave frequency sine wave generator as the reception rotationally polarized wave frequency generator, mixes the cosine wave to the signal included in the electromagnetic wave received by the third antenna using the first reception rotationally polarized wave frequency cosine wave generator to obtain a first zero phase received signal, mixes the cosine wave to the signal included in the electromagnetic wave received by the third antenna using the second reception rotationally polarized wave frequency cosine wave generator to obtain a second zero phase received signal, mixes the sine wave to the signal included in the electromagnetic wave received by the fourth antenna using the first reception rotationally polarized wave frequency sine wave generator to obtain a first quadrature phase received signal, mixes the sine wave to the signal included in the electromagnetic wave received by the fourth antenna using the first reception rotationally polarized wave frequency sine wave generator to obtain a second quadrature phase received signal, calculates the transmission timing of the synchronization code included in the first zero phase received signal and the first quadrature phase received signal, and reconstructs data from a signal included in the second zero phase received signal and the second quadrature phase received signal based on the calculated transmission timing and the rule set in advance.
14. A wireless surveillance control system of an elevator in which an elevator car moves in a building, wherein
an outer surface of the elevator car is provided with a slave station that includes a transmission rotationally polarized wave frequency generator for giving a rotation period to a polarized wave of an electromagnetic wave to be transmitted, transmits a synchronization code by the electromagnetic wave of the polarized wave rotated using the transmission rotationally polarized wave frequency generator, and transmits data for surveillance control by the electromagnetic wave of the polarized wave rotated using the transmission rotationally polarized wave frequency generator, and
an inner surface of the building is provided with a master station that includes a reception rotationally polarized wave frequency generator for giving a rotation period to the polarized wave received in a reception of the electromagnetic wave, calculates transmission timing of the synchronization code included in the received electromagnetic wave of the polarized wave rotated using the reception rotationally polarized wave frequency generator, and sets a signal included in the received electromagnetic wave of the polarized wave rotated using the reception rotationally polarized wave frequency generator as data for the surveillance control based on the calculated transmission timing.
15. A wireless surveillance control system of a plurality of substation machines by a plurality of base stations, wherein
each of the plurality of substation machines includes a slave station that includes a transmission rotationally polarized wave frequency generator for giving a rotation period to a polarized wave of an electromagnetic wave to be transmitted, transmits a synchronization code by the electromagnetic wave of the polarized wave rotated using the transmission rotationally polarized wave frequency generator, and transmits data for surveillance control by the electromagnetic wave of the polarized wave rotated using the transmission rotationally polarized wave frequency generator, and
each of the plurality of base stations includes a master station that includes a reception rotationally polarized wave frequency generator for giving a rotation period to the polarized wave received in a reception of the electromagnetic wave, calculates transmission timing of the synchronization code included in the received electromagnetic wave of the polarized wave rotated using the reception rotationally polarized wave frequency generator, and sets a signal included in the received electromagnetic wave of the polarized wave rotated using the reception rotationally polarized wave frequency generator, as data for the surveillance control, based on the calculated transmission timing.