JP7186062B2 - Wireless system and wireless communication method - Google Patents

Description

The present invention relates to wireless systems.

An Internet of Things that connects a plurality of devices to the Internet, collects information indicating the state of the devices, transmits signals to control the devices based on the collected information, and improves the operating efficiency of the devices. A concept called Things (IoT) is attracting attention. In order to realize IoT, it is necessary to connect sensors that monitor information about the state of equipment and actuators that control the operation of equipment to networks. necessary. It is necessary to install tens to thousands of sensors and actuators in a plurality of devices that make up the system, and it is desirable to connect by wireless communication that does not require cables, which are physical connecting means. Coupling by wireless communication eliminates restrictions on the operating conditions of the devices and reduces hardware installation costs associated with the coupling.

In radio communication, since a radio device having at least one of a transmitter and a receiver is installed on the surface of and near the device, electromagnetic waves transmitted and received by the radio device are scattered by the device. In general, if there is an obstacle to electromagnetic waves between a transmitter and a receiver, line-of-sight communication cannot be performed, and communication is mainly performed using reflected waves. In such a radio environment, many devices surround the communicating transmitters and receivers, creating multiple radio propagation paths formed by single and multiple reflections. Since a plurality of propagation paths are formed by reflection of electromagnetic waves by different devices, a plurality of propagation paths having different properties are used, unlike line-of-sight communication. Therefore, simultaneously transmitted information may differ by the number of multiple propagation paths formed by device reflections between a transmitter and a receiver.

Electromagnetic waves are transverse waves and have electric and magnetic field vectors perpendicular to the direction of travel. Since an electromagnetic wave radiated from one transmission point spreads in a cylindrical shape and is transmitted through space, in principle, the intensity of the electromagnetic wave attenuates with the square of the distance, and the intensity of the electromagnetic wave attenuates with the square of the frequency. The communication distance required in a system to which IoT is applied ranges from several tens of meters to several hundred meters for consumer systems, and from several hundred meters to several kilometers for social infrastructure systems. In order to obtain sufficient signal strength over such a communication distance, the frequency of electromagnetic waves used in wireless communication cannot be increased from the viewpoint of strength attenuation. Obi and below are used. Radio equipment that transmits and receives electromagnetic waves is installed on or near the surface of equipment. This is difficult due to the size limitation of the radio.

As background arts in this technical field, there are the following prior arts. In Patent Document 1 (Japanese Laid-Open Patent Publication No. 5-48511), by controlling an error correction encoder and an antenna switcher, any single bit information of a transmitter input signal is transmitted from a plurality of different antennas. , which randomizes errors generated by a propagation path, improves the error correction decoding capability of a receiver of the signal, and realizes a reduction in the error rate of the transmission signal.

JP-A-5-48511

In the above-mentioned prior art, a transmitter with two spatially orthogonal adjacent antennas is used to transmit two different signals generated by spreading with different codes using orthogonally polarized electromagnetic waves, The two different signals are reproduced at a receiver with two symmetrically orthogonal antennas in close proximity. As a result, information is simultaneously transmitted using two propagation paths formed between the transmitter and the receiver, thereby doubling the communication capacity. In this prior art, a transmitter and a receiver are surrounded by a large number of devices, and two of a plurality of propagation paths with different properties formed between the transmitter and the receiver by reflections of the large number of devices are used. As a result, there is a problem that a further increase in communication capacity cannot be realized by using a larger number of propagation paths.

In such a situation, a transmitter surrounded by a large number of devices that scatter electromagnetic waves using a plurality of reflected propagation paths formed between the transmitter and the receiver by controlling the polarization of the transmitter and the receiver. The challenge is to provide means for increasing the wireless transmission capacity between the radio and the receiver.

A representative example of the invention disclosed in the present application is as follows. That is, the radio system includes a transmitter that transmits information data and a receiver that receives the information data transmitted from the transmitter, and the transmitter and the receiver each have a plane of polarization with each other. The transmitter has a plurality of antennas that are not in a parallel relationship, and the transmitter converts one series of serial information data into two series of parallel data, quadrature-modulates the converted parallel data, and converts the rotationally polarized data in different directions of rotation to each other . It is characterized by simultaneously transmitting the quadrature -modulated two-sequence parallel data from the plurality of antennas using waves .

According to one aspect of the present invention, wireless transmission capacity can be increased. Problems, configurations, and effects other than those described above will be clarified by the following description of the embodiments.

1 is a diagram illustrating a configuration example of a wireless system according to a first embodiment; FIG. FIG. 10 is a diagram illustrating a configuration example of a wireless system according to a second embodiment; FIG. 11 is a diagram illustrating a configuration example of a transmitter of a wireless system according to Example 3; FIG. 11 is a diagram illustrating a configuration example of a receiver of a wireless system of Example 3; FIG. 13 is a diagram illustrating a configuration example of a transmitter of a wireless system of Example 4; FIG. 12 is a diagram illustrating a configuration example of a transmitter of a wireless system of Example 5; FIG. 13 is a diagram illustrating a configuration example of a transmitter of a wireless system of Example 6; FIG. 21 is a diagram illustrating a configuration example of a transmitter of a wireless system of Example 7; FIG. 21 is a diagram illustrating a configuration example of a wireless device of a wireless system according to an eighth embodiment; FIG. 21 is a diagram illustrating a configuration example of a wireless device of a wireless system according to a ninth embodiment; FIG. 21 is a diagram illustrating a configuration example of a wireless device of a wireless system according to a tenth embodiment; FIG. 21 is a diagram illustrating a configuration example of a wireless device in a wireless system according to an eleventh embodiment; FIG. 21 is a diagram showing a configuration example of an elevator monitoring/control system according to a twelfth embodiment; FIG. 21 is a diagram showing a configuration example of an elevator monitoring/control system according to a thirteenth embodiment; 1 is a diagram showing the principle of operation of a radio system according to an embodiment of the present invention; FIG.

An embodiment will be described below with reference to the drawings.

[Example 1]
In this embodiment, the operation of a wireless system that increases the communication capacity by using a plurality of propagation paths formed between a transmitter and a receiver with the rotary polarization of the present invention will be described with reference to FIGS. 1 and 15. do.

FIG. 1 is a diagram showing a configuration example of a radio system in which communication capacity is increased by using a plurality of propagation paths formed between a transmitter and a receiver with rotationally polarized waves according to this embodiment.

The wireless system of this embodiment has a transmitter 101 and a receiver 201 .

The transmitter 101 has an information digital signal generation circuit 1 and a pilot digital signal generation circuit 2 . The output of the information digital signal generation circuit 1 is converted by the first serial/parallel 2-system converter 3 into serial 2-bits into 2-system outputs. The output of the pilot digital signal generating circuit 2 is converted by a second serial/parallel 2-system converter 4 into serial 2-bit outputs of 2 systems.

The output of the first system of the first serial-parallel two-system converter 3 is branched into two, one of which is sent to a rotary polarization frequency cosine wave generating circuit 15 via a first rotary polarization frequency 90-degree phase shifter 13. is multiplied by the first multiplier 11 and input to the second combiner 28 . On the other hand, the output signal of the rotary polarization frequency cosine wave generating circuit 15 is directly multiplied by the third multiplier 16 and input to the first combiner 18 .

The output of the second system of the first serial/parallel two-system converter 3 is branched into two, one of which is sent to a first rotary polarization frequency 270-degree phase shifter 14 to a rotary polarization frequency cosine wave generating circuit 15. is multiplied by the second multiplier 12 and input to the second combiner 28 . On the other hand, the output signal of the rotary polarization frequency cosine wave generating circuit 15 is directly multiplied by the fourth multiplier 17 and input to the first combiner 18 .

The output of the first system of the second serial/parallel two-system converter 4 is branched into two, one of which is sent to a rotary polarized wave frequency sine wave generation circuit 25 via a second rotary polarized wave frequency 90-degree phase shifter 23. is multiplied by the fifth multiplier 21 and input to the second combiner 28 . The other is multiplied by the seventh multiplier 26 by the output signal of the rotary polarization frequency sine wave generating circuit 25 and input to the first synthesizer 18 .

The output of the second system of the second serial/parallel two-system converter 4 is branched into two, one of which is sent to a rotary polarized wave frequency sine wave generation circuit 25 via a second rotary polarized wave frequency 270-degree phase shifter 24. is multiplied by the sixth multiplier 22 and input to the second combiner 28 . On the other hand, the output signal of the rotary polarization frequency sine wave generating circuit 25 is multiplied by the eighth multiplier 27 and input to the first combiner 18 .

The output of the first combiner 18 is up-converted by the first transmission mixer 34 using the output signal of the transmission carrier frequency generation circuit 35 and radiated into space from the first transmission antenna 31 . The output of the second synthesizer 28 is up-converted by the second transmission mixer 36 using the output signal of the transmission carrier frequency generation circuit 35 and radiated into space from the second transmission antenna 32 . The first transmitting antenna 31 and the second transmitting antenna 32 are arranged so as to be spatially orthogonal to each other.

The receiver 201 has a first receiving antenna 41 and a second receiving antenna 42 which are spatially orthogonal to each other.

The output of first receive antenna 41 is downconverted in first receive mixer 44 using the output signal of receive carrier frequency generator circuit 45 . The output of the first receiving mixer 44 is branched into two, one of which is multiplied by the output signal of the rotary polarization frequency cosine wave generating circuit 51 in the first multiplier circuit 52, and the other is the rotary polarization frequency sine wave generating circuit. The output signal of 55 is multiplied by a third multiplier circuit 56 . The output of the first multiplication circuit 52 and the output of the third multiplication circuit 56 are added by the first addition circuit 61 and input to the reception signal processing circuit 49 . Also, the output signal of the first multiplication circuit 52 is subtracted from the output of the third multiplication circuit 56 by the first subtraction circuit 63 , and the result is input to the reception signal processing circuit 49 .

The output of second receive antenna 42 is downconverted in second receive mixer 46 using the output signal of receive carrier frequency generator circuit 45 . The output of the second reception mixer 46 is branched into two, one of which is multiplied by the output signal of the rotary polarization frequency cosine wave generation circuit 51 in the second multiplication circuit 53, and the other is the rotary polarization frequency sine wave generation circuit. The output signal of 55 is multiplied in a fourth multiplier circuit 57. FIG. The output of the second multiplication circuit 53 and the output of the fourth multiplication circuit 57 are added by the second addition circuit 62 and input to the received signal processing circuit 49 . Also, the output signal of the second multiplication circuit 53 is subtracted from the output of the fourth multiplication circuit 57 by the second subtraction circuit 64 , and the result is input to the reception signal processing circuit 49 .

Digital serial data of 0 or 1 output from the information digital signal generation circuit 1 is separated into odd bits and even bits by the first serial/parallel 2-system converter 3, and the signals of both bits are simultaneously transmitted from the antenna. be. That is, one of the two bits is modulated by a positive sine wave and a positive cosine wave of the rotational polarization frequency, up-converted at the carrier frequency, and then left-rotated by two spatially orthogonal antennas. It is radiated into space as polarized waves. The other of the two bits is modulated by a negative sign sine wave and a positive sign cosine wave of the rotationally polarized frequency, up-converted at the carrier frequency, and then rotated to the right by two spatially orthogonal antennas. It is radiated into space as a rotationally polarized wave. Stable operation can be achieved by quadrature modulation using a sine wave and a cosine wave having the same frequency as the polarization rotation frequency.

The 0 or 1 digital serial data output from the pilot digital signal generation circuit 2 is separated into odd bits and even bits by the second serial/parallel 2-system converter 4, and the signals of both bits are simultaneously sent to the antenna. sent from. That is, one of the two bits is modulated by a positive cosine wave and a positive sine wave of the rotational polarization frequency, up-converted at the carrier frequency, and then left-rotated by two spatially orthogonal antennas. It is radiated into space as a rotationally polarized wave. The other of the two bits is modulated by a negative cosine wave and a positive sine wave of the rotational polarization frequency, up-converted at the carrier frequency, and then rotated clockwise by two spatially orthogonal antennas. It is radiated into space as polarized waves. The contents of the output of the pilot digital signal generation circuit 2 are shared in advance between the transmitter and the receiver.

Rotationally polarized electromagnetic waves have three different frequency bands: a carrier frequency band, a polarization rotation frequency band, and an information frequency band. Since the output of circuit 2 is modulated with trigonometric function waves (sine wave and cosine wave) having a phase difference of 90 degrees from each other, the receiver can convert the received signals from two spatially orthogonal antennas to the received carrier wave. Using the output (local signal) of the frequency generation circuit 45, the reception mixers 44 and 46 convert the signal into a signal in the polarization rotation frequency band. After that, using the output of the rotary polarization frequency cosine wave generating circuit 51 and the output of the rotary polarization frequency sine wave generating circuit 55, addition circuits 61 and 62 and subtraction circuits 63 and 64 generate a sine wave in the polarization rotation frequency band. Obtain four signal combinations for the sum and difference of the cosine waves. The received signal processing circuit 49 can separate the output of the information digital signal generating circuit 1 and the output of the pilot digital signal generating circuit 2 from the combination of the four signals.

Since the rotational direction of the polarization of the electromagnetic wave of the rotationally polarized wave is reversed for each reflection, as shown in FIG. In an environment where line-of-sight communication is not possible using direct waves between the scatterers and communication is performed using waves reflected by the scatterer, a group of propagation paths with different directions of polarization rotation due to odd-numbered reflections and even-numbered reflections cause polarization rotation. A propagation path group whose direction is maintained can be separated by the rotation direction of polarization.

The serial digital data output from the information digital signal generation circuit 1 and the serial digital data output from the pilot digital signal generation circuit 2 are two bits each, that is, the odd bits and the even bits are left-rotation rotationally polarized waves and right-handed bits. As shown in FIG. 15, the data transmitted with the left-handed circularly polarized wave passes through the propagation path of odd number of reflections and is transmitted with the right-handed circularly polarized wave. Data to be transmitted may reach and be received by the receiver via a propagation path of even number of reflections. Since the receiver 201 cannot know the content of the transmitted information digital signal and the nature of the propagation path (the number of reflections), it cannot reproduce the information digital signal from the received signal. On the other hand, since the receiver 201 knows the content of the pilot signal in advance, it can know the property of the propagation path (the number of reflections) from the received signal using the content of the pilot signal. If the nature of the propagation path, that is, whether it is an odd number of reflections or an even number of reflections, then the information digital signal can be reproduced from the received signal. Here, as described above, the serial digital data output from the information digital signal generation circuit 1 and the serial digital data output from the pilot digital signal generation circuit 2 are orthogonal to each other in the polarization rotation frequency band. If they are sent from the transmitter at the same time, the receiver 201 can separate them in the polarization rotation frequency band.

Therefore, in this embodiment, since the propagation frequency and the rotational frequency of the polarized wave are different in the rotationally polarized wave, a sine wave and a cosine wave that are orthogonal to each other can be realized in the signal in the frequency domain of the rotationally polarized wave. Therefore, by using a plurality of propagation paths formed between the transmitter and the receiver, it is possible to increase the transmission capacity of wireless communication, which can simultaneously transmit two bits of information digital signals. In addition, it is possible to construct a robust wireless system that is resistant to environmental fluctuations.

[Example 2]
In this embodiment, the operation of another radio system in which communication capacity is increased by using a plurality of propagation paths formed between a transmitter and a receiver with the rotationally polarized waves of the present invention will be described with reference to FIG. .

FIG. 2 is a diagram showing another example of the configuration of a radio system in which communication capacity is increased by using a plurality of propagation paths formed between a transmitter and a receiver with rotationally polarized waves according to this embodiment.

The wireless system of this embodiment has a transmitter 102 and a receiver 202 .

The transmitter 102 has an information digital signal generation circuit 1 and a pilot digital signal generation circuit 2 . The output of the information digital signal generation circuit 1 is converted by the first serial/parallel 3-system converter 283 into serial 3-bit outputs of 3 systems. The output of the pilot digital signal generating circuit 2 is converted by the second serial/parallel 3-system converter 284 into serial 3-bit 3-system output.

The output of the first system of the first serial/parallel 3-system converter 283 is branched into two, one of which is sent to the rotary polarized frequency cosine wave generation circuit 15 via the first rotary polarized frequency 90-degree phase shifter 13. is multiplied by the first multiplier 11 and input to the second adder 72 . On the other hand, the output signal of the rotary polarization frequency cosine wave generating circuit 15 is multiplied by the third multiplier 16 and input to the first adder 71 .

The output of the second system of the first serial/parallel 3-system converter 283 is branched into two, one of which is sent to the first rotational polarization frequency cosine wave generation circuit 15 via the first rotational polarization frequency 90-degree phase shifter 13. is multiplied by the thirteenth multiplier 111 and input to the third adder 73 . On the other hand, the output signal of the rotary polarization frequency cosine wave generating circuit 15 is multiplied by the fourteenth multiplier 116 and input to the second adder 72 .

The output of the third system of the first serial/parallel 3-system converter 283 is branched into two, one of which is sent to the first rotary polarization frequency cosine wave generation circuit 15 via the first rotary polarization frequency 90-degree phase shifter 13. is multiplied by the fifteenth multiplier 211 and input to the first adder 71 . On the other hand, the output signal of the rotary polarization frequency cosine wave generating circuit 15 is multiplied by the sixteenth multiplier 216 and input to the third adder 73 .

The output of the first system of the second serial/parallel 3-system converter 284 is branched into two, one of which is sent to the rotary polarized wave frequency sine wave generation circuit 25 via the second rotary polarized wave frequency 90-degree phase shifter 23. is multiplied by the fifth multiplier 21 and input to the fifth adder 82 . The other is multiplied by the output signal of the rotary polarization frequency sine wave generating circuit 25 by the seventh multiplier 26 and input to the fourth adder 81 .

The output of the second system of the second serial/parallel 3-system converter 284 is branched into two, one of which is sent to the rotary polarized frequency sine wave generation circuit 25 via the second rotary polarized frequency 90-degree phase shifter 23. is multiplied by the seventeenth multiplier 121 and input to the sixth adder 83 . The other is multiplied by the output signal of the rotary polarization frequency sine wave generating circuit 25 by the eighteenth multiplier 126 and input to the fifth adder 82 .

The output of the third system of the second serial/parallel 3-system converter 284 is branched into two, one of which is sent to the rotary polarized wave frequency sine wave generation circuit 25 via the second rotary polarized wave frequency 90-degree phase shifter 23. is multiplied by the nineteenth multiplier 221 and input to the fourth adder 81 . The other is multiplied by the output signal of the rotary polarization frequency sine wave generating circuit 25 by the 20th multiplier 226 and input to the sixth adder 83 .

The output of the first adder 71 and the output of the fourth adder 81 are input to the seventh adder 91, and the output of the second adder 72 and the output of the fifth adder 82 are input to the eighth adder. , and the output of the third adder 73 and the output of the sixth adder 83 are input to the ninth adder 93 .

The output of the seventh adder 91 is up-converted by the first transmission mixer 34 using the output signal of the transmission carrier frequency generation circuit 35 and radiated into space from the first transmission antenna 31 . The output of the eighth adder 92 is up-converted by the second transmission mixer 36 using the output signal of the transmission carrier frequency generation circuit 35 and radiated into space from the second transmission antenna 32 . The output of the ninth adder 93 is up-converted by the third transmission mixer 37 using the output signal of the transmission carrier frequency generation circuit 35 and radiated into space from the third transmission antenna 33 . The first transmitting antenna 31, the second transmitting antenna 32, and the third transmitting antenna 33 are arranged so as to be spatially orthogonal to each other.

The receiver 202 has a first receiving antenna 41, a second receiving antenna 42 and a third receiving antenna 43 which are spatially orthogonal to each other.

The output of first receive antenna 41 is downconverted in first receive mixer 44 using the output signal of receive carrier frequency generator circuit 45 . The output of the first receiving mixer 44 is branched into two, one of which is multiplied by the output signal of the rotary polarization frequency cosine wave generating circuit 51 in the first multiplier circuit 52, and the other is the rotary polarization frequency sine wave generating circuit. The output signal of 55 is multiplied by a third multiplier circuit 56 .

The output of second receive antenna 42 is downconverted in second receive mixer 46 using the output signal of receive carrier frequency generator circuit 45 . The output of the second reception mixer 46 is branched into two, one of which is multiplied by the output signal of the rotary polarization frequency cosine wave generation circuit 51 in the second multiplication circuit 53, and the other is the rotary polarization frequency sine wave generation circuit. The output signal of 55 is multiplied in a fourth multiplier circuit 57. FIG.

The output of the third receive antenna 43 is downconverted in the third receive mixer 47 using the output signal of the receive carrier frequency generator circuit 45 . The output of the third reception mixer 47 is branched into two, one of which is multiplied by the output signal of the rotary polarization frequency cosine wave generation circuit 51 in the fifth multiplier circuit 54, and the other is the rotary polarization frequency sine wave generation circuit. The output signal of 55 is multiplied by a sixth multiplier circuit 58 .

The output of the first multiplier circuit 52 and the output of the fourth multiplier circuit 57 are combined by the first adder 161 and input to the received signal processing circuit 49 . The output of the second multiplier circuit 53 and the output of the sixth multiplier circuit 58 are combined by the second adder 162 and input to the received signal processing circuit 49 . The output of the fifth multiplier circuit 54 and the output of the third multiplier circuit 56 are combined by the third adder 163 and input to the received signal processing circuit 49 .

Transmitter 102 converts 0 or 1 digital serial data output from information digital signal generation circuit 1 to 0-bit and 1-bit modulo 3 by first serial/parallel 3-system converter 283. 2-bit signals, and each of the three-bit signals is simultaneously radiated into space as rotationally polarized waves in the same rotational direction propagating in three directions spatially orthogonal to each other. Further, the transmitter 102 transmits the digital serial data of 0 or 1, which is the output of the pilot digital signal generation circuit 2 whose content is shared between the transmitter 102 and the receiver 202 in advance, to the second serial/parallel 3 System converter 284 separates into 0-bit, 1-bit and 2-bit modulo 3, and each of the three-bit signals is propagated in three directions spatially orthogonal to each other in the same rotational direction. simultaneously radiate into space as a rotationally polarized wave of

Rotationally polarized electromagnetic waves have three different frequency bands: a carrier frequency band, a polarization rotation frequency band, and an information frequency band. Since the output of circuit 2 is modulated with trigonometric function waves (sine wave and cosine wave) having a phase difference of 90 degrees with respect to each other, the receiver can convert the received signals from the three spatially orthogonal antennas to the received carrier wave. Using the output (local signal) of the frequency generation circuit 45, reception mixers 44, 46, and 47 convert the signals into signals in the polarization rotation frequency band. After that, using the output of the rotary polarization frequency cosine wave generating circuit 51 and the output of the rotary polarization frequency sine wave generating circuit 55, using adders 161, 162, and 163, independent signals coming from three orthogonal directions are obtained. A signal combination of three independent polarization rotation frequency bands obtained by down-converting the signal at the carrier frequency is obtained. The received signal processing circuit 49 can separate the output of the information digital signal generating circuit 1 and the output of the pilot digital signal generating circuit 2 from the combination of the three signals.

Three independent circularly polarized signals with orthogonal propagation directions transmitted by the transmitter 102 are reflected by electromagnetic wave scatterers existing between the transmitter and the receiver, and are represented by a linear combination of the three signals. As a signal, it is received at receiver 202 . Since the receiver 202 cannot know the contents of the transmitted information digital signal and the information of the propagation paths of the three transmission signals, it cannot reproduce the information digital signal from the received signal. On the other hand, since the receiver 202 knows the contents of the pilot signal in advance, it is possible to know the information of the propagation paths of the three transmission signals from the received signal using the contents of the pilot signal. If the information of the propagation paths of the three transmission signals, ie, the linear combination of the three transmission signals propagating through which propagation path is known, the information digital signal can be reproduced from the received signal. Here, as described above, the serial digital data output from the information digital signal generation circuit 1 and the serial digital data output from the pilot digital signal generation circuit 2 are orthogonal to each other in the polarization rotation frequency band. If they are sent from the transmitter 102 at the same time, the receiver can separate them in the polarization rotation frequency band.

In this embodiment, three bits of the information digital signal can be simultaneously transmitted, so that the transmission capacity of wireless communication can be increased. Communication interruptions are reduced, and in this embodiment, the communication quality is different for the three propagation paths, so the communication quality can be improved by dynamically weighting the three sequences.

[Example 3]
In this embodiment, the operation of another radio system in which communication capacity is increased by using a plurality of propagation paths formed between a transmitter and a receiver with the rotary polarization of the present invention will be described with reference to FIGS. 3 and 4. to explain.

3 and 4 are diagrams showing other examples of the configuration of a radio system that increases communication capacity by using a plurality of propagation paths formed between a transmitter and a receiver with rotationally polarized waves according to the present invention. be.

The radio system of this embodiment has a transmitter 102 shown in FIG. 3 and a receiver 202 shown in FIG.

The transmitter 103 has an information digital signal generation circuit 1 and a pilot digital signal generation circuit 2 . The output of the information digital signal generation circuit 1 is converted by the first serial/parallel 6-system converter 293 into serial 6-bits into 6-system outputs. The output of the pilot digital signal generation circuit 2 is converted from serial 6 bits to 6-system outputs by a second serial/parallel 6-system converter 294 .

The output of the first system of the first serial/parallel 6-system converter 293 is branched into two, one of which is sent to the rotary polarized frequency cosine wave generating circuit 15 via the first rotary polarized frequency 90-degree phase shifter 13. is multiplied by the first multiplier 11 and input to the second adder 72 . The other is multiplied by the output signal of the rotary polarization frequency cosine wave generating circuit 15 by the third multiplier 16 and input to the first adder 71 .

The output of the second system of the first serial-parallel 6-system converter 293 is branched into two, one of which is sent to the first rotary polarization frequency 90-degree phase shifter 13 to the rotary polarization frequency cosine wave generation circuit 15. is multiplied by the thirteenth multiplier 111 and input to the third adder 73 . On the other hand, the output signal of the rotary polarization frequency cosine wave generating circuit 15 is multiplied by the fourteenth multiplier 116 and input to the second adder 72 .

The output of the third system of the first serial-parallel 6-system converter 293 is branched into two, one of which is sent to the first rotary polarization frequency cosine wave generation circuit 15 via the first rotary polarization frequency 90-degree phase shifter 13. is multiplied by the fifteenth multiplier 211 and input to the first adder 71 . On the other hand, the output signal of the rotary polarization frequency cosine wave generating circuit 15 is multiplied by the sixteenth multiplier 216 and input to the third adder 73 .

The output of the fourth system of the first serial/parallel 6-system converter 293 is branched into two, one of which is sent to the first rotary polarization frequency 270-degree phase shifter 318 to the rotary polarization frequency cosine wave generation circuit 15. is multiplied by the twenty-first multiplier 311 and input to the eighth adder 172 . The other is multiplied by the output signal of the rotary polarization frequency cosine wave generating circuit 15 by the 22nd multiplier 316 and input to the seventh adder 171 .

The output of the fifth system of the first serial/parallel 6-system converter 293 is branched into two, one of which is sent to the first rotary polarization frequency 270-degree phase shifter 318 to the rotary polarization frequency cosine wave generation circuit 15. is multiplied by the twenty-third multiplier 411 and input to the ninth adder 173 . On the other hand, the output signal of the rotary polarization frequency cosine wave generating circuit 15 is multiplied by the twenty-fourth multiplier 416 and input to the eighth adder 172 .

The output of the sixth system of the first serial/parallel 6-system converter 293 is branched into two, one of which is sent to the first rotary polarization frequency 270-degree phase shifter 318 to the rotary polarization frequency cosine wave generating circuit 15. is multiplied by the twenty-fifth multiplier 511 and input to the seventh adder 171 . One is multiplied by the output signal of the rotary polarization frequency cosine wave generating circuit 15 by the twenty-sixth multiplier 516 and input to the ninth adder 173 .

The output of the first system of the second serial/parallel 6-system converter 294 is branched into two, one of which is sent to the rotary polarized wave frequency sine wave generation circuit 25 via the second rotary polarized wave frequency 90-degree phase shifter 23. is multiplied by the fifth multiplier 21 and input to the fifth adder 82 . The other is multiplied by the output signal of the rotary polarization frequency sine wave generating circuit 25 by the seventh multiplier 26 and input to the fourth adder 81 .

The output of the second system of the second serial/parallel 6-system converter 294 is branched into two, one of which is sent to the rotary polarized frequency sine wave generation circuit 25 via the second rotary polarized frequency 90-degree phase shifter 23. is multiplied by the seventeenth multiplier 121 and input to the sixth adder 83 . The other is multiplied by the output signal of the rotary polarization frequency sine wave generating circuit 25 by the eighteenth multiplier 126 and input to the fifth adder 82 .

The output of the third system of the second serial/parallel 6-system converter 294 is branched into two, one of which is sent to the rotary polarized wave frequency sine wave generation circuit 25 via the second rotary polarized wave frequency 90-degree phase shifter 23. is multiplied by the nineteenth multiplier 221 and input to the fourth adder 81 . The other is multiplied by the output signal of the rotary polarization frequency sine wave generating circuit 25 by the 20th multiplier 226 and input to the sixth adder 83 .

The output of the fourth system of the second serial/parallel 6-system converter 294 is branched into two, one of which is sent to the rotary polarized frequency sine wave generation circuit 25 via the second rotary polarized frequency 270-degree phase shifter 328. is multiplied by the twenty-seventh multiplier 321 and input to the eleventh adder 182 . The other is multiplied by the output signal of the rotary polarization frequency sine wave generating circuit 25 by the twenty-eighth multiplier 326 and input to the tenth adder 181 .

The output of the fifth system of the second serial/parallel 6-system converter 294 is branched into two, one of which is sent to the rotary polarized frequency sine wave generation circuit 25 via the second rotary polarized frequency 270-degree phase shifter 328. are multiplied by the twenty-ninth multiplier 421 and input to the twelfth adder 183 respectively. The other is multiplied by the 30th multiplier 426 by the output signal of the rotary polarization frequency sine wave generating circuit 25 and input to the 11th adder 182 .

The output of the sixth system of the second serial/parallel 6-system converter 294 is branched into two, one of which is sent to the rotary polarized frequency sine wave generation circuit 25 via the second rotary polarized frequency 270-degree phase shifter 328. is multiplied by the thirty-first multiplier 521 and input to the tenth adder 181 . The other is multiplied by the 32nd multiplier 526 by the output signal of the rotary polarization frequency sine wave generating circuit 25 and input to the 12th adder 183 .

The output of the first adder 71 , the output of the fourth adder 81 , the output of the seventh adder 171 and the output of the tenth adder 181 are input to the first combiner 191 . The outputs of the second adder 72 and the fifth adder 82 , the output of the eighth adder 172 and the output of the eleventh adder 182 are input to the second combiner 192 . The output of the third adder 73 , the output of the sixth adder 83 , the output of the ninth adder 173 and the output of the twelfth adder 183 are input to the third combiner 193 .

The output of the first combiner 191 is up-converted by the first transmission mixer 34 using the output signal of the transmission carrier frequency generation circuit 35 and radiated into space from the first transmission antenna 31 . The output of the second synthesizer 192 is up-converted by the second transmission mixer 36 using the output signal of the transmission carrier frequency generation circuit 35 and radiated into space from the second transmission antenna 32 . The output of the third synthesizer 193 is up-converted by the third transmission mixer 37 using the output signal of the transmission carrier frequency generation circuit 35 and radiated into space from the third transmission antenna 33 . The first transmitting antenna 31, the second transmitting antenna 32, and the third transmitting antenna 33 are arranged so as to be spatially orthogonal to each other.

The receiver 203 shown in FIG. 4 has a first receiving antenna 41, a second receiving antenna 42 and a third receiving antenna 43 which are spatially orthogonal to each other.

The output of first receive antenna 41 is downconverted in first receive mixer 44 using the output signal of receive carrier frequency generator circuit 45 . The output of the first receiving mixer 44 is branched into two, one of which is multiplied by the output signal of the rotary polarization frequency cosine wave generating circuit 51 in the first multiplier circuit 52, and the other is the rotary polarization frequency sine wave generating circuit. The output signal of 55 is multiplied by a third multiplier circuit 56 . The output of the first multiplication circuit 52 is branched into two, one of which is input to the first adder 261 and the other is input to the sixth adder 266 . The output of the third multiplication circuit 56 is branched into two, one of which is input to the third adder 263 and the other is input to the fourth adder 264 .

The output of second receive antenna 42 is downconverted in second receive mixer 46 using the output signal of receive carrier frequency generator circuit 45 . The output of the second reception mixer 46 is branched into two, one of which is multiplied by the output signal of the rotary polarization frequency cosine wave generation circuit 51 in the second multiplication circuit 53, and the other is the rotary polarization frequency sine wave generation circuit. The output signal of 55 is multiplied in a fourth multiplier circuit 57. FIG. The output of the second multiplication circuit 53 is branched into two, one of which is input to the second adder 262 and the other is input to the fourth adder 264 . The output of the fourth multiplication circuit 57 is branched into two, one of which is input to the first adder 261 and the other is input to the fifth adder 265 .

The output of the third receive antenna 43 is downconverted in the third receive mixer 47 using the output signal of the receive carrier frequency generator circuit 45 . The output of the third reception mixer 47 is branched into two, one of which is multiplied by the output signal of the rotary polarization frequency cosine wave generation circuit 51 in the fifth multiplier circuit 54, and the other is the rotary polarization frequency sine wave generation circuit. The output signal of 55 is multiplied by a sixth multiplier circuit 58 . The output of the fifth multiplier circuit 54 is branched into two, one of which is input to the third adder 263 and the other is input to the fifth adder 265 . The output of the sixth multiplier circuit 58 is branched into two, one of which is input to the second adder 262 and the other is input to the sixth adder 266 .

The output of the first adder 261, the output of the second adder 262, the output of the third adder 263, the output of the fourth adder 264, the output of the fifth adder 265, and the sixth adder The H.266 output is input to the received signal processing circuit 49 .

The transmitter 103 converts the digital serial data of 0 or 1, which is the output of the information digital signal generation circuit 1, into 0-bit and 1-bit modulo 6 by the first serial/parallel 6-system converter 293. Separated into 2-bit, 3-bit, 4-bit, and 5-bit signals, each of the 6-bit signals is propagated in three directions spatially orthogonal to each other with left-rotation rotational polarization and right-rotation polarization. Simultaneously radiate into space as a rotationally polarized wave. Further, the transmitter 103 transmits the digital serial data of 0 or 1, which is the output of the pilot digital signal generation circuit 2 whose content is shared between the transmitter 103 and the receiver 203 in advance, to the second serial/parallel 6 System converter 294 separates into 0-bit, 1-bit, 2-bit, 3-bit, 4-bit and 5-bit modulo 6, and each of the 6-bit signals is spatially separated from each other. It radiates into space simultaneously as a left-handed circularly polarized wave and a right-handed circularly polarized wave propagating in three directions orthogonal to each other.

A rotationally polarized wave is an electromagnetic wave whose polarization rotates at a frequency orthogonal to the propagation direction and different from the propagation frequency. Generally, in a three-dimensional space, the traveling directions of radio waves have three components that are orthogonal to each other, so three orthogonally rotating polarized waves in the same rotational direction can exist in the space. Also, since the rotationally polarized waves in different rotational directions are independent of each other, a total of six independent rotationally polarized waves can exist in space. Since the direction of rotation of a circularly polarized wave is reversed by one reflection, the propagation paths generated by the reflections at multiple devices between the transmitter and the receiver are divided into a group of odd-numbered reflections and an even-numbered reflection. Propagation path groups can be separated and identified. Therefore, the plurality of propagation paths formed between the transmitter and the receiver are expressed as a combination of up to three independent propagation paths for each of the odd-numbered reflections and the even-numbered reflections. Therefore, a plurality of propagation paths formed between the transmitter and the receiver can be used as a set of six mutually independent propagation paths.

Furthermore, since the propagation frequency and the rotational frequency of the polarized wave are different in the rotationally polarized wave, a sine wave and a cosine wave that are orthogonal to each other in the frequency domain of the rotationally polarized wave can be realized in the signal. As a result, the radio transmission capacity can be increased by using six of the many propagation paths formed between the transmitter and the receiver. Furthermore, since the communication capacity can be increased by up to two times in the frequency domain, the wireless communication capacity using the propagation path formed by the reflection of equipment where line-of-sight communication cannot be expected can be increased by one order of magnitude or more at the maximum.

Rotationally polarized electromagnetic waves have three different frequency bands: a carrier frequency band, a polarization rotation frequency band, and an information frequency band. Since the output of circuit 2 is modulated with trigonometric function waves (sine wave and cosine wave) having a phase difference of 90 degrees with respect to each other, the receiver can convert the received signals from the three spatially orthogonal antennas to the received carrier wave. Using the output (local signal) of the frequency generation circuit 45, reception mixers 44, 46, and 47 convert the signals into signals in the polarization rotation frequency band. After that, using the output of the rotary polarization frequency cosine wave generation circuit 51 and the output of the rotary polarization frequency sine wave generation circuit 55, orthogonal A combination of six independent polarization rotation frequency band signals obtained by down-converting independent left-rotation and right-rotation polarization signals arriving from three directions at the carrier frequency is obtained. The output of the information digital signal generating circuit 1 and the output of the pilot digital signal generating circuit 2 can be separated by the received signal processing circuit 49 from the combination of the six signals.

Three independent circularly polarized signals with orthogonal propagation directions transmitted by the transmitter 103 are reflected by electromagnetic wave scatterers existing between the transmitter and the receiver, and are represented by a linear combination of the three signals. It is received by the receiver 203 as a signal. Since the receiver 203 cannot know the contents of the transmitted information digital signal and the information of the propagation paths of the three transmission signals, it cannot reproduce the information digital signal from the received signal. On the other hand, since the receiver 203 knows the contents of the pilot signal in advance, it is possible to know the information of the propagation paths of the three transmission signals from the received signal using the contents of the pilot signal. If the information of the propagation paths of the three transmission signals, ie, the linear combination of the three transmission signals propagating through which propagation path is known, the information digital signal can be reproduced from the received signal. Here, as described above, the serial digital data output from the information digital signal generation circuit 1 and the serial digital data output from the pilot digital signal generation circuit 2 are orthogonal to each other in the polarization rotation frequency band. If they are sent from the transmitter 103 at the same time, the receiver 203 can separate them in the polarization rotation frequency band.

In addition, data transmitted with left-handed circular polarization passes through the propagation path with odd number of reflections, and data transmitted with right-handed circular polarization reaches the receiver via the propagation path with even number of reflections. may be received as Since the receiver 203 cannot know the content of the transmitted information digital signal and the nature of the propagation path (the number of reflections), it cannot reproduce the information digital signal from the received signal. On the other hand, since the receiver 203 knows the content of the pilot signal in advance, it can know the properties of the propagation path (the number of reflections) from the received signal using the content of the pilot signal. If the nature of the propagation path, that is, whether it is an odd number of reflections or an even number of reflections, then the information digital signal can be reproduced from the received signal.

In this embodiment, the information digital signal can be simultaneously transmitted in units of 6 bits, so that the transmission capacity of wireless communication can be increased.

[Example 4]
In this embodiment, the operation of another transmitter used in a radio system in which communication capacity is increased by using a plurality of propagation paths formed between a transmitter and a receiver with the rotationally polarized waves of the present invention will be described with reference to FIG. will be used to explain.

FIG. 5 shows another configuration example of a transmitter used in another radio system in which communication capacity is increased by using a plurality of propagation paths formed between a transmitter and a receiver with the rotary polarization of the present invention. FIG. 4 is a diagram showing;

Unlike the transmitter 101 shown in FIG. 1, the transmitter 104 of this embodiment is different from the transmitter 101 shown in FIG. and a second fixed pilot signal generator 6 . The output of first fixed pilot signal generator 5 is input to fifth multiplier 21 and seventh multiplier 26 . The output of second fixed pilot signal generator 6 is input to sixth multiplier 22 and eighth multiplier 27 .

Compared with the embodiment shown in FIG. 1, this embodiment can reduce data related to pilot signals shared between the transmitter and the receiver, and can reduce the size of the wireless device and power consumption.

[Example 5]
In this embodiment, the operation of another transmitter used in a radio system in which communication capacity is increased by using a plurality of propagation paths formed between a transmitter and a receiver with the rotationally polarized waves of the present invention will be described with reference to FIG. will be used to explain.

FIG. 6 is a diagram showing another configuration example of a transmitter used in a radio system in which communication capacity is increased by using a plurality of propagation paths formed between a transmitter and a receiver using the rotary polarized waves of the present invention. is.

Unlike the transmitter 101 shown in FIG. 1, the transmitter 105 of this embodiment has a first fixed pilot signal generator array instead of the pilot digital signal generation circuit 2 and the second serial/parallel 2-system converter 4. 605 and a second fixed pilot signal generator array 606 . A plurality of fixed pilot signal data are stored in each of the signal generator arrays 605 and 606 , and the pilot signal data are switched by the first pilot signal data switcher 601 and the second pilot signal data switcher 602 . The transmission baseband circuit 9 controls switching of each pilot signal data.

In this embodiment, since a plurality of pilot signals are used, a plurality of destination wireless devices can be selected. For example, a parent radio shares specific pilot signal data with a child radio that is a potential communication destination. Child radios only know the specific pilot signal data. In this case, by transmitting data using specific pilot signal data, the parent radio will be in a state where other radios that do not share the pilot signal data cannot reproduce the transmitted data, and the specific radio can communicate with As a result, it is possible to improve communication security in a wireless system that communicates with a plurality of wireless devices.

[Example 6]
In this embodiment, the operation of another transmitter used in a radio system in which communication capacity is increased by using a plurality of propagation paths formed between a transmitter and a receiver with the rotationally polarized waves of the present invention will be described with reference to FIG. will be used to explain.

FIG. 7 is a diagram showing a configuration example of another transmitter used in a radio system in which communication capacity is increased by using a plurality of propagation paths formed between a transmitter and a receiver with the rotary polarization of the present invention. is.

The transmitter 106 of this embodiment has a data sequence switcher 603, unlike the transmitter 101 shown in FIG. The data sequence switcher 603 is controlled by the transmission baseband circuit 9 to switch the series of data strings generated by the information digital signal generation circuit 1 and the data strings generated by the pilot digital signal generation circuit 2 to the first serial/parallel It is supplied by switching to the 2-system converter 3 and the second serial/parallel 2-system converter 4 .

In order to generate the rotational polarization, the data train generated by the information digital signal generation circuit 1 and the data train generated by the pilot digital signal generation circuit 2 contain a constant sequence of sine waves or cosine waves at the frequency of polarization rotation. are superimposed according to Therefore, depending on the nature of the data string, the signal to be transmitted using electromagnetic waves may have a DC component. Since the high-frequency circuit (amplifier and mixer) of the receiver that receives the electromagnetic wave has a finite dynamic range, if the electromagnetic wave that is superimposed and transmitted has a DC component, the received signal may be distorted. It causes deterioration of quality.

In this embodiment, polarization for forming a rotationally polarized wave in the data train generated by the information digital signal generation circuit 1 and the data train generated by the pilot digital signal generation circuit 2 is performed in an appropriate sequence (for example, at random timing). Since the wave rotation frequency is switched between a sine wave and a cosine wave, it is possible to remove the DC component of the signal to be transmitted using electromagnetic waves regardless of the characteristics of the data string, suppress the distortion of the received signal due to the high frequency receiving circuit, and improve the communication quality. You can improve.

[Example 7]
In this embodiment, the operation of another transmitter used in a radio system in which communication capacity is increased by using a plurality of propagation paths formed between a transmitter and a receiver with the rotationally polarized waves of the present invention will be described with reference to FIG. will be used to explain.

FIG. 8 is a diagram showing another configuration example of a transmitter used in a wireless system in which communication capacity is increased by using a plurality of propagation paths formed between a transmitter and a receiver with the rotary polarization of the present invention. is.

Unlike the transmitter 101 shown in FIG. 1, the transmitter 107 of this embodiment has a first changeover switch 607 and a second changeover switch 608 controlled by the synchronization signal generating circuit 8 and the transmission baseband circuit 9 . A first changeover switch 607 switches between the information digital signal generation circuit 1 and the synchronization signal generation circuit 8 , and a second changeover switch 608 switches between the pilot digital signal generation circuit 2 and the synchronization signal generation circuit 8 . The data string of the digital signal generated by the synchronizing signal generating circuit 8 generally uses a data string with high autocorrelation.

The synchronizing signal generated by the synchronizing signal generating circuit 8 needs only to be at the same place in the two data strings of the information digital signal and the pilot signal. It may be inserted at the same place in the data string generated by the circuit 1 and the data string generated by the pilot digital signal generation circuit 2 .

As a result, the transmitter and receiver can easily synchronize with each other by using a shared data string with strong autocorrelation. In communication using a circularly polarized wave, by precisely controlling the phase of the circularly polarized wave, it is possible to increase the accuracy of the orthogonality between the left-handed circularly polarized wave and the right-handed circularly-polarized wave. Independence can be improved between polarized waves and right-handed rotationally polarized waves. As a result, it is possible to improve the separation accuracy of the data generated by the information digital signal generation circuit 1 which is simultaneously multiplexed and transmitted from the received signal, thereby improving the communication quality of the radio system.

[Example 8]
In this embodiment, the operation of another radio used in a radio system in which communication capacity is increased by using a plurality of propagation paths formed between a transmitter and a receiver with the rotationally polarized waves of the present invention will be described with reference to FIG. will be used to explain.

FIG. 9 is a diagram showing a configuration example of a radio device used in a radio system in which communication capacity is increased by using a plurality of propagation paths formed between a transmitter and a receiver with the rotationally polarized waves of the present invention. .

The radio device 301 of this embodiment includes the first transmitting antenna 31, the second transmitting antenna 32, the first receiving antenna 41, and the second receiving antenna 42 in the transmitter 101 and the receiver 201 shown in FIG. , the first circulator 701 and the second circulator 702 are used to integrate the first shared transmission/reception antenna 131 and the second shared transmission/reception antenna 132 . Also, the first transmit mixer 34 , the second transmit mixer 36 , the first receive mixer 44 and the second receive mixer 46 are integrated into the first high frequency mixer 134 and the second high frequency mixer 136 . Further, the transmit carrier frequency generator circuit 35 and the receive carrier frequency generator circuit 45 are integrated into the carrier frequency generator circuit 135 .

A first RF mixer 134 is coupled to the first terminal of the first circulator 701 and a second RF mixer 136 is coupled to the first terminal of the second circulator 702 . A local signal having a carrier frequency is supplied to the first high frequency mixer 134 and the second high frequency mixer 136 by a carrier frequency generation circuit 135 . A second terminal of first circulator 701 is coupled to the output of first combiner 18 and a second terminal of second circulator 702 is coupled to the output of second combiner 28 . A first multiplication circuit 52 and a third multiplication circuit 56 are connected in parallel to the third terminal of the first circulator 701 , and the second multiplication circuit 53 and the fourth multiplication circuit are connected to the third terminal of the second circulator 702 . are connected in parallel. The circulator transmits signals in the order of terminal 1→terminal 2→terminal 3. FIG.

In this embodiment, the antenna and the analog front end section (mixer, carrier wave generation circuit) are shared by the transmitter and the receiver, and the functions of the transmitter 101 and the receiver 201 shown in FIG. 1 can be realized. The machine can be made smaller and power consumption can be reduced.

[Example 9]
In this embodiment, the operation of another radio device used in a radio system in which communication capacity is increased by using a plurality of propagation paths formed between a transmitter and a receiver with the rotationally polarized waves of the present invention will be described with reference to FIG. will be used to explain.

FIG. 10 is a diagram showing another configuration example of a radio used in a radio system in which communication capacity is increased by using a plurality of propagation paths formed between a transmitter and a receiver with rotationally polarized waves according to the present invention. is.

The radio 302 of this embodiment differs from the radio 301 shown in FIG. It has two high frequency switches 704 .

Unlike the embodiment shown in FIG. 8, this embodiment does not use a large, heavy, and expensive circulator having a magnetic circuit. A high-frequency switch using a lightweight and inexpensive semiconductor device enables time-division operation of transmission and reception. Therefore, it is possible to reduce the size and weight of the wireless device and reduce the cost.

[Example 10]
In this embodiment, the operation of another radio used in a radio system in which communication capacity is increased by using a plurality of propagation paths formed between a transmitter and a receiver with the rotational polarization of the present invention will be described with reference to FIG. will be used to explain.

FIG. 11 is a diagram showing another configuration example of a radio used in a radio system in which communication capacity is increased by using a plurality of propagation paths formed between a transmitter and a receiver with rotationally polarized waves according to the present invention. is.

Unlike the radio 302 shown in FIG. 10, the radio 303 of this embodiment supplies a data string obtained from the received signal by the received signal processing circuit 49 to the reception characteristics digital signal output circuit 78 via the data bus 76. , the output of the pilot digital signal generation circuit 2 and the output of the reception characteristics digital signal output circuit 78 are switched by a digital signal selector switch 77 .

In this embodiment, the radio device 303 on the transmitting side first switches the digital signal selector switch 77 to the side of the pilot digital signal generation circuit 2, and converts the pilot signal output from the pilot digital signal generation circuit 2 using a rotationally polarized wave. Send. The wireless device 303 on the receiving side also performs the same operation.

The transmitter-side and receiver-side radios 303 can obtain information about the propagation path formed between the two radios 303 when restoring the pilot digital signal from the received signal. This propagation path information is common to both wireless devices 303 and is unknown to other wireless devices 303 having different positional relationships.

Subsequently, in the transmitter-side and receiver-side radios 303, the received signal processing circuit 49 generates a new digital signal from the obtained propagation path information according to a predetermined procedure shared between the radios. do. The generated digital signal is stored in the reception characteristic digital signal output circuit 78 via the data bus 76 .

Subsequently, the digital signal selector switch 77 is switched to the reception characteristic digital signal output circuit 78 side, and instead of the pilot signal output from the pilot digital signal generation circuit 2, the output of the reception characteristic digital signal output circuit 78 is rotated. Send using This digital signal can be known only by both wireless devices 303 during communication, and both wireless devices 303 can transmit the information of the information digital signal generation circuit 1 to the other party with high communication security.

In this embodiment, security during information signal transmission can be improved, and analysis of wireless information transmission in a wireless system can be made difficult.

[Example 11]
In this embodiment, the operation of another radio used in a radio system in which communication capacity is increased by using a plurality of propagation paths formed between a transmitter and a receiver with the rotational polarization of the present invention will be described with reference to FIG. will be used to explain.

FIG. 12 is a diagram showing another configuration example of a radio used in a radio system in which communication capacity is increased by using a plurality of propagation paths formed between a transmitter and a receiver with rotationally polarized waves according to the present invention. is.

The radio 304 of the present embodiment differs from the radio 303 shown in FIG. 11 in that the digital signal selector switch 75 switches between the output of the information digital signal generation circuit 1 and the output of the pilot digital signal generation circuit 2 to switch between the output of the information digital signal generator 1 and the output of the pilot digital signal generator 2. The output of the reception characteristic digital signal output circuit 78 is always supplied to the second serial/parallel 2-system converter 4 .

In this embodiment, since the output signal of the pilot digital signal generation circuit 2 and the output signal of the reception characteristic digital signal output circuit 78 can be simultaneously transmitted from both radios 304 during communication, by comparing these two reception results, , changes in the radio environment surrounding both radios 304 can be measured. That is, the output of the pilot digital signal generation circuit 2 and the output of the reception characteristic digital signal output circuit 78 are simultaneously received, and the output of the pilot digital signal generation circuit 2 and the output of the reception characteristic digital signal output circuit 78 are restored from the received signal. If the results are different, it means that the radio environment surrounding both radios 304 has fluctuated. Output restoration accuracy may be degraded. In such a case, the radio transmission of information signals can be temporarily stopped to maintain the resilience of radio communication. In general, when the radio environment surrounding radio equipment fluctuates greatly, natural or artificial non-stationary phenomena are expected to occur, and important data transmission during such non-stationary phenomena is potentially Considered to be a high risk.

In this embodiment, wireless communication can be performed while checking the surrounding environment during data transmission, and security during information signal transmission can be improved.

[Example 12]
In this embodiment, FIG. 13 shows an application example of a radio device used in a radio system in which communication capacity is increased by using a plurality of propagation paths formed between a transmitter and a receiver with the rotationally polarized waves of the present invention. will be used for explanation.

FIG. 13 shows a configuration example of an elevator monitoring and control system to which a wireless system that increases communication capacity by using a plurality of propagation paths formed between a transmitter and a receiver by rotating polarized waves of the present invention is applied. It is a diagram.

In the elevator monitoring/control system 1100 of the present embodiment, a plurality of elevator cars 1111 move up and down inside a building 1101 in which elevators are installed. A two-orthogonal polarized wave integrated antenna 1102 having a transmission function by rotary polarized waves is installed on the floor and ceiling inside the building 1101 , and the antenna 1102 is coupled to a base station rotary polarized radio 1103 . Two orthogonally polarized integrated antennas 1112 are installed on the outer upper surface and the outer lower surface of the elevator car 1111 and are connected to a wireless terminal 1113 using a high frequency cable 1114 . Since the communication between the base station rotary polarization radio 1103 and the radio terminal 1113 propagates inside the building 1101, the electromagnetic waves are multiply reflected by the inner wall of the building 1101 and the outer wall of the elevator car 1111, and the plurality of radio terminals When the electromagnetic wave transmitted by 1113 reaches the base station rotary polarization radio 1103, the polarization is different. Further, since the elevator car 1111 changes its position, the polarization of the electromagnetic wave reaching the base station rotary polarization radio 1103 from the radio terminal 1113 changes each time the elevator stops.

In this embodiment, by executing the processing in the radio channel measurement mode and the processing in the data transmission mode within the time period during which the relative positions of the base station rotary polarization radio 1103 and the radio terminal 1113 are fixed, position In an elevator system in which it is difficult to predict , wireless communication can be performed with high reliability between the base station rotary polarized radio 1103 and the wireless terminal 1113 . Therefore, the elevator car 1111 can be remotely controlled and monitored from the building 1101 without using a wired connection means. Therefore, the same transportation capacity can be achieved with a smaller building volume without the need for wired connection means such as cables, or the elevator size can be increased with the same building volume to improve the transportation capacity.

[Example 13]
In this embodiment, FIG. 14 shows an application example of a radio device used in a radio system in which communication capacity is increased by using a plurality of propagation paths formed between a transmitter and a receiver with the rotationally polarized waves of the present invention. will be used for explanation.

FIG. 14 shows a configuration example of a substation equipment monitoring and control system to which a wireless system that increases communication capacity by using a plurality of propagation paths formed between a transmitter and a receiver by rotating polarized waves of the present invention is applied. FIG. 4 is a diagram showing;

A substation equipment monitoring/control system 1200 of this embodiment has a plurality of substations 1201, and each of the substations 1201 is provided with a wireless terminal 1203 and a dual orthogonal polarization integrated antenna 1202 coupled thereto. A radio base station 1211 is installed in the vicinity of a plurality of transformers 1201. To the radio base station 1211, a rotary polarized radio 1213 for transmitting and receiving rotary polarized waves of the present invention and a dual orthogonal polarized integrated antenna 1212 are coupled. is installed.

Transformer 1201 is several meters in size, which is larger than the wavelength of electromagnetic waves with frequencies of several hundred MHz to several GHz used by wireless devices. A wave interference environment is formed. A transmission wave from a wireless terminal 1203 installed in each transformer 1201 reaches a rotary polarization wireless device 1213 of a wireless base station 1211 with different polarized waves.

In this embodiment, highly reliable wireless communication can be performed between the rotary polarized radio 1213 and the plurality of wireless terminals 1203, and the wireless communication by the wireless device of the present invention can be performed without using a wired connection means. The connection means can be used to remotely control and monitor transformer 1201 . Therefore, it is possible to solve the problem of high voltage induction power when using a wired connection means such as a cable, and reduce the cost of laying cables. Therefore, the safety of the control/monitoring system of the substation 1201 can be improved, and the cost can be reduced.

It should be noted that the present invention is not limited to the embodiments described above, but includes various modifications and equivalent configurations within the scope of the appended claims. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and the present invention is not necessarily limited to those having all the described configurations. Also, part of the configuration of one embodiment may be replaced with the configuration of another embodiment. Moreover, the configuration of another embodiment may be added to the configuration of one embodiment. Further, additions, deletions, and replacements of other configurations may be made for a part of the configuration of each embodiment.

In addition, each configuration, function, processing unit, processing means, etc. described above may be realized by hardware, for example, by designing a part or all of them with an integrated circuit, and the processor realizes each function. It may be realized by software by interpreting and executing a program to execute.

Information such as programs, tables, and files that implement each function can be stored in storage devices such as memories, hard disks, SSDs (Solid State Drives), or recording media such as IC cards, SD cards, and DVDs.

In addition, the control lines and information lines indicate those considered necessary for explanation, and do not necessarily indicate all the control lines and information lines necessary for mounting. In practice, almost all configurations may be considered interconnected.

Reference Signs List 1 Information digital signal generation circuit 2 Pilot digital signal generation circuit 3 First serial/parallel 2-system converter 4 Second serial/parallel 2-system converter 5 First fixed pilot signal generator 6 Second fixed pilot signal generator 8 Synchronization signal generator 9 Transmit baseband circuit 11 First multiplier 12 Second multiplier 13 First rotary polarization frequency 90-degree phase shifter 14 First rotary polarization frequency 270-degree phase shifter 15 Rotary polarization frequency cosine wave generating circuit 16 Third multiplier 17 Fourth multiplier 18 First combiner 21 Fifth multiplier 22...Sixth multiplier 23...Second rotary polarization frequency 90-degree phase shifter 24...Second rotary polarization frequency 270-degree phase shifter 25...Rotational polarization frequency sine wave generating circuit 26...Seventh Multiplier 27 Eighth multiplier 28 Second combiner 31 First transmission antenna 32 Second transmission antenna 33 Third transmission antenna 34 First transmission mixer 35 Transmission carrier frequency generation Circuit 36 Second transmitting mixer 37 Third transmitting mixer 41 First receiving antenna 42 Second receiving antenna 43 Third receiving antenna 44 First receiving mixer 45 Receiving carrier wave frequency generating circuit 46... Second receiving mixer 47... Third receiving mixer 49... Received signal processing circuit 51... Rotary polarization frequency cosine wave generating circuit 52... First multiplication circuit 53... Second multiplication circuit 54... Fifth multiplication Circuit 55... Rotary polarization frequency sine wave generating circuit 56... Third multiplication circuit 57... Fourth multiplication circuit 58... Sixth multiplication circuit 61... First addition circuit 62... Second addition circuit 63... First Subtraction circuit 64 Second subtraction circuit 71 First adder 72 Second adder 73 Third adder 75 Digital signal selector switch 76 Data bus 77 Digital signal selector switch 78 Receive Characteristic digital signal output circuit 79 Baseband circuit 81 Fourth adder 82 Fifth adder 83 Sixth adder 91 Seventh adder 92 Eighth adder 93 Ninth Adders 101, 102, 103, 104, 105, 106, 107...Transmitter 111...13th multiplier 116...14th multiplier 121...17th multiplier 126...18th multiplier Reference Signs List 131 First common transmission/reception antenna 132 Second common transmission/reception antenna 134 First high-frequency mixer 135 Carrier wave frequency generating circuit 136 Second high-frequency mixer 161 First adder 162 Second adder 163... Third adder 171... Seventh adder 172... Eighth adder 173... Ninth adder 181... Tenth Adder 182... eleventh adder 183... twelfth adder 191... first combiner 192... second combiner 193... third combiners 201, 202, 203... receiver 211... 15th multiplier 216... 16th multiplier 221... 19th multiplier 226... 20th multiplier 261... first adder 262... second adder 263... third addition Unit 264 Fourth adder 265 Fifth adder 266 Sixth adder 283 First serial-parallel three-system converter 284 Second serial-parallel three-system converter 293 First Serial/parallel 6-system converter 294 Second serial/parallel 6-system converters 301, 302, 303, 304 Wireless device 311 21st multiplier 316 22nd multiplier 318 First rotary polarization frequency 270-degree phase shifter 321...27th multiplier 326...28th multiplier 411...23rd multiplier 416...24th multiplier 421... 29th multiplier 426... 30th multiplier 511... 25th multiplier 516... 26th multiplier 521... 31st multiplier 526... 32nd multiplication 601 First pilot signal data switcher 602 Second pilot signal data switcher 603 Data sequence switcher 605 First fixed pilot signal generator array 606 Second fixed pilot signal generator array 607 First selector switch 608 Second selector switch 701 First circulator 702 Second circulator 703 First high-frequency switch 704 Second high-frequency switch 1100 Elevator monitoring/control system 1101 Building 1102 2 orthogonal polarized integrated antennas 1103 Base station rotating polarized radio 1111 Elevating basket 1112 2 orthogonal polarized integrated antennas 1113 Wireless terminal 1114 High frequency cable 1200 Substation equipment monitoring and control system 1201 Substation 1202 ... 2 orthogonal polarization integrated antennas 1203 ... wireless terminal 1211 ... wireless base station 1212 ... 2 orthogonal polarization integrated antennas 1213 ... rotary polarized radio

Claims (13)

a radio system,
A transmitter that transmits information data and a receiver that receives the information data transmitted from the transmitter,
each of the transmitter and the receiver has a plurality of antennas whose planes of polarization are not parallel to each other;
The transmitter is
Converting one series of serial information data into two series of parallel data,
quadrature modulating the converted parallel data;
1. A radio system characterized by simultaneously transmitting said orthogonally modulated two-sequence parallel data from said plurality of antennas using rotationally polarized waves with different rotational directions. a radio system,
A transmitter that transmits information data and a receiver that receives the information data transmitted from the transmitter,
each of the transmitter and the receiver has a plurality of antennas whose planes of polarization are not parallel to each other;
The transmitter is
Converting one series of serial information data into three series of parallel data,
quadrature modulating the converted parallel data;
1. A radio system characterized by simultaneously transmitting said orthogonally modulated three-sequence parallel data from said plurality of antennas using three rotationally polarized waves whose propagation directions are not parallel to each other. a radio system,
A transmitter that transmits information data and a receiver that receives the information data transmitted from the transmitter,
each of the transmitter and the receiver has a plurality of antennas whose planes of polarization are not parallel to each other;
The transmitter is
Converting one series of serial information data into six series of parallel data,
quadrature modulating the converted parallel data;
The six-sequence parallel data orthogonally modulated by using three left-handed circularly polarized waves whose propagation directions are not parallel to each other and three right-handed circularly polarized waves whose propagation directions are not parallel to each other. are simultaneously transmitted from the plurality of antennas. a radio system,
A transmitter that transmits information data and a receiver that receives the information data transmitted from the transmitter,
each of the transmitter and the receiver has a plurality of antennas whose planes of polarization are not parallel to each other;
The transmitter is
Converting one series of serial information data into multiple series of parallel data,
Quadrature modulating the converted parallel data using a cosine wave and a sine wave of the same frequency as the frequency of polarization rotation,
1. A wireless system characterized by simultaneously transmitting said quadrature-modulated multiple-sequence parallel data from said plurality of antennas using two or more circularly polarized waves whose propagation directions are not parallel or whose rotation directions are different. a radio system,
A transmitter that transmits information data and a receiver that receives the information data transmitted from the transmitter,
each of the transmitter and the receiver has a plurality of antennas whose planes of polarization are not parallel to each other;
The transmitter and the receiver share the contents of pilot data in advance,
The transmitter is
Converting one series of serial information data into multiple series of parallel data,
quadrature modulating the converted parallel data and the pilot data,
Simultaneously transmitting from the plurality of antennas the quadrature-modulated multiple-sequence parallel data and the pilot data using two or more rotationally polarized waves whose propagation directions are not parallel or whose rotation directions are different,
The receiver is
orthogonally demodulating the received signal to separate and restore parallel data and pilot data;
Using the information of the restored pilot data, separating the parallel data of the plurality of sequences into data of each sequence,
A wireless system, wherein the serial information data of the one series is restored. a radio system,
A transmitter that transmits information data and a receiver that receives the information data transmitted from the transmitter,
each of the transmitter and the receiver has a plurality of antennas whose planes of polarization are not parallel to each other;
The transmitter and the receiver share the contents of pilot data in advance,
The transmitter is
Converting one series of serial information data into multiple series of parallel data,
quadrature modulating the converted parallel data and the pilot data,
The six-sequence parallel data orthogonally modulated by using three left-handed circularly polarized waves whose propagation directions are not parallel to each other and three right-handed circularly polarized waves whose propagation directions are not parallel to each other. and the pilot data simultaneously from the plurality of antennas,
The receiver is
orthogonally demodulating the received signals of left-handed circularly polarized waves in three orthogonal propagation directions and three right-handed circularly polarized waves in propagation directions to separate and restore parallel data and pilot data;
Using the information of the restored pilot data, separating the parallel data of the plurality of sequences into data of each sequence,
A wireless system, wherein the serial information data of the one series is restored. A wireless system according to claim 5,
A wireless system, wherein the transmitter is a transmitter/receiver having the function of the receiver. a radio system,
A transmitter that transmits information data and a receiver that receives the information data transmitted from the transmitter,
each of the transmitter and the receiver has a plurality of antennas whose planes of polarization are not parallel to each other;
the transmitter is a transceiver having the function of the receiver;
The transmitter and the receiver share the content of pilot data in advance,
The transmitter is
Converting one series of serial information data into multiple series of parallel data,
quadrature modulating the converted parallel data and the pilot data,
Simultaneously transmitting from the plurality of antennas the orthogonally modulated plurality of sequences of parallel data using two or more rotationally polarized waves whose propagation directions are not in a parallel relationship or whose rotation directions are different,
A wireless system, wherein the pilot data is created using a signal received from a facing transmitter. a radio system,
A transmitter that transmits information data and a receiver that receives the information data transmitted from the transmitter,
each of the transmitter and the receiver has a plurality of antennas whose planes of polarization are not parallel to each other;
The transmitter is
Converting one series of serial information data into multiple series of parallel data,
quadrature modulating the converted parallel data and pilot data;
Simultaneously transmitting from the plurality of antennas the orthogonally modulated plurality of sequences of parallel data using two or more rotationally polarized waves whose propagation directions are not in a parallel relationship or whose rotation directions are different,
A wireless system having a function of switching synchronization signal data including serial information data having strong autocorrelation from said parallel data and pilot data for transmission. An elevator monitoring and control system using a wireless system according to any one of claims 1 to 9. A substation equipment monitoring/control system using the wireless system according to any one of claims 1 to 9. A wireless communication method for transmitting information data between a transmitter and a receiver,
each of the transmitter and the receiver has a plurality of antennas whose planes of polarization are not parallel to each other;
The transmitter and the receiver share the contents of pilot data in advance,
The wireless communication method includes:
The transmitter converts one series of serial information data into multiple series of parallel data,
The transmitter orthogonally modulates the converted parallel data and the pilot data,
The transmitter uses two or more rotationally polarized waves whose propagation directions are not parallel or whose rotational directions are different to transmit the parallel data of the plurality of orthogonally modulated sequences and the pilot data from the plurality of antennas at the same time. send and
The receiver orthogonally demodulates the received signal, separates and restores parallel data and pilot data, and separates the plurality of series of parallel data into each series of data using the information of the restored pilot data. and restoring said one series of serial information data. A wireless communication method for transmitting information data between a transmitter and a receiver,
each of the transmitter and the receiver has a plurality of antennas whose planes of polarization are not parallel to each other;
The wireless communication method includes:
The transmitter converts one series of serial information data into multiple series of parallel data,
The transmitter orthogonally modulates the converted parallel data and pilot data,
The transmitter uses two or more rotationally polarized waves whose propagation directions are not parallel or whose rotational directions are different to transmit the parallel data of the plurality of orthogonally modulated sequences and the pilot data from the plurality of antennas at the same time. send and
A wireless communication method, wherein the transmitter switches between the parallel data and the pilot data and transmits synchronization signal data composed of serial information data having strong autocorrelation.

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