JP2015043550A - Radio communication system and antenna device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio communications system capable of increasing probability of re-connection even if a connection is disconnected due to change of peripheral propagation environment.SOLUTION: A radio communication system includes a transmitter, a receiver, and an antenna device connected to one or both of the transmitter and the receiver. The receiver includes an error detection part for detecting an error of a signal transmitted by the transmitter, and a reception result transmission part for transmitting a result of detection by the error detection part to the transmitter. The transmitter includes a signal transmission part for transmitting a signal, and a signal re-transmission part for re-transmitting a signal transmitted by the signal transmission part on the basis of a result transmitted from the reception result transmission part. The antenna device includes an antenna element for transmitting and receiving a signal, a rotation part for rotating the antenna element, and a rotation amount control part for controlling the amount of rotation of the rotation part on the basis of either of a preset parameter, a parameter transmitted by the transmitter, or a result detected by the error detection part.

Description

  The present invention relates to a wireless communication system and an antenna device.

  In wireless communication, fading in which the reception level fluctuates due to multiple wave propagation, and transmission quality is greatly degraded due to a drop in the reception level. As a technique for reducing deterioration in transmission quality due to a drop in reception level, a diversity technique using two or more paths with low correlation of reception level fluctuation is known. As one of the diversity configuration methods, there is polarization diversity using orthogonal polarized waves (see, for example, Non-Patent Document 1).

  FIG. 5 is a block diagram showing a device configuration of polarization diversity shown in Non-Patent Document 1. A signal transmitted from an antenna 41 provided in the transmission device 4 is received by an antenna element 51 and an antenna element 52 that are orthogonal to each other, and a diversity gain is obtained by selecting or combining each reception signal in the reception device 5. In general, in an environment where the transmitting antenna and the receiving antenna are out of line of sight, polarization exchange occurs due to reflection / diffraction that occurs during radio wave propagation of radio signals, and signal components are also generated in a polarization plane different from the polarization plane during transmission. . Therefore, at the time of reception, for example, the reception power and SNR (Signal-Noise Ratio) of the signals received by the antenna element 51 and the antenna element 52 are calculated, and the signal received by the antenna element having a high reception power or the antenna element having a high SNR is used. The diversity gain can be obtained by performing demodulation processing or performing demodulation processing by combining the signals received by the respective antenna elements with a maximum ratio.

"Antenna / Wireless Handbook", Naohisa Goto, Masao Nakagawa, Seihiko Ito, Ohmsha, October 25, 2006

  However, in the prior art, the signals received by two orthogonal antenna elements are selected or combined, so that when both received power drops due to fading, a sufficient diversity effect can be obtained. I can't. In addition, wireless communication terminals with little movement from the time of installation, such as wireless communication terminals attached to sensors and actuators, conduct radio wave surveys at the time of installation, and provide a place where signal power sufficient for communication can be obtained (reception area However, there is a possibility that the propagation environment may change due to movement of furniture and fixtures in the surrounding area and reception power may drop and the connection may be cut off. If a mobile terminal such as a mobile phone is disconnected once due to a change in the surrounding environment, the mobile terminal moves and the propagation environment changes again and can be reconnected. There is a problem that the propagation environment remains disconnected as long as the value does not change. In addition, unlike a mobile terminal, there is also a problem that a fixed terminal cannot obtain a time diversity effect due to interleaving / deinterleaving processing and an error correction code because no propagation fluctuation occurs during communication.

  The present invention has been made in view of such circumstances, and provides a wireless communication system and an antenna device that can increase the probability of reconnection even when the surrounding propagation environment changes and the connection is disconnected. For the purpose.

  The present invention is a radio communication system including a transmission device, a reception device, and an antenna device connected to one or both of the transmission device and the reception device, wherein the reception device is the transmission device An error detection unit that detects an error of the signal transmitted from the transmission unit, and a reception result transmission unit that transmits a result detected by the error detection unit to the transmission device, wherein the transmission device transmits a signal. And a signal retransmission unit that retransmits a signal transmitted by the signal transmission unit based on a result transmitted from the reception result transmission unit, and the antenna device includes an antenna element that transmits and receives signals, and Based on one of a rotating unit that rotates the antenna element, a preset parameter, a parameter transmitted from the transmitting device, and a result detected by the error detecting unit. Characterized by comprising a rotation amount control unit for controlling the amount of rotation of the parts.

  The present invention is a wireless communication system including a transmission device, a reception device, and an antenna device connected to one or both of the transmission device and the reception device, wherein the transmission device An error correction encoding unit that assigns an error correction code; and an interleaving unit that randomizes the order of the transmission bit sequence of the transmission signal encoded by the error correction encoding unit, and the reception device includes the interleaving unit A deinterleaving unit that returns the order of the bit string randomized by the unit to the original data sequence, and an error correction decoding unit that decodes the signal encoded by the error correction encoding unit to the original bit sequence, The antenna device includes an antenna element that transmits and receives signals, a rotating unit that rotates the antenna element, a preset parameter, and a parameter transmitted from the transmission device. Characterized by comprising a rotation amount control unit for controlling the rotation amount of the rotating unit based on chromatography data.

  The present invention is characterized in that the rotation amount control unit determines the rotation amount based on a frame length of a transmission signal.

  The present invention is characterized in that the rotation amount control unit rotates the antenna element by rotating the rotation unit only when an error is detected by the error detection unit.

  The present invention is a radio communication system including a transmission device, a reception device, and an antenna device connected to one or both of the transmission device and the reception device, wherein the reception device is the transmission device An error detection unit that detects an error of the signal transmitted from the transmission unit, and a reception result transmission unit that transmits a result detected by the error detection unit to the transmission device, wherein the transmission device transmits a signal. And a signal retransmission unit that retransmits a signal transmitted by the signal transmission unit based on a result transmitted from the reception result transmission unit, wherein the antenna device transmits and receives a vertical polarization component. An antenna element, a horizontal polarization antenna element that transmits and receives horizontal polarization components, a signal transmitted or received by the vertical polarization antenna element, and a signal transmitted or received by the horizontal polarization antenna element A variable phase shifter that changes a phase difference component; an amplitude control unit that changes an amplitude component of a signal transmitted or received by the vertical polarization antenna element; and a signal transmitted or received by the horizontal polarization antenna element; and the amplitude A signal combiner / distributor that combines or distributes the signal whose amplitude has been changed by the control unit and whose phase has been changed by the phase shifter and the other signal, a preset parameter, and a parameter transmitted from the transmitter A phase amount control unit that controls an amplitude change amount of the amplitude control unit and a phase amount of the variable phase shifter based on any of the results detected by the error detection unit.

  The present invention is a wireless communication system including a transmission device, a reception device, and an antenna device connected to one or both of the transmission device and the reception device, wherein the transmission device An error correction encoding unit that assigns an error correction code; and an interleaving unit that randomizes the order of the transmission bit sequence of the transmission signal encoded by the error correction encoding unit, and the reception device includes the interleaving unit A deinterleaving unit that returns the order of the bit string randomized by the unit to the original data sequence, and an error correction decoding unit that decodes the signal encoded by the error correction encoding unit to the original bit sequence, The antenna apparatus transmits a vertical polarization antenna element that transmits and receives a vertical polarization component, a horizontal polarization antenna element that transmits and receives a horizontal polarization component, and the vertical polarization antenna element. Alternatively, a variable phase shifter that changes a phase difference component between a received signal and a signal transmitted or received by the horizontal polarization antenna element, a signal transmitted or received by the vertical polarization antenna element, and the horizontal polarization antenna element An amplitude control unit that changes the amplitude component of the signal transmitted or received at, and a signal that combines or distributes the signal that has been changed in amplitude by the amplitude control unit and phase-changed by the phase shifter and the other signal A combiner / distributor, and a phase amount control unit that controls an amplitude change amount of the amplitude control unit and a phase amount of the variable phase shifter based on any of a preset parameter and a parameter transmitted from the transmission device. It is characterized by having.

  The present invention is characterized in that the phase amount control unit determines the phase amount based on a frame length of a transmission signal.

  The present invention is characterized in that the phase amount control unit controls the phase amount only when an error is detected by the error detection unit.

  The present invention is connected to a receiving device including an error detecting unit that detects an error of a signal transmitted from the transmitting device, and a reception result transmitting unit that transmits a result detected by the error detecting unit to the transmitting device. An antenna device that transmits and receives signals, a rotating unit that rotates the antenna element, a preset parameter, a parameter transmitted from the transmission device, and a result detected by the error detection unit And a rotation amount control unit for controlling the rotation amount of the rotation unit based on the above.

  The present invention includes a deinterleaving unit that returns the order of bit sequences randomized by a transmission device to the original data sequence, and an error correction decoding unit that decodes the signal encoded by the transmission device to the original bit sequence. An antenna device connected to a receiving device, wherein the antenna element transmits and receives signals, a rotating unit that rotates the antenna element, a preset parameter, and the rotation based on a parameter transmitted from the transmitting device And a rotation amount control unit for controlling the rotation amount of the unit.

  The present invention is connected to a receiving device including an error detecting unit that detects an error of a signal transmitted from the transmitting device, and a reception result transmitting unit that transmits a result detected by the error detecting unit to the transmitting device. An antenna device, a vertical polarization antenna element that transmits and receives a vertical polarization component, a horizontal polarization antenna element that transmits and receives a horizontal polarization component, a signal transmitted or received by the vertical polarization antenna element, and the horizontal polarization A variable phase shifter for changing a phase difference component of a signal transmitted or received by a wave antenna element, an amplitude component of a signal transmitted or received by the vertical polarization antenna element and a signal transmitted or received by the horizontal polarization antenna element An amplitude control unit that changes the signal, and a signal synthesis distribution that synthesizes or distributes the signal that has undergone amplitude change by the amplitude control unit and a phase change by the phase shifter and the other signal. And the amplitude change amount of the amplitude control unit and the phase amount of the variable phase shifter are controlled based on any of a preset parameter, a parameter transmitted from the transmission device, and a result detected by the error detection unit. And a phase amount control unit.

  The present invention includes a deinterleaving unit that restores the order of a bit string randomized by a transmission apparatus to an original data string, and an error correction decoding unit that decodes a signal encoded by the transmission apparatus into the original bit string. An antenna apparatus connected to the apparatus, wherein a vertical polarization antenna element that transmits and receives a vertical polarization component, a horizontal polarization antenna element that transmits and receives a horizontal polarization component, and transmission or reception by the vertical polarization antenna element A variable phase shifter that changes a phase difference component between a signal and a signal transmitted or received by the horizontal polarization antenna element; a signal transmitted or received by the vertical polarization antenna element; and a transmission or reception by the horizontal polarization antenna element An amplitude control unit that changes the amplitude component of the received signal, an amplitude change by the amplitude control unit, and a phase change by the phase shifter and the other signal The amplitude change amount of the amplitude control unit and the phase amount of the variable phase shifter are controlled based on either a signal synthesis / distribution unit that synthesizes or distributes the signal, a preset parameter, or a parameter transmitted from the transmission device And a phase amount control unit.

  According to the present invention, even when the surrounding propagation environment changes and the connection is disconnected, the propagation environment can be changed by rotating the polarization plane of the antenna, and the probability of reconnection can be increased. The effect of becoming is obtained.

It is a block diagram which shows the structure of 1st Embodiment of this invention. It is a block diagram which shows the structure of 2nd Embodiment of this invention. It is a block diagram which shows the structure of 3rd Embodiment of this invention. It is a block diagram which shows the structure of 4th Embodiment of this invention. It is a figure which shows the structure of the radio | wireless communications system by a prior art.

<First Embodiment>
Hereinafter, a wireless communication system according to a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of the embodiment. In this figure, reference numeral 1 denotes a transmission device. The transmission device 1 includes an antenna 11, a signal transmission unit 12, and a signal retransmission unit 13. Reference numeral 20 denotes an antenna device, which is connected to the receiving device 2. The antenna device 20 includes an antenna element 21, a rotating unit 22 including a motor, a rotary joint 23, and a rotation amount control unit 24. The receiving device 2 includes an error detection unit 25 and a reception result transmission unit 26.

  Next, the operation of the wireless communication system shown in FIG. 1 will be described. The signal transmitted from the transmission device 1 is received by the antenna element 21 that is rotating infinitely by the rotating unit 22. The antenna element 21 is fixed to the rotation axis in a state orthogonal to the rotation axis of the rotation unit 22. In FIG. 1, the center portion of the antenna element 21 and the rotating shaft of the rotating portion 22 are illustrated as being fixed. However, the center portion does not necessarily need to be the center portion, and the axis of the antenna element 21 and the rotating shaft are orthogonal to each other. If so, the end portion and the rotation shaft may be fixed to the antenna element 21. The received signal is connected to the receiving device 2 through a rotary joint 23 that can transmit signals while the antenna element 21 rotates. The rotary joint 23 can be replaced with slipping or a goniometer.

  The receiving device 2 determines whether the signal received by the error detection unit 25 has been correctly received. As a method of determination, for example, a technique in which an error detection code such as a parity code or a cyclic redundancy code is added to transmission data and error detection is performed on the receiving side based on each error detection algorithm can be applied. The reception result transmission unit 26 transmits the error detection result to the transmission device 1 via the antenna device 20. Examples of transmission of the reception result include ACK (ACKnowledgement) processing and NACK (Negative ACKnowledgement) processing.

  The transmission apparatus 1 determines whether to retransmit the signal based on the reception result notified from the reception apparatus 2. Specifically, for example, when there is a NACK response from the receiving device 2, a signal is transmitted, and when there is an ACK response, retransmission is not performed. In addition, if an ACK response does not return within a predetermined time after transmitting a signal, the signal may be retransmitted.

  The amount of rotation of the antenna device 21 by the rotation unit 22 is controlled by the rotation amount control unit 24. In addition to setting the number of rotations as a parameter in advance, the reception result is notified from the reception result transmission unit 26, and the signal is not correctly received. The antenna element 21 is rotated simultaneously with the retransmission.

  According to this configuration, since the antenna element 21 is continuously rotated by the rotating unit 22, the plane of polarization of the receiving antenna is different between the initial transmission and the retransmission. As a result, diversity gain due to retransmission can be expected especially in fixed installation terminals due to different propagation environments. In addition, the polarization diversity antenna can select or synthesize only two orthogonal polarization components, but the configuration shown in FIG. 1 can select or synthesize any polarization plane, thereby obtaining a diversity gain higher than polarization diversity. It is done.

  In the present embodiment, the antenna element 21 rotated by the rotating unit 22 has been described as the receiving side. However, the rotating antenna element is the transmitting device 1 on the transmitting side, or both the transmitting device 1 and the receiving device 2. The same effect can be obtained even with a configuration connected to the.

Second Embodiment
Next, a radio communication system according to the second embodiment of the present invention will be described. FIG. 2 is a block diagram showing the configuration of the embodiment. In this figure, the same parts as those in the wireless communication system shown in FIG. The wireless communication system shown in this figure is different from the wireless communication system shown in FIG. 1 in that the configurations of the transmission device 1 and the reception device 2 are different. The transmission apparatus 1 includes an error correction encoding unit 14 and an interleaving unit 15. The receiving device 2 includes a deinterleaving unit 27 and an error correction decoding unit 28.

  Next, the operation of the wireless communication system shown in FIG. 2 will be described. The signal transmitted from the transmission device 1 is received by the antenna element 21 that is rotating infinitely by the rotating unit 22. The received signal is connected to the receiving device 2 through a rotary joint 23 capable of transmitting a signal while rotating the antenna element 21.

  The error correction encoding unit 14 in the transmission apparatus 1 performs error correction encoding processing on the transmission data. The error correction code may be any code that can correct a bit that has caused a transmission error at the time of decoding on the receiving side. For example, a turbo code, a Reed-Solomon code, or a convolutional code can be applied. A signal subjected to error correction coding processing by the error correction coding unit 14 is rearranged at random by the interleaving unit 15. The reordering process in the interleaving unit 15 may be anything as long as it can be reversely operated (deinterleaved) on the receiving side and rearranged in the original order. Sorting and output can be applied sequentially from the column direction.

  The signal that has been subjected to error correction coding and interleaving processing by the transmitter 1 is transmitted as a radio signal and received by the receiver 2. The received signal is rearranged in the original order by performing a process reverse to the rearrangement process performed in the interleaving unit 15 in the deinterleaving unit 27. For example, when an interleaving unit 15 uses a matrix of m rows and n columns and inputs in the row direction and outputs in the column direction, the data series received by the deinterleaving unit 27 is rearranged in the column direction, and the output is in the row direction. Can be rearranged in the original order.

  The signal in which the data sequence is rearranged in the original order by the deinterleaving unit 27 is subjected to error correction processing by the error correction decoding unit 28. The error correction may be any method suitable for decoding the error correction code performed by the error correction encoding unit 14. For example, when a convolutional code is used as an error correction code, there is a Viterbi decoding algorithm.

  The rotation amount (rotation number) of the antenna element 21 by the rotation unit 22 is controlled by the rotation amount control unit 24 based on an instruction from the reception device 2, and in addition to setting the rotation number as a parameter in advance, The rotation speed is determined based on the control information contained in the transmission signal. For example, it is possible to change the rotation speed based on the frame length of the transmission signal or to change the rotation speed in accordance with the interleaving cycle.

  According to this configuration, since the antenna element 21 is continuously rotated by the rotating unit 22, even if it is a fixed terminal, the propagation environment changes in time during communication, so that interleaving and error correction codes are used. It is possible to improve the packet error rate under a low CNR environment and obtain a time diversity effect.

  In the present embodiment, the antenna element 21 rotated by the rotating unit 22 has been described as the receiving side. However, the rotating antenna element is the transmitting device 1 on the transmitting side, or both the transmitting device 1 and the receiving device 2. The same effect can be obtained even with a configuration connected to the.

<Third Embodiment>
Next, a radio communication system according to a third embodiment of the present invention is described. FIG. 3 is a block diagram showing the configuration of the embodiment. In this figure, the same parts as those in the wireless communication system shown in FIG. The wireless communication system shown in this figure is different from the wireless communication system shown in FIG. 1 in that the configuration of the antenna device 20 is different. The antenna device 20 shown in FIG. 3 includes a vertically polarized antenna element 29, a horizontally polarized antenna element 30, a variable phase shifter 31, an amplitude controller 32, an amplitude phase amount control unit 33, and a signal synthesis / distributor 34.

  Next, the operation of the wireless communication system shown in FIG. 3 will be described. The signal transmitted from the transmission device 1 is received by the vertical polarization antenna element 29 and the horizontal polarization antenna element 30, respectively. The signal received by the horizontally polarized antenna element 30 is changed to an arbitrary amplitude amount by the amplitude controller 32 and an arbitrary phase amount by the variable phase shifter 31. Here, the amplitude amount by the amplitude controller 32 and the phase amount by the variable phase shifter 31 are controlled by the amplitude phase amount controller 33. In addition to setting the amplitude amount and the phase amount as parameters in advance, the reception result is notified from the reception result transmitting unit 26, and when the signal is not correctly received, the polarization directivity is rotated simultaneously with the retransmission. The horizontally polarized signal whose phase has been changed is combined with the vertically polarized signal received by the vertically polarized antenna element 29 by the signal combiner / distributor 34.

  In the present embodiment, the amplitude amount is changed by the amplitude controller 32 and the phase amount is changed by the variable phase shifter 31 is the horizontal polarization signal. However, the amplitude amount of the vertical polarization signal is changed to the amplitude controller. The phase amount may be changed by a variable phase shifter. A signal synthesized by adding a phase difference between the vertical polarization signal and the horizontal polarization signal by the variable phase shifter becomes a signal whose polarization directivity rotates with time.

  The receiving device 2 determines whether the signal received by the error detection unit 25 has been correctly received. As a method of determination, for example, a technique in which an error detection code such as a parity code or a cyclic redundancy code is added to transmission data and error detection is performed on the receiving side based on each error detection algorithm can be applied. The reception result transmission unit 26 transmits the error detection result to the transmission device 1. As transmission of the reception result, for example, ACK (ACKnowledgement) processing and NACK (Negative ACKnowledgement) processing can be applied. The transmission apparatus 1 determines whether to retransmit the signal based on the reception result notified from the reception apparatus 2. Specifically, for example, when there is a NACK response from the receiving device, a signal is transmitted, and when there is an ACK response, retransmission is not performed. In addition, if an ACK response does not return within a predetermined time after transmitting a signal, the signal may be retransmitted.

  According to this configuration, since the polarization directivity changes with time, the polarization plane of the receiving antenna differs between the initial transmission and the retransmission. As a result, diversity gain due to retransmission can be expected especially in a fixed installation terminal due to different propagation environments. In contrast, the polarization diversity antenna can select or combine only two orthogonal polarization components, but in the present embodiment, any polarization plane can be selected or combined so that a diversity gain higher than polarization diversity can be obtained.

  In this embodiment, the antenna element that changes the polarization directivity has been described as the reception side. However, the antenna element that changes the polarization directivity is the transmission apparatus 1 on the transmission side, or both the transmission apparatus 1 and the reception apparatus 2. The same effect can be obtained even with a configuration connected to the.

<Fourth embodiment>
Next, a radio communication system according to a fourth embodiment of the present invention is described. FIG. 4 is a block diagram showing the configuration of the embodiment. In this figure, the same parts as those in the wireless communication system shown in FIG. The wireless communication system shown in this figure is different from the wireless communication system shown in FIG. 1 in that the configurations of the transmission device 1 and the reception device 2 are different. The transmission apparatus 1 includes an error correction encoding unit 14 and an interleaving unit 15. The receiving device 2 includes a deinterleaving unit 27 and an error correction decoding unit 28.

  Next, the operation of the wireless communication system shown in FIG. 4 will be described. The signal transmitted from the transmission device 1 is received by the vertical polarization antenna element 29 and the horizontal polarization antenna element 30, respectively. The signal received by the horizontally polarized antenna element 30 changes an arbitrary amplitude amount by the amplitude controller and an arbitrary phase amount by the variable phase shifter. Here, the amplitude amount by the amplitude controller 32 and the phase amount by the variable phase shifter 31 are controlled by the phase amount controller 33. In addition to setting the amplitude amount and the phase amount as parameters in advance, the phase amount is determined based on the control information contained in the transmission signal from the transmission apparatus 1. For example, it is possible to change the phase amount based on the frame length of the transmission signal, or to change the phase amount in accordance with the interleaving cycle. The horizontally polarized signal whose phase has been changed is combined with the vertically polarized signal received by the vertically polarized antenna element 29 by the signal combiner / distributor 34.

  In the present embodiment, the amplitude amount is changed by the amplitude controller 32 and the phase amount is changed by the variable phase shifter 31 is the horizontal polarization signal. However, the amplitude amount of the vertical polarization signal is changed to the amplitude controller. The phase amount may be changed by a variable phase shifter. The polarization directivity of the signal synthesized by adding a phase difference between the vertical polarization signal and the horizontal polarization signal by the variable phase shifter changes with time.

  The error correction encoding unit 14 in the transmission apparatus 1 performs error correction encoding processing on the transmission data. The error correction code only needs to be a code that can correct a bit that has caused a transmission error at the time of decoding on the receiving side. For example, a turbo code, a Reed-Solomon code, or a convolutional code can be applied. The signal that has been subjected to the error correction coding process by the error correction coding unit 14 is rearranged at random by the interleaving unit 15. The reordering process in the interleaving unit 15 may be anything as long as it can be reversely operated (deinterleaved) on the receiving side and rearranged in the original order. Sorting and output can be applied sequentially from the column direction.

  The signal that has been subjected to error correction coding and interleaving processing by the transmitter 1 is transmitted as a radio signal and received by the receiver 2. The received signals are rearranged in the original order by performing a process reverse to the rearrangement process performed in the interleaving unit 14 in the deinterleaving unit 27. For example, when an m-row n-column matrix is used for interleaving and input in the row direction and output in the column direction, the data series received by the deinterleaver is rearranged in the column direction, and output is performed from the row direction. Can be rearranged in the original order.

  The signal in which the data sequence is rearranged in the original order by the deinterleaving unit 27 is subjected to error correction processing by the error correction decoding unit 28. The error correction may be any method suitable for decoding the error correction code performed by the error correction encoding unit 14. For example, when a convolutional code is used as an error correction code, there is a Viterbi decoding algorithm.

  According to this configuration, even in the case of a fixed installation terminal, it is possible to generate a situation similar to a Doppler shift because the way in which received signals are synthesized changes with time due to changes in polarization directivity during communication. Thus, the packet error rate under a low CNR environment can be improved by the interleaving process and the error correction code, and the time diversity effect can be obtained.

  In this embodiment, the antenna element that changes the polarization directivity has been described as the reception side. However, the antenna element that changes the polarization directivity is the transmission apparatus 1 on the transmission side, or both the transmission apparatus 1 and the reception apparatus 2. The same effect can be obtained even with a configuration connected to the.

  As described above, in the wireless communication system, the polarization diversity and the time diversity are applied by continuously rotating the polarization plane of the transmission antenna or the reception antenna mechanically or electrically. As a result, even when the surrounding propagation environment changes and the connection is disconnected in a fixedly installed wireless communication device, the propagation environment can be changed by rotating the polarization plane of the antenna, and the probability of reconnection is reduced. It becomes possible to raise.

  In addition, when the antenna element continuously rotates, the plane of polarization at the time of transmission or reception can be changed at every transmission or reception timing. Therefore, it is possible to select more polarization planes than polarization diversity using two orthogonal polarization planes, and a diversity effect can be obtained compared to polarization diversity.

  In addition, in a terminal that is fixedly installed, even if the surrounding propagation environment fluctuates due to movement of furniture, fixtures, etc., even if the received power drops and the connection is disconnected, the propagation environment can be changed again by rotating the antenna element. It is possible to reconnect by performing retransmission.

  Further, even in the case of a fixed installation terminal, the antenna element rotates and moves during communication, thereby causing a propagation variation and obtaining the same time diversity effect as that of the mobile terminal.

  Further, arbitrary polarization directivity can be formed by weighted phase synthesis of a vertically polarized signal transmitted or received by a vertically polarized antenna and a horizontally polarized signal transmitted or received by a horizontally polarized antenna. Therefore, it is possible to select more polarization planes than polarization diversity using two orthogonal polarization planes, and a diversity effect can be obtained compared to polarization diversity.

  In addition, in a fixedly installed terminal, even when furniture or fixtures move, the surrounding propagation environment fluctuates, the received power drops, and the connection is cut off. In some cases, the polarization plane can be changed from that before disconnection, and the multipath environment is changed again and reconnection is possible by performing retransmission.

  In addition, even in a fixed installation terminal, by changing the polarization directivity during communication, the way in which received signals are synthesized changes over time, resulting in propagation fluctuations, and the same time diversity effect as a mobile terminal can be obtained. It becomes possible.

  As mentioned above, although embodiment of this invention has been described with reference to drawings, the said embodiment is only the illustration of this invention, and it is clear that this invention is not limited to the said embodiment. is there. Therefore, additions, omissions, substitutions, and other modifications of the components may be made without departing from the technical idea and scope of the present invention.

  Even when the surrounding propagation environment changes and the connection is disconnected, it can be applied to an application in which it is essential to increase the probability of reconnection.

  DESCRIPTION OF SYMBOLS 1 ... Transmission apparatus, 11 ... Antenna, 12 ... Signal transmission part, 13 ... Signal resending part, 14 ... Error correction encoding part, 15 ... Interleaving part, 2 ... Receiving device, 20 ... antenna device, 21 ... antenna element, 22 ... rotation unit, 23 ... rotary joint, 24 ... rotation amount control unit, 25 ... error transfer unit, 26. ..Receiving result transmission unit, 27... Deinterleaving unit, 28... Error correction decoding unit, 29... Vertical polarization antenna element, 30. , 33... Phase amount control unit, 34... Signal synthesis distributor

Claims (12)

A wireless communication system comprising a transmission device, a reception device, and an antenna device connected to one or both of the transmission device and the reception device,
The receiving device is:
An error detection unit for detecting an error of a signal transmitted from the transmission device;
A reception result transmission unit that transmits a result detected by the error detection unit to the transmission device;
The transmitter is
A signal transmission unit for transmitting a signal;
A signal retransmission unit that retransmits a signal transmitted by the signal transmission unit based on a result transmitted from the reception result transmission unit;
The antenna device is
An antenna element for transmitting and receiving signals;
A rotating part for rotating the antenna element;
A rotation amount control unit that controls a rotation amount of the rotation unit based on any one of a preset parameter, a parameter transmitted from the transmission device, and a result detected by the error detection unit. Wireless communication system. A wireless communication system comprising a transmission device, a reception device, and an antenna device connected to one or both of the transmission device and the reception device,
The transmitter is
An error correction encoding unit for adding an error correction code to the transmission signal;
An interleaving unit for randomizing the order of the transmission bit string of the transmission signal encoded by the error correction encoding unit,
The receiving device is:
A deinterleaving unit that returns the order of the bit sequence randomized by the interleaving unit to the original data sequence;
An error correction decoding unit that decodes the signal encoded by the error correction encoding unit into an original bit string;
The antenna device is
An antenna element for transmitting and receiving signals;
A rotating part for rotating the antenna element;
A wireless communication system, comprising: a rotation amount control unit that controls a rotation amount of the rotation unit based on a preset parameter and a parameter transmitted from the transmission device.   The wireless communication system according to claim 1 or 2, wherein the rotation amount control unit determines the rotation amount based on a frame length of a transmission signal.   The wireless communication system according to claim 1, wherein the rotation amount control unit rotates the antenna element by rotating the rotation unit only when an error is detected by the error detection unit. A wireless communication system comprising a transmission device, a reception device, and an antenna device connected to one or both of the transmission device and the reception device,
The receiving device is:
An error detection unit for detecting an error of a signal transmitted from the transmission device;
A reception result transmission unit that transmits a result detected by the error detection unit to the transmission device;
The transmitter is
A signal transmission unit for transmitting a signal;
A signal retransmission unit that retransmits a signal transmitted by the signal transmission unit based on a result transmitted from the reception result transmission unit;
The antenna device is
A vertically polarized antenna element that transmits and receives vertically polarized components;
A horizontally polarized antenna element that transmits and receives horizontally polarized components;
A variable phase shifter that changes a phase difference component between a signal transmitted or received by the vertically polarized antenna element and a signal transmitted or received by the horizontally polarized antenna element;
An amplitude control unit that changes an amplitude component of a signal transmitted or received by the vertically polarized antenna element and a signal transmitted or received by the horizontally polarized antenna element;
A signal synthesis / distribution unit that synthesizes or distributes the other signal and the signal whose amplitude or phase has been changed by the phase shifter or the amplitude control unit;
Amplitude phase amount for controlling the amplitude component of the amplitude control unit and the phase amount of the variable phase shifter based on any of a preset parameter, a parameter transmitted from the transmission device, and a result detected by the error detection unit A wireless communication system comprising a control unit. A wireless communication system comprising a transmission device, a reception device, and an antenna device connected to one or both of the transmission device and the reception device,
The transmitter is
An error correction encoding unit for adding an error correction code to the transmission signal;
An interleaving unit for randomizing the order of the transmission bit string of the transmission signal encoded by the error correction encoding unit,
The receiving device is:
A deinterleaving unit that returns the order of the bit sequence randomized by the interleaving unit to the original data sequence;
An error correction decoding unit that decodes the signal encoded by the error correction encoding unit into an original bit string;
The antenna device is
A vertically polarized antenna element that transmits and receives vertically polarized components;
A horizontally polarized antenna element that transmits and receives horizontally polarized components;
A variable phase shifter that changes a phase difference component between a signal transmitted or received by the vertically polarized antenna element and a signal transmitted or received by the horizontally polarized antenna element;
An amplitude control unit that changes an amplitude component of a signal transmitted or received by the vertically polarized antenna element and a signal transmitted or received by the horizontally polarized antenna element;
A signal synthesis / distribution unit that synthesizes or distributes the other signal and the signal whose amplitude or phase has been changed by the phase shifter or the amplitude control unit;
An amplitude phase amount control unit that controls an amplitude component of the amplitude control unit and a phase amount of the variable phase shifter based on either a preset parameter or a parameter transmitted from the transmission device. A wireless communication system.   The wireless communication system according to claim 5 or 6, wherein the amplitude phase amount control unit determines the amplitude amount or the phase amount based on a frame length of a transmission signal.   6. The radio communication system according to claim 5, wherein the amplitude phase amount control unit controls the amplitude amount or the phase amount only when an error is detected by the error detection unit. An antenna device connected to a receiving device including an error detecting unit that detects an error of a signal transmitted from a transmitting device, and a reception result transmitting unit that transmits a result detected by the error detecting unit to the transmitting device. And
An antenna element for transmitting and receiving signals;
A rotating part for rotating the antenna element;
A rotation amount control unit that controls a rotation amount of the rotation unit based on any one of a preset parameter, a parameter transmitted from the transmission device, and a result detected by the error detection unit. Antenna device to do. Connected to a receiving device comprising: a deinterleaving unit that returns the order of the bit sequence randomized by the transmitting device to the original data sequence; and an error correction decoding unit that decodes the signal encoded by the transmitting device to the original bit sequence An antenna device,
An antenna element for transmitting and receiving signals;
A rotating part for rotating the antenna element;
An antenna device comprising: a rotation amount control unit that controls a rotation amount of the rotation unit based on a preset parameter and a parameter transmitted from the transmission device. An antenna device connected to a receiving device including an error detecting unit that detects an error of a signal transmitted from a transmitting device, and a reception result transmitting unit that transmits a result detected by the error detecting unit to the transmitting device. And
A vertically polarized antenna element that transmits and receives vertically polarized components;
A horizontally polarized antenna element that transmits and receives horizontally polarized components;
A variable phase shifter that changes a phase difference component between a signal transmitted or received by the vertically polarized antenna element and a signal transmitted or received by the horizontally polarized antenna element;
An amplitude control unit that changes an amplitude component of a signal transmitted or received by the vertically polarized antenna element and a signal transmitted or received by the horizontally polarized antenna element;
A signal synthesis / distribution unit that synthesizes or distributes the other signal and the signal whose amplitude or phase has been changed by the phase shifter or the amplitude control unit;
Amplitude phase amount for controlling the amplitude component of the amplitude control unit and the phase amount of the variable phase shifter based on any of a preset parameter, a parameter transmitted from the transmission device, and a result detected by the error detection unit An antenna device comprising: a control unit. A deinterleaving unit that returns the order of the bit sequence randomized by the transmission device to the original data sequence, and an error correction decoding unit that decodes the signal encoded by the transmission device to the original bit sequence is connected to the reception device. An antenna device,
A vertically polarized antenna element that transmits and receives vertically polarized components;
A horizontally polarized antenna element that transmits and receives horizontally polarized components;
A variable phase shifter that changes a phase difference component between a signal transmitted or received by the vertically polarized antenna element and a signal transmitted or received by the horizontally polarized antenna element;
An amplitude control unit that changes an amplitude component of a signal transmitted or received by the vertically polarized antenna element and a signal transmitted or received by the horizontally polarized antenna element;
A signal synthesis / distribution unit that synthesizes or distributes the other signal and the signal whose amplitude or phase has been changed by the phase shifter or the amplitude control unit;
An amplitude phase amount control unit that controls an amplitude component of the amplitude control unit and a phase amount of the variable phase shifter based on either a preset parameter or a parameter transmitted from the transmission device. An antenna device.

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