JP5366191B2 - Radio device and antenna switching method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce in size a wireless apparatus to be used for a flying object, to save power and to improve efficiency. <P>SOLUTION: The flying object, that includes the wireless apparatus for selecting a plurality of antennas to perform communication, includes: the wireless apparatus for generating and receiving a communication wave; an upper antenna electrically connected to the wireless apparatus and installed higher than a wing surface; a lower antenna electrically connected to the wireless apparatus and installed lower than the wing surface; and a selector for alternatively selecting, in an electrical manner, electrical connection of the wireless apparatus with the upper antenna or the lower antenna. The wireless apparatus has a processing section for calculating a positional relationship between the apparatus itself and a communicating partner from positional information of the apparatus's own, attitude information and positional information of the communicating partner and identifying the antenna suitable for communication on the basis of a result of the calculation processing. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a radio device that is mounted on a flying body and performs wireless communication by automatically selecting a plurality of communication antennas, and an antenna switching method.

  In a flying object having a plurality of communication antennas, communication signals are simultaneously transmitted from the plurality of antennas. In addition, communication signals are received simultaneously from a plurality of antennas.

As related technologies, Patent Documents 1 to 3 are cited.
In Patent Document 1, it is possible to simulate the movement of a flying object using a data link device (wireless device) installed on a flying object, a data link device installed on another large flying object, and a simulation computer. A data link device (radio device) is disclosed. In addition, a technique for communicating position information of a flying object using a GPS receiver, a transponder, and an interrogator is also disclosed.

  In Patent Document 2, in a communication system used in a flying object equipped with a plurality of antennas, a plurality of spreading codes are used for encoding communication signals, and a communication wave to be transmitted is encoded with a plurality of spreading codes. A technique for transmitting from an antenna is described. Also disclosed is a technique for de-encoding a communication wave encoded with a plurality of received spread codes and obtaining the maximum gain of the received communication wave.

  In Patent Document 3, in a communication system used in a flying object equipped with a plurality of antennas, a plurality of spreading codes and a delay circuit are used for encoding a communication signal, a communication wave to be transmitted is divided into two, and one is delayed. In addition, a technique for encoding with a plurality of spreading codes and transmitting from an antenna is described. Also disclosed is a technique for de-encoding a communication wave encoded with a plurality of received spread codes, invalidating a delay, and obtaining a maximum gain of the received communication wave.

  In the techniques disclosed in Patent Documents 2 and 3, spatial diversity is achieved by using a plurality of antennas, diversity by encoding is performed by using a plurality of spreading codes, and diversity by time is achieved by using a delay circuit. , Aiming for multiple diversity.

  In this field, as in the technique disclosed in Patent Document 1, position information is effective for communication between a flying object and another flying object or between a flying object and a ground station in order to determine the direction in which the communication wave is transmitted. It is. In addition, as in the techniques disclosed in Patent Documents 2 to 3, a technique for preventing a communication wave transmitted from a flying object from being blocked or attenuated by the shadow of an airframe or the like is effective.

Japanese Patent Laid-Open No. 9-17897 JP 2006-166039 A JP 2006-279624 A

  However, although the technique disclosed in Patent Document 1 performs data link communication using position information and a directional antenna, there is a problem of being blocked or attenuated by the shadow of the aircraft or the like depending on the positional relationship between the flying object and the communication partner. There is. This is because an incommunicable state occurs depending on the antenna installation position and flight attitude (flight direction) of the flying object. In the data link, communication interruptions also lead to data loss, and processing such as link connection (recovery) is required, and an instantaneous communication impossible state is fatal. Further, in general, the flying object has a fixed antenna installation position, and its flight posture changes frequently.

Although the techniques disclosed in Patent Documents 2 and 3 are intended to be combined with diversity, there remains room for further improvement.
Specifically, in wireless communication, it is efficient to transmit a wireless communication wave with an antenna that is not easily attenuated. In addition, the wireless communication wave only needs to be communicated with the communication partner (direction of the communication destination), and it is inefficient to transmit the wireless communication wave in a direction where there is no communication partner. In addition, it is not desirable even considering communication security.

  Furthermore, for flying objects, power saving, equipment miniaturization, and weight reduction are important issues. Specifically, the existing flying object has a limited installation space, and can only be newly installed unless it is a wireless device of a predetermined size or less. Even when an existing facility is replaced with a wireless device having a good performance, it cannot be stored in a larger capacity than the existing facility.

The communication systems of Patent Documents 2 to 3 do not take into account the efficiency between the transmission source antenna and the reception destination antenna. Similarly, the transmission efficiency on the transmission side is not taken into consideration. The flying body transmits the same radio communication wave from the upper antenna and the lower antenna, and transmits the radio communication wave in an unnecessary direction where there is no communication partner, leaving room for improvement in both efficiency and security.
Furthermore, it is necessary to further pursue power saving in the flying object, downsizing of the equipment (smaller capacity), and weight reduction.

  An object of the present invention is to solve the above-mentioned problems, pursue an improvement point, adopt an antenna suitable for the position of a communication partner, and provide a wireless device mounted on a flying body that enables efficient wireless communication. There is.

The wireless device of the present invention is mounted on a flying object that independently stands in the atmosphere and processes communication signals (communication information) in a wireless device that performs communication by selecting a required antenna from a plurality of antennas. A signal processing unit that performs antenna selection processing, a transmitter that is connected to the signal processing unit and generates a communication wave, a receiver that is connected to the signal processing unit and receives a communication wave, and the transmitter or receiver And a selector that electrically switches the electrical connection between the transmitter or receiver and the plurality of antennas based on the antenna selection process of the signal processing unit. The antenna selection process performed by the unit refers to the position information, posture information, and position information of the opponent flying object that is a communication partner, which dynamically change with the flight of the flying object on which the wireless device is mounted. and before Sequentially deriving processing the positional relationship of the mating projectile to the communication partner, based on the result of the sequential performed derivation process, autonomous antenna suitable for communicating with the other projectile to the communication partner from the plurality of antennas It is characterized by selecting sequentially .

  ADVANTAGE OF THE INVENTION According to this invention, the radio | wireless machine mounted in the flying body which employ | adopts the antenna suitable for the position of the other party of communication, and enables efficient radio | wireless communication can be provided.

  A first embodiment of the present invention will be described with reference to FIGS.

Drawing 1 is an explanatory view showing flying object 1 of one embodiment.
The flying object 1 is provided with a data link radio 10, an upper antenna 20, a lower antenna 30, and a state detection device 40 (not shown).

  The data link radio 10 is a radio that generates and receives data link communication waves for communication with another flying object 2 (not shown) or a ground station 3 (not shown) flying around. It is. The data link radio 10 will be described in detail later.

The upper antenna 20 is an antenna that is installed on the outer shell of the flying object 1 and above the wing surface, and can transmit and receive data link communication waves.
The lower antenna 30 is an antenna that is installed in the outer shell of the flying object 1 and below the wing surface, and is capable of transmitting and receiving data link communication waves.

  The data link radio 10 is electrically connected to one or both of the upper antenna 20 and the lower antenna 30 using an antenna selection unit 210 (not shown) that is a built-in antenna switching device, and communicates data link communication waves. To send. In addition, the communication wave of the data link from another flying object 2 or the ground station 3 is received.

The state detection device 40 detects the posture (posture information) and position (position information) of the flying object 1. Here, the posture information is numerical information representing angle information represented by relative pitch, roll, yaw or the like.
For detection processing of posture information and position information, various sensor devices such as an AHRS (Attitude Heading Reference System) and a gyro which the flying object has, or a position acquired from a GPS or the like may be used. Information may be used.

FIG. 2 is a functional block diagram showing the data link radio 10.
The data link radio 10 includes a signal processing unit 100 that performs various signal generation, various signal processing, transmission antenna selection determination processing, and the like, a transmitter 200 that generates and transmits a radio communication wave to the antenna, and a radio communication wave received from the antenna. The receiver 300 is transmitted to the signal processing unit 100. Further, the transmitter 200 is provided with an antenna selection unit 210 that enables selection of electrical connection between the data link radio 10 and the upper antenna 20 and the lower antenna 30.

  The signal processing unit 100 includes a calculation unit, a storage unit, a control unit, and the like. The signal processing unit 100 receives communication information (communication signal) to be transmitted, performs multiplexing processing, signal modulation processing, encoding processing, and the like, and transmits various signals to the transmitter 200. In addition, the signal processing unit 100 acquires the attitude information and position information of the own aircraft (the flying object on which the wireless device is mounted) detected by the state detection device 40, the position information of the communication partner, and other information, and the communication partner And the position relationship between the device and the own device is calculated, an antenna suitable for communication with the communication partner is automatically selected from the upper antenna 20 and the lower antenna 30, and the selection result is generated as a selection signal. Similarly, the signal processing unit 100 performs processing such as signal demodulation processing from the receiver 300 and code decoding in a timely manner.

  The transmitter 200 and the receiver 300 are configured by a power amplification circuit, a high frequency conversion circuit, or the like. Further, the transmitter 200 and the receiver 300 include an accompanying power supply circuit, a cooling device, and the like.

  Based on the selection signal from the signal processing unit 100, the transmitter 200 operates the built-in antenna selection unit 210, amplifies the signal to be transmitted, and transmits it from a predetermined antenna.

  In general, the transmitter 200 shares the electric circuit and components of the transmission system provided for each of the upper antenna 20 and the lower antenna 30 system, and reduces the power amplification unit, the power supply circuit, the cooling device, and the like.

  The receiver 300 is composed of two systems of receiving units including a power amplifier circuit, a high frequency conversion circuit, and the like. The receiver 300 amplifies the signal received from the antenna and transmits it to the signal processing unit 100.

  With such a configuration, the flying object 1 according to the present embodiment enables selection between the upper antenna 20 and the lower antenna 30 using the position information of the communication partner, the position information of the own aircraft, and the information on the attitude. .

  In general, an antenna installed on a flying object has a region where communication is impossible or signal wave attenuation is significantly unsuitable for communication in a region behind the aircraft from the installation position.

  FIG. 3 is a diagram explicitly showing a region unsuitable for the communication of the flying object 1. As shown in FIG. 3, the upper antenna 20 is not suitable for communication below the aircraft, and the lower antenna 30 is not suitable for communication above the aircraft.

  The illustrated radio wave intermediate surface is a boundary surface at a position suitable for communication between the upper antenna 20 and the lower antenna 30, and is a surface that virtually defines a position in which both antennas can communicate and have equal communication sensitivity. . That is, it is desirable to use the upper antenna 20 above the radio wave intermediate surface and use the lower antenna 30 below the radio wave intermediate surface.

  Note that FIG. 3 is explicitly shown, and the region unsuitable for communication and the radio wave intermediate surface vary depending on the shape of the airframe, the wing shape, the material, and the like. In addition, a region unsuitable for communication of each antenna is roughly divided into an upper part and a lower part on the basis of the blade surface.

  Next, the operation of the data link radio 10 and the communication operation between the flying object 1 and the data link destination will be described, and the data link radio 10 will be described.

FIG. 4 is a flowchart showing a part of the transmission process of the data link radio 10.
The signal processing unit 100 of the data link radio 10 acquires the position information and attitude information of the own apparatus (step S401). In addition, what is necessary is just to use the information received from various measuring devices and the state detection apparatus 40, or the information received from GPS, a base station, etc. for the positional information and attitude | position information of an own machine.

  The signal processing unit 100 acquires position information of the communication partner (step S402). Note that the location information of the communication partner may be selected from the notification from the communication partner or location information held in advance. In addition, this step may be before or after step S401.

  Based on the various information acquired, the signal processing unit 100 calculates which of the upper antenna 20 and the lower antenna 30 is suitable for communication with the communication partner, and selects a suitable antenna (step S403). The calculation processing and selection processing performed by the signal processing unit 100 will be illustrated and described later.

  The signal processing unit 100 notifies the transmitter 200 of the antenna selection result (selection signal) and transmits communication information to be transmitted. Based on the antenna selection result (selection signal), the transmitter 200 operates the built-in antenna selection unit 210, amplifies the signal to be transmitted, and sends a communication wave to the selected antenna (step S404).

  The upper antenna 20 or the lower antenna 30 selected by the signal processing unit 100 transmits a communication wave into the atmosphere.

  Next, the communication operation between the flying object 1 and the flying object 2 or the ground station 3 which is the data link destination will be exemplified, and the operation of the data link wireless device 10 will be described.

FIG. 5 is a diagram visually showing data link communication between the flying object 1 and the flying object 2.
The flying object 1 always acquires its own position information and attitude information and notifies the data link radio 10 (corresponding to step S401 in FIG. 4).
The flying object 1 acquires the position information notified from the flying object 2 (corresponding to step S402 in FIG. 4). Any method for receiving the position information from the flying object 2 may be used. For example, if the data link has been completed, the data may be received from the flying object 2 by data link communication, or may be received by another communication method. Further, if the position information is estimated by maintaining a specific positional relationship with a radar or the like, the position information of the flying object 2 can be acquired without communication.
The data link radio 10 calculates an antenna suitable for communication with the flying object 2 based on the notified various information, and selects the upper antenna 20 (corresponding to step S403 in FIG. 4).
The data link radio 10 operates the antenna selection unit 210 of the transmitter 200 based on the antenna selection processing, performs processing such as modulation and coding of communication information, and transmits a communication wave to the upper antenna 20 ( Corresponding to step S404 in FIG. 4).
The flying object 1 transmits the communication wave generated by the data link radio 10 from the upper antenna 20.

FIG. 6 is a diagram visually showing data link communication between the flying object 1 and the ground station 3.
The flying object 1 always acquires the position information and attitude information of its own aircraft and notifies it to the data link radio 10, acquires the position information of the ground station 3 that is the communication partner, and notifies the data link radio 10 ( Corresponding to steps S401 and S402 in FIG. 4).
The data link radio 10 calculates an antenna suitable for communication with the ground station 3 based on the notified various information, and selects the lower antenna 30 (corresponding to step S403 in FIG. 4).
Based on the antenna selection processing, the data link radio 10 operates the antenna selection unit 210 of the transmitter 200, performs processing such as modulation and encoding of communication information, and transmits a communication wave to the lower antenna 30 ( Corresponding to step S404 in FIG. 4).
The flying object 1 transmits the communication wave generated by the data link radio 10 from the lower antenna 30.
In this way, the data link radio 10 can adopt an antenna suitable for the communication partner position and enable efficient radio communication.

  Next, calculation processing and selection processing performed by the signal processing unit 100 will be described. The calculation process and the selection process only need to be able to select an effective antenna based on various types of information. For example, there are two methods described later.

First, the relationship between the attitude (pitch, roll, yaw) and latitude, longitude, altitude, etc. of the flying object used for the explanation of the exemplified system will be explained.
FIG. 7 is a diagram for explaining the attitude definition used for explaining each method. In each method to be described later, as shown in FIG. 7, the relationship between the X axis, the Y axis, and the Z axis and the latitude, longitude, and altitude is defined. In addition, the relationship between the attitude of the flying object and the pitch, roll, and yaw is defined.
That is, the X axis represents the latitude direction, and the north side is positive (+). The Y axis represents the longitude direction, and the east side is positive (+). The Z axis represents the altitude direction, and the cosmic side is positive (+).
The pitch is clockwise when the flying object is viewed from the left side. The roll is normally rotated clockwise when the flying object is viewed from the front. Yo sees the flying object from above and turns it counterclockwise.
Note that the posture definition may change depending on the type of gyro, its attachment position, direction, and the like. In that case, the calculation formula described later also changes.

FIG. 8 is an explanatory diagram illustrating a surface method that is an example of a calculation process.
In the plane method, the signal processing unit 100 selects and processes an antenna suitable for communication based on a radio wave intermediate plane (see FIG. 3) between the upper antenna 20 and the lower antenna 30. The radio wave intermediate surface may be defined to be the same as the blade surface. For the sake of clarity, the plane will be described using a plane.
The selection process uses the specified radio wave intermediate plane and the position of the communication partner to calculate whether the communication partner is located above or below the radio wave intermediate plane, and based on the calculation process result, If there is, the upper antenna 20 is selected, and if it is lower, the lower antenna 30 is selected.
If the radio wave intermediate plane is defined as the same plane as the blade surface, the plane K and the point Q are determined based on the plane K defined along the blade surface and the position of the communication partner (point Q in space). And determine whether the calculated value is positive (+) or negative (−). If it is +, the upper antenna 20 is selected, and if it is-, the lower antenna 30 is selected.

The calculation procedure will be described below. The equation of the point Q (x, y, z) in the coordinate space and the plane when the coordinate origin O is the own machine is as follows.
F (x, y, z) = A * x + B * y + C * z + D...
F (x, y, z) = 0... Expression expressing plane K
here,
A, B, and C are normal vectors in the direction of the upper antenna standing perpendicular to the plane K.
The origin O indicates the coordinates of the own machine.
The acquired information is substituted into F (x, y, z), and the sign of the calculated value is identified.
F (x, y, z)> 0 ... The point Q exists in the upper antenna direction of the plane K (the communication partner exists in the upper direction of the aircraft), so the upper antenna 20 is selected.
F (x, y, z) <= 0... Point Q exists in the direction of the lower antenna on the plane K (the communication partner exists in the lower direction of the aircraft), so the lower antenna 30 is selected.
The calculation formula of F (x, y, z) is as follows.
F (x, y, z) = (-1) * (cos (Y) * sin (P) + sin (Y) * sin (U)) * x + ((-1) * sin (Y) * sin ( P) + cos (Y) * sin (U)) * y + (cos (P) + cos (U)) * z
Here, the following values are used for each value.
Y: Yaw angle of own aircraft (unit radians)
P: Own device pitch angle (unit radians)
U: Own roll angle (unit radians)
A: Value of normal vector x (-1) * (cos (Y) * sin (P) + sin (Y) * sin (U))
B: Value of normal vector y (-1) * sin (Y) * sin (P) + cos (Y) * sin (U)
C: Value of normal vector z cos (P) + cos (U)
D: Zero
x: Latitude difference (communication partner position-own machine) (unit: m)
y: Longitude difference (own device-communication partner position) (unit: m)
z: Altitude difference (communication partner position-own machine) (unit: m)
If calculation processing is performed in this manner, it is possible to identify whether the communication partner position is the defined plane K, that is, above or below the blade surface, and an antenna suitable for communication can be selected.

FIG. 9 is an explanatory diagram showing an inner product method which is an example of calculation processing.
In the inner product method, the signal processing unit 100 selects and processes an antenna suitable for communication based on the position information and posture information of the own device and the position information of the communication partner.
The selection process calculates the upper antenna vector A and the lower antenna vector B from the position information and attitude information of the own apparatus, calculates the communication partner vector C from the position information of the own apparatus and the position information of the communication partner, An inner product process is performed on the vector, and an antenna having a larger inner product value is selected based on the processing result.
The upper antenna vector A and the lower antenna vector B are unit vectors defined upward or downward from the antenna origin of the own device (the midpoint between the upper antenna 20 and the lower antenna 30). The communication partner vector C is a vector (direction is the communication partner) connecting two points of the antenna origin (position information of the own device) and the position information of the communication partner. If the communication distance is long, there is little influence even if the point represented by the position information of the own device is used as the antenna origin.

The following formula may be used as the calculation formula for the inner product processing.
UV (inner antenna inner product) = upper antenna vector A / communication partner vector C
DV (lower antenna inner product) = lower antenna vector B / communication partner vector C
UV> DV... Since the communication partner exists above the flying object, the upper antenna 20 is selected.
UV <= DV... Since the communication partner is present in the lower direction of the aircraft, the lower antenna 30 is selected.

各ベクトルをX軸の＋方向から見て、反時計回りにピッチ角分(下式でP)回転させる。

各ベクトルをZ軸の＋方向から見て、反時計回りにヨウ角分(下式でT)回転させる。

Next, the calculation procedure of the upper antenna vector A and the lower antenna vector B will be described. First, the initial value of the upper antenna vector A and the initial value of the lower antenna vector B are defined using the antenna origin as coordinates (0, 0, 0). Next, based on the attitude information of the flying object, the defined upper antenna vector A and lower antenna vector B are rotated to relative positions indicating the current attitude using the respective axes (X, Y, Z).
The calculation formula is as follows.
As an initial value, when pitch, roll, and yaw are all zero,
Upper antenna vector (unit vector) A = (x1, y1, z1)
Lower antenna vector (unit vector) B = (-x1, -y1, -z1)
Is specified. However, x1, y1, and z1 are real numbers, and the following equation is established.
x1 * x1 + y1 * y1 + z1 * z1 = 1
The upper antenna vector A and the lower antenna vector B (hereinafter referred to as each vector) are rotated clockwise by the roll angle (U in the following equation) as viewed from the + direction of the Y axis.

Each vector is rotated counterclockwise by the pitch angle (P in the following equation) when viewed from the + direction of the X axis.

Each vector is rotated counterclockwise by the yaw angle (T in the following equation) when viewed from the + direction of the Z axis.

With this calculation process, the inner product is calculated using the position information, attitude information, and communication partner position of the aircraft, and the communication partner is in the upper antenna direction or the lower antenna direction based on the antenna origin based on the calculation result. Can be identified, and an antenna suitable for communication can be selected.
In other words, the data link radio 10 can adopt an antenna suitable for the position of the communication partner and enable efficient radio communication.
In addition, it is possible to transmit a radio communication wave with an antenna that is not easily attenuated by the radio communication wave, thereby reducing data loss and transmission power.
Furthermore, it becomes possible to communicate the radio communication wave with the communication partner (direction of the communication destination), and it is possible to prevent the radio communication wave from being transmitted in the direction where the communication partner is not present, so that power saving and security can be improved.
In addition, the electric circuit and components provided for each transmission system of the transmitter 200 can be shared, and the volume of the wireless device can be reduced. Furthermore, the power supply circuit for the circuit network such as the power amplifying unit can be reduced, and the power can be saved. Further, by reducing the power supply circuit, the number of cooling devices can be reduced, and downsizing, power saving, and weight reduction can be achieved.
Miniaturization and weight reduction of a transmission system are particularly important for a radio device used in a flying object or the like.

  Next, a second embodiment of the present invention will be described with reference to FIGS. In the second embodiment, unlike the data link radio 10 of the first embodiment, an antenna switching device is installed in the receiver. In addition, the same code | symbol is provided to the same part as 1st Embodiment, and description is abbreviate | omitted.

FIG. 10 is a functional block diagram illustrating the data link radio 10b according to the second embodiment.
The data link radio 10b is selected by a signal processing unit 100b that performs various signal generation, various signal processing, a receiving antenna selection determination process, and the like, a transmitter 200b that generates a radio communication wave and transmits it to the antenna, and the signal processing unit 100b. And a receiver 300b for transmitting a radio communication wave received using the antenna to the signal processing unit 100b. In addition, the receiver 300b is provided with an antenna selection unit 310 that enables selection of electrical connection between the data link radio 10b and the upper antenna 20 and the lower antenna 30.

  The signal processing unit 100b acquires the position information and position information of the own apparatus detected by the state detection device 40, the position information of the communication partner (transmission source), and other information, and calculates the positional relationship between the communication partner and the own apparatus. An antenna suitable for communication with the communication partner is selected from the upper antenna 20 and the lower antenna 30, and a selection result is generated as a selection signal.

  The transmitter 200b is a two-line transmission unit including a transmission unit 1 including a power amplification circuit and a high frequency conversion circuit for the upper antenna 20, and a transmission unit 2 including a power amplification circuit and a high frequency conversion circuit for the lower antenna 30. Composed.

  The receiver 300b operates the built-in antenna selection unit 310 based on the selection signal from the signal processing unit 100b, amplifies the signal received from the selected antenna, and transmits the amplified signal to the signal processing unit 100b.

Next, the operation of the data link radio 10b will be shown and described.
FIG. 11 is a flowchart showing a part of reception processing of the data link radio 10b. The signal processing unit 100b of the data link radio 10b acquires the position information and attitude information of the own apparatus (step S111).
The signal processing unit 100b acquires the position information of the communication partner (step S112).
The communication partner's location information may be acquired by data link communication, or may be selected from previously held location information.
Based on the acquired various information, the signal processing unit 100b calculates which of the upper antenna 20 and the lower antenna 30 is suitable for communication with the communication partner, and selects a suitable antenna (step S113).
The signal processing unit 100b notifies the receiver 300b of the antenna selection result (selection signal). Based on the antenna selection result (selection signal), the receiver 300b operates the built-in antenna selection unit 310, amplifies the signal received from the selected antenna, and transmits the amplified signal to the signal processing unit 100b (step S114).
In this manner, the data link radio 10b can adopt an antenna suitable for the position of the communication partner and enable efficient radio communication.
In addition, the radio communication wave can be received by an antenna that is not easily attenuated by the radio communication wave, and data loss can be reduced.

Next, a third embodiment of the present invention will be described with reference to FIG. The third embodiment is a combination of the features of the data link radio 10 of the first embodiment and the data link radio 10b of the second embodiment.
That is, an antenna switching device is installed in both the transmitter and the receiver. In addition, the same code | symbol is provided to the same part as 1st and 2nd embodiment, and description is abbreviate | omitted.

FIG. 12 is a functional block diagram illustrating the data link radio 10c according to the third embodiment.
The data link radio 10c includes a signal processing unit 100c that performs various signal generation, various signal processing, transmission antenna and reception antenna determination processing, a transmitter 200, a receiver 300b, and the like. Further, the transmitter 200 is provided with an antenna selection unit 210 that enables selection of electrical connection between the data link radio 10c and a plurality of antennas connected to the transmitter 200. Similarly, the receiver 300b is provided with an antenna selection unit 310 that enables selection of electrical connection between the data link radio 10c and a plurality of antennas connected to the receiver 300b.

  The signal processing unit 100c acquires the position information and position information of the own device detected by the state detection device 40, the position information of the communication partner (communication destination, transmission source), and other information, and the position of the communication partner and the own device. The relationship is calculated, an antenna suitable for communication with the communication partner is selected from the upper antenna 20 and the lower antenna 30, and a selection result is generated as a selection signal.

  Based on the selection signal from the signal processing unit 100c, the transmitter 200 operates the built-in antenna selection unit 210, amplifies the signal to be transmitted, and transmits it from a predetermined antenna.

  The receiver 300b operates the built-in antenna selection unit 310 based on the selection signal from the signal processing unit 100c, amplifies the signal received from the selected antenna, and transmits the amplified signal to the signal processing unit 100c.

Next, the operation of the data link radio 10c will be described. The data link radio 10c operates in the same manner as the data link radio 10 at the time of transmission, and operates in the same manner as the data link radio 10b at the time of reception.
That is, the signal processing unit 100c of the data link wireless device 10c acquires the position information and posture information of the own device and also acquires the position information of the communication partner.

  The signal processing unit 100c identifies the transmission operation or the reception operation, calculates the processing of which of the upper antenna 20 and the lower antenna 30 is suitable for communication with the communication partner based on the acquired various information, and is suitable for each communication. Select the antenna.

  The signal processing unit 100c notifies the transmitter 200 and the receiver 300b of the antenna selection result (selection signal). The transmitter 200 and the receiver 300b operate the built-in antenna selection units 210 and 310 based on the antenna selection result (selection signal), and perform communication using the selected antenna.

In this way, the data link radio 10c can adopt an antenna suitable for the position of the communication partner and enable efficient radio communication.
In addition, wireless communication waves can be transmitted and received by an antenna that is not easily attenuated by wireless communication waves, so that data loss and transmission power can be reduced.
Furthermore, it is possible to prevent wireless communication waves from being transmitted in a direction where there is no communication partner, and power saving and security can be improved.
In addition, the electric circuit and components of the transmission system and the reception system can be shared, and the volume of the radio can be reduced, power saving and weight reduction can be achieved. This is particularly useful for flying objects where the space for mounting the radio is limited.
In the description of the above embodiment, the data link radio is used. However, there is no particular limitation as long as it is a radio that is mounted on a flying body and performs communication by selecting a plurality of antennas. Also, the communication partner is not limited to flying objects or ground stations. For example, the data link communication partner may be a satellite, a ship, or an ocean buoy (relay device).

  Further, the calculation processing method is not limited to vector analysis or using a radio wave intermediate plane. Any calculation method may be used as long as an antenna suitable for communication can be identified from position information, posture information (information indicating the relative orientation of a flying object, an antenna, and the like) and position information of a communication partner.

  In addition, the acquisition method of the position information of a communication other party is not limited to what was illustrated. Other methods for acquiring position information include calculation from radar detection values and acquisition of position information of a communication partner via a ground station (base station whose position is fixed). Further, without using the received position information as it is, the movement of the communication partner may be predicted and the predicted value of the movement destination position may be used.

It is explanatory drawing which shows the flying body 1 of one Embodiment. 2 is a functional block diagram showing a data link radio 10. FIG. It is the figure which showed explicitly the area | region unsuitable for the communication of the flying body. 4 is a flowchart showing a part of transmission processing of the data link radio 10; It is a figure which shows the communication of the data link of the flying body 1 and the flying body 2 visually. It is a figure which shows the communication of the data link of the flying body 1 and the ground station 3 visually. It is a figure explaining the attitude | position definition used for system description. It is explanatory drawing which shows the surface system which is an example of a calculation process. It is explanatory drawing which shows the inner product system which is an example of a calculation process. It is a functional block diagram which shows the data link radio | wireless machine 10b. It is a flowchart which shows a part of reception process of the data link radio | wireless machine 10b. It is a functional block diagram which shows the data link radio | wireless machine 10c.

Explanation of symbols

1 Flying object (own aircraft)
2 Flying object (communication partner)
3 Ground Station 10 Data Link Radio 20 Upper Antenna 30 Lower Antenna 40 State Detection Device 100 Signal Processing Unit (Processing Unit)
200 Transmitter 210 Antenna Selection Unit (Transmission System)
300 Receiver 310 Antenna selection unit (reception system)

Claims (14)

In a radio that is mounted on a flying object that independently stands in the atmosphere and communicates by selecting the required antenna from multiple antennas.
A communication signal (communication information) is processed, and a signal processing unit that performs an antenna selection process, a transmitter that generates a communication wave connected to the signal processing unit, and a signal processing unit that receives the communication wave To the receiver and / or the transmitter or receiver, and based on the antenna selection process of the signal processor, the electrical connection between the transmitter or receiver and the plurality of antennas is electrically And a selection unit for switching to
The antenna selection process performed in the signal processing unit is
Position information that changes dynamically with the flight of the flying object to which the radio is mounted, orientation information, mating projectile body by referring to the positional information of the other party projectile and the projectile and the communication partner to the communication partner wherein the positional relationship sequentially deriving processing, based on a result of the sequential performed derivation process, autonomously sequential select an antenna suitable for communicating with the other projectile to the communication partner from the plurality of antennas A radio. The radio apparatus according to claim 1, wherein vector analysis is used in the process of deriving the positional relationship with the flying object that is sequentially performed by the signal processing unit. The antenna selection process includes
To calculate the direction of the relative vector suitable for communicating respectively with the attitude information of the projectile of the plurality of antennas, the partner from the position information of the counterpart projectile to a communication partner with the position information of the projectile Calculate the vector to the flying object ,
Calculate the inner product of the vector of the direction suitable for communication with respect to each calculated antenna and the vector to the opponent flying object ,
The radio device according to claim 2, wherein the calculated inner product value is compared to select an antenna having a larger inner product value . In the process of deriving the positional relationship with the flying object that is sequentially performed by the signal processing unit,
A boundary surface where the communication sensitivity is equal between the plurality of antennas is defined as a radio wave intermediate surface,
2. The radio apparatus according to claim 1, wherein a radio wave intermediate plane defined by reflecting the attitude of the own apparatus is used. In the process of deriving the positional relationship with the flying object that is sequentially performed by the signal processing unit,
Using a virtual plane reflecting the attitude of the own machine that virtually creates a plurality of radio wave midpoints of the plurality of antennas and the position information of the communication partner,
The wireless device according to claim 1, wherein the point indicated by the position information of the communication partner is calculated to be either above or below the virtual plane. In the process of deriving the positional relationship with the flying object that is sequentially performed by the signal processing unit,
Using the virtual plane reflecting the attitude of the aircraft that virtually creates the wing surface of the flying object to be mounted in parallel and the position information of the communication partner,
The wireless device according to claim 1, wherein the point indicated by the position information of the communication partner is calculated to be either above or below the virtual plane.   The radio apparatus according to claim 1, further comprising a data link function.   8. The wireless device according to claim 7, wherein the location information of the communication partner is acquired via a data link. A method for selecting an antenna of a flying object that performs communication by automatically selecting a required antenna from a plurality of antennas that independently fly in the atmosphere ,
A radio that generates and receives communication waves, an upper antenna that is electrically connected to the radio and installed above the wing surface, and that is electrically connected to the radio and installed below the wing surface A flying body comprising a lower antenna, and a selection unit that selectively selects an electrical connection between the radio and the upper antenna or the lower antenna,
The processing unit built in the wireless device is:
Position information of the own device that dynamically varies with the flight attitude information, sequentially deriving processing the positional relationship of the mating projectile body by referring to the positional information of the other party projectile to a communications partner to own device and the communication partner ,
Based on the result of the derivation process performed sequentially, the antenna suitable for communication with the partner flying object as the communication partner is autonomously and sequentially identified,
The antenna selection method, wherein the selection unit electrically selects the upper antenna or the lower antenna based on an identification result of the processing unit. The antenna selection method according to claim 9, wherein vector analysis is used in the process of deriving the positional relationship with the flying object that is sequentially performed by the processing unit. The antenna selection process includes
Calculate the upper and lower relative vectors from the attitude information of the own machine, calculate the vector to the communication partner from the position information of the own machine and the position information of the communication partner,
Calculate the inner product of the calculated upper and lower relative vectors and the vector to the communication partner,
The antenna selection method according to claim 10 , wherein an antenna having a large inner product value is selected by comparing the magnitudes of the calculated inner product values. In the process of deriving the positional relationship with the flying object, which is sequentially performed by the processing unit, the position of the own aircraft virtually reflects the position in the communicable area between the upper antenna and the lower antenna and the same communication sensitivity. defined Te, antenna selection method according to claim 9, wherein the use of radio waves manner intermediate surface is a boundary surface of the position suitable for the communication. In the derivation process of the positional relationship with the flying object that is sequentially performed by the processing unit,
Using the virtual plane that reflects the attitude of the aircraft that is virtually created by spreading the wing surface in parallel and the position information of the communication partner, the point indicated by the position information of the communication partner is above or below the virtual plane. The antenna selection method according to claim 9, wherein any one of the values is calculated.   The antenna selection method according to any one of claims 9 to 13, wherein the position information of the communication partner is acquired through communication between radio units.

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