JP5684042B2 - Receiver and transmission system - Google Patents

Description

  The present invention relates to a receiving apparatus that receives a wirelessly transmitted signal by a directional antenna, and a transmission system including such a receiving apparatus, and more particularly, to a transmitting side apparatus corresponding to various geodetic systems. It is related with the technology which can be turned to.

A receiving device that receives a wirelessly transmitted signal with an antenna having directivity is used in, for example, a wireless transmission system in a remote control monitoring system.
An example of such a remote control monitoring system is a micro reception base station system including fixed wireless transmission between base stations using an FPU (Field Pick-up Unit).

FIG. 4 shows a system example of the micro reception base station system. In the example of FIG. 4, a case is considered where material (for example, video data) is transmitted from the transmission point (A) 1 and the transmission point (B) 4 to the head office 3.
The material from the transmission point (A) 1 that is relatively far from the head office is relayed by the base station 2 and wirelessly transmitted to the head office 3.

In this wireless transmission, first, the transmission unit 11 at the transmission point (A) 1 converts the material into a microwave signal that can be wirelessly transmitted, and transmits a radio wave (signal) from the antenna 12.
Here, the transmitter 11 encodes an SDI (Serial Digital Interface) signal into a TS (Transport Stream) signal, which is a frame format of a fixed-length packet format used for FPU transmission, and modulates it into an intermediate frequency signal. After that, it has a function of performing frequency conversion to the microwave band and transmitting from the antenna 12.

The transmitted radio wave is received by the rotary receiving antenna device 21 of the base station 2 and sent to the receiving unit 22.
Here, the receiving unit 22 has a function of frequency-converting a microwave band signal into an intermediate frequency signal, demodulating the signal into the TS signal, and decoding it into an SDI signal. However, the receiving unit 22 of the base station 2 only needs to have a function for converting to a TS signal without signal degradation at a minimum.

The TS signal is transmitted to the transmission unit 23 and transmitted by radio waves from the fixed antenna 24. Here, similarly to the receiving unit 22, the transmitting unit 23 of the base station 2 only needs to have a function of converting a TS signal into a microwave band at a minimum.
The radio wave transmitted from the base station 2 is received by the fixed antenna 31 of the head office 3, decoded into an SDI signal by the receiving unit 32 and the decoding unit 35, and sent to the main line.

  In addition, the material from the transmission point (B) 4 that is relatively close to the head office 1 is transmitted from the antenna 42 through the transmission unit 41 and received by the rotary reception antenna device 33 of the head office 13. The data is decoded by the decoding unit 35 and sent to the main line.

In such a wireless transmission system, it is important how efficiently the base station 2 can receive radio waves from the transmission point (A) 1. That is, the direction of the rotary receiving antenna device 21 of the base station 2 must be changed according to the position of the transmission point (A).
For this reason, the rotary receiving antenna device 21 mounts a directional antenna on a rotating gantry that can be rotated by a motor drive or the like by remote control from the headquarters 3 and drives the rotating gantry to drive the antenna having directivity. You can change the direction.

This remote control monitoring system operates as follows.
The control packet transmitted to the network by the operator operating the operation terminal 38 of the head office 3 is received by the control terminal station 39 and converted into a serial signal. Here, a plurality of operation terminals and a plurality of control terminal stations are connected to the network, and transmission / reception can be performed by specifying a transmission / reception partner by each device ID.
The serial signal is further modulated, for example, into an analog signal by the modem unit 40 and transmitted to the base station 2.

This analog signal is received by the modem unit 25 of the base station 2, demodulated into a serial signal, and then transmitted to the controlled terminal station 26.
The controlled terminal station 26 decodes the control signal and controls the rotary receiving antenna device 21 to change the direction of the antenna. Monitoring information such as the direction (angle) in the rotary receiving antenna device 21 is sent to the controlled terminal station 26 as a monitoring signal. The controlled terminal station 26 transmits the monitoring information as a serial signal to the modem unit 25, and the modem unit 25 modulates the serial signal to, for example, an analog signal and transmits the analog signal to the head office 3.

The modem unit 40 of the head office 3 demodulates the received signal into a serial signal and transmits it to the control terminal station 39. The control terminal station 39 decodes the received serial signal and transmits a monitoring packet to the network.
The operation terminal 38 receives the monitoring packet, displays it as information on the terminal, and presents it to the operator.

  As described above, it is possible to perform control monitoring in which the operator monitors and changes the direction of the rotary receiving antenna device 21 of the base station 2, but this micro receiving base station system is installed in the base station 2. Reception / transmission level, transmission / reception channel (frequency band), modulation method, transmission output, decoding method in the reception unit 22 and transmission unit 23, for example, signal switch contact selection, signal multiplexing / demultiplexing device signal input / output selection, etc. As with the control of the rotary receiving antenna device 21, the operator can control and monitor by a series of signal transmissions of the operation terminal 38 -the control terminal station 39 -the controlled terminal station 26.

Further, when transmitting directly to the head office 3 such as material transmission from the transmission point (B) 4, the rotary receiving antenna device existing in the head office 3 using the signal transmission path of the operation terminal 38 -the control terminal station 39. The operator can monitor and monitor devices such as 33 and the receiving unit 34 in the same manner as described above.
That is, the direction (angle) of the directional antenna of the rotary reception antenna device 33 of the head office 3 that receives the radio wave transmitted from the antenna 42 at the transmission point (B) 4 is the same as that of the rotary reception antenna device 21. Control monitoring in which the operator monitors and changes this is possible.

  Further, in the above system, as providing more detailed information for adjusting the direction of the receiving antenna, TMCC (Transmission and Multiplexing Configuration Control) information including transmission parameters such as reception frequency and modulation method in the receiving units 22 and 34, Support data such as reception level, margin (Margin Degree), BER (Bit Error Rate), MER (Modulation Error Ratio), delay profile, constellation, etc. are superimposed on the TS signal and transmitted to the head office 3 to generate information There is a method of separating by the unit 36, editing by the information editing unit 37, and displaying on the operation terminal 38.

Regarding the direction calculation method for changing (adjusting) the antenna angle (orientation) of the rotary receiving antenna devices 21 and 33, the receiving point (the directional antenna of the receiving side devices 2 and 3) is determined from the latitude information and longitude information of the transmitting point. 21 and 33) to calculate the direction of the transmission point (antennas 12 and 42 of the transmission side devices 1 and 4).
As a result, the receiving side controls the direction of the rotary receiving antenna devices 21 and 33 to an angle assumed to be the transmission direction in advance without confirming the reception level of the transmission radio wave, thereby shortening the work time for establishing the transmission path. Yes.

Examples of the direction adjustment method using latitude / longitude information include a method of performing direction adjustment in advance by notification from a communication side from a transmission side, and direction tracking of a transmitter by a rotary antenna reception device using GPS information. .
Here, a point to be noted is a geodetic system that becomes a reference coordinate system of latitude and longitude. The geodetic systems used in Japan include the Japanese geodetic system and the world geodetic system. The Japanese geodetic system is a geodetic system that belongs to the category of so-called local coordinate systems that can be applied only in the vicinity of Japan. The world geodetic system is a geodetic system that can be applied to the entire earth, and is a standard geodetic system for surveying and the like.
The problem is that a difference of about 300 m to 400 m occurs to represent the same point (latitude and longitude) due to these geodetic system shifts.

An example of using such a technique is the above-described micro reception base station. In wireless transmission using a rotary antenna device that adjusts the angle of a directional antenna, the position (latitude) between transmitting and receiving antennas is used. (Longitude) recognition deviation is a big problem, and angular deviation is greatly attenuated in decibel conversion.
For example, the misalignment of 300 m on the other side at a point 10 km away is 1.7 degrees at an angle of (300 / 20000π × 360).

FIG. 5 is an example of the electric field value attenuation when the direction of these antennas is deviated from the angle at which the transmitting and receiving antennas are opposed (opposite angle) (extracted from the standard directivity characteristics of parabolic mirrors and examination standards related to the Radio Law). However, for example, when a 0.9φ antenna is used at a frequency of 10 G band, the deviation of 1.7 degrees is πD / λ × sinθ (π × 0.9 / 0.03 × sin (1.7 °)). ), The attenuation is about 10 dB from the table shown in FIG.
If this is converted to a transmission output (10log (output) = (decibel value−10), output = 1/10 × original value), which corresponds to 1/10, the problem is large. Is clear.

There are many recent GPS receivers that can display the Japanese geodetic system and the world geodetic system. There are not a few cases where it is unknown whether it is a system or not, and it is also rare to tell the operator of the receiving apparatus which latitude and longitude information of the geodetic system.
Under such circumstances, in order to eliminate a recognition shift in the geodetic system between the transmitting side and the receiving side, a method that allows the operator to verify the geodetic system of latitude and longitude information is required.

Further, the system as shown in FIG. 4 is used as a system for wirelessly transmitting broadcast station materials, for example.
That is, for example, the transmission point (A) 1 or the transmission point (B) 4 is a transmission side device mounted on a vehicle or a helicopter, and the base station that is fixedly installed from the transmission side device (A) 1 that is relatively far away. The material is wirelessly transmitted to the head office 3 via 2 (relay station), and the material is directly wirelessly transmitted to the head office 3 from the transmission side device (B) 4 at a relatively short distance.

For such a broadcast radio transmission system, there is a geodetic system that has been used for each broadcasting station, and by unifying the geodetic system within the broadcasting station, it is possible to transmit and receive without being aware of the above-described misregistration. Wireless transmission of the material with the antenna facing each other can be performed.
However, when a new wireless transmission system is to be constructed, it is not always easy to unify the existing wireless transmission system and the geodetic system, or to use a new receiving device in the existing wireless transmission system. However, there is a problem in that the versatility of the wireless transmission system and the receiving side device is poor.

Specifically, broadcasting stations, newspaper companies, news agencies, etc. that use wireless transmission systems have been operating systems that have adopted specific geodetic systems for a long time, adopting wireless transmission systems and receiver devices. When trying to do so, it is necessary to construct a transmission line while matching the geodetic system to an existing system, increasing the work load of the work, and manufacturing a wireless transmission system and a receiving device. In some cases, it was necessary to design for each geodetic system, which was a major factor that increased manufacturing costs.
In addition, there are many cases where the geodetic system adopted in Japan differs from the geodetic system adopted in foreign countries, and when trying to sell radio transmission systems and receiver devices manufactured in Japan to foreign companies There is a problem similar to the above.

  In Patent Document 1, in a system for adjusting the direction from the remote control device side to the direction of the transmission device that moves the rotating parabolic antenna of the reception side device, the position information of the moving transmission device and the reception state in the position information are remotely controlled. An invention for displaying on a display unit of a control device is disclosed.

JP 2007-134915 A

  The present invention has been made in view of the above-described conventional circumstances, and in a reception device that receives a signal transmitted from a transmission-side device with a directional antenna, and a transmission system including such a reception device, The purpose is to rationally solve the above problem by realizing a function of correcting the displacement of the geodetic system.

  A receiving apparatus according to the present invention includes a position information acquisition unit that acquires position information of a transmitting side apparatus in a receiving apparatus that receives a signal (for example, a material) transmitted from a transmitting side apparatus using a directional antenna, and an antenna. Adjustment means for changing the orientation of the data, relation storage means for storing the conversion relation between the plurality of geodetic systems, level detection means for detecting the reception level of the signal transmitted from the transmission side device by the antenna, and the conversion relation Based on candidate calculation means for obtaining a plurality of position candidates obtained by converting the position information of the transmitting device acquired by the position information acquisition means for each of a plurality of geodetic systems; And adjustment control means for setting the antenna in the direction in which the reception level detected by the level detection means is the highest, each directed to a position candidate. That.

Here, in the present invention, when the position information acquisition unit has a system configuration in which, for example, the transmission side apparatus wirelessly transmits the position information acquired by the GPS receiver or the like as a signal, the function of receiving the position information signal is used. In the case where the operator of the receiving device obtains the position information from the operator of the transmitting device using the communication device, it is configured as a function for receiving the position information input from the operator of the receiving device. do it.
Even if the operator inputs the position information of the transmitting apparatus to the receiving apparatus in this way, the antenna position is changed based on the reception level thereafter, so the initial position information input by the operator Even if it is somewhat inaccurate, there is no problem as long as the signal from the transmitting device can be received by the receiving device.

Further, in the present invention, the adjustment control means sets the antenna to the midway position (direction) when the reception level is the highest at the midway of change (direction) that directs the antenna to a plurality of position candidates. In addition, the antenna may be set to the position (direction) of the position candidate having the highest reception level among the position candidates, and in this way, the geodetic system in which the transmission side apparatus and the reception apparatus are matched. Can be verified.
In order to provide verification of such a geodetic system, a plurality of position candidates and the reference geodetic system, the position information with the highest reception level, the reference geodetic system, etc. are given to the operator of the receiving device. It may be displayed and presented.

Further, in the present invention, the adjustment control means changes the direction of the antenna at a high speed from the direction in which the antenna is currently directed to the position candidate having the smallest angle, and changes the direction of the antenna between the plurality of position candidates at a low speed. And the direction of the antenna may be changed at a high speed in the direction with the highest reception level.
By controlling the speed of changing the direction of the antenna in this way, it is possible to detect the reception level in the middle of changing the direction of the antenna with high accuracy, and to detect the antenna in the path that passes each position candidate with high accuracy. The direction can be changed.

  In addition, the present invention can be implemented as a transmission system including a transmission-side device that transmits a signal and a reception device that receives the signal through a directional antenna, and the position information of the transmission-side device is transmitted to the transmission side. A communication transmitter for transmission by an operator, and a communication receiver for reception of positional information of the transmission side device by the reception side operator. The reception side device receives the positional information of the transmission side device input from the reception side operator. Position information acquisition means for acquiring the position, adjustment means for changing the direction of the antenna, relation storage means for storing the conversion relation between a plurality of geodetic systems, and detection of the reception level by the antenna of the signal transmitted from the transmission side device And a candidate for obtaining a plurality of position candidates obtained by converting the position information of the transmitting device acquired by the position information acquiring means for each of a plurality of geodetic systems based on the conversion relationship. Adjustment means for setting the antenna in the direction in which the reception level detected by the level detection means is the highest, by changing the direction of the antenna by the output means and the adjustment means and directing the antenna to each of the plurality of position candidates. The transmission system can be provided.

Each functional means constituting the present invention may be configured as a function configured by executing a computer program by computer hardware such as a processor or a memory, or a hardware circuit including an electronic component. You may comprise.
In the present invention, a parabolic antenna can be used as an antenna having directivity, but the present invention is not limited to this, and various types of directional antennas can be used.

According to the present invention, the receiving apparatus calculates the position information of the transmitting side apparatus as position candidates for each of the plurality of geodetic systems, and sets the directional antenna in the direction in which the reception level is highest based on these position candidates. Therefore, when trying to adopt a new wireless transmission system or receiving side device for the existing wireless transmission system, it is possible to save work and cost for matching the existing system and geodetic system, The versatility of the wireless transmission system and the receiving device can be remarkably improved.
Further, according to the present invention, since the reception level for each geodetic system can be detected, by presenting this to the operator, it is possible to verify the deviation of the geodetic system between the receiving device and the transmitting side device. Become.

It is a functional block diagram of the receiver which concerns on one Embodiment of this invention. It is a figure explaining the process sequence of the adjustment control of the antenna which concerns on one Embodiment of this invention. It is a figure explaining the adjustment control of the antenna which concerns on one Embodiment of this invention. It is a figure which shows an example of the micro reception base station system which can apply this invention. It is a figure which shows the example of electric field value attenuation | damping at the time of shifting the direction of an antenna from the angle (opposing angle) which the transmission / reception antenna opposes.

The present invention will be specifically described based on an embodiment shown in FIGS.
1 corresponds to the transmission point (A) 1 and the base station 2 or the transmission point (B) 4 and the head office 3 in the system shown in FIG. In the embodiment described below, a rotary parabolic antenna having directivity of a base station 2 that serves as a receiver for a signal wirelessly transmitted from a fixed parabolic antenna 12 of a transmitting device that constitutes a transmission point (A) 1. 21, or a signal transmitted wirelessly from the fixed parabolic antenna 42 of the transmitting side device forming the transmission point (B) 4 is received by the rotating parabolic antenna 33 having directivity of the head office 3 that forms the receiving device. It corresponds to the part.

The wireless transmission system illustrated in FIG. 1 includes a transmission-side device 51 that wirelessly transmits a signal including a material, and a reception device 60 that receives a signal from the transmission-side device using a rotating parabolic antenna 61 having directivity. .
The transmission-side device 51 wirelessly transmits a signal including a material using a fixed parabolic antenna 52. Here, since the receiving device 60 is fixedly installed, the transmitting-side device 51 wirelessly transmits a signal to the receiving device 60 existing at a known position by the parabolic antenna 52.

Here, in the present embodiment, the transmission-side device 51 is a system that can transmit its own location information from the parabolic antenna 52, and the transmission-side device 51 uses the location information received by the attached GPS receiver 53 as a material. Together with or separately from the material.
In the present embodiment, the operator 54 of the transmission-side device 51 can also notify the position information of the transmission-side device 51 to the operator 73 of the reception device 60 by transmitting the information to each other using the mutual wireless communication devices 55 and 74. Yes, the operator 54 can notify the operator 74 of the position information received by the GPS receiver 53.
In the present embodiment, the location information of the transmission side device is the latitude and longitude information of the transmission side device. However, these expressions will be described as appropriate.

The receiving device 60 includes an adjustment unit 69, a reception unit 62, a position information acquisition unit 64, a candidate calculation unit 65, a relationship storage unit 66, an adjustment control unit 67, a level storage unit 68, and an operation unit 70.
The adjusting unit 69 is a rotating base that instructs the parabolic antenna 61, and rotates by motor driving or the like according to a control signal input from the adjusting control unit 67 to change the direction of the parabolic antenna 61.

  The reception unit 62 corresponds to the reception unit 22 or the reception unit 34 described above, and performs radio reception processing on the signal transmitted from the parabolic antenna 52 of the transmission side device 51 by the parabolic antenna 61. The reception unit 62 includes level detection means 63 that detects the reception level of the signal wirelessly received by the parabolic antenna 61, and the detected reception level is input to the adjustment control means 67.

The position information acquisition unit 64 acquires the position information of the transmission side device 51 from the signal received by the reception unit 62 and inputs the position information to the candidate calculation unit 65.
In the present embodiment, the operator 73 can input the position information of the transmission-side device 51 notified as described above by operating the input unit of the operation unit 70, and the position information acquisition unit 64 The position information of the transmission side device input from the operator 73 is received and input to the candidate calculation means 65.

The relationship storage means 66 is a memory table that stores the conversion relationship between a plurality of geodetic systems. For example, as described in the world geodetic system and the Japanese geodetic system, the positional information (latitude / longitude information) of the transmission side device 51 is obtained. It stores relationship information that is converted between multiple geodetic systems.
The candidate calculation means 65 calculates a plurality of position candidates obtained by converting the position information of the transmission side device 51 acquired by the position information acquisition means 64 for each of a plurality of geodetic systems based on the conversion relation stored in the relation storage means 66. . That is, for the acquired position information (latitude / longitude), a latitude / longitude having a different value for each geodetic system is calculated as a candidate for a position where the transmission side device 51 exists.

The adjustment control unit 67 inputs a control signal for directing the parabolic antenna 61 to each of the plurality of position candidates calculated by the candidate calculation unit 65 to the adjustment unit 69. That is, the direction of the parabolic antenna 61 is changed so as to follow each position candidate.
Further, the adjustment control means 67 associates the reception level detected by the level detection means 63 with the respective detection positions (orientations) while the direction of the parabolic antenna 61 is changed in this way. And the control signal for directing the parabolic antenna 61 to the detection position (orientation) having the highest reception level among the reception levels stored in the level storage means 68 when the change process for tracing each position candidate is completed. Input to the adjusting means 69.

Therefore, regardless of which geodetic system the position information of the transmission side device 51 is based on, the parabolic antenna 61 of the reception device 60 can accurately face the transmission side device 51 and receive a signal with high quality. it can.
The adjustment control unit 67 stores the detected reception level in association with each position candidate in the level storage unit 68, and when the change process for tracing each position candidate is completed, the reception stored in the level storage unit 68 is stored. A method may be adopted in which a control signal for directing the parabolic antenna 61 to the position candidate (direction) that is the highest reception level among the levels is input to the adjustment unit 69.

  In addition, in order to verify the geodetic system, a plurality of position candidates and the reference geodetic system, the position information having the highest reception level, the reference geodetic system, and the like are displayed on the display screen 72 of the operation unit 70. It may be displayed and presented to the operator 73.

Next, the processing operation of the wireless transmission system configured as described above will be described in more detail.
First, as an example in Japan, the relationship between two geodetic systems, the Japanese geodetic system and the world geodetic system, will be described. This has already been clarified in the calculation formula, and wy is the latitude of the world geodetic system, wx is the longitude of the world geodetic system, jy is the latitude of the Japanese geodetic system, and jx is the longitude of the Japanese geodetic system. The conversion formula between the world geodetic system and the Japanese geodetic system is as follows.

Conversion formula from Japanese geodetic system to world geodetic system (Formula 1)
wy = ji-ji × 0.00010695 + jx × 0.000017464 + 0.0046017
wx = jx-jy * 0.000046038-jx * 0.000083043 + 0.010040

Conversion formula from World Geodetic System to Japanese Geodetic System (Formula 2)
jy = wy × 1.000106961-wx × 0.000017467-0.004602017
jx = wx × 1.000083049 + wy × 0.000046047−0.010041046

  Such conversion formulas between a plurality of geodetic systems are stored in the relation storage means 66, and by referring to the stored information in the relation storage means 66, the direction of the parabolic antenna 61 is changed in the procedure shown in FIG. Control to adjust is performed, and the parabolic antenna 61 can be finally set in the direction in which the reception level is highest.

When the position information acquisition unit 64 acquires the position information of the transmission-side device 51 that is the latitude and longitude of some geodetic system, the candidate calculation unit 65 stores the relationship information about the position information based on the conversion formula of the relationship storage unit 66. The latitude and longitude based on all the geodetic systems stored in the means 66 are calculated as position candidates (that is, candidates for the target angle for directing the parabolic antenna 61) (step S1).
In other words, the latitude / longitude of the transmission side device is regarded as being transmitted in a certain geodetic system, and the reception device converts it into a geodetic system used in its own position information (latitude / longitude). Thereby, the direction which opposes a transmission side apparatus correctly based on the geodetic system of a receiver can be derived | led-out. Since the receiving apparatus is fixedly installed, the correct latitude and longitude based on a certain geodetic system is known.

Then, the adjustment control means 67 outputs a control signal to the adjustment means 69 to adjust the direction of the parabolic antenna to the target angle of the position candidate that can be reached in the shortest direction from the direction in which the parabolic antenna 61 is currently facing (step S2). .
For example, as shown in FIG. 3, three position candidates calculated by the candidate calculation means 65 (a transmission point (A) based on the geodetic system 1, a transmission point (B) based on the geodetic system 2), and a transmission point based on the geodetic system 3 (C)), the position candidate that can be reached in the shortest with respect to the current antenna angle is the position candidate (transmission point (C)), so the adjustment control means 67 makes the direction of the parabolic antenna 61 relatively It is changed at high speed and is directed to the position candidate (transmission point (C)).
In order to prevent overrun to the target angle, a known method of decelerating from a predetermined angle may be employed.

The adjustment control means 67 is a level storage means for the reception level until the parabolic antenna 61 reaches the first position candidate (transmission point (C)) and the reception level when it reaches the position candidate. 68 (step S3).
Next, the parabolic antenna 61 is configured so that the adjustment control unit 67 passes the other position candidate (transmission point (B)) halfway to the position candidate (transmission point (A)) farthest from the current antenna angle. And the reception level by the parabolic antenna 61 in this direction change is held in the level storage means 68 in the same manner as described above (steps S4 to S7).

  Here, the adjustment control means 67 has a relatively low speed (preferably, the direction of changing the direction of the parabolic antenna 61 between these position candidates (transmission point (A), transmission point (B), transmission point (C)). , A sufficiently low speed) is output to the adjusting means 69. As a result, if the direction is changed at high speed, there is a possibility that the correspondence between the angle of the antenna and the reception level may be shifted, but such a problem can be prevented.

Then, after the parabolic antenna 61 reaches the final position candidate (transmission point (A)), the adjustment control means 67 refers to the level storage means 68 to determine the position (position candidate or these position candidates with the highest reception level). The parabolic antenna 61 is finally set in the direction of the position (step S8).
The change of the parabolic antenna 61 in the final setting direction may be performed at high speed.
Further, the adjustment control means 67 sends to the operation unit 70 a position candidate geodetic system in which the direction of the parabolic antenna 61 is last set, a position candidate geodetic system closest to the position in which the direction of the parabolic antenna 61 is set last. It can be output and displayed on the display unit 72, which can be used for the operator 73 to instruct the geodetic system to the operator of the transmission device.

In addition to the conventional fine adjustment function on the operation terminal screen (reception level search within a predetermined angle of the target angle and stopping at the highest level point), the present invention is a new automatic direction adjustment with geodetic system verification. It is effective to add functions. In the first place, if the geodetic system of the transmission point latitude and longitude is implicitly known, it should be done only by adjusting the normal direction, and when the geodetic system is unknown, this function is used only once. , Time can be used effectively. In addition, for the operator, the same method as in the case of normal control is performed, and after that, the search can be performed mechanically and automatically, so that the operator's effort is not required.
The present invention can be applied not only to the direction adjustment with respect to a fixedly installed transmission point, but also to a prior geodetic system work or the like based on a heliport position particularly in tracking by GPS.

51: Transmitter device, 52: Fixed parabolic antenna,
53: GPS receiver 54: Transmitting operator
55: Wireless transmitter 60: Receiver
61: Rotary parabolic antenna 62: Receiver
63: level detection means, 64: position information acquisition means,
65: candidate calculation means, 66: relation storage means,
67: Adjustment control means, 68: Level storage means,
69: Adjustment means, 70: Operation part,
71: input means, 72: display means,
73: Receiver operator, 74: Radio receiver,

Claims (3)

In a receiving apparatus that receives a signal transmitted from a transmitting-side apparatus with an antenna having directivity,
Position information acquisition means for acquiring position information of the transmission side device;
Adjustment means for changing the orientation of the antenna;
Relationship storage means for storing conversion relationships between a plurality of geodetic systems;
Level detection means for detecting the reception level of the signal transmitted from the transmission side device by the antenna;
Based on the conversion relationship, candidate calculation means for obtaining a plurality of position candidates obtained by converting the position information of the transmission side device acquired by the position information acquisition means for each of a plurality of geodetic systems;
Adjustment control means for setting the antenna in a direction in which the reception level detected by the level detection means is the highest by changing the orientation of the antenna to each of the plurality of position candidates by the adjustment means,
A receiving apparatus comprising: The receiving device according to claim 1,
The adjustment control means changes the direction of the antenna at a high speed to a position candidate having the smallest angle from the direction in which the antenna is currently facing, changes the direction of the antenna at a low speed among a plurality of position candidates, and receives the reception level. The receiving apparatus is characterized in that the direction of the antenna is changed at a high speed in the direction with the highest value. In a transmission system including a transmission-side apparatus that transmits a signal and a reception apparatus that receives the signal by an antenna having directivity,
A transmitter for communication in which the transmission side operator transmits the position information of the transmission side device;
A receiver for receiving the position information of the transmission side device by the reception side operator, and
The receiving side device
Position information acquisition means for acquiring position information of the transmission side device input from the reception side operator;
Adjustment means for changing the orientation of the antenna;
Relationship storage means for storing conversion relationships between a plurality of geodetic systems;
Level detection means for detecting the reception level of the signal transmitted from the transmission side device by the antenna;
Based on the conversion relationship, candidate calculation means for obtaining a plurality of position candidates obtained by converting the position information of the transmission side device acquired by the position information acquisition means for each of a plurality of geodetic systems;
Adjustment control means for setting the antenna in a direction in which the reception level detected by the level detection means is the highest by changing the orientation of the antenna to each of the plurality of position candidates by the adjustment means,
A transmission system comprising:

Images