Obstacle detector, wireless receiver, wireless transmitter, and wireless communication system

A technology for obstacle detection and wireless transmission, which is applied in satellite radio beacon positioning systems, radio wave measurement systems, measurement devices, etc., can solve the problem of not being able to quickly follow the rapid changes of radio waves, not being able to improve the quality of radio wave reception, and not being able to use the receiving antenna selection Technology or diversity technology and other issues to achieve the effect of improving the quality of reception

Inactive Publication Date: 2010-03-17
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the characteristics of radio waves such as reception level and phase difference cannot be analyzed, it is impossible to use reception antenna selection technology or diversity technology, and there is a problem of being unable to quickly follow rapid changes in radio waves
[0008] In addition, since the antenna faci

Method used

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  • Obstacle detector, wireless receiver, wireless transmitter, and wireless communication system
  • Obstacle detector, wireless receiver, wireless transmitter, and wireless communication system
  • Obstacle detector, wireless receiver, wireless transmitter, and wireless communication system

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0023] Embodiment 1

[0024] figure 1 It is a configuration diagram showing a wireless communication system according to Embodiment 1 of the present invention.

[0025] in figure 1 Among them, GPS satellites 1-1 to 1-N are satellites that orbit the earth and transmit GPS radio waves superimposed with GPS data. The GPS data includes not only its own operating information (indicating which orbit the GPS satellite is orbiting the earth). Information about the surrounding operation), but also includes the operation information of all GPS satellites orbiting the earth.

[0026] in figure 1 In the figure, N GPS satellites are shown, but since there are still GPS satellites that are orbiting to a position invisible from the moving body 2, in fact, there are more than N GPS satellites orbiting the earth.

[0027] In addition, GPS radio waves transmitted from GPS satellites 1-1 to 1-N are microwaves with high linear propagation properties. Therefore, when there are no obstacles in the straigh...

Example Embodiment

[0087] Embodiment 2

[0088] In the first embodiment described above, it is shown that the obstacle detection unit 25 of the obstacle detection device 12 calculates the direction in which the obstacle 3 exists, and outputs obstacle information indicating the direction in which the obstacle 3 exists to the wireless receiving device 13 For example, it may also be that the obstacle detection unit 25 records the trajectory of the current position measured by the position measuring unit 23 and the change in the direction of the obstacle 3, and changes the trajectory of the current position and the direction of the obstacle 3 , Determine the shape and location of the obstacle 3.

[0089] Hereinafter, the processing content of the obstacle detection unit 25 will be specifically described.

[0090] Image 6 It is an explanatory diagram showing the shape and position of the obstacle 3. which is, Image 6 It is an explanatory diagram of a two-dimensional display of the shape and position of ...

Example Embodiment

[0100] Embodiment 3

[0101] In the first embodiment above, it is shown that the radio wave receiving processing unit 33 of the wireless receiving device 13 reduces the sensitivity of the wireless receiving antenna 31-1 in the direction where the obstacle 3 is present, and increases the sensitivity in the direction where the obstacle 3 is not present. The wireless receiving antennas 31-2 to 31-M are sensitive to radio waves. However, the radio wave receiving processing unit 33 may combine the radio waves received by the wireless receiving antennas 31-1 to 31-M to improve radio wave reception. quality.

[0102] Hereinafter, the processing content of the radio wave reception processing unit 33 will be specifically described.

[0103] The radio wave coming from the direction where the obstacle 3 does not exist is highly likely to be a direct wave, and the radio wave coming from the direction where the obstacle 3 exists is highly likely to be the reflected wave of the obstacle 3.

[0104...

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Abstract

A radio receiving device acquires obstacle information showing a direction in which an obstacle is existing from an obstacle detecting device 12, and controls radio receiving antennas 31-1 to 31-M according to the obstacle information so as to receive an electric wave. As a result, the radio receiving device can improve the quality of the reception of an electric wave even when an obstacle 3 is existing, and can also respond quickly to a rapid change in electric waves.

Description

technical field [0001] The present invention relates to an obstacle detection device that monitors the reception status of radio waves transmitted from GPS satellites to detect obstacles around the device, a wireless receiving device that receives radio waves by controlling an antenna based on the detection results of the obstacle detection device, and a device that transmits radio waves A wireless transmission device, and a wireless communication system that transmits or receives radio waves. Background technique [0002] For example, when a wireless receiving device that receives TV broadcasts and a wireless transmitting device that wirelessly transmits data to the outside are mounted on a mobile body (such as a car) and used, obstacles such as buildings and trees around the mobile body follow Changes greatly with the movement of the moving object. [0003] Therefore, due to multipath caused by reflection of radio waves by obstacles, fading due to absorption of radio wave...

Claims

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Application Information

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IPC IPC(8): H04B1/16H04B7/26
CPCG01S19/28G01S19/39
Inventor 对马尚之虻川雅浩村山修赤津慎二奥村信义
Owner MITSUBISHI ELECTRIC CORP
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