KR20090059768A - Apparatus and method for automatically controlling sensitivity of antenna - Google Patents

Apparatus and method for automatically controlling sensitivity of antenna Download PDF

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Publication number
KR20090059768A
KR20090059768A KR1020070126803A KR20070126803A KR20090059768A KR 20090059768 A KR20090059768 A KR 20090059768A KR 1020070126803 A KR1020070126803 A KR 1020070126803A KR 20070126803 A KR20070126803 A KR 20070126803A KR 20090059768 A KR20090059768 A KR 20090059768A
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KR
South Korea
Prior art keywords
antenna
reception sensitivity
angle
length
reference value
Prior art date
Application number
KR1020070126803A
Other languages
Korean (ko)
Inventor
김성훈
Original Assignee
주식회사 대우일렉트로닉스
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 주식회사 대우일렉트로닉스 filed Critical 주식회사 대우일렉트로닉스
Priority to KR1020070126803A priority Critical patent/KR20090059768A/en
Publication of KR20090059768A publication Critical patent/KR20090059768A/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/08—Means for collapsing antennas or parts thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/318—Received signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N17/00—Diagnosis, testing or measuring for television systems or their details
    • H04N17/04—Diagnosis, testing or measuring for television systems or their details for receivers

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Multimedia (AREA)
  • Circuits Of Receivers In General (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)

Abstract

An apparatus for automatically controlling the antenna receive sensitivity and a method thereof are provided to receive a broadcast signal more stably even in any communication environment. An antenna driving unit(100) changes the angle or length of an antenna through antenna driving. A gain calculator(120) calculates the receive sensitivity corresponding to the change in the angle or length of the antenna. A controller(114) inspects the antenna receive sensitivity through the gain calculator. If the receive sensitivity is less than a reference value, the controller automatically changes the angle or length of the antenna through the control for the antenna driving unit.

Description

Antenna reception sensitivity automatic adjustment device and method {APPARATUS AND METHOD FOR AUTOMATICALLY CONTROLLING SENSITIVITY OF ANTENNA}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for automatically adjusting the reception sensitivity of an antenna. In particular, the present invention relates to a strength of a digital broadcast signal received by being mounted in a digital broadcast signal receiver such as a vehicle digital multimedia broadcasting (DMB) receiver. The present invention relates to an apparatus and method for automatically adjusting an antenna reception sensitivity, which continuously measures antenna reception sensitivity so that the reception sensitivity of the antenna is maintained above a predetermined reference value so that a broadcast signal can be more stably received in any communication environment.

In general, a digital broadcasting receiver such as a vehicle DMB receiver is installed in a vertical direction on a vehicle when an external antenna is installed, because the broadcast station transmits the broadcast in 'vertical polarization' at the time of radio wave transmission.

However, when a vehicle passes through an urban area surrounded by buildings, radio waves spread through the air and are reflected on buildings or walls, causing so-called 'fading', refraction, and diffraction. Has a problem that the reception sensitivity of the antenna is lowered because it is converted to horizontal polarization.

On the other hand, when the reception sensitivity of the antenna as described above, in the prior art, the user must manually adjust the angle or length of the signal well while changing the direction of the antenna by manual operation, there was a problem inconvenient in use.

Therefore, if the angle or length of the antenna is automatically adjusted so that the antenna reception sensitivity is maintained at a constant level, it is expected that the convenience of use will be greatly increased.

Accordingly, the present invention continuously measures the antenna reception sensitivity based on the strength of the broadcast signal in a digital broadcast signal receiver such as a vehicle DMB receiver, and automatically adjusts the antenna angle or length so that the reception sensitivity of the antenna is maintained above a predetermined reference value. It is an object of the present invention to provide a device and method for automatically adjusting antenna reception sensitivity to more stably receive a broadcast signal in a communication environment.

The present invention for achieving the above object is an antenna reception sensitivity automatic adjustment device, an antenna driver for changing the angle or length of the antenna by driving the antenna up or down, and calculates the reception sensitivity according to the change in the angle or length of the antenna Continuously checking whether the antenna reception sensitivity falls below a predetermined reference value through the gain calculator and the gain calculator, and automatically controlling the antenna driver to change the angle or length of the antenna when the reception sensitivity falls below the reference value. And a control unit for controlling the reception sensitivity of the antenna to be maintained above the reference value.

In addition, the present invention is a method for automatically adjusting the reception sensitivity of the antenna, (a) continuously checking whether the reception sensitivity of the antenna falls below a predetermined reference value, (b) the reception sensitivity of the antenna is less than the reference value Changing the angle or length of the antenna when falling down; (c) detecting the reception sensitivity of the antenna according to the angle or length change; and (d) receiving sensitivity of the antenna rises above the reference value. If the antenna angle or length is stopped, maintaining the antenna angle or length.

In the present invention, in the method for automatically adjusting the antenna reception sensitivity mounted on a digital broadcasting receiver such as a vehicle DMB receiver, the reception sensitivity of the antenna falls below a reference value by continuously measuring the antenna reception sensitivity based on the strength of the received digital broadcasting signal. In this case, there is an advantage that the broadcast signal can be more stably received in any communication environment by automatically adjusting the reception sensitivity of the antenna to be maintained above a predetermined reference value while changing the angle or length of the antenna.

Hereinafter, with reference to the accompanying drawings will be described in detail the operating principle of the present invention. In the following description of the present invention, when it is determined that a detailed description of a known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. Terms to be described later are terms defined in consideration of functions in the present invention, and may be changed according to intentions or customs of users or operators. Therefore, the definition should be made based on the contents throughout the specification.

Looking at the specific core technical gist of the present invention, if the reception sensitivity of the antenna falls below the reference value by continuously measuring the antenna reception sensitivity based on the strength of the received digital broadcast signal, the antenna reception while changing the angle or length of the antenna It is easy to achieve what is intended in the present invention through a technique that automatically adjusts the sensitivity to remain above a certain reference value.

FIG. 1 is a schematic block diagram of a DMB receiver for a vehicle among digital broadcasting receivers having an automatic sensitivity adjustment of an antenna according to an exemplary embodiment of the present invention.

Referring to FIG. 1, a DMB receiver includes a key input unit 116, a controller 114, a tuner 102, a baseband 103, a decoder 104, a graphics processor 110, and an LCD. The display unit 112 is included. In addition, the antenna driver 100 and the gain calculator 120 for automatic adjustment of the antenna reception sensitivity according to an embodiment of the present invention further includes.

First, the key input unit 116 includes a plurality of numeric keys and function keys for various operation commands of the DMB receiver. The key input unit 116 generates key data corresponding to the key input selected by the user and applies the generated key data to the controller 114. The tuner unit 102 tunes a broadcast signal of a channel selected by the user. The baseband unit 103 converts the broadcast signal transmitted from the tuner 102 into a digital form, demodulates the signal, and separates the demodulated signal into an audio signal and a multimedia signal.

The A / V decoder 104 performs decoding on the multimedia signal transmitted from the baseband unit 103 and includes an MPEG decoder 106 and a data decoder 108. The MPEG decoder 106 performs decoding on multimedia data, and the data decoder 108 performs decoding on various data.

The memory unit 118 stores a predetermined program that controls the overall operation of the DMB receiver, and temporarily stores data input / output when the overall operation of the DMB receiver is performed by the controller 114. In addition, according to an embodiment of the present invention, when the antenna angle or length for antenna adjustment is automatically adjusted, the antenna reception sensitivity value according to the angle or length change calculated from the gain calculator 120 is temporarily stored.

The gain calculator 120 calculates a reception sensitivity of the antenna 130 by measuring a signal strength of the digital broadcast signal to the base band unit 103 according to an angle or length change of the antenna 130. The antenna driver 100 includes a motor capable of rotating the angle of the antenna 130 up and down and a motor capable of adjusting the length of the antenna 130 to change the angle or length of the antenna under the control of the controller 114. Let's do it.

The control unit 114 uses a key input unit 116 implemented as a plurality of numeric keys / function keys provided on the outer surface of the DMB receiver and a plurality of function keys displayed as a touch screen on the LCD display 112. The overall operation of each component of the DMB receiver is controlled according to a user's key input, and decoding is performed on the MPEG coded digital broadcast signal to be reproduced and displayed on the LCD display 112.

In addition, the control unit 114 measures the reception sensitivity of the antenna 130 through the gain calculator 120 for the automatic adjustment of the antenna reception sensitivity according to an embodiment of the present invention, the reception sensitivity of the antenna 130 When falling below a predetermined reference value, the angle of the antenna 130 in the up and down or rotational direction so that the reception sensitivity of the antenna 130 is higher than the predetermined reference value while automatically changing the angle or length of the antenna through the antenna driver 100. Adjust or lengthen or shorten the length of the antenna 130.

Figure 2 is to adjust the angle or length of the antenna automatically according to the reception sensitivity of the digital broadcast reception signal in the automatic antenna reception sensitivity adjustment device mounted on the vehicle DMB receiver according to an embodiment of the present invention to maintain the optimum reception sensitivity The operation control flow is shown.

Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2. Meanwhile, in describing the embodiments of the present invention, for convenience of description, the operation of the antenna reception sensitivity automatic adjustment device mounted in the DMB receiver will be described as an example, but the same will be applied to the various digital broadcasting receivers equipped with the antenna reception sensitivity automatic adjustment device. Applicable

First, the control unit 114 of the DMB receiver waits for a user's command through the key input unit 116 when the power is turned on (S200).

At this time, the user inputs the number of the channel to be watched using the key input unit 116 or the remote controller. If there is a key input for channel setting from the user, the controller 114 displays the key input unit 116 in step S202. ) Receives the digital broadcast signal of the channel selected by the user and displays it on the LCD display 112.

On the other hand, as described above, while receiving the digital broadcast signal of the channel selected by the user and to display on the LCD display 112, the control unit 114 through the gain calculation unit 120 according to the present invention in step (S204) The intensity of the digital broadcast signal is periodically measured to measure the reception sensitivity of the antenna 130.

Subsequently, the controller 114 checks whether the reception sensitivity of the antenna 130 periodically measured as described above falls below a predetermined predetermined reference value in step S206, and maintains the reception sensitivity of the antenna 130 above a predetermined reference value. If it is, the reception of the digital broadcast signal is continued while maintaining the unchanged angle or length of the antenna 130 in step S208.

However, if it is detected in step S206 that the reception sensitivity of the antenna 130 measured periodically decreases below a predetermined reference value, the controller 114 proceeds from step S206 to step S210 to perform the antenna. The driving unit 100 is controlled to change the angle of the antenna 130 or to change the length of the antenna 130 while rotating the antenna 130 up or down according to a preset adjustment direction.

Subsequently, the control unit 114 continuously detects the reception sensitivity of the antenna 130 according to the angle or length change of the antenna 130 through the gain calculation unit 120 in step S212, and in step S214. It is checked whether the reception sensitivity of 130 is equal to or greater than the predetermined reference value.

At this time, if the reception sensitivity of the antenna 130 according to the change in the angle or length of the antenna 130 becomes more than the predetermined reference value, the control unit 114 proceeds from step (S214) to (S216) to the antenna driver 120 ) To stop the operation of changing the antenna angle or length, and to maintain the corresponding antenna angle or length at which the reception sensitivity is greater than or equal to a predetermined reference value, thereby stably receiving the digital broadcast signal.

As described above, in the present invention, in the method of automatically adjusting the antenna reception sensitivity mounted on a digital broadcasting receiver such as a vehicle DMB receiver, the reception sensitivity of the antenna is continuously measured by continuously measuring the antenna reception sensitivity based on the strength of the received digital broadcasting signal. When the reference value falls below the reference value, the antenna sensitivity is automatically adjusted so that the reception sensitivity of the antenna is maintained above a predetermined reference value while changing the angle or length of the antenna so that the broadcast signal can be more stably received in any communication environment.

Meanwhile, in the above description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the invention should be determined by the claims rather than by the described embodiments.

1 is a block diagram of a DMB receiver equipped with an automatic antenna sensitivity adjustment apparatus according to an embodiment of the present invention;

2 is an operation control flowchart for automatically adjusting the reception sensitivity of the antenna according to an embodiment of the present invention.

<Brief description of the major symbols in the drawings>

102: tuner portion 103: base band portion

104: A / V decoder 106: MPEG decoder

108: data decoder 110: graphics processing unit

112: LCD display 114: control unit

116: key input unit 100: antenna driving unit

120: gain calculation unit

Claims (4)

An antenna driver for driving an antenna to change an angle or length of the antenna; A gain calculator which calculates a reception sensitivity according to an angle or length change of the antenna; The gain calculation unit continuously checks whether the antenna reception sensitivity falls below a predetermined reference value, and when the reception sensitivity falls below a reference value, the reception sensitivity of the antenna is automatically changed while controlling the antenna driver to automatically change the angle or length of the antenna. Control unit for controlling to maintain above the reference value Antenna reception sensitivity automatic adjustment device comprising a. The method of claim 1, The gain calculation unit, And receiving sensitivity of the antenna is calculated based on a reception gain of the broadcast reception signal measured according to a change in the angle or length of the antenna. (a) continuously checking whether the reception sensitivity of the antenna falls below a predetermined reference value; (b) changing the angle or length of the antenna when the reception sensitivity of the antenna falls below the reference value; (c) detecting reception sensitivity of the antenna according to the angle or length change; (d) stopping the antenna angle or length change when the reception sensitivity of the antenna rises above the reference value and maintaining the antenna angle or length; Automatic sensitivity adjustment method of the antenna comprising a. The method of claim 3, wherein In the step (c), the reception sensitivity of the antenna, Method for automatically adjusting the reception sensitivity of the antenna, characterized in that calculated based on the reception gain of the broadcast reception signal measured according to the change in the angle or length of the antenna.
KR1020070126803A 2007-12-07 2007-12-07 Apparatus and method for automatically controlling sensitivity of antenna KR20090059768A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020070126803A KR20090059768A (en) 2007-12-07 2007-12-07 Apparatus and method for automatically controlling sensitivity of antenna

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020070126803A KR20090059768A (en) 2007-12-07 2007-12-07 Apparatus and method for automatically controlling sensitivity of antenna

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KR20090059768A true KR20090059768A (en) 2009-06-11

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101880707B1 (en) * 2018-01-22 2018-07-20 이용안 System for controlling direction of directional antenna and method for controlling direction thereof
KR20210141019A (en) * 2020-05-15 2021-11-23 주식회사 연후 Analysis device for multi-lane toll system and method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101880707B1 (en) * 2018-01-22 2018-07-20 이용안 System for controlling direction of directional antenna and method for controlling direction thereof
KR20210141019A (en) * 2020-05-15 2021-11-23 주식회사 연후 Analysis device for multi-lane toll system and method thereof

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