DVB-S receiver and method for displaying quality and intensity index signals

A technology of satellite receiver and digital image, which is applied in the direction of image communication, TV, color TV parts, etc., and can solve the problems of not being able to provide signal quality information and not being able to accurately lock the signal

Inactive Publication Date: 2009-05-27
ALI SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the strength of the received RF signal is lower than a threshold value, the TR/CR unit 16 cannot ac

Method used

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  • DVB-S receiver and method for displaying quality and intensity index signals
  • DVB-S receiver and method for displaying quality and intensity index signals
  • DVB-S receiver and method for displaying quality and intensity index signals

Examples

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Embodiment Construction

[0027] FIG. 2 is a schematic structural diagram of an embodiment of a digital video broadcasting satellite receiver capable of displaying the quality and strength of a received radio frequency signal according to the present invention. The digital video playback satellite receiver includes a tuner 21, an analog-to-digital converter 22a, 22b, a DC current canceller 23, a demodulator 24, an automatic gain control unit 25, a Fourier transform unit 26, and a computing unit 27 and a display unit 28. The tuner 21 is used to receive a radio frequency signal, down-convert the radio frequency signal, and transmit the converted radio frequency signal to the analog-to-digital converters 22a and 22b. The analog-to-digital converters 22 a and 22 b sample the RF signal from the tuner and send the sampled signal to the DC current canceller 23 . A direct current canceller (direct current canceller, DCC) 23 receives signals from the analog-to-digital converters 22a and 22b and eliminates the ...

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PUM

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Abstract

The present invention relates to a digital video-broadcasting satellite receiver, a quality and intensity instruction signal display method, the digital video-broadcasting satellite receiver includes a demodulator for receiving and down converting radio-frequency signal. An analog-digital converter samples the radio-frequency signal from the demodulator and converts the same into digital signal. A DC/AC eliminator receives the digital signal and eliminates the DC section of the digital signal, and generates a RXI signal and a RXQ signal. An automatic gain control unit receives the digital signal, generates and sends a control signal to the demodulator. A Fourier transformation unit for execute a Fast Fourier transformation to the RXI signal and the RXQ signal. A demodulator receives the RXI signal and the RXQ signal and generates a transport flow, where an intensity display signal of the received radio frequency signal is determined on the basis of the signal from the control unit, a quality display signal of the radio frequency signal is determined on the basis of signal from the transformation unit.

Description

technical field [0001] The invention relates to a digital video broadcasting satellite receiver, in particular to a digital video broadcasting satellite receiver capable of displaying the quality and strength of received radio frequency signals. Background technique [0002] Generally speaking, when a Digital Video Broadcasting-Satellite receiver (DVB-S receiver) is installed and tested, a test device is usually used to determine the signal received by the Digital Video Broadcasting-Satellite receiver. Signal quality and strength. So that the user can monitor the receiving status of the digital image broadcasting satellite receiver according to the quality and strength of the received signal. In order to obtain a stronger radio frequency (RF) signal, the direction and angle of the antenna of the digital video playback satellite receiver are very important, so the digital video will be adjusted according to the received signal quality and strength signal obtained by the test...

Claims

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Application Information

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IPC IPC(8): H04N5/44H04N5/455H04N5/50H04N5/52H04N7/20H04N5/445
CPCH04N21/488H04N17/004H04N17/04H04N21/4382H04N21/485H04N5/4401H04N5/445H04N21/6143H04N21/426
Inventor 李建新徐斌
Owner ALI SHANGHAI
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