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Frequency spectrum inversion judging device and frequency spectrum inversion judging method

A technology of spectrum inversion and judgment device, which is applied in the direction of TV, electrical components, image communication, etc., can solve the problem of delaying the boot time of TV system

Active Publication Date: 2013-12-25
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen that the problem of spectrum inversion will seriously delay the start-up time of the TV system

Method used

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  • Frequency spectrum inversion judging device and frequency spectrum inversion judging method
  • Frequency spectrum inversion judging device and frequency spectrum inversion judging method
  • Frequency spectrum inversion judging device and frequency spectrum inversion judging method

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Embodiment Construction

[0016] According to an embodiment of the present invention is figure 1 The spectrum inversion judging device 100 shown includes a differential correlator (differential correlator) 12 and a judging module 14 . In practical applications, the spectrum inversion judging device 100 can be integrated in a digital TV signal receiving terminal adopting the DVB-S2 standard, but not limited thereto.

[0017] According to the DVB-S2 specification, the start of the data frame (startofframe, referred to as SOF) contains a total of 26 symbols (symbol) S 0 ~S 25 , where S 0 , S 2 , S 4 ,...,S 24 The in-phase and quadrature components of each of the 13 symbols have the same size and the same positive and negative; moreover, S 1 , S 3 , S 5 ,...,S 25 Etc. The in-phase components and quadrature components of the other 13 symbols have the same size and opposite positive and negative. If these symbols are marked in the complex number plane, S 0 , S 2 , S 4 ,...,S 24 and other symbol...

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Abstract

The invention provides a frequency spectrum inversion judging device which comprises a differential motion correlator and a judging module. The differential motion correlator is used for applying odd-order differential motion correlation operation on an input signal and a known signal so as to generate a differential motion relevant result. When the input signal is judged as a target signal corresponding to the known signal, the judging module judges whether frequency spectrum inversion exists in the input signal according to the phase of the differential motion relevant result.

Description

technical field [0001] The present invention is related to the wireless communication technology, and especially related to the technology of judging whether the wireless communication signal has a spectrum inversion (spectrum version) condition. Background technique [0002] With the advancement of communication technology, the development of digital TV broadcasting is becoming more and more mature. In addition to transmission via cable lines, digital TV signals can also be transmitted in the form of wireless signals through equipment such as base stations or artificial satellites. Both the first generation digital video broadcasting-satellite (DVB-S for short) specification and the second generation digital video satellite broadcasting specification (DVB-S2) are currently widely used standards in this field. [0003] In the DVB-S2 specification, the input signal received by the baseband demodulator at the receiving end of the digital TV signal is a π / 2-shifted binary phas...

Claims

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Application Information

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IPC IPC(8): H04N17/00
Inventor 郑凯文廖懿颖林东昇童泰来
Owner MEDIATEK INC
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