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Coarse frequency offset estimation method and frequency offset estimation device using the same

A technology of coarse frequency deviation and frequency deviation, which is applied in the field of frequency deviation estimation devices, and can solve problems such as being unable to directly use DVB-S2

Active Publication Date: 2019-05-14
ALI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In other words, the frequency deviation estimation method of DVB-S2 cannot be directly used in DVB-S2X when the modulation method is unknown.

Method used

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  • Coarse frequency offset estimation method and frequency offset estimation device using the same
  • Coarse frequency offset estimation method and frequency offset estimation device using the same
  • Coarse frequency offset estimation method and frequency offset estimation device using the same

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Embodiment Construction

[0016] Various exemplary embodiments will be described more fully hereinafter with reference to the accompanying drawings, in which some exemplary embodiments are shown. However, inventive concepts may be embodied in many different forms and should not be construed as limited to the illustrative embodiments set forth herein. Rather, these exemplary embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the inventive concept to those skilled in the art. In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity. Like numbers indicate like components throughout.

[0017] It should be understood that although the terms first, second, third, etc. may be used herein to describe various components or signals etc., these components or signals should not be limited by these terms. These terms are used to distinguish one component from another component, or one signal from another signa...

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Abstract

The embodiment of the invention provides a coarse frequency deviation estimation method and a frequency deviation estimation device using the same. The coarse frequency deviation estimation method includes the following steps that: a k-th frame is received, wherein the k-th frame includes a first frame header and a second frame header, wherein the second frame header has a first N-row*M-column symbol matrix, and the modulation mode of the k-th frame determines a Walsh-Adama sequence associated with the first symbol matrix; all symbols in each row of the first symbol matrix are mapped to the same quadrant, so that a second N-row*M-column symbol matrix can be generated; autocorrecting computing is performed on all symbols in each row of the second symbol matrix, so that a first row of autocorrelation vectors to the N-th row of autocorrelation vectors which are corresponding to the first row to the N-th row respectively can be obtained; and coarse frequency deviation can be calculated out according to the first row of autocorrelation vectors to the N-th row of autocorrelation vectors.

Description

technical field [0001] The present invention relates to a coarse frequency offset estimation method, and in particular to a coarse frequency offset estimation method applicable to any frame structure and a frequency offset estimation device using the same. Background technique [0002] DVB-S2X is a new generation satellite digital TV broadcast transmission standard proposed by the European Telecommunications Standards Institute (ETSI). In this regard, compared with the basic standard of the previous generation DVB-S2, the extended second-generation digital satellite broadcasting (Extension of DVB-S2Satellite Digital Broadcasting Standard, DVB-S2X) is suitable for very low signal-to-noise ratio (Very Low Signal Noise Ratio , VL-SNR) for signal transmission, in which the ultra-low signal-to-noise ratio is about -10dB. [0003] DVB-S2X adopts higher-order PSK modulation, up to 256APSK, which improves the spectrum utilization rate of DVB-S2X. In order to transmit signals under...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/02
Inventor 徐子龙
Owner ALI CORP