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A multi-rate demodulation device based on sampling point selection

A demodulation device and multi-rate technology, applied in the field of spaceborne communication, can solve problems such as limiting the application of spaceborne equipment, and achieve the effects of stable and reliable performance, simple interface protocol and small size

Active Publication Date: 2021-04-02
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the case of limited on-board resources, these shortcomings limit its application on on-board equipment

Method used

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  • A multi-rate demodulation device based on sampling point selection
  • A multi-rate demodulation device based on sampling point selection
  • A multi-rate demodulation device based on sampling point selection

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Embodiment Construction

[0028]The present invention will be further described in connection with the accompanying drawings and specific embodiments.

[0029]Referfigure 1 A multi-rate demodulation device selected based on the sampling point, which includes orthogonating the inverter 1, the multi-rate extraction filter 2, the optimum point selection device 3, and the carrier phase tracker 4, decoder 5 and Frame processor 6.figure 1 It is an example electrical schematic diagram of a low resource based on a sampling point selected from a small satellite platform, and an embodiment according to an embodiment.figure 1 Connect the line.

[0030]In this apparatus, orthogonating the inverter 1 performs the digital intermediate frequency signal after the ADC samples, obtains a digital baseband signal, and feeds the digital baseband signal into the multi-rate extraction filter 2; Multi-rate extraction filter 2 pair The input digital baseband signal performs a filtering process, which uses the CIC to extract filter and mat...

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PUM

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Abstract

The invention discloses a multi-rate demodulating device based on sampling point selection, and belongs to the technical field of satellite-borne communication. The device comprises an orthogonal down-converter, a multi-rate extraction filter, an optimal sample point selector, a carrier phase tracker, a decoder and a framing processor. According to the device, timing recovery is realized by adjusting data output of the extraction filter and selecting an optimal sampling point; and the device has the advantages of simple processing implementation, low resource occupation, multi-rate support andthe like, and is particularly suitable to be used as a medium-low-speed multi-rate signal demodulating device which is limited in inter-satellite or satellite-ground resources.

Description

Technical field[0001]The present invention relates to the field of star-loaded communication technologies, in particular to a multi-rate demodulation device selected based on sample points.Background technique[0002]The conventional signal demodulator is mostly to realize timing recovery processing of digital signals by adjusting the AD sampling clock or using an interpolated processor. Adjusting the AD sampling clock requires an increase in the star-load device DDS, and the interpolation processor needs to take up more FPGA hardware resources. In the case of resource restrictions on the star, these disadvantages limit their applications on the on-based equipment.Inventive content[0003]SUMMARY OF THE INVENTION It is an object of the present invention to prevent the deficiencies in the above background techniques to provide a multi-rate demodulation device selected based on sampling points, which takes up low resources, suitable for solving low-speed multi-rate signals in construction...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L7/027H04L7/00H04L27/00H03H17/06H04L1/00
CPCH03H17/0671H04L1/0054H04L7/0016H04L7/0272H04L27/0014H04L2027/0026
Inventor 尹曼张鸣芸宋艳军李想李亚伟王薇王立民
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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