Multi-rate demodulating 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 circuit and low cost

Active Publication Date: 2019-03-19
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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  • Multi-rate demodulating device based on sampling point selection
  • Multi-rate demodulating device based on sampling point selection
  • Multi-rate demodulating device based on sampling point selection

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Embodiment Construction

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

[0029] refer to figure 1 , a multi-rate demodulation device based on sampling point selection, which includes a quadrature down-converter 1, a multi-rate decimation filter 2, an optimal sample point selector 3 and a carrier phase tracker 4, a decoder 5 and a frame processor6. figure 1 It is the electrical schematic diagram of the embodiment of the low-resource-occupancy multi-rate demodulation device based on the selection of sampling points applicable to the small satellite platform of the present invention, and the embodiment is according to figure 1 Connect the lines.

[0030] In this device, the quadrature down-converter 1 performs quadrature down-conversion on the digital intermediate frequency signal sampled by the ADC to obtain a digital baseband signal, and sends the digital baseband signal to the multi-rate decimation filte...

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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 invention relates to the technical field of satellite-borne communication, in particular to a multi-rate demodulation device based on sampling point selection. Background technique [0002] Most traditional signal demodulators realize the timing recovery processing of digital signals by adjusting the AD sampling clock or using an interpolation processor. The method of adjusting the AD sampling clock needs to increase the on-board device DDS, and the way of the interpolation processor needs to occupy more FPGA hardware resources. In the case of limited resources on the planet, these shortcomings limit its application on spaceborne equipment. Contents of the invention [0003] The purpose of the present invention is to avoid the disadvantages of the above-mentioned background technology and provide a multi-rate demodulation device based on sampling point selection, which occupies low resources and is suitable for the solution of low-speed and mult...

Claims

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Application Information

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Patent Type & Authority Applications(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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