Time-domain parallel digital demodulation system

A digital demodulation and time-domain technology, applied in the field of digital information transmission, can solve problems such as high technological conditions, inability to meet general demodulation requirements, and huge investment
CN101674050AInactive Publication Date: 2010-03-17TSINGHUA UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
TSINGHUA UNIV
Publication Date
2010-03-17
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a time-domain parallel digital demodulation system, comprising a time-domain parallel sampling rate conversion module, a parallel matched filter module, a parallel clock recovery module, a time-domain parallel carrier recovery module and a differential decoding module, wherein the time-domain parallel sampling rate conversion module is used for converting the sampling rateof a sampling digital signal obtained by a high speed A / D converter, the parallel matched filter module is used for matched filtering the signal after sampling rate conversion, the parallel clock recovery module is used for carrying out timing recovery and re-sampling on the modulating signal after matched filtering, the time-domain parallel carrier recovery module is used for recovering the phasedifference and the frequency difference of the signal output by the parallel clock recovery module, and the differential decoding module is used for differential decoding the signal which is output by the time-domain parallel carrier recovery module and has phase ambiguity. The technical scheme of the invention can realize universal receiving demodulation with variable data rate and low cost, thus completing digital demodulation reaching up to 1200Mbps.
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Description

technical field

[0001] The invention relates to the technical field of digital information transmission, in particular to a digital demodulation system using a time-domain parallel demodulation algorithm, which is applied in the field of high-speed data transmission, such as high-speed remote sensing satellite signal transmission and reception. Background technique

[0002] After entering the 21st century, the rise of aerospace technology and its application in the military has rapidly expanded the battlefield airspace from the atmosphere to outer space, expanded the fields of military activities and national defense security, and changed the form of modern warfare. Remote sensing satellite technology is an important part of it. It refers to the use of various sensors (such as visible light, infrared detection, radar, etc.) to obtain ground information on a space-based satellite platform. An applied science and technology of shape, size, location, properties and their relati...

Claims

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