Synchronous generation method and device for carrier in ground digital television system

A terrestrial digital TV, carrier synchronization technology, applied in the field of digital information transmission, can solve the problems of long frequency correction time, poor reception reliability, etc., achieve high signal-to-noise ratio, improve accuracy, and achieve simple effects
CN101110901AInactive Publication Date: 2008-01-23BEIHANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIHANG UNIV
Publication Date
2008-01-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention discloses a carrier wave synchronization method and the equipment for a digital television ground broadcast transmission system receiver, which belongs to the digital information processing field. The present invention is characterized in that: first of all, after the frame synchronization, the receiving terminal locally creates a PN serial which is accordant with the receiving frame head, the frequency can be estimated according to the relative results of the fore and after sub serial of the flame head, and the frequency offset signal can be compensated by passing through the loop circuit filtering. The carrier wave synchronization proposal of the present invention is suitable for the flame structures of two modes, the single carrier wave and the multi carrier wave, and at the same time the proposal has the advantages that the synchronizing speed is quick, the anti-noise performance is good, and the present invention suitable for hardware realization.
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Description

technical field

[0001] The invention belongs to the field of digital information transmission, and in particular relates to a carrier synchronization method in a terrestrial digital television system. Background technique

[0002] The development of the TV industry and business has always been centered around the improvement of viewing quality and service capabilities. As a new generation of TV technology, digital TV has greatly improved its viewing quality; at the same time, the adoption of digital technology has created more opportunities for other services. Expansion capacity. The development of digital TV will be of great significance to the development of the entire electronic information industry.

[0003] The terrestrial digital TV broadcasting system is an important part of the broadcasting TV system. It cooperates with satellite digital TV broadcasting system, cable digital TV broadcasting system and other auxiliary systems to provide comprehensive audience covera...

Claims

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