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Physical layer carrier synchronization system and method in data communication system

A data communication system and carrier synchronization technology, which is applied in digital transmission systems, transmission systems, modulated carrier systems, etc., can solve problems such as occupying internal memory resources and increasing system logic complexity, and achieve the effect of solving logic complexity

Active Publication Date: 2010-09-29
HYTERA COMM CORP
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a physical layer carrier synchronization system and method of a data communication system to solve the problem of increasing the logical complexity of the system or occupying a large amount of internal memory resources in the existing link frame synchronization method

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  • Physical layer carrier synchronization system and method in data communication system
  • Physical layer carrier synchronization system and method in data communication system
  • Physical layer carrier synchronization system and method in data communication system

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Embodiment Construction

[0025] see figure 1 , The physical layer carrier synchronization system of the data communication system of the present invention includes a synchronization function module, a frequency generator and a mixer. The frequency generator converts the three frequency points generated by the synchronization function module into local vibration frequency points and transmits them to the mixer. The function module performs carrier synchronization processing.

[0026] The synchronization function module includes a timing control module, a single frequency point generation module, a complex multiplication module, an accumulation and averaging module, a comparison and selection module, a carrier control parameter generation module, a carrier control parameter gain module and a multiplier. The timing control module is connected with the carrier control parameter generation module to ensure that the periods generated by the three frequency points are the same, and to generate the start mom...

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Abstract

The invention discloses a system for synchronizing a carrier of a physical layer in a data communication system and a method thereof; the method comprises the following steps: a, at least 2 local oscillator frequency points are generated in a certain time; b, the generated at least 2 local oscillator frequency points are carried out frequency mixing with a signal externally inputted to be synchronized; c, the at least 2 local oscillator frequency points are carried out carrier synchronization processing, one frequency point is selected as a fundamental frequency; at least 2 frequency points are generated again based on the fundamental frequency; the step a is returned to. The method for synchronizing the carrier of the physical layer in the data communication system comprises the steps: after the frequency mixing signal transmitted by a frequency mixer, the frequency mixing signal is processed to generate at least 2 frequency points; one frequency point of the at least 2 frequency points is selected to be the fundamental frequency to generate new at least 2 frequency points again; the carrier synchronization is realized, which solves the problem of the logical complexity of the system increased by the current carrier synchronization method or occupation of large resource of an internal memory.

Description

【Technical field】 [0001] The invention relates to a data communication system, in particular to a physical layer carrier synchronization system and method of the data communication system. 【Background technique】 [0002] The DMR (Digital Mobile Radio) wireless communication standard is a digital trunking standard newly released by the European Communications Standards Association. At present, there is no corresponding product in China. [0003] For any kind of wireless communication products, the realization of carrier synchronization has always been a key difficulty, and the same is true for DMR products, especially the regulations on certain parameters in the standard, which make the research and development more difficult. [0004] The purpose of carrier synchronization is to eliminate the phase difference between the carrier of the received signal and the carrier generated by the local oscillator, mainly through various algorithms to eliminate the modulation information ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/00
Inventor 马超
Owner HYTERA COMM CORP