Frame synchronizing method in digital communication

A digital communication and frame synchronization technology, applied in the direction of synchronization signal speed/phase control, etc., can solve the problems of unsatisfactory cost and effect, and achieve the effect of simple implementation, improved synchronization accuracy and low cost

Inactive Publication Date: 2009-12-16
SHENZHEN POLYTECHNIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are also some special technologies for frame synchronization, such as phase-locked loop technology, etc. This technology is mainly focused on adjusting the clock itself on the circuit, which is unsatisfactory in terms of cost and effect.

Method used

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  • Frame synchronizing method in digital communication
  • Frame synchronizing method in digital communication

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Embodiment Construction

[0034] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0035] In the frame synchronization method in this digital communication of the present invention, a frame adjustment buffer is added to the data frame; after the receiving end receives and demodulates the data, it judges whether the frame is misaligned, and if so, shifts it within the range of the adjustment buffer. Bit, and find the first bit position of the received data frame, and obtain the data frame data from this position, so as to ensure that the obtained data frame data can be the same as the sent data frame, that is, the received data frame is synchronized with the sent data frame.

[0036] Examples are given below for detailed description.

[0037] see figure 1 , figure 1 It is a schematic diagram of the wireless data transceiver system. ...

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PUM

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Abstract

The invention discloses a frame synchronization method in digital communication. In the method, a synchronization adjustment buffer is added in a data frame, and the receiving end stores data frame header data and synchronization adjustment buffer data; the synchronization process includes: A. The receiving end sends a data frame signal containing a synchronous adjustment buffer; B. The receiving end receives the data frame signal, samples the data frame signal and demodulates it into digital data; C. The receiving end uses the stored data frame header data and the recorded The position of the first bit of the data frame, judge whether the received data frame has data misalignment, if so, move the data bit within the range of the number of bits in the synchronous adjustment buffer, determine the position of the first bit of the received data frame and record it, execute Step D; otherwise, directly execute step D; D, the receiving end obtains the data of the data frame from the position of the first bit of the recorded data frame. The application of the invention can improve the synchronization precision, and is simple to realize and low in cost.

Description

technical field [0001] The invention relates to a data frame transmission technology in digital communication, in particular to a frame synchronization method in digital communication. Background technique [0002] In a digital communication system, whether it is wired digital communication or wireless digital communication, after the data frame is transmitted from the sending end to the receiving end, the receiving end must be able to correctly judge the frame header and frame end of the data frame, otherwise, it will cause data Receive failed. The technology that ensures that the receiving end correctly determines the data frame header and frame tail of the received data frame, and can correct it in time when the frame synchronization deviates, is the frame synchronization technology. [0003] In the process of data frame communication transmission, there are many factors that lead to the deviation of data frame synchronization, mainly including: a certain jitter or insta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L7/10
Inventor 王根平文励洪
Owner SHENZHEN POLYTECHNIC
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