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Serial data associated clock extraction method

A technology of serial data and channel-dependent clock, which is applied in the field of channel-dependent clock extraction of serial data, and can solve the problems of window signal not being too wide, false detection, waste of resources, etc.

Inactive Publication Date: 2012-12-12
WUHAN BINHU ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The disadvantage of the existing implementation technology is that although the extraction of the associated clock is realized, method 1 adds a transmission channel, which leads to an increase in the number of interfaces and the multiple of the PCB wiring area, wasting resources
Method 2 does not require a dedicated channel to send the clock, but the generated window signal must at least cover the received m-sequence, but the window signal cannot be too wide, otherwise it may cause false detection

Method used

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Embodiment Construction

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

[0029] like figure 1 It is a hardware schematic diagram of a method for extracting a channel-associated clock of serial data according to an embodiment of the present invention. The following is figure 1 Instructions for the hardware used in:

[0030] System synchronous clock generator; generate system synchronous clock and distribute it to the sending end and receiving end;

[0031] The sending end includes: a timing unit, a data generating unit, a synchronous frame generator, and a framer;

[0032] The receiving end includes: a timing unit, a frame synchronization search unit, a clock selection unit, and a deframer.

[0033] like figure 2 As shown, the method for extracting the associated clock of the specific serial data includes the following steps:

[0034] 1. The system synchronous clock generator distributes the synchronous clock to the sender and receive...

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Abstract

The invention relates to the field of digital communication, in particular to a serial data associated clock extraction method. The method comprises arranging a synchronous frame signal on the transmitting end for transmitting the serial data to enable a frame synchronous searching unit at the receiving end to work effectively; and generating N clocks identical in frequency but different in phases at the receiving end by using a system synchronous clock as the reference clock, thereby completing effective extraction of the associated clock.

Description

technical field [0001] The invention relates to the field of digital communication, in particular to a method for extracting an associated clock of serial data. Background technique [0002] Generally, there is a system synchronous clock generator in the communication system that distributes the system synchronous clock to the sending end and the receiving end of the serial data transmission, and generates the synchronous clock of the serial data based on the system synchronous clock. The inconsistency of the length, the phase relationship between the distributed system synchronous clock and the serially transmitted data is uncertain. At the receiving end, to operate on the received serial data, there must be a clock synchronous with the serial data (that is, the associated clock). Therefore, extracting the associated clock is a very important subject in the field of serial transmission. [0003] The following introduces the existing technology for extracting the associate...

Claims

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Application Information

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IPC IPC(8): H04L7/027H04L27/26
Inventor 宋慧
Owner WUHAN BINHU ELECTRONICS
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