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Error correction method and apparatus for data transmission system

An error correction, high-speed data transmission technology, applied in the field of jitter spectrum correction, which can solve problems such as data decision errors, task difficulties, and inter-symbol interference.

Inactive Publication Date: 2009-08-05
INTEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And jitter makes this task very difficult
Third, in long-distance transmission systems with multiple regenerators on the link, jitter will accumulate
If the phase error causes the data decision to occur before time T1 or after time T3, then the data decision may be wrong
In this case, the receiver starts to generate errors due to intersymbol interference

Method used

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  • Error correction method and apparatus for data transmission system
  • Error correction method and apparatus for data transmission system
  • Error correction method and apparatus for data transmission system

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Embodiment Construction

[0038] figure 2 A time-domain eye diagram is shown when the phase error exceeds 40% according to an embodiment of the present invention. Point 1 02 is the point where the sign error occurs when the data transitions from -1 to 1; point 2 04 is the point where the sign error occurs when the data changes from 1 to -1; both points 1 02 and 2 04 can be identified Its phase is offset from T2 by approximately 40% of the symbol period (to the left of the central phase in this example). For example, when the data decision moment should be at T2 (t=1.0) and thus coded as a+1 but is instead judged at T1 (t=0.6), the data is coded as a0 because its magnitude is below 0.5 at T1 , resulting in an error event. Point 2 04 has the same phase as the signal at point 1 02 but opposite polarity.

[0039] exist figure 2 Another example of error events that the present invention can overcome can be seen in . When the data changes from 1 to -1, point 3 06 is where the sign error occurs; and wh...

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Abstract

A receiver includes a decision circuit. This circuit calculates the value of an input signal and holds that value as a temporary value. The decision system calculates an error value, amplifies the error value, and holds the amplified error value as a correction value. If the amplified error value is within tolerance and the input signal is in a transition from positive to negative state or from negative to positive state, then the decision system replaces the temporary value with the corrected value .

Description

technical field [0001] The present invention generally relates to high speed data transmission. More specifically, the present invention relates to correcting jitter spectra in transmission systems that require tight jitter tolerances over a wide range of jitter frequencies. For example, the input signal of a point-to-point dedicated 1.544Mbit / s digital circuit (T1) system may have large jitter due to the cascading of several T1 links in the network. Background technique [0002] Networking applications have become very common in recent years, especially in response to the explosion of network applications and network diversity used in large-array computing environments. Accordingly, many advances have been made in the related art to improve the performance of these network systems. For example, fully integrated transceivers for T1 network channel service units (CSUs) and integrated services digital network (ISDN) primary rate interface applications are well known in the a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/06H04L7/033H04L7/02
CPCH04L7/0334H04L25/06H04L7/0062
Inventor 广司高取詹姆斯·利特尔斯科特·基乌
Owner INTEL CORP