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Loop gain calibration apparatus and method

A technology of loop gain and correction device, applied in the direction of synchronization device, synchronization error correction, automatic power control, etc., can solve the problem of low stability of timing recovery loop, and achieve the effect of accurate tuning

Inactive Publication Date: 2015-12-02
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a smaller phase supplement for the timing recovery circuit may result in lower stability of the timing recovery loop

Method used

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  • Loop gain calibration apparatus and method
  • Loop gain calibration apparatus and method
  • Loop gain calibration apparatus and method

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Embodiment Construction

[0061] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0062] Certain terms are used in the description and claims of this application to refer to particular components. Those skilled in the art should understand that although hardware manufacturers may use different terms to refer to the same component, this specification and claims do not distinguish components by differences in names, but by differences in functions of components. criteria for distinction. The terms "comprising", "comprising" and other similar terms mentioned throughout the specification and claims are all open-ended terms, so they should be interpreted ...

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Abstract

A loop gain calibration apparatus has an exciting signal generator, an exciting signal extracting circuit, and a loop gain control circuit. The exciting signal generator generates a first exciting signal and injects the first exciting signal into a timing recovery loop while the timing recovery loop is operating in response to a reception signal received under a normal reception mode. The exciting signal extracting circuit extracts a second exciting signal from the timing recovery loop after the first exciting signal is injected into the timing recovery loop. The loop gain control circuit receives the first exciting signal from the exciting signal generator, receives the second exciting signal from the exciting signal extracting circuit, and controls a loop gain of the timing recovery loop according to the first exciting signal and the second exciting signal.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of timing recovery, and in particular, to a loop gain correction device for controlling a timing recovery loop and a related loop gain correction method. Background technique [0002] Communication systems increasingly rely on digital data transmission. In turn, digital data transmission relies on reliable reception of transmitted data. Basically, the signal received by the receiver needs to be synchronized with the signal sent by the transmitter to eliminate frequency and / or phase errors generated in the transmission channel between the transmitter and receiver. In general, efficient timing recovery can be used to facilitate reliable reception of transmitted data in the receiving end. More specifically, efficient timing recovery facilitates sampling instances of the received data stream at the correct sampling timing phase. [0003] For example, the timing control loop is implemente...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L7/033
CPCH04L7/0004H04L7/0025H03L7/0807H03L7/081H03L7/091H04L7/0062H04L7/002
Inventor 吴国铭马清祥王淑贤黄崇荣高国浩吴茂霖
Owner MEDIATEK INC