Equalizer for high-speed serial interface and method for realizing blind equalization and self-adaptation

Abstract

The equalizer for the high-speed serial interface disclosed by the invention includes a high-speed comparison module, a sample-and-hold module, a rate conversion module, an adaptive feedback module and a summation module; the invention also discloses a method for realizing blind equalization self-adaptation of the equalizer , using the high-speed comparison module to realize the sign judgment of the amplitude by inputting the result of the adaptive feedback module and the high-speed signal, storing the data through the sample and hold module, and the speed conversion module will be used for low-speed conversion of the high-speed output result, And transmit the output result to the adaptive feedback module, the adaptive feedback module performs adaptive output adjustment coefficient, and outputs the result to the high-speed comparison module through the summation module, so as to realize blind equalization and self-adaptation of high-speed serial data. The equalizer disclosed by the invention adopts a loop expansion half-rate summation, and the coefficients are obtained by updating the self-tracking coefficients; the summation module is located in the feedback path, does not need data addition and subtraction operations, and speeds up information processing.

Description

technical field [0001] The invention belongs to the technical field of data transmission, specifically relates to an equalizer used for a high-speed serial interface, and also relates to a method for realizing blind equalization and self-adaptation of the equalizer used for a high-speed serial interface. Background technique [0002] In the field of high-speed signal transmission, issues such as signal integrity, on-chip interconnection, and high-speed packaging have become increasingly prominent. For example, the size reduction of metal interconnection and synchronous chip encounters bottlenecks, the bandwidth of interconnection wires cannot meet the needs of high-speed signal transmission, and the interconnection channel exhibits time-varying characteristics due to the influence of the environment. In backplane communication, when the single-channel signal transmission rate is higher than 10Gb / s, the eye diagram of the signal at the receiving end is very difficult. The ma...

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Problems solved by technology

[0005] The purpose of the present invention is to provide an equalizer for high-speed serial interface, which has strong structural robustness and outstanding real-time calibration ability, solves the problem of amplitude attenuation of existing high-speed channels, and can achieve Time-varying characteristics of the channel for real-time correction

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