Unlock instant, AI-driven research and patent intelligence for your innovation.

Adaptive equalization device and method based on phase detection

A technology of adaptive equalization and phase detection, applied in automatic power control, electrical components, etc., can solve the problem of high complexity of structural loops, reduce the influence of random jitter and other components, improve stability, and reduce design difficulty Effect

Active Publication Date: 2021-08-24
CHENGDU CORPRO TECH CO LTD
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of this application is to provide an adaptive equalization device and method based on phase detection, which is used to effectively improve the high complexity of structural loops existing in the prior art technical flaws

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Adaptive equalization device and method based on phase detection
  • Adaptive equalization device and method based on phase detection
  • Adaptive equalization device and method based on phase detection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The equalizer is the main means to deal with the intersymbol interference caused by multipath fading and channel passband unevenness in the frequency domain. In satellite communication, wired transmission and network communication, due to the good channel conditions, the degree of interference Low, the main role of the equalizer is channel matching and compensation; while in ground wireless transmission, signal transmission is greatly affected by terrain and multipath effects, and the equalizer can also reduce the intersymbol interference caused by multipath.

[0034] see figure 1 , in the prior art, the adaptive equalizer is implemented based on energy comparison. The input signal is amplified by the equalizer to obtain the output signal of the equalizer after the high-frequency signal is amplified, and then the output signal of the square wave is converted into a square wave output signal through the cutter. By comparing the energy of the equalizer output and the outp...

Embodiment 2

[0046] see Figure 8 , as a possible implementation manner, on the basis of the structure of Embodiment 1, the adaptive equalization device based on phase detection further includes: a hysteresis circuit, which is used to filter random jitter caused by noise and periodic jitter caused by interference; The input end of the hysteresis circuit is connected with the output end of the phase detector, and the output end of the hysteresis circuit is connected with the input end of the integrating circuit.

[0047] see Figure 9 , the embodiment of the present application provides a working sequence diagram of the hysteresis module. During the transmission of signals in the channel, some noise will be generated. These noises are usually due to high edge rate reflections of logic level transitions. Digital devices produce false level transition detections, while hysteresis blocks, by their nature, can filter out some of the high frequency noise. The hysteresis module sets a preset t...

Embodiment 3

[0049] see Figure 10 , as a possible implementation, on the basis of the structure of embodiment 2, the adaptive equalization device based on phase detection further includes: a sampling module, which is used to retime the equalized signal output by the output end of the equalizer, and the sampling module The first input end of the sampling module is connected to the output end of the equalizer, the second input end of the sampling module is connected to the output end of the clock recovery circuit, and the output end of the sampling module outputs a composite signal of the equalization signal and the retiming signal. The equalized signal output by the equalizer is retimed using the sampling module, which can further reduce the random jitter in the output signal.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides an adaptive equalization device and method based on phase detection. The adaptive equalization device comprises an equalizer, a comparator, a clock recovery circuit, a phase discriminator, an integrating circuit and a gain control circuit, wherein the first input end of the equalizer is connected with an input signal; the output end of the equalizer is connected with the input end of the comparator; the output end of the comparator is connected with the input end of the clock recovery circuit; the output end of the clock recovery circuit is connected with the first input end of the phase discriminator; the second input end of the phase discriminator is connected with the output end of the comparator; the output end of the phase discriminator is connected with the input end of the integrating circuit; the output end of the integrating circuit is connected with the input end of the gain control circuit; and the output end of the gain control circuit is connected with the second input end of the equalizer. The system design difficulty is reduced.

Description

technical field [0001] The present application relates to the technical field of integrated circuits, and in particular, to an adaptive equalization device and method based on phase detection. Background technique [0002] For a channel with limited bandwidth, Inter-Symbol Interference (ISI) is the main factor limiting the data rate. ISI refers to the influence of the previously received data on the current data amplitude and pulse width due to the limited bandwidth of the signal. When this interference is large enough to cause identification errors in the front-end circuit of the receiver, ISI will significantly affect the system error. code rate. Since the cable channel is usually modeled as a low-pass filter, it is necessary to use an equalizer with some high-frequency gain to compensate for ISI; and since the channel is uncertain and changes with time or the environment, in order to be able to continuously track Due to the characteristics of the channel, the receiver e...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H03L7/087H03L7/097
CPCH03L7/087H03L7/097
Inventor 梁冰陈雁苟冠鹏
Owner CHENGDU CORPRO TECH CO LTD