基于CSPI传输协议的自适应均衡器设计

赵斌; 张裕桦; 王照; 徐枫程

doi:10.37188/CJLCD.2020-0147

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基于CSPI传输协议的自适应均衡器设计

器件驱动与控制 | 更新时间：2021-02-07

- 基于CSPI传输协议的自适应均衡器设计
- Adaptive equalizer design based on CSPI protocol
- 液晶与显示 2021年36卷第2期页码：279-286
- 作者机构：
  
  1.华南理工大学电子与信息学院, 广东广州 510640
  2.TCL华星光电技术有限公司, 广东深圳 518107
- 作者简介：
  
  [ "赵斌(1978-), 男, 内蒙古乌海人, 博士研究生, 高级工程师, 2003年于燕山大学获得硕士学位, 主要研究方向为图像处理、高速信号处理。E-mail:csotzhaobin@tcl.com" ]
  [ "徐枫程(1987-), 男, 湖南衡阳人, 学士, 2010年于湘潭大学获得学士学位, 主要从事TFT-LCD液晶行业产品电路设计及驱动研究。E-mail:xufengcheng@tcl.com" ]
- 基金信息：
- DOI：10.37188/CJLCD.2020-0147
  中图分类号： TN919
- 收稿日期：2020-06-11，
  
  修回日期：2020-09-06，
  
  录用日期：2020-9-6，
  
  纸质出版日期：2021-02
- 稿件说明：
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赵斌, 张裕桦, 王照, 等. 基于CSPI传输协议的自适应均衡器设计[J]. 液晶与显示, 2021,36(2):279-286.

Bin ZHAO, Yu-hua ZHANG, Zhao WANG, et al. Adaptive equalizer design based on CSPI protocol[J]. Chinese journal of liquid crystals and displays, 2021, 36(2): 279-286.
赵斌, 张裕桦, 王照, 等. 基于CSPI传输协议的自适应均衡器设计[J]. 液晶与显示, 2021,36(2):279-286. DOI： 10.37188/CJLCD.2020-0147.

Bin ZHAO, Yu-hua ZHANG, Zhao WANG, et al. Adaptive equalizer design based on CSPI protocol[J]. Chinese journal of liquid crystals and displays, 2021, 36(2): 279-286. DOI： 10.37188/CJLCD.2020-0147.

摘要

为了解决高速传输速率下信号在信道传输中遇到的衰减问题，本文介绍一种工作在1.5 GHz下，使用误差反馈的Rx（Receiver）端自适应均衡器设计。为缩短收敛时间，应用了基于离散信号处理的均衡器。二进制随机序列（PRBS）作为训练数据，首先进入均衡滤波器以获得高频增益补偿，然后在采样分割单元被采样并获得陡峭的上升下降特性，最后进入到比较器中。与传统比较器原理不同，该比较器具有内部寄存器用来存储输入信号，将其与期望值比较返回误差。误差通过反馈回路对增益系数进行提升，不断迭代获得可用增益值，从这些可用值中取中位数作为最优增益。若无法找到合适增益值，将向发送器Tx（Transmitter）传输信号增加预加重增益，然后接收器Rx再次进行自适应迭代。最后，向Tx反馈增益系数。增益补偿范围为1~16 dB。该设计在使用CSPI协议的165.1 cm（65 in）8 K机种上实验，在Tx读取的反馈值证实了设计的有效性。满足在高传输速率下，Rx能够不失真地接收并还原CSPI协议数据。

Abstract

In order to solve the signal attenuation through channel at high data rate

a 1.5 GHz adaptive equalizer using error feedback at Rx(Receiver) is introduced. An equalizer based on discrete signal process is applied to reduce convergence time. Firstly

PRBS used as the training data will be transported to the equalizer filter for high frequency compensation. Then it is sampled and sliced by the S/H circuit and slicer to obtain steep rising and falling characteristics. Finally

it is sent to a comparator which is different with conventional comparator. There is an internal register in proposed comparator to store input signal. Error between input and desired value will be fed back through the closed loop to increase equalizer boosting gain. After several times iteration

useable gains are acquired and the median is selected as the optimal gain. If no suitable gain is found

Tx(Transmitter) will increase pre-emphasis setting and adaptive iteration progress at Rx repeats. Finally

the setting gain will be sent to inform Tx. The compensation range is from 1 to 16 dB. An experiment at 165.1 cm(65 in) 8 K module using CSPI protocol is carried out

where the validity of the proposed design is verified by feedback setting at Tx. The requirement that CSPI protocol data could be received and recovered without distortion by Rx at high data rate is met.

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Keywords

references

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