公开(公告)号：US11476950B2

公开(公告)日：2022-10-18

申请号：US17390473

申请日：2021-07-30

Applicant: Huawei Technologies Co., Ltd. ,  UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA

Inventor： Chen Gong ,  Jinkang Zhu ,  Shangbin Li ,  Rui Ni

IPC: H04B10/00 ,  H04B10/70 ,  H04B10/516 ,  H04J14/00

Abstract: A quantum communication method, an apparatus, and a system are provided. The method includes: modulating a first symbol to an ith direction vector of a first electric wave based on a preset mapping relationship, to obtain a second electric wave; and transmitting the second electric wave, where the first electric wave supports M direction vectors, the ith direction vector of the first electric wave is one of the M direction vectors of the first electric wave, the first symbol is a symbol corresponding to first data, the ith direction vector of the first electric wave corresponds to an ith distribution result, the ith distribution result is obtained by converting the second electric wave into an energy quantum. The first symbol may be modulated to a direction vector of the first electric wave, and this application is compatible with the conventional technology.

公开(公告)号：US11374653B2

公开(公告)日：2022-06-28

申请号：US16645147

申请日：2017-06-07

Applicant: University of Science and Technology of China

Inventor： Shangbin Li ,  Zhengyuan Xu ,  Boyang Huang

IPC: H04B10/116 ,  H05B45/20 ,  H04B10/43 ,  H04B10/50 ,  H04B10/54

Abstract: Provided is a visible light communication transceiver. A drive amplification module performs digital-to-analog conversion and amplification on a digital modulation signal to obtain a first electrical signal, and transmits the signal to a Bias Tee-like circuit. The Bias Tee-like circuit transmits the first electrical signal to a LED light source. The LED light source performs electrical-to-optical conversion on the first electrical signal to generate a first optical signal and transmits the first optical signal, and performs optical-to-electrical conversion on a received second optical signal to obtain a second electrical signal. The Bias Tee-like circuit obtains the second electrical signal from the LED light source, and transmits the second electrical signal to an adaptive amplification and equalization module. The adaptive equalization module adjusts a gain of the second electrical signal based on an optical power of the first optical signal.

公开(公告)号：US20200252128A1

公开(公告)日：2020-08-06

申请号：US16645147

申请日：2017-06-07

Applicant: University of Science and Technology of China

Inventor： Shangbin Li ,  Zhengyuan Xu ,  Boyang Huang

IPC: H04B10/116 ,  H04B10/54 ,  H04B10/43 ,  H04B10/50 ,  H05B45/20

Abstract: Provided is a visible light communication transceiver. A drive amplification module performs digital-to-analog conversion and amplification on a digital modulation signal to obtain a first electrical signal, and transmits the signal to a Bias Tee-like circuit. The Bias Tee-like circuit transmits the first electrical signal to a LED light source. The LED light source performs electrical-to-optical conversion on the first electrical signal to generate a first optical signal and transmits the first optical signal, and performs optical-to-electrical conversion on a received second optical signal to obtain a second electrical signal. The Bias Tee-like circuit obtains the second electrical signal from the LED light source, and transmits the second electrical signal to an adaptive amplification and equalization module. The adaptive equalization module adjusts a gain of the second electrical signal based on an optical power of the first optical signal.