公开(公告)号：US20190326997A1

公开(公告)日：2019-10-24

申请号：US16069844

申请日：2016-11-28

Applicant: KOOKMIN UNIVERSITY INDUSTRY ACADEMY COOPERATION FOUNDATION

Inventor： Yeong Min JANG ,  Van Trang NGUYEN ,  Chang Hyun HONG

IPC: H04B10/556 ,  H04B10/116

Abstract: A DSM-PSK optical wireless transmission method includes the steps of: receiving a binary data signal, allowing a modulator to convert the binary data signal into a global phase shift signal, generating a reference signal group including M number of pulse signals having the same period, the same duty ratio of d/M, mutually different phases, and a determined sequence, generating a data signal group including M number of pulse signals having a determined sequence, the pulse signals having been obtained by phase-shifting the reference signal group according to the global phase shift signal, flickering each light source of a reference light source group including M number of light sources having a determined sequence, according to each pulse signal of the reference signal group, and flickering each light source of a data light source group including M number of light sources having a determined sequence, according to each pulse signal of the data signal group.

公开(公告)号：US20200252131A1

公开(公告)日：2020-08-06

申请号：US16494687

申请日：2017-12-31

Applicant: KOOKMIN UNIVERSITY INDUSTRY ACADEMY COOPERATION FOUNDATION

Inventor： Yeong Min JANG ,  Van Trang NGUYEN

IPC: H04B10/516 ,  H04B10/67 ,  H04B10/50

Abstract: An optical wireless transmission device according to an embodiment of the present invention comprises: a modulation unit for receiving input of a first input signal and outputting a first output signal; and a light source control unit for controlling a first light source in accordance with the first output signal. The first output signal repeats “0” and “1” in a first phase during clock time if a binary value of the first input signal is 0, and repeats “0” and “1” in a phase opposite from the first phase during the clock time if a binary value of the first input signal is 1.

公开(公告)号：US20190356385A1

公开(公告)日：2019-11-21

申请号：US16069822

申请日：2016-11-28

Applicant: KOOKMIN UNIVERSITY INDUSTRY ACADEMY COOPERATION FOUNDATION

Inventor： Yeong Min JANG ,  Van Trang NGUYEN ,  Chang Hyun HONG

IPC: H04B10/116 ,  H04B10/556 ,  H04B10/67 ,  H04N7/22

Abstract: An optical wireless communication apparatus includes: a modulator for generating a reference signal including periodically repeating binary zeros and ones, receiving an input of a first binary data signal, and outputting a second binary data signal, wherein the second binary data signal has the same frequency as the reference signal, and has the same phase as the reference signal when the first binary data signal comprises binary zeros and has an opposite phase to the reference signal when the first binary data signal comprises binary ones, or has the same phase as the reference signal when the first binary data signal comprises binary ones and has an opposite phase to the reference signal when the first binary data signal comprises binary zeros, and a transmitter for turning a first light source on or off according to the reference signal, and turning a second light source on or off according to the second binary data signal.