公开(公告)号：US20220337323A1

公开(公告)日：2022-10-20

申请号：US17625662

申请日：2019-11-28

Applicant: KOOKMIN UNIVERSITY INDUSTRY ACADEMY COOPERATION FOUNDATION

Inventor： Yeong Min JANG ,  Van Thang NGUYEN ,  Minh Duc THIEU ,  Ngoc Nguyen HUY ,  Tung Lam PHAM

IPC: H04B10/556 ,  H04N7/22 ,  H04B10/67 ,  H04L1/00

Abstract: A method of modulating an optical camera communication (OCC) signal by an OCC transmission node in an OCC system includes acquiring a binary data signal, grouping the binary data signal for every k bits to convert the binary data signal into a global phase shift signal having an integer value from 0 to M−1 (=2k−1), generating a data signal group by mapping the global phase shift signal to first to Mth mapping sequences in the form of an n*M/2-bit sequence based on a preset symbol group mapping table, generating a pulse wave signal by modulating the data signal group, and blinking each of a plurality of light sources included in the OCC transmission node according to the pulse wave signal. Accordingly, performance of the communication system may be improved.