公开(公告)号：US09787518B2

公开(公告)日：2017-10-10

申请号：US15436421

申请日：2017-02-17

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xiaoyue He ,  Jianhua Liu ,  Fanglin Sun ,  Quanbo Zhao

IPC: H04L5/12 ,  H04L23/02 ,  H04L27/34 ,  H04L1/00

CPC classification number: H04L27/3416 ,  H04L1/0054 ,  H04L27/3411

Abstract: Disclosed are a digital modulation method and apparatus. The digital modulation method includes: determining to-be-moved constellation points in a rectangular constellation diagram, where constellation points in the rectangular constellation diagram are distributed at corresponding coordinate points in a plane rectangular coordinate system, the to-be-moved constellation points include S columns of constellation points, in four quadrants of the plane rectangular coordinate system, and the rectangular constellation diagram is a constellation diagram generated by performing quadrature amplitude modulation (QAM) on a data bit stream; dividing to-be-moved constellation points in each of the four quadrants into two constellation point sets according to a bisector of an area between a horizontal coordinate axis and a straight line corresponding to a maximum absolute value of vertical coordinates in the rectangular constellation diagram; and horizontally moving and vertically moving each constellation point set in the four quadrants, to obtain a cross-shaped constellation diagram.