公开(公告)号：US08948308B2

公开(公告)日：2015-02-03

申请号：US13860647

申请日：2013-04-11

Applicant: Electronics and Telecommunications Research Institute

Inventor： Hyoung Soo Lim ,  Tae Jin Jung

IPC: H04L27/20 ,  H04L27/18 ,  H04L27/26 ,  H04L27/34

CPC classification number: H04L27/20 ,  H04L27/183 ,  H04L27/2604 ,  H04L27/3488

Abstract: An apparatus and a method of transmitting hierarchically modulated signals are provided. The present invention includes: a basic layer symbol generator generating a first layer signal; an enhancement layer symbol generator generating a second layer signal synchronized with the first layer signal and having different signal power; and a hierarchical modulator hierarchically modulating the first layer signal and the second layer signal, wherein the enhancement layer symbol generator performs constellation rotation rotating bundles configured as constellation points formed by the second layer signal based on constellation points of the first layer signal by a predetermined angle. According to the exemplary embodiment of the present invention, it is possible to improve the receiving performance of the second layer signals by applying the constellation rotation technology to the second layer signals in regards of the signal transmission system using the hierarchical modulation technology.

Abstract translation: 提供了一种发送分层调制信号的装置和方法。 本发明包括：生成第一层信号的基本层符号发生器; 产生与第一层信号同步且具有不同信号功率的第二层信号的增强层符号发生器; 以及层次调制器，对所述第一层信号和所述第二层信号进行分层调制，其中所述增强层符号发生器基于所述第一层信号的星座点以预定角度执行配置为由所述第二层信号形成的星座点的星座旋转旋转束 。 根据本发明的示例性实施例，通过将星座旋转技术应用于使用分层调制技术的信号传输系统的第二层信号，可以提高第二层信号的接收性能。