Optimization technique for layered modulation
    3.
    发明授权
    Optimization technique for layered modulation 有权
    分层调制优化技术

    公开(公告)号:US07469019B2

    公开(公告)日:2008-12-23

    申请号:US11655001

    申请日:2007-01-18

    IPC分类号: H04L27/04

    摘要: A method and apparatus for optimizing a system for transmitting a layered modulated signal is disclosed. The method comprises the steps of defining the system in terms of a set of system parameters, including an optimal power separation S between a power of a first modulation layer and a power of a second modulation layer and a required system carrier-to-noise ratio (CNRS), determining an optimal power separation S to minimize the error rate of a lower layer modulated signal BERL, and selecting the remaining system parameters in the set of system parameters using the determined optimal power separation S.

    摘要翻译: 公开了一种用于优化用于发送分层调制信号的系统的方法和装置。 该方法包括以下步骤:根据一组系统参数定义系统,包括第一调制层的功率和第二调制层的功率之间的最佳功率分离S和所需的系统载波比 (CNRS),确定最佳功率分离S以最小化较低层调制信号BERL的误码率,以及使用确定的最佳功率分离S选择该组系统参数中的剩余系统参数。

    Optimization technique for layered modulation
    4.
    发明授权
    Optimization technique for layered modulation 有权
    分层调制优化技术

    公开(公告)号:US07184489B2

    公开(公告)日:2007-02-27

    申请号:US10693140

    申请日:2003-10-24

    IPC分类号: H04L27/04

    摘要: A method and apparatus for optimizing a system for transmitting a layered modulated signal is disclosed. The method comprises the steps of defining the system in terms of a set of system parameters, including an optimal power separation S between a power of a first modulation layer and a power of a second modulation layer and a required system carrier-to-noise ratio (CNRS), determining an optimal power separation S to minimize the error rate of a lower layer modulated signal BERL, and selecting the remaining system parameters in the set of system parameters using the determined optimal power separation S.

    摘要翻译: 公开了一种用于优化用于发送分层调制信号的系统的方法和装置。 该方法包括以下步骤:根据一组系统参数定义系统,包括第一调制层的功率和第二调制层的功率之间的最佳功率分离S和所需的系统载波比 (CNR S S),确定最佳功率分离S以最小化下层调制信号BERLL的错误率,并且选择系统中的剩余系统参数 参数使用确定的最佳功率分离S.

    Simplified scrambling scheme for satellite broadcasting systems
    5.
    发明申请
    Simplified scrambling scheme for satellite broadcasting systems 有权
    卫星广播系统的简化扰频方案

    公开(公告)号:US20060215785A1

    公开(公告)日:2006-09-28

    申请号:US10568384

    申请日:2004-08-27

    IPC分类号: H04L27/12

    摘要: A simplified scrambling scheme that unifies all signals of a satellite broadcasting system, including frame header (404), frame body (402) and pilot symbols (408) with a common reference phase. This results in the simplification and increased flexibility of the receiver front-end design without affecting the overall system performance. In many current communications systems with frame headers and pilot symbols, the phases of frame headers and pilot syrnbols are not designed to be aligned with any constellation points of the modulated data from the frame body. This scrambling scheme takes into account possible impact due to irregular phase changes between frame headers/pilot symbols and modulated data.

    摘要翻译: 一种简化的加扰方案,其将具有公共参考相位的卫星广播系统的所有信号(包括帧头部(404)),帧体(402)和导频符号(408)统一起来。 这导致了接收机前端设计的简化和增加的灵活性,而不会影响整个系统的性能。 在具有帧头和导频符号的许多当前通信系统中,帧头和导频符号的相位不被设计为与来自帧体的调制数据的任何星座点对准。 该加扰方案考虑到由帧头/导频符号和调制数据之间的不规则相位变化引起的可能的影响。