Invention Grant
US08855255B2 Systems and methods for optimizing timing phase in modem devices
有权
用于优化调制解调器设备中的时序相位的系统和方法
- Patent Title: Systems and methods for optimizing timing phase in modem devices
- Patent Title (中): 用于优化调制解调器设备中的时序相位的系统和方法
-
Application No.: US10113230Application Date: 2002-03-29
-
Publication No.: US08855255B2Publication Date: 2014-10-07
- Inventor: Qing Chen , Qian Cheng
- Applicant: Qing Chen , Qian Cheng
- Applicant Address: US IL Schaumburg
- Assignee: U.S. Robotics Corp.
- Current Assignee: U.S. Robotics Corp.
- Current Assignee Address: US IL Schaumburg
- Agency: Mayer, Brown, Rowe & Maw
- Main IPC: H04L7/00
- IPC: H04L7/00

Abstract:
Systems and methods are provided for performing the required phase calculation in a telecommunications system in order to optimize system performance more quickly and with reduced complexity as compared to prior approaches to solving this problem. In accordance with the preferred exemplary embodiment of the present invention, the phase delay of the precursor equalizer (EQ) is calculated off-line and as a result it is not necessary to fill the precursor EQ delay line with the indicated number of symbols as in the previous approach. Additionally, because the precursor EQ is fractionally spaced, both sine and cosine values of the 4kHz tone's initial phase can be achieved simultaneously. As a result, only 36 quick timing sequence (QTS) symbols are needed in order to perform the required estimation.
Public/Granted literature
- US20030185324A1 Systems and methods for optimizing timing phase in modem devices Public/Granted day:2003-10-02
Information query