Invention Grant
- Patent Title: Time tracking in a non-negligible multipath spacing environment
- Patent Title (中): 时间跟踪在不可忽略的多路径间隔环境中
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Application No.: US10789535Application Date: 2004-02-26
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Publication No.: US07702001B2Publication Date: 2010-04-20
- Inventor: Roland Reinhard Rick , Parvathanathan Subrahmanya , Brian K. Butler , Shimman Patel , Thunyachate Ekvetchavit
- Applicant: Roland Reinhard Rick , Parvathanathan Subrahmanya , Brian K. Butler , Shimman Patel , Thunyachate Ekvetchavit
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM Incorporated
- Current Assignee: QUALCOMM Incorporated
- Current Assignee Address: US CA San Diego
- Agent Kenneth K. Vu; Kenyon S. Jenckes
- Main IPC: H04B1/707
- IPC: H04B1/707

Abstract:
In an antenna diversity environment, the timing offset of the receiver's fingers are based on the timing offset of the received peaks of the base station transmit signals. In a system with non-negligible multipath spacing, the timing offset of the received peaks of the base station transmit signals are not necessarily at the same location. In one embodiment, the demodulating elements for the signal from each base station antenna use the same offset for demodulating and determining an error signal based on pilot signal sampling prior to the timing offset and subsequent to the timing offset. The error signals are averaged and used by a time tracking loop to track the incoming signal. In another embodiment, the demodulating elements for the signal from each base station antenna independently time track the signals with different timing offsets for each finger. The preferred embodiment depends on the method used by the base station to multiplex the data onto multiple transmit antennas.
Public/Granted literature
- US20040165655A1 Time tracking in a non-negligible multipath spacing environment Public/Granted day:2004-08-26
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