Invention Grant
- Patent Title: Motion-aware mobile time and frequency tracking
- Patent Title (中): 运动感知移动时间和频率跟踪
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Application No.: US12261648Application Date: 2008-10-30
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Publication No.: US07957343B2Publication Date: 2011-06-07
- Inventor: Ming-Chang Tsai , Jigneshkumar Shah , Kanu Chadha
- Applicant: Ming-Chang Tsai , Jigneshkumar Shah , Kanu Chadha
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM Incorporated
- Current Assignee: QUALCOMM Incorporated
- Current Assignee Address: US CA San Diego
- Agent Peng Zhu; Jeffrey D. Jacobs; Donald C. Kordich
- Main IPC: H04W56/00
- IPC: H04W56/00 ; H04L7/00 ; H04J11/00

Abstract:
A method is provided for compensating for clock drift error and movement error of an access terminal. A forward link error is obtained that is attributable to at least a first error (e.g., clock drift error) component and a second error (e.g., movement error) component. The first error component and the second error component are estimated based on the obtained forward link error. A receive clock of the access terminal is compensated based on a combination of the first error component and the second error component. A transmit clock of the access terminal is compensated based on a difference between the first error component and the second error component. The forward link error may include a timing synchronization error between the access terminal and an access point as well as a frequency synchronization error between a forward link frequency and a baseband reference frequency.
Public/Granted literature
- US20090225662A1 MOTION-AWARE MOBILE TIME AND FREQUENCY TRACKING Public/Granted day:2009-09-10
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