Motion-aware mobile time and frequency tracking

Details Motion-aware mobile time and frequency tracking Motion-aware mobile time and frequency tracking

2011-06-07

2011-06-07

Pham, Chi H (Department: 2471)

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

C370S516000, C375S371000

Reexamination Certificate

active

07957343

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.

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International Search Report & Written Opinion—PCT/US2009/034925, International Search Authority—European Patent Office—Jul. 8, 2009.

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