Continuously adjusted-bandwidth discrete-time phase-locked loop

Details Continuously adjusted-bandwidth discrete-time phase-locked loop Continuously adjusted-bandwidth discrete-time phase-locked loop

2006-12-05

2006-12-05

Pezzlo, John (Department: 2616)

Multiplex communications

Communication over free space

Combining or distributing information via code word channels...

C370S514000, C375S376000

Reexamination Certificate

active

07145894

ABSTRACT:
A user equipment which receives a CDMA communication signal that is wirelessly transmitted includes a system for correcting phase errors in an information signal which has been transmitted. The correction system comprises circuitry for generating a correction signal and for combining the correction signal with the information signal to produce a corrected information signal. An analyzer analyzes the phase of the corrected information signal and generates an error signal based on the deviation of the analyzed phase from a reference phase. A bandwidth controller recursively adjusts the phase of the corrected information signal such that the phase of said corrected information signal is substantially equal to said reference phase. The bandwidth controller selects a bandwidth within an adjustable range based on the error signal, estimates an offset based on the error signal, and modifies the correction signal using the offset.

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