Automatic frequency correction method and receiver for time...

Details Automatic frequency correction method and receiver for time... Automatic frequency correction method and receiver for time...

2006-09-05

2006-09-05

Feild, Joseph (Department: 2617)

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

C455S257000, C455S255000, C455S259000, C455S260000, C375S344000

Reexamination Certificate

active

07103339

ABSTRACT:
A receiver for use in a wireless communication system includes a voltage controlled oscillator and estimating means for obtaining a frequency estimate to adjust the voltage controlled oscillator, thereby correcting an oscillator frequency error. The estimating means performs a number of block correlations on a received signal with a known midamble reference. The output of the block correlators are conjugately multiplied and summed to produce a low-variance estimate of the phase change between correlators. A number of the largest summed values are located, and the located values that exceed a detection threshold are summed to provide a single complex number whose angle is an estimate of the phase change between the correlators.

REFERENCES:
patent: 5684836 (1997-11-01), Nagayasu et al.
patent: 6181923 (2001-01-01), Kawano et al.
patent: 6606487 (2003-08-01), Sternberg
patent: 6728301 (2004-04-01), Chrisikos
patent: 2003/0064693 (2003-04-01), Sternberg

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