Frequency offset correction

Details Frequency offset correction Frequency offset correction

1995-10-20

1998-03-24

Faile, Andrew

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

375344, 331 12, 455265, H04B 118

Patent

active

057323399

ABSTRACT:
In a method and a device for correcting a frequency offset between a receive signal and a reference signal, the receive signal, being fed to a frequency converter which also receives a conversion signal in order to produce a transposed signal, the conversion signal is produced by a local oscillator in response to a control signal. The device initializes the control signal according to the reference signal. An estimator receives the transposed signal and the control signal and produces repetitively an estimate of the frequency offset comprising the sum of a correction value and an adjustment value respectively greater than and less than a predetermined correction threshold. The control signal is modified in response to the correction value. The transposed signal is connected using at least one of the successive estimates.

REFERENCES:
patent: 4647864 (1987-03-01), Rafferty et al.
patent: 4879728 (1989-11-01), Tarallo
patent: 5062123 (1991-10-01), Geile et al.
patent: 5152005 (1992-09-01), Bickley
patent: 5282227 (1994-01-01), Crawford
patent: 5434889 (1995-07-01), Baier
patent: 5438591 (1995-08-01), Oie et al.

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