Radio reception apparatus symbol timing control method, and...

Details Radio reception apparatus symbol timing control method, and... Radio reception apparatus symbol timing control method, and...

2006-12-12

2006-12-12

Anderson, Matthew D. (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

C455S205000, C455S101000, C455S139000, C375S324000, C375S326000, C375S327000

Reexamination Certificate

active

07149491

ABSTRACT:
In a radio reception apparatus, a quadrature detector provides its digital output signal to a band-limiting filter after lowering a sampling frequency by a sampling frequency converter. Based on a correlation value obtained from an output of the band-limiting filter by a symbol timing detecting circuit, a symbol timing deviation detecting circuit detects a magnitude and a direction of a deviation of the timing of sampling in the sampling frequency converter, and controls timing of the sampling in the sampling frequency converter. Thereby, a symbol point of the correct timing is extracted.

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