Pulse or digital communications – Receivers – Angle modulation
Patent
1996-07-10
1999-06-22
Chin, Wellington
Pulse or digital communications
Receivers
Angle modulation
375355, H04L 2714, H04L 2716, H04L 2722
Patent
active
059149850
ABSTRACT:
A digital demodulator capable of a high speed operation. An automatic frequency controller (AFC) estimates a frequency deviation .DELTA..omega. on the basis of a detected sample signal which is outputted at an oversampling interval by a receiving filter. The AFC can estimate the frequency deviation before a stable operation of a bit timing recovery circuit (BTR). The AFC generates a frequency deviation correcting signal for each decision timing on the basis of the estimated frequency deviation, and decision timing information from the BTR. A multiplier eliminates a frequency deviation component from an input signal in response to the frequency deviation correcting signal.
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Chin Wellington
Corrielus Jean B.
Mitsubishi Denki & Kabushiki Kaisha
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