Demodulator for consumer uses

Details Demodulator for consumer uses Demodulator for consumer uses

1992-12-30

1996-08-27

Chin, Stephen

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

375345, 329306, H03D 100, H04L 2706

Patent

active

055508693

ABSTRACT:
A demodulator responsive to a symbol containing analog signal includes a pair of relatively inexpensive analog-to-digital converters for sampling I and Q channels of the signal only once per symbol. A derotator responsive to outputs of the converters and a digital signal representing frequency and phase corrections for an input to the demodulator operates in accordance with a CORDIC function to derive I and Q channel digital signals that are compensated by the corrections. A digital phase shifter responsive to at least one of the digital I and Q signals controls when the input is sampled by the converter.

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Volder et al., "The CORDIC Trigonometric Computing Technique," IRE Transactions on Electronic Computers, Sep. 1959, pp. 330-334.
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