Digitally-implemented demodulator

Details Digitally-implemented demodulator Digitally-implemented demodulator

H - Electricity

04

L

H04L 27/14 (2006.01) H03D 3/00 (2006.01)

Patent

CA 2292463

A digitally-implemented demodulator. A frequency-modulated signal is applied to a limiting amplifier such that the signal amplitude is fixed at a constant level. The signal if undersampled and quadrature demodulated. The demodulator generates the cross-product of the baseband complex envelope to recover the original modulating signal. A digital Frequency Shift Keyed signal can be further recovered by applying the recovered signal to a data slicer to square-up the signal, and a matched filter for improved error resistance.

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