Quadrature amplitude modulation wave demodulator provided with b

Details Quadrature amplitude modulation wave demodulator provided with b Quadrature amplitude modulation wave demodulator provided with b

1990-06-20

1991-10-15

Pascal, Robert J.

Demodulators

Phase shift keying or quadrature amplitude demodulator

375 39, H03D 300

Patent

active

050577867

ABSTRACT:
A quadrature amplitude modulation wave demodulator which includes a fixed equalizer having a first band-pass filter applied with a quadrature amplitude modulation wave reception signal for outputting an in-phase component with respect to a carrier wave for the reception signal, and a second band-pass filter applied with the reception signal for outputting a quadrature component with respect to the carrier wave for the reception signal. There is provided a vector multiplication section for performing vector multiplication between one vector having outputs of the first and second band-pass filters as two components, and another vector having two reference carrier waves in quadrature to each other as two components.

REFERENCES:
patent: 4849706 (1989-07-01), Davis et al.
patent: 4871974 (1989-10-01), Davis et al.

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