Digital demodulator arrangement for quadrature signals

Details Digital demodulator arrangement for quadrature signals Digital demodulator arrangement for quadrature signals

1984-10-18

1986-04-15

Bookbinder, Marc E.

Pulse or digital communications

Repeaters

Testing

329107, 375 39, 375 77, 375 80, 455324, H03D 122, H03D 300, H03D 500, H04B 130

Patent

active

045832390

ABSTRACT:
A direct conversion receiver in which the quadrature I and Q signals are converted into pulse density modulated digital data streams by delta-sigma modulators 14, 15. The resultant digital data streams are then processed in a logic block 18 according to predetermined logic truth tables. The digital output of the processor 18 is then converted back to an analogue signal.

REFERENCES:
patent: 3609555 (1971-09-01), Van Blerkom et al.
patent: 3701948 (1972-10-01), McAuliffe
patent: 3953805 (1976-04-01), Couvillon
patent: 3955191 (1976-05-01), Lambourn
patent: 4090145 (1978-05-01), Webb
patent: 4470147 (1984-09-01), Goatcher
patent: 4509017 (1985-04-01), Andren et al.

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