Multi-modulation scheme compatible radio

Details Multi-modulation scheme compatible radio Multi-modulation scheme compatible radio

1990-12-19

1994-12-27

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

375 17, 375 45, 455 73, H04L 2710

Patent

active

053772296

ABSTRACT:
A transceiver compatible with both wide channel constant envelope 4 level FSK FM modulation and narrow channel .pi./4 differential QPSK linear modulation allows compatible interaction between modified constant envelope and non-constant envelope transmitters. All Nyquist filtering occurs in the transmitters, and none in the receiver.

REFERENCES:
patent: 4601048 (1986-07-01), Ryan
patent: 4720839 (1988-01-01), Feher et al.
patent: 4731796 (1988-03-01), Masterson et al.
patent: 4843615 (1989-06-01), Davis

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