Compact superposed modulated signal generator

Details Compact superposed modulated signal generator Compact superposed modulated signal generator

1991-11-22

1994-05-17

Chin, Stephen

Pulse or digital communications

Repeaters

Testing

375 60, 332103, 341 68, H04L 2704, H04L 2712, H04L 2720

Patent

active

053134940

ABSTRACT:
A compact superposed modulated signal generator for use in a digital transmission system for transmitting digital information, including a first filter for converting an input NRZ digital data signal into a double interval raised cosine pulse, a second filter for converting the input NRZ digital data into a single interval raised cosine pulse, an attenuator for attenuating the signal output from the second filter, an adder/subtracter for superposing a signal generated by the first filter with a signal controlled by the attenuator, and a third filter for controlling the bandwidth of a signal superposed by the adder/subtracter. The compact superposed modulated signal generator can be used in a satellite communication system, a mobile radio system, and terrestrial microwave communication links.

REFERENCES:
patent: 4339724 (1982-07-01), Feher
patent: 4417349 (1983-11-01), Hills et al.
patent: 4598267 (1986-07-01), Fukuda
patent: 4644565 (1987-02-01), Seo et al.
patent: 4731800 (1988-03-01), Motley et al.

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