Pulse or digital communications – Pulse position – frequency – or spacing modulation
Patent
1997-08-25
2000-06-06
Chin, Stephen
Pulse or digital communications
Pulse position, frequency, or spacing modulation
3582611, 341109, 341179, 375279, H03K 704
Patent
active
060728299
ABSTRACT:
To achieve economy of a transmission path with good quality of transmission and low expenditure compared to previous codes such as 4PSK-64PSK, the invention provides higher-value pulse duration encoding, such that there is provided only an alternating current of a frequency and phase position, with code elements of different pulse durations which are encoded by a different number of periods or half-periods. The following duration pulse is marked by an amplitude change.
REFERENCES:
patent: 3847732 (1974-11-01), Perreault
patent: 5050188 (1991-09-01), Dirr
patent: 5581368 (1996-12-01), Dirr
patent: 5587797 (1996-12-01), Dirr
patent: 5675609 (1997-10-01), Johnson
Chin Stephen
Jiang Lenny
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