Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Patent
1998-08-04
2000-11-07
Pham, Chi H.
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
H04K 110, H04L 2728
Patent
active
061447048
ABSTRACT:
A phase domain multiplexed communication system generates N carrier frequencies each with a unique phase according to a selected orthogonal vector containing N elements. A subscriber information signal is first divided through a signal divider (215, FIG. 6). Each divided signal is then upconverted through a mixer (220) and phase shifted according to the selected orthogonal vector. The resulting signal is then combined through a summing element (250) and transmitted. At a receiver, the incoming signal is coupled to a signal divider (315, FIG. 7) where the signal is divided into N signal components. Each signal component is downconverted and phase shifted so that the transmitted subscriber information can be extracted at a summing element (350). At the summing element (350) the desired subscriber signal components add in-phase while the signal components corresponding to other subscribers add out-of-phase.
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Hutchins Ruby Figor
Startup James William
Bogacz Frank J.
Corrielus Jean B.
LeMoine Dana B.
Motorola Inc.
Pham Chi H.
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