Multiplex communications – Generalized orthogonal or special mathematical techniques – Fourier transform
Patent
1996-12-23
2000-09-12
Nguyen, Chau
Multiplex communications
Generalized orthogonal or special mathematical techniques
Fourier transform
370484, 370490, H04J 1100
Patent
active
061187585
ABSTRACT:
A multi-point communications system is set forth herein. The communications system includes a receiver and transmitter disposed at a primary site for communication with a plurality of remote service units disposed at respective secondary sites. The receiver of the primary site receives OFDM/DMT signals over a number of transmission bins. A transmitter at the remote service unit includes an improved transmitter architecture. The transmitter comprises a first circuit for converting a signal into a first serial digital data stream and a second circuit for generating a second serial digital data stream from the first serial digital data stream of the first means. The second serial digital data stream is a digital representation of an OFDM/DMT signal that is to be transmitted to the receiver of the primary site and is generated from the first serial digital data stream through a modulated direct digital synthesis thereof. A third circuit is used to convert the second serial digital data stream into an analog OFDM/DMT signal for transmission to the receiver of the primary site.
REFERENCES:
patent: 4300229 (1981-11-01), Hirosaki
patent: 4425665 (1984-01-01), Stauffer
patent: 4535472 (1985-08-01), Tomcik
patent: 4731816 (1988-03-01), Hughes-Hartogs
patent: 4980897 (1990-12-01), Decker et al.
patent: 5285474 (1994-02-01), Chow et al.
patent: 5479447 (1995-12-01), Chow et al.
patent: 5524001 (1996-06-01), Beaudry et al.
patent: 5539777 (1996-07-01), Grube et al.
patent: 5621730 (1997-04-01), Kelley
patent: 5625651 (1997-04-01), Cioffi
patent: 5732068 (1998-03-01), Takahashi et al.
patent: 5790516 (1998-08-01), Gudmundson et al.
patent: 5796820 (1998-08-01), Sasada
patent: 6002722 (1999-12-01), Wu
patent: 6028891 (2000-02-01), Ribner et al.
"The Optus Vision: Telephony, Internet and Video ", Australian Communications, (Aug. 1996) pp. 61 et seq.
Marchok Daniel J.
Melsa Peter J. W.
Younce Richard C.
Nguyen Chau
Nguyen Phuongchau Ba
Tellabs Operations Inc.
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