Multi-point OFDM/DMT digital communications system including rem

Details Multi-point OFDM/DMT digital communications system including rem Multi-point OFDM/DMT digital communications system including rem

1996-08-22

1998-08-04

Kizou, Hassan

Multiplex communications

Generalized orthogonal or special mathematical techniques

Particular set of orthogonal functions

375316, 375260, 370210, H04J 1100

Patent

active

057905142

ABSTRACT:
A multi-point communications system is set forth. The communications system comprises a primary transmitter disposed at a primary site and a plurality of receivers respectively disposed at a plurality of secondary sites. The primary transmitter generates OFDM/DMT transmissions over a first number of transmission bins to transmit communication data in those bins. A transmission medium is used for transmitting the OFDM/DMT transmissions from the primary transmitter at the primary site to the plurality of receivers disposed at a plurality of secondary sites. Each of the plurality of receivers employs a unique receiver architecture that digitally processes exclusively a reduced subset of the first number of bins transmitted by the primary transmitter to recover communication data that is transmitted in the reduced subset of the first number of bins. Such a receiver architecture eliminates much of the complexity typically associated with receiving and processing a wide-band OFDM/DMT signal, thereby making the communications system subject to economical and practical implementation in applications having receivers respectively located at a large number of secondary sites.

REFERENCES:
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patent: 5228025 (1993-07-01), Le Floch et al.
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patent: 5602835 (1997-02-01), Seki et al.
patent: 5608725 (1997-03-01), Grube et al.
John A. C. Bingham, "Multicarrier Modulation for Data Transmission: An Idea Whose Time Has Come," 1990, pp. 5, 6, 7, 8, 11, 12, 13, and 14.
"The Optus Vision: Telephony, Internet and Video," Aug. 1996.
"Cablespan 2300", Training Presentation, Tellabs, Inc., 1996.

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