Simultaneous two-way transmission of information signals in...

Details Simultaneous two-way transmission of information signals in... Simultaneous two-way transmission of information signals in...

2007-03-06

2007-03-06

Vuong, Quochien B. (Department: 2684)

Telecommunications

Transmitter and receiver at same station

C455S562100, C455S282000, C455S003050

Reexamination Certificate

active

09852469

ABSTRACT:
This invention provides designs for communication systems that use adaptive filters in circuits whose purpose is to enable two-way transmission of information signals in the same frequency band at the same time over twisted pair channels, coaxial cable channels, fiber optic channels, or wireless channels. The methodology allows two-way DSL transmission over telephone lines, making use of existing DSL hardware and signal standards, so that the upload speed is increased by an approximate factor of ten. Applied to wireless systems with single antennas at the two ends of the channel, a doubling of the data rate is achieved for a given bandwidth. Applied to wireless systems with 2-way adaptive antenna arrays at a central location and a 2-way adaptive antenna array at each of a plurality of subscriber locations, the data rate for a given bandwidth is increased by a large factor.

REFERENCES:
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patent: 5812933 (1998-09-01), Niki
patent: 5999901 (1999-12-01), Knittle et al.
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patent: 6480699 (2002-11-01), Lovoi
patent: 6563931 (2003-05-01), Soli et al.
patent: 2002/0080066 (2002-06-01), Dent

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