Invention Grant
- Patent Title: Phantom use in DSL systems
- Patent Title (中): 幻影在DSL系统中的应用
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Application No.: US11267623Application Date: 2005-11-04
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Publication No.: US07773497B2Publication Date: 2010-08-10
- Inventor: John M. Cioffi , Bin Lee , Wonjong Rhee , Georgios Ginis
- Applicant: John M. Cioffi , Bin Lee , Wonjong Rhee , Georgios Ginis
- Applicant Address: US CA Redwood City
- Assignee: Adaptive Spectrum And Signal Alignment, Inc.
- Current Assignee: Adaptive Spectrum And Signal Alignment, Inc.
- Current Assignee Address: US CA Redwood City
- Agency: Blakely, Sokoloff, Taylor & Zafman LLP
- Main IPC: H04L5/20
- IPC: H04L5/20

Abstract:
Superimposing phantom-mode signals reinforces existing differentially driven DSL downstream signals in a vectored binder of DSLs or reinforces upstream vectored signals in a binder of differentially excited twisted pairs, thus expanding the extra transmission modes of the previous GDSL multi-wire two-sided-excitation invention to the case where coordination can only occur on one-side of the binder. Each pair is treated as a common-mode antenna with respect to earth ground, with some pairs selectively excited at the transformer center tap at the transmit end with respect to a common (earth or chassis) ground reference. Corresponding receivers on other non-excited pairs sense the signals between their center taps and a ground at the opposite ends of the lines to the exciting transmitters. A dual use with hybrid circuits allows the receiving circuit to also have an upstream transmitter and an upstream-sensing receiver on the center tap of the opposite side of an adjacent wire.
Public/Granted literature
- US20060268966A1 Phantom use in DSL systems Public/Granted day:2006-11-30
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