Adjustment of transmit power based on an estimated...

Details Adjustment of transmit power based on an estimated... Adjustment of transmit power based on an estimated...

2006-07-04

2006-07-04

Vo, Don N. (Department: 2631)

Pulse or digital communications

Transceivers

Modems

Reexamination Certificate

active

07072391

ABSTRACT:
To adjust transmit power of a DSL modem, an estimated electrical length of a loop is first determined when a 1stDSL modem at a 1stlocation transmits a plurality of signals to a 2ndDSL modem at a 2ndlocation. Each of the signals transmitted by the 1stDSL modem have a known frequency and are transmitted at a known power level. Upon receiving the signals, the 2ndDSL modem determines the received power level for each of the signals. The 2ndDSL modem then estimates an electrical length of a loop between the 1stand 2ndDSL modems for each of the signals received. The 2ndDSL modem then processes a plurality of estimated electrical lengths in accordance with a function to produce a determined electrical length. Having determined the electrical length, the 2ndDSL modem adjusts its transmit power accordingly.

REFERENCES:
patent: 6801601 (2004-10-01), Kamali et al.
patent: 2002/0172329 (2002-11-01), Rashid-Farrokhi et al.
patent: 2003/0156685 (2003-08-01), Erving et al.

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