Patent ID: 7639598

Claim:
A system for achieving simultaneous, full-duplex communication over a single electrical conductor, the system comprising: a first transceiver terminal T 1 having a first input for receiving a first signal x; a second transceiver terminal T 2 having a second input for receiving a second signal y; a first communication circuit C 1 in T 1 between the first input and a point A for transmitting a signal representative of x from A to T 2 over the single electrical conductor; a second communication circuit C 2 in T 2 between the second input and a point B for transmitting a signal representative of y from B to T 1 over the single electrical conductor; a first estimator circuit E 1 in T 1 for measuring one or more signals relative to the point A; a second estimator circuit E 2 in T 2 for measuring one or more signals relative to the point B; the first estimator being operative to output a signal ŷ=f 1e (s 11 , . . . , s 1P , x); the second estimator being operative to output a signal {circumflex over (x)}=f 2e (s 21 , . . . , s 2Q , y); where: s 11 , s 12 ,. . . s 1P are the signals available for measurement relative to point A; s 21 , s 22 ,. . . s 2Q are the signals available for measurement relative to point B; f 1 (s 11 , . . . , s 1P , x, y)=0; f 2 (s 21 , . . . , s 2Q , x, y)=0; and {circumflex over (x)}, ŷ are estimates of x and y, respectively.