Patent ID: 9705559
Date: 2017-07-11
CPC Classifications: G01R,H04B

Claim:
1. A method of monitoring a process of powering a portable device through a cable connected between a power supply and said portable device, the method comprising: applying a time-dependent current variation to one end of the cable in accordance with a spreading sequence; detecting a time-dependent voltage variation at the one end of the cable, the time dependent voltage variation resulting from said applying of the time-dependent current variation; determining a quantity indicative of an impedance of the cable assembly based on the time-dependent voltage variation and the spreading sequence, and; correlating the time-dependent voltage variation with the spreading sequence, wherein said determining the quantity indicative of the impedance of the cable assembly is based on the result of said correlating, wherein said correlating involves: multiplying the time-dependent voltage variation and the spreading sequence; and averaging over time the result of said multiplication.