Reference wires to remove noise and artifacts in cardiac mapping catheter

A method comprising:

• (a) receiving a first signal from a first pair of wire segments, the first pair of wire segments extending along a length of a catheter, the first signal being generated from a sensor coupled with the first pair of wire segments, the first signal including a first artifact associated with motion of at least one wire segment of the first pair of wire segments due to movement of the length of the catheter, the first pair of wire segments has a first capacitance change due to the motion of the at least one wire segment of the first pair of wire segments resulting from a movement of the length of the catheter, the first artifact occurring in a timeframe;
• (b) receiving a second signal from a second pair of wire segments, the second pair of wire segments extending along the length of the catheter, the second signal including a second artifact associated with motion of at least one wire segment of the second pair of wire segments due to movement of the catheter, the second pair of wire segments has a second capacitance change due to the motion of the at least one wire segment of the second pair of wire segments resulting from the movement of the catheter, the second artifact occurring in the timeframe;
• (c) blocking the first artifact, caused by the first capacitance change, from the first signal during the timeframe to provide a corrected first signal.