Interference caused by the propagation of a transmit signal transmitted from a transmit antenna to a receive antenna is effectively cancelled by an improved signal cancellation system. The apparatus also includes a variable speed drive connecting each of the first and second motors electrically to drive the pump drive shaft. By applying the technology scheme of the present invention, the user plan operation at the user equipment side can be optimized, when a downlink carrier component is de-activated or de-configured. , to the gray room of the facility.