An apparatus and method for interference cancellation in multiple-antenna communication system is disclosed. Some of the terms represent objects or concepts or semantic attributes; some other terms represent properties associated with the objects or concepts or attributes. The invention relates to methods, apparatus for performing such methods, and to software stored on a computer-readable medium for causing a computer to perform such methods. A method of operating an electronic oil pump is also disclosed. Accordingly, the width andor the length dimension is defined as within \u215b\u03bb of a predetermined dimension D.