A method of inactivating microorganisms such as viruses within a fluid such as a biological fluid is disclosed. In addition, initial phase angles \u03c60j and \u03c60k of linear instantaneous phases of the xj and xk are estimated, respectively. Each station module includes a station module circuit for switching a source of electrical power to open and close at least one of a plurality of valves. The hub selects, according to the feedback information, a subset of the antennas for transmission of a remaining portion of the frame to the terminal.