1
Alan L Polivka, Charles Zahm: System for conducting video communications over satellite communication link with aircraft having physically compact, effectively conformal, phased array antenna. Harris Corporation, Charles Wands, October 31, 1995: US05463656 (155 worldwide citation)

A system architecture and communication methodology for significantly reducing the size of an aircraft antenna required to provide full broadcast quality video communications with an aircraft via a satellite communications link includes a combination of video bandwidth compression, spread spectrum w ...


2
Alan L Polivka, William L Matheson: Automatic train control system and method. Harris Corporation, Rogers & Killeen, October 27, 1998: US05828979 (141 worldwide citation)

A system and method for controlling the movement of plural freight trains through a multiple route railway system with improved efficiency and safety. Freight train movements are precisely monitored and orchestrated in accordance with a dynamic schedule that is determined through an evaluation of de ...


3
Alan L Polivka, James R Egnot, Robert E Heggestad, Jeffrey K Baker, William L Matheson: Method for advanced communication-based vehicle control. GE Harris Railway Electronics, Carl A Rowold, Armstrong Teasdale, October 1, 2002: US06459965 (64 worldwide citation)

A method is provided for controlling movement of a plurality of vehicles over a guideway partitioned into a plurality of guideway blocks. The method uses a control system including an onboard computer (OBC) located on board each vehicle, at least one server for communicating with the OBCs, and a veh ...


4
Jerome J Malone Jr, Alan L Polivka: Method for detecting the extent of clear, intact track near a railway vehicle. Transportation Technology Center, Dorr Carson & Birney P C, August 11, 2015: US09102341

A method is provided for detecting broken rail, track continuity, and track occupancy ahead of or behind a railroad vehicle traveling in fixed-block territory equipped with an AC track code wayside signal system or cab signal overlay system, and a communications link. This method, when used as an in ...


5
Alan L Polivka, James R Egnot, Robert E Heggestad, Jeffrey K Baker, William L Matheson: Advanced communication-based vehicle control method. John S Beulick, C O Armstrong Teasdale, May 23, 2002: US20020062181-A1

A method is provided for controlling movement of a plurality of vehicles over a guideway partitioned into a plurality of guideway blocks. The method uses a control system including an onboard computer (OBC) located on board each vehicle, at least one server for communicating with the OBCs, and a veh ...