Home > Stephen B. Heppe, DSc, exclusive expert witness

cellular communications, engineering, radio technologies

Stephen B. Heppe, DSc, exclusive expert witness

Dr. Heppe has over 25 years of experience in the area of communications engineering with General Electric Space Division, Stanford Telecommunications, Telenergy and the Insitu Group.

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Areas of cellular communications expertise

  • Cellular communications
  • Communications control systems
  • Communications
  • Direction-finding and positioning
  • Engineering
  • GPS and DGPS technology
  • Mobile satellite services
  • Satellite communications
  • Surveillance systems
  • VHF aeronautical communications


  • Avionics systems
  • Communications
  • Consumer electronics
  • Digital data processing
  • Electrical engineering
  • Electrical circuit design
  • Navigation
  • Telecommunication equipment
  • Wireless technology

Educational background

He received a BSEE degree (Computer Science emphasis) from Princeton University in 1977 and his MS. and PhD degree in Electrical Engineering (Communications emphasis) from George Washington University in 1982 and 1989, respectively.

Patents and inventions

Dr. Heppe holds two US patents in the aforementioned technologies.


He has published several articles on the aforementioned technologies.

Employment history

Dr. Heppe has over 25 years of experience in the area of communications engineering with General Electric Space Division, Stanford Telecommunications, Telenergy and the Insitu Group.

He has served as an independent consultant and expert witness in satellite communications, GPS/cellular and radio technologies, CATV user interfaces, cell networks, GSM and Voice over IP (VoIP).

He has developed aircraft avionics, including data radios, GPS navigation, satellite communications, video processing, RF transmission and sensors and flight control, as well as VHF radio communications protocol for aircraft networking, spectrum engineering for satellite communications (Globalstar), mobile satellite systems and various space-based government systems including Defense Satellite Communications System (DSCS), the Strategic Defense System (SDS), space-based radar (SBR), Milstar, NASA Tracking and Data Relay Satellite System (TDRSS), various naval satellite systems and the network for the U.S. Air Force Consolidated Space Operations Center (CSOC).

Dr. Heppe is familiar with GPS position and velocity determination for aircraft, spacecraft and ground vehicles, differential GPS and automatic dependent surveillance (ADS), navigation accuracy determination, flight-testing hardware and software, and protocol development and signal processing.

Dr. Heppe has testified in numerous patent cases and in an ITC matter.

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