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Selected Projects

Selected Projects

The following is a sampling of the technology products I have had the pleasure of creating.  – Lee

Battery Powered Portable Tactical Wireless Surveillance System

Wireless Video Surveillance

The first rapidly deployable digital video wireless surveillance system. This work was done in a start up under extremely tight staffing and budget constraints. The resulting system comprised custom designed wireless cameras, a novel self-configuring wireless system, a ground-up IP based Digital Video Recorder and other novel and robust elements.

Technical Content

– System design
– Wireless design and radio selection
– Control algorithms
– User interface
– Embedded software
– PC-based (Linux) system software
– Digital video
– Data communications and networking
– Mechanical design for a physically abusive environment
– Power subsystem
Tactical Handheld Video Unit

Hand-held Video Viewing Unit

Designed for use by tactical officers, the project created a hand-held wireless video unit for use with a wireless surveillance system. The hand-held unit has hot-swappable batteries, supports gloved hand operation and uses very robust secure radio technology. The GUI was designed to be driven by a gloved hand using only the thumb.

Technical Content

– System design
– Wireless design and radio selection
– Ergonomics
– User interface
– Embedded software
– PC-based (Linux) system software
– Data communications and networking
– Mechanical design for a physically abusive environment
– Battery subsystem

 

Rayleigh Fading Simulator

Mobile Fading Simulator
Designed as a low cost mobile fading simulator this device found use in mobile radio test beds. The RS-1 uses software multi-channel numerically controlled oscillators (NCO) to create the fading statistics of a mobile radio environment.

Technical Content

– RF & IF analog design
– User interface
– Embedded software
– Electronic and PCB design
– Mechanical design
Rural Wireless Digital Telephony
Rural Wireless Telephony

The target customer for this project was an Indian company, with the ultimate customer being the Indian DOT.  Securing this project required epic battles with multiple large competitors before the DOT to have spectrum designated.  The team had 19 designers covering all aspects of wireless product design.  We used a blind equalized pi/4 QPSK modem.  Nailed the material cost estimate to within $3 (on the low side).

Technical Content

– System design
– UHF wireless link budgets
– Advanced modem development
– ASIC and FPGA design
– Call processing software
– Network management software
– Design for low cost manufacture
– Antennas
– Telephone interface hardware
– Power subsystem
– Packaging for indoor and outdoor environments
Aeronautical Telephony Design
GTE Airfone

This project advanced the state of the art in aeronautical mobile communications and was installed on 1500 aircraft. This project required working with the customer’s senior management team (VP level) as well as the customer’s engineers responsible for the day-to-day operations of the network, which was an operating revenue generating network.

Technical Content

– System design
– Radio channel characterization and system performance estimation
– On-air interface design
– Test platform creation
– Advanced modem design
– Telecom system specifications