Chapter: Authors and Contributors
John Davis' research interests lie in the field of wireless communications at
the systems level. To date, he has
been involved with work at the physical level, datalink level and
At the physical level, he did both indoor and outdoor propagation measurements. Indoor measurements were taken within Cory Hall (U.C. Berkeley) at 2.4 GHz while outdoor measurements involved the PATH Intelligent Vehicle Highway Project and considered propagation at 900 MHz between vehicles in single file. Both the indoor and outdoor measurements used a network analyzer and disc-cone antennas (omnidirectional) to measure the frequency response of a stationary environment with a given separation distance between the receive and transmit antennas. In both of the measurements above, time delay spread, path loss rate, and Rician K factor were measured.
John Davis worked on network software configuration while interning at the IBM, T.J. Watson Research Center in Yorktown Heights, NY. The job involved configuring IBM RF wireless PCMCIA adapter cards to run TCP/IP over a wireless link. The adapter cards allowed a wireless LAN to be set up with portable computer (most notably, IBM's ThinkPad) and the TCP/IP configuration allowed the wireless LAN to connect to the Internet. The adapter cards adhered to a slow frequency hopping protocol.
Most recently, he has been working on datalink protocols for the InfoPad project. Specifically he has been studying the Virtual Cell concept and Space Time Reservation Multiple Access (STRMA) with intent to implement these schemes as the uplink of the InfoPad system. STRMA and Virtual Cells provide an elegant approach to dynamic channel allocation using decentralized control.
John Davis contributed (portions of) pages on