1
William T McDavid, William W Bryce: Symbol generator for phase modulated system. Terra Marine Engineering, Gregory M Howison, May 17, 1988: US04745628 (131 worldwide citation)

A symbol generator is provided for generating a filtered analog waveform for use in phase modulating a carrier. A memory (30) is provided for storing predetermined waveform segments. The waveform segments are correlated with an input data stream. The data stream is converted to an address for the me ...


2
William T McDavid, William W Bryce, Talal A Itani: Phase modulated system with phase domain filtering. Terra Marine Engineering, Ross Howison Clapp & Korn, October 9, 1990: US04962510 (124 worldwide citation)

A phase modulation system includes a phase mapping circuit (218) for mapping binary data into a plurality of discrete phase values in accordance with a predetermined phase modulation scheme. The discrete phase values are then filtered in the phase domain by a filter (220) to provide a filtered outpu ...


3
William T McDavid, William W Bryce: Power leveling telemetry system. Terra Marine Engineering, Ross Howison Clapp & Korn, September 19, 1989: US04868795 (100 worldwide citation)

A seismic telemetry system with automatic power leveling is comprised of a command station (10) and a plurality of remote data acquisition units (14). Each of the DAU's (14) includes an antenna (18) for receiving commands and transmitting data and is connected to a T/R switch (34). Commands are rece ...


4
William F Russell, William W Bryce: Real time seismic telemetry system. Terra Marine Engineering, Jerry W Mills, Gregory M Howison, May 5, 1987: US04663744 (79 worldwide citation)

A real time seismic telemetry system includes a central station (10) for communication with a plurality of remote data acquistion units (14). The command station (10) has a command unit (34) for controlling the operation of a transmitter (40) for providing instructions to the data acquistion units ( ...