Communications technology for unattended sensors
CA (United States) Lawrence Livermore National Lab., D.A. Fuess, USDOE, Washington, DC (United States), D Myers, D.M. Benzel, J Baker · 1993
The objective was designing and demonstrating proof-of-concept communication subsystems for use in unattended sensors. These designs investigated current, advanced technology for frequency synthesis and control, and the use of commercial, highly integrated radio frequency components. The three following subsystems were evaluated: (1) a synthesized (225--400 MHz) exciter/transmitter, (2) a wideband, 100-W, radio-frequency power amplifier (for boosting the level of the exciter/transmitter output), and (3) and a command receiver operating in the 240--270-MHz satellite communication band. These subsystems were integrated into a prototype sensor system. Software was written using the Lawrence Livermore National Laboratory`s Modular Intelligent Sensor System (MISS) specification for microprocessor control of these communication elements. Operation of the sensor system using these subsystems was demonstrated.