• DISTRIBUTED TERRESTRIAL RADIOLOCATION USING THE RLS ALGORITHM

      Brown, Andrew P.; Iltis, Ronald A.; University of California (International Foundation for Telemetering, 2002-10)
      This paper presents the development of two distributed terrestrial radiolocation algorithms that use range estimates derived from DS-CDMA waveforms. The first algorithm, which is RLS-based, is derived as the solution of an approximate least-squares positioning problem. This algorithm has the advantage of reduced computational complexity, compared with the EKF-based algorithm that is presented. It is shown via simulations that both positioning algorithms perform well, with the performance of the EKF-based algorithm being superior.
    • LOW-COST TELEMETRY USING FREQUENCY HOPPING AND THE TRF6900™ TRANSCEIVER1

      Thornér, Carl-Einar I.; Iltis, Ronald A.; University of California, Santa Barbara (International Foundation for Telemetering, 2002-10)
      The ISM bands have opened up new opportunities for telemetry using spread-spectrum communications. A low-cost frequency-hopping radio is described here for the 900 MHz ISM band that can be programmed with a wide range of hop and data rates. The ‘C6201 DSP from TI is used to control the frequency and data rate of the TI TRF6900 transceiver chip using a custom interface of the 6201 EVM board to the serial I/O on the 6900 evaluation board.