• BYU MARS ROVER AT THE 2018 UNIVERSITY ROVER CHALLENGE

      Rozsa, Jace; Averett, Tyler; Killpack, Marc; Rice, Michael; Brigham Young University (International Foundation for Telemetering, 2018-11)
      This paper describes the design and performance of the BYU mars rover with an emphasis on the wireless communications system and the transmission and reception of data vital to the performance of the rover.
    • CFO Estimation by Exploiting Channel Sparsity in Aeronautical Telemetry

      Afran, Shah; Saquib, Mohammad; Rice, Michael; The University of Texas at Dallas; Brigham Young University (International Foundation for Telemetering, 2018-11)
      In this paper, we explore a carrier frequency offset (CFO) estimation scheme with sparsity-constraint (SC) on the aeronautical telemetry channels. This SC CFO estimator is implemented in two steps. In the first step, channel support is recovered by combining compressed sensing techniques with the CFO estimate based on the non-sparsity constraint (NSC) on the channel. Next we use the estimated channel support to derive the SC CFO estimator. Simulations are performed to compare the performance of the SC CFO estimator against the existing NSC CFO estimators using shaped offset QPSK version TG (SOQPSK-TG) modulated iNET-formatted data over an aeronautical test channel.
    • ON THE PERFORMANCE OF FILTER BASED EQUALIZERS FOR 16APSK IN AERONAUTICAL TELEMETRY ENVIRONMENT

      Arabian, Farah; Rice, Michael; BYU, Department of Electrical and Computer Engineering (International Foundation for Telemetering, 2018-11)
      16APSK is a candidate modulation for aeronautical telemetry because it has better spectral efficiency than SOQPSK-TG, but requires a linear RF power amplifier. This paper investigates the BER performance of filter-based equalizers for 16APSK operating over multipath channels measured at Edwards AFB. The results show that decision feedback equalizers outperform the other equalizers and are capable of providing excellent multipath mitigation.
    • UNIFICATION OF SIGNAL MODELS FOR SOQPSK

      Perrins, Erik; Rice, Michael; University of Kansas, Electrical Engineering & Computer Science Department; BYU, Department of Electrical and Computer Engineering (International Foundation for Telemetering, 2018-11)
      This paper begins by summarizing a recent advancement in the way that shaped offset quadrature phase shift keying (SOQPSK) waveforms can be viewed. This new viewpoint succeeds in eliminating the need for SOQPSK to be thought of as a “special” kind of correlated, ternary continuous phase modulation (CPM). Instead, SOQPSK can be viewed as an ordinary, binary CPM. We provide all of the details necessary to achieve a complete unification of SOQPSK models at the waveform level, at the bit sequence level, and in terms of waveform initialization. With this information, SOQPSK users can easily mix and match SOQPSK models at the transmitter and receiver in order to make use of the advantages of each model.