High Doppler shifts between base stations and test articles (TAs) pose the biggest problem to
Aeronautical mobile telemetry (AMT) implemented on a wireless LTE network. Our solution to
this problem includes a Doppler estimator/compensator (DEC) that proactively shifts the LTE
uplink (LTE UL) signals transmitted by the TA. We have designed the DEC in the form of an
applique’ that can be inserted between the transmit/receive ports of a COTS TA transceiver and
its antenna(s). The DEC estimates the Doppler shift using the LTE UL signals transmitted by the
TA, which carry a frequency offset that includes the Doppler shift. This not only provides a
clean, noise- and fading-free signal for Doppler estimation, but also allows us to do away with
the need to know the identity of the base station with which the TA is communicating. In this
paper, we provide an architectural description of the DEC and an outline of the algorithms that
have been incorporated into it. At present, a laboratory prototype of the DEC has been developed
using Universal Software Radio Peripherals (USRPs), coupled with a Linux PC to carry out most
of the computations. An FPGA-based implementation is currently under development.International Foundation for TelemeteringProceedings from the International Telemetering Conference are made available by the International Foundation for Telemetering and the University of Arizona Libraries. Visit http://www.telemetry.org/index.php/contact-us if you have questions about items in this collection
