aeronautical telemetry, CPM, digital communication, multi-h CPM, PAM representation
ARTM CPM is a partial response, two-index continuous-phase modulation that was adopted as a standard in IRIG 106-04 for aeronautical telemetry. This waveform was selected because it achieves approximately three times the spectral efficiency of PCM/FM. However, the optimum receiver requires 128 real-valued matched filters and keeps track of the waveform state with a trellis of 512 states and 2048 branches. Various complexity reducing techniques are applied and the resulting loss in detection efficiency is quantified. It is shown that the full 512-state trellis is not required to achieve the desired detection efficiency: two different 32-state configurations were found to perform within 0.05 dB of optimal; two different 16-state configurations were found to perform within 1.0 dB of optimal; and an 8-state configuration was found to perform within 1.05 dB of optimal. The analysis and simulation results show that to achieve a given state complexity, proper combination of two or more complexity-reducing techniques generally outperforms the use of a single complexity-reducing technique.
BYU ScholarsArchive Citation
Rice, Michael D. and Perrins, Erik, "The Detection Efficiency of ARTM CPM in Aeronautical Telemetry" (2005). All Faculty Publications. 392.
Ira A. Fulton College of Engineering and Technology
Electrical and Computer Engineering
© 2005 Michael D. Rice and Erik Perrins
Copyright Use Information