Sub-Block Turbo Equalization for CPM Waveforms in Multipath Environments

Continuous phase modulation schemes are used in many NATO interoperability standards, these standards are typically designed to be employed in urban environments with harsh multipath effects which cause fast fading and phase-inversions, and as such poor bit error rate (BER) performance. Sub-block equalization, a modified form of turbo equalization, is proposed and shown to offer better performance in these multipath environments. These results are supported by extrinsic information transfer (EXIT) chart analysis of the respective inner and outer codes.
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This paper was originally presented at the NATO Science and Technology Organization Symposium (ICMCIS) organized by the Information Systems Technology (IST) Panel, IST-200RSY the ICMCIS, held in Skopje, North Macedonia, 16–17 May 2023.