This paper tackles the intricate challenge of channel estimation (CE) and symbol detection in high-mobility scenarios for orthogonal time frequency space (OTFS) systems. We introduce a novel partially superimposed pilots (PSP) pattern, strategically balancing computational complexity and CE accuracy by partially superimposing pilots and data symbols in the delay-Doppler (DD) domain. Additionally, we propose a CE and symbol detection (CESD) algorithm, employing an iterative approach that combines low complexity minimum mean squared error (LMMSE) for CE and simplicity-based detection for data symbols. Key contributions encompass optimal pilot pattern determination, a comprehensive iterative algorithm, and a thorough performance evaluation. Comparative analyses with state-of-the-art methods underscore the superior trade-off achieved by CESD in terms of normalized mean square error for CE, bit error rate, spectral efficiency, and computational complexity.
Optimal Partially Superimposed Pilot Pattern for OTFS Communication
24.06.2024
576062 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch