TF-shift multiuser Zak-OTFS with heterogeneous frames and superimposed ZC spread-pilots yields near-single-user IOR estimation and filter-dependent spectral-efficiency gains over embedded pilots.
Spar se delay- Doppler channel estimation in rapidly time-varying channe ls for mul- tiuser OTFS on the uplink,
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Multiuser Zak-OTFS on the Uplink with Superimposed Spread-Pilots
TF-shift multiuser Zak-OTFS with heterogeneous frames and superimposed ZC spread-pilots yields near-single-user IOR estimation and filter-dependent spectral-efficiency gains over embedded pilots.