Ananthanarayanan Chockalingam
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126
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Info Theory×1Signal Processing×1
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2026
Multiuser Zak-OTFS on the Uplink with Superimposed Spread-Pilots
This paper derives closed-form expressions for the effective channel between users in a multiuser Zak-OTFS system with heterogeneous delay-Doppler periods, and shows negligible inter-user interference under TF-shift-based multiple access. It employs a superimposed spread-pilot framework for IOR estimation and a DD dictionary-based scheme to mitigate pilot-data interference.
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