Equalizing Zak-OTFS in the frequency domain exploits the banded channel structure, cutting complexity from O(M^3 N^3) to O(M^2 N^2).
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Low-Complexity Frequency Domain Equalization of Zak-OTFS in Doubly-Spread Channels
Equalizing Zak-OTFS in the frequency domain exploits the banded channel structure, cutting complexity from O(M^3 N^3) to O(M^2 N^2).