Fig. 11: NMSE performance with estimated channel.
From: Low-complexity equalization of Zak-OTFS in the frequency domain
A Zadoff-Chu sequence with root 101 in the DD domain10 is used as a spread pilot. Sinc pulse shaping and Gauss pulse shaping with aτ = aν = 1.584, M = 31, N = 37, νp = 30 kHz, data SNR = 20 dB for sinc and 40 dB for Gauss, b = N + 1 for sinc and \(b=\lceil {\nu }_{\max }T\rceil +1\) for Gauss. Veh-A channel with \({\nu }_{\max }=815\) Hz. Sinc has poor NMSE, but Gauss has better NMSE. However, the Gauss pulse is not orthogonal and has poor equalization performance with estimated channel13.
