ADVANCED CHANNEL ESTIMATION FOR OTFS: SMOOTHNESS OPTIMIZED WITH NOISE AN MODE AWARENESS

• Main Authors: Pfadler, Andreas, Szollmann, Tom
• Format: Patent
• Language: English; French; German
• Published: 19.03.2025
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

Method for channel estimation in a wireless communication system using an orthogonal time frequency and space (OTFS) modulation with at least one pilot-symbol placed in the delay-Doppler domain, comprisinga) performing at least part of a 2D discrete symplectic Fourier transform (DSFT) to map the time-frequency symbols of a received frame to a pilot region and thereby perform an initial LS CMDE in the delay-Doppler domain,b) minimize the energy of the second order derivatives of the regularization matrix H in the time frequency domain, subject to the condition that the respective channel main diagonal estimation of the minimized regularization matrix transformed to the pilot region of delay doppler-Domain does not deviate with respect to an Euclidean norm from the initial LSCMD estimate by more than a relaxation threshold δ lager or equal to zero,i.e. minHRHP,TF∑m‾=0M−1∑,n‾=0N−1||GHRHP,TFα,βm‾n‾||F2 subject to 12||CQvecHRHP,TF−h^LS,DD||22≤δ,