Chapter 7: OTFS Channel Estimation

Learning Objectives

• Design an embedded pilot with appropriate guard region for the expected channel spread
• Implement a threshold-based path detector that recovers $(h_i, \ell_i, k_i)$ from the guard region
• Quantify pilot overhead and MSE of embedded pilot estimation vs OFDM DMRS
• Understand superimposed pilot designs that trade guard overhead for receiver complexity
• Recognize the CommIT cell-free OTFS pilot contribution and its downlink-uplink asymmetry