1、1/66Contents1.Introduction.21.1 Document Structure.21.2 KeyApplication Scenarios.32.Basic Principles of OTFS.52.1 Principles of OTFS Modulation Transmitter.62.2 Principles of OTFS Modulation Receiver.82.3Analysis of Input-Output Relationship in OTFS.103.Analysis of Delay Doppler Domain Channel Chara

2、cteristics.123.1 Characteristics of Delay Doppler Domain Channel.123.1.1 Deterministic Description of Channels.123.1.2 Coherent and Stationary Regions of Channels.143.2 Delay Doppler Domain Channel Characteristics in High-Speed Railway Scenario.153.2.1 Channel Spreading Function Measurement System B

3、ased on LTE-R.153.2.2 High-Speed Railway Channel Spreading Function Characterization Based on LTE-R.173.3 Performance Evaluation of OTFS in Measured Channels.194.OTFS Channel Estimation and Data Detection.214.1 Pilot Design for Low-PAPR OTFS Channel Estimation.214.2 Off-grid Channel Estimation for O

4、TFS.264.3 Low-Complexity OTFS Data Detection Scheme Based on Expectation Propagation.285.Extension Schemes of OTFS.315.1 Multi-Antenna OTFS Scheme.315.1.1 Pilot Design for MIMO-OTFS.315.1.2 Low-Complexity and Low-Overhead OTFS Transceiver Based on Multi-Antenna Array.365.2 MultipleAccess Technology

5、Scheme Empowered by OTFS.415.2.1 Orthogonal Time-Frequency Code Domain Multiple Access Scheme.415.2.2 OTFS-SCMA System Based on MemoryApproximate Message Passing(MAMP)Algorithm.455.3 OTFS-Empowered Integrated Sensing and Communication(OTFS-ISAC)Scheme.515.3.1Advantages of OTFS-ISAC Scheme.515.3.2 OT

6、FS-ISAC Waveform Design.526.Evolution Schemes for OTFS.556.1 New Delay Doppler Domain Multicarrier Modulation Scheme.556.2 Fusion Frame Structure Design of OTFS and OFDM.577.Summary and Outlook.62References.64Participant Units.662/661.IntroductionOrthogonal frequency division multiplexing(OFDM)is a