Delay-Doppler Communications

Chapter 6: Detection methods

Abstract

In previous chapters, we derived the input–output relation for OTFS. The success of any waveform depends on the availability of efficient detectors at the receiver. This chapter will present different detectors for OTFS, analyze their performance, and evaluate them via numerical simulations.

Keywords

OTFS; Detector; Decoder; LMMSE; Message passing; MRC

Chapter Outline

• 6.1  Overview of OTFS input–output relation
• 6.2  Single-tap frequency domain equalizer
  • 6.2.1  Single-tap equalizer for RCP-OTFS
  • 6.2.2  Block-wise single-tap equalizer for CP-OTFS
  • 6.2.3  Complexity
• 6.3  Linear minimum mean-square error detection
  • 6.3.1  Delay-Doppler domain LMMSE detection
  • 6.3.2  Time domain LMMSE detection
  • 6.3.3  Complexity
• 6.4  Message passing ...