Channel (broadcasting)

Multiplexing

Wireless

Algorithm

Frequency modulation

Modulation (music)

Aesthetics

Engineering

Philosophy

Electronic engineering

Cyclic prefix

Computer science

Transceiver

Orthogonal frequency-division multiplexing

Radio frequency

Telecommunications

IEEE Communications Letters

The fundamental concepts and challenges of orthogonal time frequency space (OTFS) modulation have been reviewed in Part I of this three-part tutorial. In this second part, we provide an overview of the state-of-the-art transceiver designs for OTFS systems, with a particular focus on the cyclic prefix (CP) design, window design, pulse shaping, channel estimation, and signal detection. Furthermore, we analyze the performance of OTFS modulation, including the diversity gain and the achievable rate. Specifically, comparative simulations are presented to evaluate the error performance of different OTFS detection schemes, and the advantages of coded OTFS systems over coded orthogonal frequency-division multiplexing (OFDM) systems are investigated.

Orthogonal Time Frequency Space Modulation—Part II: Transceiver Designs