Abstract
The first two parts of this tutorial on orthogonal time frequency space (OTFS) modulation have discussed the fundamentals of delay-Doppler (DD) domain communications as well as some advanced technologies for transceiver design. In this letter, we will present an OTFS-based integrated sensing and communications (ISAC) system, which is regarded as an enabling technology in next generation wireless communications. In particular, we illustrate the sensing as well as the communication models for OTFS-ISAC systems. Next, we show that benefiting from time-invariant DD channels, the sensing parameters can be used for inferring the communication channels, leading to an efficient transmission scheme. As both functionalities are realized in the same DD domain, we briefly discuss several promising benefits of OTFS-based ISAC systems, which have not been completely unveiled yet. Finally, a range of potential applications of OTFS for the future wireless networks will be highlighted.
| Original language | English |
|---|---|
| Pages (from-to) | 14-18 |
| Number of pages | 5 |
| Journal | IEEE Communications Letters |
| Volume | 27 |
| Issue number | 1 |
| Early online date | 26 Sept 2022 |
| DOIs | |
| Publication status | Published - Jan 2023 |
| Externally published | Yes |
Funding
This work is supported in part by National Natural Science Foundation of China under Grant 62101232, and in part by the Guangdong Provincial Natural Science Foundation under Grant 2022A1515011257. The work of R. Schober and G. Caire is supported by BMBF Germany in the program of “Souverän. Digital. Vernetzt.” Joint Project 6G-RIC (Project IDs 16KISK030 and 16KISK023).
Keywords
- delay-Doppler domain
- integrated sensing and communications (ISAC)
- OTFS