# Delay-Doppler and Angular Domain 4D-Sparse CSI Estimation in OTFS Aided MIMO Systems

> Research article (IEEE Transactions on Vehicular Technology, 2022) · cited 45× · AI/ML

**Wikidata**: [openalex:W4295789425](https://www.wikidata.org/wiki/openalex:W4295789425)  
**Source**: https://4ort.xyz/entity/delay-doppler-and-angular-domain-4d-sparse-csi-estimation-in-otfs-aided-mimo-systems