# Channel Feedback Based on AoD-Adaptive Subspace Codebook in FDD Massive MIMO Systems

> Research article (IEEE Transactions on Communications, 2018) · cited 115× · AI/ML

**Wikidata**: [openalex:W2604698298](https://www.wikidata.org/wiki/openalex:W2604698298)  
**Source**: https://4ort.xyz/entity/channel-feedback-based-on-aod-adaptive-subspace-codebook-in-fdd-massive-mimo-systems