# Two-Stage Beamformer Design for Massive MIMO Downlink By Trace Quotient Formulation

> Research article (IEEE Transactions on Communications, 2015) · cited 100× · AI/ML

**Wikidata**: [openalex:W1902678874](https://www.wikidata.org/wiki/openalex:W1902678874)  
**Source**: https://4ort.xyz/entity/two-stage-beamformer-design-for-massive-mimo-downlink-by-trace-quotient-formulation