# Directional Sparse Filtering for Blind Estimation of Under-Determined Complex-Valued Mixing Matrices

> Research article (IEEE Transactions on Signal Processing, 2020) · cited 14× · AI/ML

**Wikidata**: [openalex:W3011647582](https://www.wikidata.org/wiki/openalex:W3011647582)  
**Source**: https://4ort.xyz/entity/directional-sparse-filtering-for-blind-estimation-of-under-determined-complex-valued-mixing-matrices