# Enhancing the Robustness of Smartphone Photoplethysmography: A Signal Quality Index Approach

> Research article (Sensors, 2020) · cited 27× · AI/ML

**Wikidata**: [openalex:W3013274248](https://www.wikidata.org/wiki/openalex:W3013274248)  
**Source**: https://4ort.xyz/entity/enhancing-the-robustness-of-smartphone-photoplethysmography-a-signal-quality-index-approach