Abstract

Multi-antenna radio front-ends generate a multi-dimensional flood of information, most of which is partially redundant. Redundancy is eliminated by dimensionality reduction. This class of operations presents harsh fundamental tradeoffs to contemporary digital processing techniques. These tradeoffs can be broken in the analog domain, in which the performance of optical technologies greatly exceeds that of electronic counterparts. Here, we present concepts, methods, and a first demonstration of multivariate photonics: a combination of integrated photonic hardware, analog dimensionality reduction, and blind algorithmic techniques. We experimentally demonstrate 2-channel, 1.0 GHz principal component analysis in a photonic weight bank using recently proposed algorithms for synthesizing the multivariate properties of signals to which the receiver is blind. Novel methods are introduced for controlling blindness conditions in a laboratory context. This work provides a foundation for further research in multivariate photonic information processing, which is poised to play a role in future generations of wireless technology.

Blind source separation with integrated photonics and reduced dimensional statistics

Philip Y. Ma, Alexander N. Tait, Weipeng Zhang, Emir Ali Karahan, Thomas Ferreira de Lima, Chaoran Huang, Bhavin J. Shastri, and Paul R. Prucnal
Opt. Lett. 45(23) 6494-6497 (2020)

Photonic principal component analysis using an on-chip microring weight bank

Philip Y. Ma, Alexander N. Tait, Thomas Ferreira de Lima, Siamak Abbaslou, Bhavin J. Shastri, and Paul R. Prucnal
Opt. Express 27(13) 18329-18342 (2019)

Photonic independent component analysis using an on-chip microring weight bank

Philip Y. Ma, Alexander N. Tait, Thomas Ferreira de Lima, Chaoran Huang, Bhavin J. Shastri, and Paul R. Prucnal
Opt. Express 28(2) 1827-1844 (2020)

Integrated random projection and dimensionality reduction by propagating light in photonic lattices

Mohammad-Ali Miri
Opt. Lett. 46(19) 4936-4939 (2021)

Sub-Nyquist optical pulse sampling for photonic blind source separation

Taichu Shi, Yang Qi, Weipeng Zhang, Paul Prucnal, Jie Li, and Ben Wu
Opt. Express 30(11) 19300-19310 (2022)