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Hi, I admit that when I read your comment, I wondered what it has to do with the Ars article. In fact after thinking a bit I think you may have better understoo
by JPLeRouzic 9y ago
Hi, I admit that when I read your comment, I wondered what it has to do with the Ars article. In fact after thinking a bit I think you may have better understood the Arxiv article than the guy at Ars.
Indeed the point of the Arxiv article is not about doing computations, it is about Time Reversal/Wave front shaping.
The original contribution of the authors seems to be in infering the matrix to do beam forming simply from CSI in any random environment.
Citation: "We have demonstrated experimentally that any disordered medium can be employed as reconfigurable analogue computation unit, subject to appropriate wavefront shaping"
- marshray 9y ago> beam forming simply from CSI in any random environment Isn't this basically holography, just using a few discrete antennae rather than an (approximately) continuous film medium?
- JPLeRouzic 9y agoI have a good understanding of Wavefront shaping but holography is out of my comfort area. I DDG a bit and found that "The difference between a hologram and a conventional photograph is that conventional photography records intensity of light while a hologram records both intensity and phase." So maybe...
- SiempreViernes 9y agoHolography is about encoding a high dimensional (3d) structure in a lower (2d) dimensional plane, that this done by cleverly modifying a wavefront is mostly to do with light being waves.