3 ms·

This seems similar to what Artemis Networks has been working on, although they don't use the waves for computation but communication. https://www.artemis.com h

• JPLeRouzic 8y 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 8y 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 8y ago
      I 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 8y ago
      Holography 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.