Re: sidebands of great justice [was: Meet “badBIOS,” the mysterious Mac and PC malware that jumps airgaps]

coderman coderman at gmail.com
Thu Nov 7 23:32:13 PST 2013


On Thu, Nov 7, 2013 at 8:44 PM, David I. Emery <die at dieconsulting.com> wrote:
> ... sending modulated tones over
> a speaker to a remote microphone is likely wickedly full of multipath
> ... Sound does
> not propagate all that fast compared to useful data rates after all.
>
>         So OFDM is good.


you can even run OFDM in 900Mhz with the Ubiquiti SR9 radios, oldies but goodies

combine MIMO with OFDM for even more multipath resistance and throughput.
 (MIMO audio channels ala dolby applied is amusing ;)



SDR MIMO kit leaves much to be desired, however...



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