On Thu, Nov 07, 2013 at 11:32:13PM -0800, coderman wrote: > On Thu, Nov 7, 2013 at 8:44 PM, David I. Emery <[email protected]> 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...
Ettus has some new lower-cost SDR boards that are getting approving glances from several of my radio-savvy friends: https://www.ettus.com/product/category/USRP-Bus-Series And the new kid on the block is Nuand BladeRF, with a half-the-cost design that seems pretty promising: https://nuand.com/ Both of these theoretically support MIMO, with clock distribution available as an added-cost option to sync up multiple boards' Tx/Rx. -andy
