On Thu, Nov 07, 2013 at 11:57:25PM -0800, coderman wrote:

On Thu, Nov 7, 2013 at 11:32 PM, coderman wrote:

...

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

let me clarify:

the hardware available for SDR MIMO development leaves much to be desired. ... the blocks and implementations for OFDM coding in software are OK :)

USRP N2X0 can do it, other setups require external reference clock with high fidelity. any recommendations for non-GPS clocks performing at 50-100ppb or better?

You don't need a global clock like GPS for MIMO, just a local high quality clock pulse to build a time base across multiple transceivers. ... unless I'm missing something? Nuand already has 2x2 MIMO by slaving one board to another's clock, and is developing a 4x4 MIMO clock distribution board. -andy