Re:300Mps On Its Own Is Meaningless (Score 1)

I've done a PhD in wireless OFDM technology, and there is no way they could be achieving 15 bps/Hz using conventional OFDM. The signal to noise ratio and multipath of a wireless environment is to harsh. At the efficiency levels they are describing they must be using some kind of MIMO (multiple input multiple output) technology. This is eluded to in the article in the fact that they are using multiple antennas.

MIMO allows multiple channels to be transmitted over the same bandwidth by expoiting spacial diversity generated by having multiple antennas, and a multipath environment.

With MIMO technology each channel is actually operating at a lower bps/Hz, and so can cope with the harsh conditions of a wireless environment. For example if I have 5 antennas I can get a maximum of 5 channels (in practice it would probably be about 2-3 channels), where each would only need to transmit at 3 bps/Hz.