1. when you mention 7 V and 7 H chain, does it mean 7 Dual polarized (V/H) RFIC
each with it's own PA/LNA/Filters etc and all signal from the multiple RF chains are processed in the
digital domain of baseband
Yes, exactly that :)
2. What will be the expected size for 3 GHz
I can’t give concrete answers on the 3GHz product at this stage. If it were a simple like-for-like reimplementation of the 5GHz PMP450, you could imagine that the dimensions would be larger by the ratio of the wavelengths. But that’s a big “if”, because there are many other possible configurations that we might explore with different tradeoffs of performance against size.
3. Can multiple PMP450m base node in the vicinty use the same frequency channel
Yes, you will be able to use the PMP450m with TDD synchronisation exactly as you do with the 450 AP now. I may have misinterpreted the question, though. Just to be clear, we will not be able to support deployments where one SM can see multiple PMP450m APs on the same frequency.
4. How is the EIRP and Tx power per spatial link calculated ?
PMP450m has an integrated antenna as the only option, and Tx power is managed internally by the unit. The limits on EIRP are set by regulations and the PMP450m will of course comply with those.