Hi,
Is anybody know how and at which step of signal transmission
(practically) beamforming is done in case of AAS.
I found many do***ents explaining how it's possible to discriminate
users, sometimes with exemples of algorithms to determine direction of
arrival,.. but I still don't understand how it can works
practically :
_ Is this method used in uplink and downlink ? In uplink, system
should determine from which direction comes from the signal but in
emission ??
_ Tx : from exemple in 3G networks, each timeslots (10ms and soon 2ms)
can be affected to a different user => this imply diagram should be
changed at each period ? (it seems to me so.. short..)
_ Rx : it's even more difficult, several users can transmit at the
same time => how the system will decide which direction should be
privileged ? These beamforming operation should lead to many delays,
no ?
Thanks,
FreD.
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