The focus of this work is on the analysis of transmit beamforming schemes
with a low-rate feedback link in wireless sensor/relay networks, where nodes in
the network need to implement beamforming in a distributed manner.
Specifically, the problem of distributed phase alignment is considered, where
neither the transmitters nor the receiver has perfect channel state
information, but there is a low-rate feedback link from the receiver to the
transmitters. In this setting, a framework is proposed for systematically
analyzing the performance of distributed beamforming schemes.