Patent ID: 8249513

Claim:
A method of training antennas for two devices having different types of directional antennas in a wireless network, the method comprising: a) transmitting a first estimation training sequence of length N1, wherein N1 corresponds to a number of antenna elements at a first station (STA1) acting as a transmitter and wherein a transmit directional antenna of STA1 is switched between N1 transmit directions while a receive directional antenna of a second station (STA2) acting as a receiver is fixed to a first receive direction; b) transmitting a next estimation training sequence, wherein the transmit directional antenna is switched between N1 transmit directions while the receive directional antenna is fixed to a new receive direction; c) repeating b) for N2—2 more times, wherein N2 corresponds to a number of antenna elements at the receiver; and d) receiving a feedback message indicative of a directional information that is selected based at least in part on the transmitted estimation training sequences.