Patent ID: 8392785

Claim:
A transmitter for wireless communication comprising: a spatial mapping matrix to perform computations on a plurality of spatial data streams to generate a plurality of transmit data chains for radio frequency transmissions from a plurality of transmitting antennas; an antenna mapping circuit coupled to receive the plurality of the transmit data chains and to switch the data chains to corresponding one or more transmitting antennas; and wherein a sequence of sounding frames are to be transmitted from at least one of the antennas during an antenna selection procedure, in which a receiver that is operable to receive the sounding frames is to use the sounding frames in antenna selection during the antenna selection procedure, and wherein when the receiver identifies a failure of a reception of one of the sounding frames or when a prolonged delay occurs between two sequential sounding frames, the receiver to transmit back to the transmitter, a failure indication that includes a value corresponding to a frame number where the failure of reception or prolonged delay occurs in the sequence of sounding frames, to which the transmitter, upon receiving the failure indication from the receiver, retransmits sounding frames commencing from the frame number identified by the value for the sequence of sounding frames.