Abstract: Stations in a N×N multiple-input-multiple-output (MIMO) wireless network always puncture the weakest spatial channel. N?1 spatial channels are always used regardless of the channel state.
Abstract: Stations in an N×N multiple-input-multiple-output (MIMO) wireless network always puncture the weakest spatial channel. A receiving station determines channel state information for N spatial channels and feeds back to the transmitting station channel state information for only N?1 spatial channels. The channel state information may include a beamforming matrix to cause the transmitting station to utilize N?1 spatial channels.
Abstract: A method and apparatus is disclosed herein for wireless communication with adaptive beamforming. In one embodiment, the apparatus comprises a processor, a radio frequency (RF) transmitter having a digitally controlled phased array antenna coupled to and controlled by the processor to transmit content using adaptive beamforming, and an interface to a wireless communication channel coupled to the processor to communicate antenna information relating to the use of the phased array antenna and to communicate information to facilitate playing the content at another location.
Type:
Grant
Filed:
August 12, 2005
Date of Patent:
March 8, 2011
Assignee:
SIBEAM
Inventors:
Chinh H. Doan, Sohrab Emami-Neyestanak, John Marshall, Chuen-Shen Shung, Tim Arthur Williams, Robert W. Brodersen, Jeffrey M. Gilbert, Ada Shuk Yan Poon
Abstract: A system of the present application includes a first wireless communication device including a number of first device antenna elements, first device processing circuitry, and a first device transmitter to provide a wireless transmission of transmitter vectors corresponding to spatial filters. Also included is a second communication device with a number of second device antenna elements, a second device receiver to receive one or more signals corresponding to the wireless transmission of the transmitter vectors, and second device processing circuitry to generate receiver vectors corresponding to those signals. One or more of the first device and the second device is structured to determine angular spectrum as a function of the transmitter vectors, the receiver vectors, a transmit array manifold, and a receive array manifold.