1
Qinghua Li, Xintian E Lin, Adrian P Stephens, Keith Holt, Eldad Perahia: Efficient training schemes for MIMO based wireless networks. Intel Corporation, Thorpe North & Western, September 28, 2010: US07804800 (47 worldwide citation)

Schemes are disclosed for efficiently training MIMO channels in wireless networks. In at least one embodiment, multiple STAs in a network may share a single channel sounding packet to develop corresponding beamforming matrices or CSI.


2
Qinghua Li, Xintian E Lin, V Srinivasa Somayazulu, Minnie Ho: Downlink resource allocation and mapping. Intel Corporation, Schwabe Williamson & Wyatt P C, October 18, 2011: US08041362 (44 worldwide citation)

Embodiments of the present invention provide for downlink resource allocation among a plurality of users. Other embodiments may be described and claimed.


3
Qinghua Li, Xintian E Lin: Downlink transmit beamforming. Intel Corporation, Dana B Lemoine, Lemoine Patent Services PLLC, May 18, 2010: US07719993 (40 worldwide citation)

A wireless network access point can operate as a closed loop MIMO device when communicating with a station that is operating as an open loop MIMO device. Transmit/receive chains in the access point are calibrated to support aggregate channel reciprocity.


4
Qinghua Li, Xintian E Lin, Alexei V Davydov: Broadband multicarrier transmitter with subchannel frequency diversity for transmitting a plurality of spatial streams. Intel Corporation, Schwegman Lundberg & Woessner P A, Gregory J Gorrie, November 10, 2009: US07616704 (37 worldwide citation)

A multicarrier transmitter assigns for each of a plurality of spatial channels, sets of the constellation symbols to subcarriers of each subchannel. Constellation symbol assignments to the subchannels are circularly rotated among some of the spatial channels so that subchannels use different sets of ...


5
Qinghua Li, Guangjie Li, Xintian E Lin: Aggregated channel feedback. Intel Corporation, Schwabe Williamson & Wyatt P C, August 17, 2010: US07778599 (36 worldwide citation)

Embodiments of methods and apparatus for providing aggregated feedback from a subscriber station to a base station are generally described herein. Some embodiments may include a channel response predictor to predict channel responses for future feedback periods and a feedback information generator t ...


6
Xintian E Lin, Qinghua Li: Beamforming codebook generation system and associated methods. Intel Corporation, August 17, 2010: US07778826 (33 worldwide citation)

A codebook generation system and associated methods are generally described herein. For instance, a codebook generation agent (CGA) may implement techniques for generating one or more matrix codebooks from vector codebooks. The CGA may be implemented in mobile devices (e.g., stations, subscriber uni ...


7
Qinghua Li, Xintian E Lin: Interpolation in channel state feedback. Intel Corporation, Dana B Lemoine, Lemoine Patent Services PLLC, May 26, 2009: US07539253 (32 worldwide citation)

Feedback bandwidth may be reduced in a closed loop MIMO system by Householder transformations, vector quantization using codebooks, and down-sampling in the frequency domain. A column of a beamforming matrix is quantized using a codebook, a Householder reflection is performed on the beamforming matr ...


8
Sumeet Sandhu, Qinghua Li: Method and apparatus for transmitting wireless signals on multiple frequency channels in a frequency agile network. Intel Corporation, The Law Offices of John C Scott, May 2, 2006: US07039412 (32 worldwide citation)

A mixed data unit for use in a wireless network may include a first portion having information that is coded over a single frequency channel and a second portion having information that is coded across multiple frequency channels. In at least one embodiment, the first portion includes duration relat ...


9
Qinghua Li, Guangjie Li, Xintian E Lin, Minnie Ho: Providing CQI feedback to a transmitter station in a closed-loop MIMO system. Intel Corporation, Schwabe Williamson & Wyatt P C, July 6, 2010: US07751368 (32 worldwide citation)

Methods and apparatuses for reducing an amount of bandwidth required for feedback to a transmitter station in a closed-loop multiple-input multiple-output (MIMO) system are described herein. The methods may include initially measuring at a receiver station channel qualities associated with receiving ...


10
Xintian E Lin, Qinghua Li: Beamforming codebook generation system and associated methods. Intel Corporation, February 22, 2011: US07895044 (30 worldwide citation)

A codebook generation system and associated methods are generally described herein. For instance, a codebook generation agent (CGA) may implement techniques for generating one or more matrix codebooks from vector codebooks. The CGA may be implemented in mobile devices (e.g., stations, subscriber uni ...