35 research outputs found
Ultra-Broadband AlGaN Amplifier Development; Northrop Grumman Quarterly Program Status Report
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Downlink multiuser MIMO methods for spatial diversity gain over a frequency flat or selective fading channel
No full textIn this paper, we propose a mechanism to achieve multi-user (MU) MIMO downlink spatial diversity gain for both frequency flat and selective fading channel. The MU interference is first cancelled by precoding the signal with the null space (basis) of other users' propagation space and then the diversity gain is achieved by using the dominant eigen transmission (DET) method on the composite space of the regular MIMO space and the MU interference null space. We prove both in theory and simulations that a diversity gain of an order equal to Nknk is achieved for MU MIMO, where Nk is the # of Rx antennas at the MS and nk is the rank of the MU interference null space. When nk > 1 and Nk= 1, DET reduces to transmit maximal ratio combining (TMRC). When nk= 1 and Nk > 1, DET reduces to receive MRC (RMRC). Selection combining (SC) can also be applied to MU SIMO or MU MISO.</p
Design Issues in a Fluid IP Core Generator
No full textOpen Restriction set for Item 110924 on 2019-05-16T18:49:18Z with date null by [email protected] by Michelle Self-Ballard ([email protected]) on 2019-05-16T18:52:07Z
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Previous issue date: 2003Open Restriction set for Item 110924 on 2019-11-12T19:29:40Z with date null by [email protected] Grumman Electric SystemsOpe
Tools for Large Graph Mining
No full textby a gift from Northrop-Grumman Corporation. The views and conclusions contained in this document are those of the author and should not be interpreted as representing the official policies, either expressed or implied, of any sponsoring institution, the U.S. government or any other entity
Parameter-Free Spatial and Stream Mining
No full textfunding was provided by donations from Intel, and by a gift from Northrop-Grumman Corporation. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation, DARPA, or other funding parties
Manufacturing Technology for High Voltage Power Supplies (HVPS). Volume IV. Reference Information.
No full textManufacturing Technology for High Voltage Power Supplies (HVPS). Volume II - Program Details.
No full textManufacturing Technology for High Voltage Power Supplies (HVPS). Volume I - Program Summary.
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