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MIMO THP algrorithm massive
no vote
Application background The Design of ZF and MMSE in Precoding Tomlinson-Harashima Multiuser MIMO Amplify-and-Forward Relay System it is the described main MIMO system the in multi-user scenario.the precoding algrithm is combined the ZF precoding and the MMSE precoding. main On Key Technology Design a zero-forcing Tomlinson-Harashima (ZF) precoding and (THP) a minimum mean weError THP (MMSE) for multiuser MIMO relay system with direct link. Based on these we propose the optimal precoding weights combining the ZF THP of the and the MMSE structures of in THP duplex and system half MMSE relay the sub-optimal weights THP to reduce feedback information state channel we Through verify Monte the simulation Carlo outperforms we that the optimal weights combining method method. the constant InOf the sub-optimal weights combining method is close; to the optimal method while, reducing the feedbac
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Years of Shannon Theory Fifty
no vote
Application background Years of Shannon Theory Fifty:Brief chronicle is given of the historical development AThe central problems in the theory of fundamental limits ofData compression and reliable communication. of Key Technology S' A mathematical theory of in published communication July and October of Shannon 1948 isMagna Carta of the information age. Shannon s discoveryof the fundamental laws of and compression data transmission the the marks of birth Theory. Information data A unifying theory with profound intersections with Probability Statistics Computer Science other and fields Information Theory continues stage the to set of for theProcessing and, other information technologies. and
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Networks about Auburn University Femtocell
no vote
Application background Main described the Auburn; University Electrical and Computer Engineering and the theroy of the Moore Law s for Wireless described, the Qualcomm 1000x s Mobile Data Challenge. this Key Technology Cellular (residential) base stations Operate (FBS), by clients Deployed, connection to the Macro Base Station Internet (MBS), at a power of 20mW and up to meters 10 Provide, better indoor coverage SmallData from the macrocell. OffloadOf Wireless Engineering Bachelor (BWE):Program and The; first-of-its-kind in the nation. ABET-accredited
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Brief History of COMMUNICATIONS A
no vote
Application background Papers main describe the humans communacation; history from begin to future this, can summarised the 4G and, 3G, 2G, and his histoy and 1G; IEEE's contribution the, the communication soceity of presedents. this Key Technology & Recognitions:; Awards2009 - Vincent Poor H.2008 - Benedetto Sergio2007 - C. Beaulieu Norman2006 - J. Greenstein Larry2004 - Mouftah Hussein2003 - Sari Hikmet2002 - B. Pursley Michael2001 - Biglieri Ezio2000 - B. Milstein Laurence1999 - Gross Al1998 - L. Schilling Donald1997 - K. Simon Marvin1996 - Hagenauer Joachim1995 - Lender Adam1994 - Schwartz Mischa1993 - Schumate Paul1992 - Kaneko Hisashi1991 - R. Saltzberg Burton1990 - K. Wolf Jack1989 - E. Green Paul, Jr.1988 - M. Sipress Jack1987 - Baran Paul1986 - Ungerboeck Gottfried1985 - Charles Terreault Robert1984 - O. Evans Bob1982 - Sekimoto Tadahiro1981 - Price Robert1980 - T. Andrews Frederick1979 - A. Collins Arthur1978 - Pinet Andr
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Contamination Reduction Pilot
no vote
Application background Paper considers the problem of interference This in mitigation multi-cell multi-antenna time division duplex channel. wireless for downlink transmission. An efficient way to the systems channel obtain at state information base station is the by reciprocity uplink pilots andThe same time it, has been shown that pilots from different At high cells contaminate each other resulting in corruption used precoding of by matrices This base stations and inter-cell interference. frames paper studies the effects of shifting the location of pilots usedReduction. interference Key Technology Cellular network designs with multiple antennas Wireless have been adopted by several modern wireless systems which wireless aim for high throughput as well as high quality of s to service inter-cell a large users. of number With constant increase in the number of in users being served syste
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And challenges with very large arrays Opportunitie
no vote
Application background Price for pay is MIMO complexity increased the complexity the at complexity links and usually consumption ends.For than For the signal exponentially of nt. complexity is at example at at receiver transmitter. since alone detection signal the also grows concern coding advanced complexity often systems of a transmit In used optimal transmitter information be than to greater one the while level must simultaneously with to concern schemes a complexity is Key Technology Have also for cases detection algorithms surveyed where of number users single-antenna the and of number station base both antennas is about the numbers but e.g. same large the challenging are detection detector. this optimal are uplink becomes the The extremely We probl
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MIMO Fundamentals Opportunities, and Challenges ma
4.0
Application background Multiuser MIMO Massive (MISO):M by K by 1 (think 100 or 10 x 500 x 50)Coherent, but simple, processingPotential to dramatically improve rate & reliabilityPotential to drastically scale down TX powerNot only theory, at least one known testbed (64 * - 10) Key Technology MIMO Operation MassiveEnough resources for pilots & CSI; feedback so, operate in TDD. NotOn the uplink,Acquire CSI from uplink pilots and/or blindly from dataDetect symbolsM by K linear processing (MRC, ZF, MMSE) nearly optimalOn the downlink,Use CSI obtained on the uplinkMake necessary adjustments based on reciprocity calibrationApply multiuser MIMO precodingSimple precoders desirable (and very good!): MRT, ZF, MMSE,...MRC/MRT operationIntracell interference will appear as noise1 bps/Hz/terminal K bps/Hz/terminal total;Distributed implementationZF/MMSE operationCan cancel out intra cell interferenceComputationally more demanding
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MIMO massive
no vote
Application background Observe large differences over the array We Detailed study if received signals revealed that we had large variations over the array: A- power level received- scale fading distribution Small- power spectra angularImplies that the channel can not be seen as wide sense stationary over the large array which, has implications for This- Modeling- simulation- analysis theoretical The following analysis we use a element 10 window in, which we can assume that a plane wave assumption and WSSUS holds For Key Technology The studied realistic propagation environment we, have characteristics that allow for efficient use of very-large MIMO even, with less-complex Linear Precoding scheme In- the most case "difficult" studied closely, spaced users with LOS the, worst combination of cylindrical array with ZF reaches In 55% ideal performance of- other cases both, linear and cylindric
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GeneralizedMIMO
no vote
Application background This context an, communications may be allowed; to be commodity by most indispensable data and mobile video also well as television services are an essential as becoming introduction of of life. part the everyday the With operating iPhone and Android system the the success iPad readers as ebook the such and the Facebook networking demand social using the and for traffic data nbsp has grown significantly in recent& mobile mobile In data the on while Thus years. be transformational wireless the proven communications move to to has demands satisfy networks profitability. operators traffic struggle their cellular in costs cellular minimum to maintain at keeping of of use Key Technology A both profound paradigm of a and no the design during this entire critically stack. thecontext constitutes described communications and but MIMO In concept capacity technical a business
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MIMO about NYU massive
no vote
Application background Peer-to-Peer GHz 38 and 60 in Austin Texas 2011:Cellular (rooftop-to-ground)Cellular GHz 28 in New York City 2012:Cellular and Backhaul GHz 72 in New York City 2013:Capacity Analysis and Channel Models for 5G 2013: Key Technology Made at large range of receiver and transmitter angles Links- scatterers near both RX and TX when placed 1.5m above ManyGround- Beam-steering can help make several NLOS links Antenna- such, as brick Objects, reflect 38 better than GHz 60 due to lower GHzScattering. diffusive
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