tài liệu digital marketing

Ngày tải lên: 14/02/2014, 14:20

Ngày tải lên: 14/02/2014, 14:20

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Ngày tải lên: 07/03/2014, 14:20

Ngày tải lên: 25/07/2013, 16:51

... permission of the Mobile Marketing Association, is strictly prohibited. Mobile Advertising Overview www.mmaglobal.com Mobile Marketing Association Version 408 © 2008 Mobile Marketing Association ... focused on the potential of marketing via mobile devices. www.mmaglobal.com Mobile Marketing Association Version 408 Page 8 Mobile Advertising Overview of 17 © 2008 Mobile Marketing Association • ... Pacific Text Link Graphic Banners www.mmaglobal.com Mobile Marketing Association Version 408 Page 6 Mobile Advertising Overview of 17 © 2008 Mobile Marketing Association • USA 1670 Broadway, Suite 850,...

Ngày tải lên: 09/12/2013, 23:15

... economic and social benefits, lessening both the International Digital Divide and the Domestic Digital Divide. The 13 th chapter is Digital Technologies and the Cross-Border Expansion of South African ... other products (digital or physical) to avoid some of the problems inherent in the pricing of digital products alone. Another pricing strategy is to create an artificial distinction within a subset of digital ... the introduction of the Internet into the marketing chan- nel as from the products’ very nature as digital products. This chapter examines the nature of digital products, their pricing issues,...

Ngày tải lên: 10/12/2013, 11:16

... người bán gọi là Marketing Marketing của người bán gọi là Marketing bán bán  Marketing của người mua gọi là Marketing của người mua gọi là Marketing mua Marketing mua Marketing được thực ... nhân viên Marketing Chương 1 MARKETING CĂN BẢN Quản trị Marketing QT sản xuất QT tài chính QT nhân sự Vị trí và vai trò của Quản trị Marketing Vị trí và vai trò của Quản trị Marketing ... Chương 1 MARKETING CĂN BẢN Marketing là gì? Marketing = Market + ing  Thuật ngữ Marketing hàm chứa những biện pháp năng động nhắm đến việc tác động vào một thị trường nào đó. Chương 1 MARKETING...

Ngày tải lên: 12/12/2013, 19:16

... 1992. c  1999 by CRC Press LLC Oppenheim, A.V. & Cuomo, K.M. “Chaotic Signals and Signal Processing” Digital Signal Processing Handbook Ed. Vijay K. Madisetti and Douglas B. Williams Boca Raton: CRC...

Ngày tải lên: 13/12/2013, 00:15

... 1996. [14] Pendergrass, N.A., Mitra, S.K. and Jury, E.I., Spectral transformations for two-dimensional digital filters, IEEE Trans. on Circuits and Systems, CAS-23(1), 26–35, Jan. 1976. [15] Wang, H....

Ngày tải lên: 13/12/2013, 00:15

... of a wireless digital communication system. 69.4 MMSE Beamformer for Mobile Communications In this section, we discuss the implementation of the MMSE beamformer in the context of a digital wireless ... Barroso, V.A.M. & Moura, J.M.F. “Beamforming with Correlated Arrivals in Mobile Communications” Digital Signal Processing Handbook Ed. Vijay K. Madisetti and Douglas B. Williams Boca Raton: CRC ... we describe a method to implement the minimum mean square error beamformer in the context of a digital mobile communications system. The method operates in a blind mode and strongly exploits...

Ngày tải lên: 13/12/2013, 00:15

... Blind equalization of digital communication channels using higher order moments, IEEE Trans. Acoust. Speech, Signal Processing, SP-39(2), 522–526, Feb. 1991. [34] Proakis, J.G., Digital Communications, McGraw-Hill, ... co-channel digital signals using antenna arrays with applications to PCS, in Proc. ICC’94, 700–794, 1994. [43] Talwar, S., Viberg, M. and Paulraj, A., Blind separation of synchronous co-channel digital signals ... algorithms. c  1999 by CRC Press LLC Finite Alphabet (FA) Method This approach exploits the FA property of the digitally modulated signals. Assuming no delay spread and perfect multi-user symbol synchronization,...

Ngày tải lên: 13/12/2013, 00:15

... , M− 1. c  1999 by CRC Press LLC Williams, D.B. “Detection: Determining the Number of Sources” Digital Signal Processing Handbook Ed. Vijay K. Madisetti and Douglas B. Williams Boca Raton: CRC...

Ngày tải lên: 13/12/2013, 00:15

... 1995. [35] Reddy, V.U., Mathew, G. and Paulraj, A., Some algorithms for eigensubspaceestimation, Digital Signal Processing, 5, 97–115, 1995. [36] Regalia, P.A. and Loubaton, P., Rational subspaceestimation...

Ngày tải lên: 13/12/2013, 00:15

... See[1,AppendixG]. Inourcase,CRB(θ 1 ,θ 2 ,θ 3 )isthe3×3upperleftblockentryoftheCRBmatrixinthesensor framegivenin[1,AppendixF].SubstitutingthisblockentryintoEq.(65.37)anddenotingtheCVAE matrixboundfortheSSTproblembyCVAE S CR ,wehavethatthismatrixisdiagonalwithnonzero entriesgivenby  CVAE S CR  1,1 = (1+) 2 2 cos 2 2θ 4 (65.40a)  CVAE S CR  2,2 = (1+)(σ 2 E +σ 2 H ) 2 2 [σ 2 H sin 2 θ 4 +σ 2 E cos 2 θ 4 ] (65.40b)  CVAE S CR  3,3 = (1+)(σ 2 E +σ 2 H ) 2 2 [σ 2 E sin 2 θ 4 +σ 2 H cos 2 θ 4 ] (65.40c) SomeobservationsonEqs.(65.40)aresummarizedinthefollowing: •Rotationaroundu:Singularonlyforacircularlypolarizedsignal. •Rotationaroundv 1 (electricellipse’smajoraxis):Singularonlyforalinearlypolarized signalandnomagneticmeasurement. •Rotationaroundv 2 (electricellipse’sminoraxis):Singularonlyforalinearlypolarized signalandnoelectricmeasurement. •Therotationvariancesaroundv 1 andv 2 aresymmetricwithrespecttotheelectricand magneticmeasurements. •AllthethreevariancesinEq.(65.40)areboundedfrombelowby(1+)/2 2 (inde- pendentofthewaveparameters). ThesingularcasesabovearefoundbycheckingwhentheirvariancesinCVAE S CR tendtoinfinity(see, e.g.,[25,Theorem6.3]).Thethreesingularcasesaboveshouldbeexpectedasthecorresponding rotationsareunobservable.ThesesingularitiesareintrinsictotheSSTestimationproblemand areindependentofthereferencecoordinatesystem.Thesymmetryofthevariancesoftherotations aroundthemajorandminoraxesoftheellipsewithrespecttothemagneticandelectricmeasurements shouldbeexpectedastheiraxeshaveaspatialangledifferenceofπ/2. c  1999byCRCPressLLC Nehorai, A. & Paldi, E. “Electromagnetic Vector-Sensor Array Processing” Digital Signal Processing Handbook Ed. Vijay K. Madisetti and Douglas B. Williams Boca Raton: CRC...

Ngày tải lên: 13/12/2013, 00:15

... a spatial frequency warping identical to the temporal frequency warping incurred in designing a digital filter from an analog filter via the bilinear transformation. Consider  = λ 2 so that µ i =− 2π λ ...

Ngày tải lên: 13/12/2013, 00:15

... P c  1999 by CRC Press LLC Gonen, E. & Mendel, J.M. “Subspace-Based Direction Finding Methods” Digital Signal Processing Handbook Ed. Vijay K. Madisetti and Douglas B. Williams Boca Raton: CRC ... in array signal process- ing, Signal Processing, 25(2), 147–169, Nov. 1991. [18] Marple, S.L., Digital Spectral Analysis with Applications, Prentice-Hall, Englewood Cliffs, NJ, 1987. [19] Mendel,...

Ngày tải lên: 13/12/2013, 00:15

... , (23.13) W ∞ = lim n→∞ E{W(n)} . (23.14) c  1999 by CRC Press LLC Williamson, G.A. “Adaptive IIR Filters” Digital Signal Processing Handbook Ed. Vijay K. Madisetti and Douglas B. Williams Boca Raton: CRC...

Ngày tải lên: 13/12/2013, 00:15

... frequency realization for FIR adaptive digital filters, IEEE Trans. Acoust., Speech, Signal Process., Vol. ASSP-31(5), 1073–1083, Oct. 1983. [2] Bellanger, M.G., Adpative Digital Filters and Signal Analysis, Marcel ... 1992. [16] Marshall, D.F., Computationally efficient techniques for rapid convergence of adaptive digital filters, Ph.D. dissertation, University of Illinois, Urbana-Champaign, IL, 1988. [17] Narayan, ... LLC TransformDomainAdaptive Filtering W.KennethJenkins UniversityofIllinois, Urbana-Champaign DanielF.Marshall MITLincolnLaboratory 22.1LMSAdaptiveFilterTheory 22.2OrthogonalizationandPowerNormalization 22.3ConvergenceoftheTransformDomainAdaptiveFilter 22.4DiscussionandExamples 22.5Quasi-NewtonAdaptiveAlgorithms AFastQuasi-NewtonAlgorithm • Examples 22.6The2-DTransformDomainAdaptiveFilter 22.7Block-BasedAdaptiveFilters ComparisonoftheConstrainedandUnconstrainedFre- quencyDomainBlock-LMSAdaptiveAlgorithms • Examples andDiscussion References Oneoftheearliestworksontransformdomainadaptivefilteringwaspublishedin1978byDentino etal.[4],inwhichtheconceptofadaptivefilteringinthefrequencydomainwasproposed.Many publicationshavesinceappearedthatfurtherdevelopthetheoryandexpandthecurrentunder- standingofperformancecharacteristicsforthisclassofadaptivefilters.Inadditiontothediscrete Fouriertransform(DFT),otherorthogonaltransformssuchasthediscretecosinetransform(DCT) andtheWalshHadamardtransform(WHT)canalsobeusedeffectivelyasameanstoimprovethe LMSalgorithmwithoutaddingtoomuchcomputationalcomplexity.Forthisreason,thegeneral termtransformdomainadaptivefilteringisusedinthefollowingdiscussiontomeanthattheinput signalispreprocessedbydecomposingtheinputvectorintoorthogonalcomponents,whicharein turnusedasinputstoaparallelbankofsimpleradaptivesubfilters.Withanorthogonaltransforma- tion,theadaptationtakesplaceinthetransformdomain,asitispossibletoshowthattheadjustable parametersareindeedrelatedtoanequivalentsetoftimedomainfiltercoefficientsbymeansofthe sametransformationthatisusedfortherealtimeprocessing[5,14,17]. AdirectformFIRdigitalfilterstructureisshowninFig.22.1.ThedirectformrequiresN−1 delays,Nmultiplications,andN−1additionsforeachoutputsamplethatisproduced.Theamount ofhardware(aswellaspower)requiredtoimplementthedirectformstructuredependsonthedegree ofhardwaremultiplexingthatcanbeutilizedwithinthespeeddemandsoftheapplication.Afully parallelimplementationconsistingofNdelayregisters,Nmultipliers,andatreeoftwo-inputadders wouldbeneededforveryhigh-frequencyapplications.Attheoppositeendoftheperformancespec- trum,asequentialimplementationconsistingofalengthNdelaylineandasingletimemultiplexed multiplierandaccumulationadderwouldprovidethecheapest(andslowest)implementation.This c  1999byCRCPressLLC results...

Ngày tải lên: 13/12/2013, 00:15