Báo cáo hóa học: " Multilevel LDPC Codes Design for Multimedia Communication CDMA System" docx

... unaffordable computational complexity for high-order constellations. To overcome such a problem, a second design method based on a rhombic transformation of a fixed alphabet of order K is proposed. It performs the optimization ... 2006. [4]D.P.Palomar,J.M.Cioffi, and M. A. Lagunas, “Joint Tx- Rx beamforming design for multicarrier MIMO channels: a unified framework for convex optimizatio...

Ngày tải lên: 21/06/2014, 08:20

... cross-layer design has been adopted. In short, the cross-layer methodology allows certain important information to influence decisions in a layer that is originally not defined to use that information (e.g., ... information at the link layer or the queue size at the baseband module). The motivation for this special issue is the observation that a cross-layer approach is particularly importa...

Ngày tải lên: 21/06/2014, 22:20

... allow communication over relay channels with no channel information [13–15]. Schemes are also available for multiple antennas [16]. Finally, distributed space-time codes have been consid- ered for ... nodes are used for one hop. We address the problem of code design when relay nodes may be used for more than one hop. We consider as a protocol a more elaborated version of amplify...

Ngày tải lên: 22/06/2014, 19:20

... the worst performing user for scenario 3, B PSK/QPSK mod- ulation and source rate of 100 kbps/200 kbps; (b) performance improvement for the three scenarios in forward mode; (c) performance improvement ... include the areas of smart/MIMO an- tenna systems, multiuser communications, signal processing for wireless communications, multimedia communications, commu- nication networks, resou...

Ngày tải lên: 22/06/2014, 22:20

... freely for any purposes (see copyright notice below). For information about publishing your research in Boundary Value Problems go to http://www.boundaryvalueproblems.com/authors/instructions/ For ... C(1 + curlu L ∞ (Ω) log(e + u H 3 (Ω) )) for any u ∈ H 3 (Ω) with divu = 0 in Ω and u · n = 0 on ∂Ω. 3 [5] Iftimie, D, Planas, G: Inviscid limits for the Navier–Stokes equations wi...

Ngày tải lên: 21/06/2014, 17:20

... freely for any purposes (see copyright notice below). For information about publishing your research in Boundary Value Problems go to http://www.boundaryvalueproblems.com/authors/instructions/ For ... Phys. 155, 277–294 (1993) [9] Shirota, T, Yanagisawa, T: A continuation principle for the 3D Euler equations for incompressible fluids in a bounded domain. Proc. Japan Acad. Ser. A69, 7...

Ngày tải lên: 21/06/2014, 20:20

... we have used the facts that fx, · / ≡ 0 for any x ∈ ∂Ω and w 1 y, t 1  > 0 for any y ∈ Ω, which is a direct result of the previous case. Therefore, the claim is true and thus t 1  T, ... 1and  Ω gx, ydy ≤ 1 for any x ∈ ∂Ω in Lemma 2.2, we can obtain w 1 ,w 2  ≥ 0, 0 in Q T under the assumption that w 1 x, 0,w 2 x, 0 ≥ 0, 0 for x ∈ Ω. Indeed, for any >0, we...

Ngày tải lên: 21/06/2014, 20:20

... 1993. [5]V.M.DasilvaandE.S.Sousa,“Multicarrierorthogonal CDMA for quasi-synchronous communication systems,” IEEE Journal on Selected Areas in Communications,vol.12,no.5,pp. 842–852, 1994. [6] X. Gui and T. S. Ng, “Performance of asynchronous ... by b k =  M−1  q=0 y qk = ⎧ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎨ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎩  M−1  q=0 α q w q,0 for k = 0...

Ngày tải lên: 22/06/2014, 22:20

... incorpo- rating 16-QAM non-uniform constellations. In this scheme there are 2 parallel processing chains, one for the basic infor- mation stream and the other for the enhancement informa- tion. 4. MACRODIVERSITY ... 3dB) Figure 12: BLER versus Tx power for 16-QAM strong and weak blocks of bits (SF = 32), k = 0.5. for VehA (actually the 90% coverage for weak bocks is not achievable...

Ngày tải lên: 22/06/2014, 22:20

... best performance, and decision tree performs almost as well. Note that the training data set for decision t ree is only 2/3 of the training data set used for the neural network and MLE. Therefore, ... proteins without domain information cannot provide any useful information for our prediction. Therefore, we ex- cluded the pairs where at least one of the proteins has no domain informatio...

Ngày tải lên: 22/06/2014, 23:20