Báo cáo hóa học: " Research Article Constellation Design for Widely Linear Transceivers" doc

... constellation exhibiting, therefore, an unaffordable computational complexity for high-order constellations. To overcome such a problem, a second design method based on a rhombic transformation of a fixed ... are accounted for, the optimum degree of noncircularity of the constellation becomes depen- dent on the specific channel impulse response. Therefore, we address the constellation...

Ngày tải lên: 21/06/2014, 08:20

... bit/s/Hz for an optimally designed three-element array with uniform spacing 3.6 λ); (iii) compared to the λ/2-uniformly spaced ar- ray, optimizing the antenna spacings leads to a performance gain ... coincide for the con- sidered scenarios (Section 5). More importantly, it is veri- fied that substantial performance gain with respect to con- ventionally designed linear antenna arrays (i.e...

Ngày tải lên: 22/06/2014, 19:20

... Corporation EURASIP Journal on Advances in Signal Processing Volume 2008, Article ID 457307, 12 pages doi:10.1155/2008/457307 Research Article Code Design for Multihop Wireless Relay Networks Fr ´ ed ´ erique Oggier ... 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 elaborat...

Ngày tải lên: 22/06/2014, 19:20

... 2007, Article ID 64521, 10 pages doi:10.1155/2007/64521 Research Article A Workbench for the BOWS Contest Andreas Westfeld Instititute for System Architecture, De partment of Computer Science, ... for statistical computing. This paper presents the BOWS package, an extension for R, along with examples for using this experimental environment. The BOWS package provides an offline d...

Ngày tải lên: 21/06/2014, 22:20

... Rayleigh fading for each path. The system parameters are N t = M = 100 for all cases; for PAM-16, K = 16, N r = 13; for PAM-8, K = 6, N r = 6; for PAM-4, K = 8 with N r = 9, and for PAM-2, K = ... (i) for higher-order modulations we group B data streams together which will form a 2 B -ary PAM sym- bol. This is done as follows: the antenna sequence partitions s k,m for the data...

Ngày tải lên: 21/06/2014, 22:20

... varies for different construction algorithms. Some intuition as to why UEP code design may increase the average performance can be gained by considering irregular LDPC codes, not designed for UEP, ... rates for a finite length than the degree distributions with the best possible threshold. Well-designed UEP codes have faster convergence for all protection classes and thereby better pe...

Ngày tải lên: 21/06/2014, 11:20

... Video Processing Volume 2009, Article ID 716160, 16 pages doi:10.1155/2009/716160 Research Article Augmented Reality for Art, Design and Cultural Heritage—System Design and Evaluation Jurjen Caarls, 1 Pieter ... projects Visualization Techniques for Art and Design (2006-2007) and Interactive Visualization Techniques for Art and Design (2007–2009). The authors thank all art...

Ngày tải lên: 21/06/2014, 20:20

... Journal on Advances in Signal Processing Volume 2008, Article ID 574784, 12 pages doi:10.1155/2008/574784 Research Article A Design Framework for Scalar Feedback in MIMO Broadcast Channels Ruben ... information (CDI) based on a predetermined codebook and a scalar metric with channel quality information (CQI) used to perform user scheduling. In this paper, we present a design frame...

Ngày tải lên: 22/06/2014, 06:20

... optimal design of uni- form linear arrays (ULAs) with respect to mutual informa- tion (MI) [8, 9], and have given a simple equation for the optimal design. Furthermore, some work on the design ... pages doi:10.1155/2007/45084 Research Article Optimal Design of Uniform Rectangular Antenna Arrays for Strong Line-of-Sight MIMO Channels Frode Bøhagen, 1 P ˚ al Or ten, 2 and Geir...

Ngày tải lên: 22/06/2014, 19:20

... (QoS). A performance comparison of sev- eral scalar metrics for scheduling is provided in [17] for sys- tems with zero-forcing beamforming (ZFBF) transmission. In this paper, we present a design framework ... information (CDI) based on a predetermined codebook and a scalar metric with channel quality information (CQI) used to perform user scheduling. In this paper, we present a design...

Ngày tải lên: 22/06/2014, 19:20