Báo cáo hóa học: " Adaptive Iterative Soft-Input Soft-Output Parallel Decision-Feedback Detectors for Asynchronous Coded " pdf

... Hindawi Publishing Corporation Adaptive Iterative Soft-Input Soft-Output Parallel Decision-Feedback Detectors for Asynchronous Coded DS-CDMA Systems Wei Zhang School of Information Technolog y and ... detection, adaptive multiuser detection, parallel decision-feedback de- tection, adaptive soft-input soft-output parallel decision-feedback detection, asynch...

Ngày tải lên: 23/06/2014, 00:20

... algorithm performs better than the antenna grouping and the transmit beamforming methods in various channel conditions. Endnote a In this article, the beamforming mode refers to the transmit beamforming ... 256-QAM in the beamforming mode. In the high SNR region, the M1 algor ithm has the best BER perfor- mance, and the others have similar performance. The pro- posed algorithm (M5) has perfor...

Ngày tải lên: 20/06/2014, 22:20

... resort to a simple stochastic gradient method for updating the beamformers. 4.1 Stochastic gradient algorithm for beamformer update The algorithm for the beamformer update is a generali- zati on of ... performance requireme nt in order to guar- antee that the actual performance of the selected sub- set meets the requirement with minimum number of selected antenna. Performance of adapti...

Ngày tải lên: 21/06/2014, 01:20

... Provisional PDF corresponds to the article as it appeared upon acceptance. Fully formatted PDF and full text (HTML) versions will be made available soon. Adaptive access and rate control of CSMA for ... distributed freely for any purposes (see copyright notice below). For information about publishing your research in EURASIP WCN go to http://jwcn.eurasipjournals.com/authors/instru...

Ngày tải lên: 21/06/2014, 17:20

... takes a ran- dom value according to a uniform distribution. It re- tains this value for the duration of interval n. Without any loss of generality, the four aforementioned nonstation- ary Poisson ... arrival process Poisson, uniform range: 0 ≤ λ 1 ≤ 0.4 · η T Class 2 arrival process Poisson, uniform range: 0 ≤ λ 2 ≤ 0.3 · η T Class 3 arrival process Poisson, uniform range: 0 ≤ λ 3 ≤ 0.38 ·...

Ngày tải lên: 22/06/2014, 22:20

... several sessions in the programme were ded- icated to this important topic, where the need for more focused efforts was recognized. This topic will also be addressed at the International AIDS Conference ... AIDS Society 2009, 12:26 http://www.jiasociety.org/content/12/1/26 Page 2 of 2 (page number not for citation purposes) ity and equal opportunity, are among the guiding princi- ples of...

Ngày tải lên: 20/06/2014, 08:20

... replaced with their stan- dard forms (form 1 in Table 4) • Different encodings of a specific character are changed to a unique form. For example, all letters ‘ye’ that are encoded by U+0649 and U+064A ... parameters have been optimized for real applications of the Persian language. For this purpose, we had to identify the computational challenges of the Persian language, especially for...

Ngày tải lên: 20/06/2014, 22:20

... improvement of the performances can be obtained. Note that, the performance reported in the figures for the cooperative architecture can be considered as an upper bound for the performances of such ... exchanged information the smaller is the quantity of redundant data for minimizing the channel detrimental effects (and then the impact on the control channel capacity). For these reasons...

Ngày tải lên: 21/06/2014, 05:20

... objects. For virtual environments we require a minimal set of resonators that can be easily adapted to a wide variety of sounds and that are efficient. The earliest forms of resonator used for this ... that for instance a large plate of metal can be used to create echoes and reverberation. For less dense, more damped material such as wood, noticeable diffuse resonance occurs at modest si...

Ngày tải lên: 21/06/2014, 07:20

... the lowest thermal expansio n coefficient (23.1 × 10 -6 /°C for Al, 18.9 × 10 -6 /°C for Ag, 14.2 × 10 -6 /°C for Au, 0.55 × 10 -6 /°C for SiO 2 ), which will reduce the thermal destruction of ... gold and the fiber silica surface. Gold has a high melting temperature (660°C for Al, 960°C for Ag, and 1,060°C for Au) and a good thermal resistance. The thermal stress generated duri...

Ngày tải lên: 21/06/2014, 08:20