Báo cáo hóa học: " Adaptive Zero-Padding OFDM over Frequency-Selective Multipath Channels" potx

... Exploiting channel knowledge for adaptive stre aming delivery s er- vices requires a means to measure adaptive streaming performance, which is discussed next. 3.1. Adaptive streaming Adaptive stre aming-based ... 2011:148 http://jwcn.eurasipjournals.com/content/2011/1/148 Page 5 of 12 RESEARCH Open Access Adaptive cognitive media delivery over composite wireless networks Tim Farnh...

Ngày tải lên: 20/06/2014, 22:20

... a d,j is the multipath gain coefficient and τ d,j is the delay of the dth multipath component (ray) relative to the jth cluster arrival time T j , J is the cluster number, and D is the multipath ... orthogonal frequency division multiplexing (OFDM) ultra-wideband (UWB) communication systems in multipath fading channels. This RR-WF-based algorithm employs an adaptive fuzzy-inference-...

Ngày tải lên: 20/06/2014, 22:20

... 12 RESEARC H Open Access Adaptive low-rank channel estimation for multi- band OFDM ultra-wideband communications Chia-Chang Hu * and Shih-Chang Lee Abstract In this paper, an adaptive channel estimation ... orthogonal frequency division multiplexing (OFDM) ultra-wideband (UWB) communication systems in multipath fading channels. This RR-WF-based algorithm employs an adaptive fuzzy-in...

Ngày tải lên: 21/06/2014, 00:20

... frequency selective multipath fading by transmit- ting signals over a number of flat-faded narrow-band chan- nels. The inherent multicarrier nature of OFDM also allows the use of adaptive modulation ... multiplexing (OFDM) is potentially suited for supporting high-speed downlink trans- mission as it can offer high spectral efficiency due to its ro- bust performance over heavily impaired...

Ngày tải lên: 22/06/2014, 22:20

... between PAR1 overexpression and metastases: all 23 of these patients overexpressed PAR1 (Table 1, Figure 2). Comparing this group with the group that did not develop metastases and did not overexpress ... cancer (Table 1, Figures 1, 2, 3). All patients with metastases overexpressed PAR1 (Figure 2). Moreover, the majority of our PAR1-overexpressing patients died during the course of this study...

Ngày tải lên: 18/06/2014, 15:20

... recovery of these s ubjects with respect to stroke survivors. While in stroke subjects recovery is driven by motor errors, in MS cerebellar subjects recovery may be triggered by the mere adaptive training, ... decreased significantly over sessions. Conclusions: The results point to an improved coordination over sessions and suggest a potential benefit of a short-term, customized, and a...

Ngày tải lên: 19/06/2014, 08:20

... (a) (b) (c) (d) (e) (f) (g) Figure 13 4.2 Adaptive estimation of missing high-frequency components In this subsection, we present an adaptive estimation of missing high-frequency components ... image becomes more difficult with increase in the amount of blurring [7]. 4 KPCA-based adaptive SR algorithm An adaptive SR method based on the KPCA with a novel texture classification approach is...

Ngày tải lên: 20/06/2014, 04:20

... M j values. Based on the recognized M j values, the reader ca n recover the original bit block B j values and store these recovered values (line s 20-23 of Figure 2). The reader then broad- cast ... and communication overhead compared to existing tree- based protocols. Our performance analysis and evalua- tion show that k-TAS is efficient in reducing tag colli- sions while preserving low comm...

Ngày tải lên: 20/06/2014, 22:20

... doi:10.1109/ TCOMM.2005.849774 doi:10.1186/1687-1499-2011-154 Cite this article as: Kim et al.: Adaptive selection of antenna grouping and beamforming for MIMO systems. EURASIP Journal on Wireless Communications ... correlated channel. This is why beamforming is the best strategy in a highly correlated channel. To overcome performance degradation in an ill-condi- tioned or a c orrelated cha...

Ngày tải lên: 20/06/2014, 22:20

... 6:623 http://www.nanoscalereslett.com/content/6/1/623 Page 7 of 10 NANO EXPRESS Open Access Stagnation-point flow over a stretching/shrinking sheet in a nanofluid Norfifah Bachok 1 , Anuar Ishak 2* and Ioan Pop 3 Abstract An ... analysis is carried out to study the steady two-dimensional stagnati on-point flow of a nanofluid over a stretching/shrinking sheet in its own plane. The stretchi...

Ngày tải lên: 20/06/2014, 23:20