Báo cáo hóa học: " Adaptive Space-Time-Spreading-Assisted Wideband CDMA Systems Communicating over Dispersive " potx

... 2005:2, 216–230 c  2005 Hindawi Publishing Corporation Adaptive Space-Time-Spreading-Assisted Wideband CDMA Systems Communicating over Dispersive Nakagami-m Fading Channels Lie-Liang Yang School ... antennas, adaptive wireless systems, as well as wideband, broadband, and ultra -wideband code-division multi- ple access (CDMA) for advanced wireless mobile communication sy...

Ngày tải lên: 23/06/2014, 00:20

... RESEARCH Open Access Adaptive blind timing recovery methods for MSE optimization Wonzoo Chung Abstract This article presents a non-data-aided adaptive symbol timing offset correction ... propose a blind adaptive baseband timing recovery algorithm producing a timing offset close to the jointly optimal timing phase compared to other existing non-data-aided timing recovery methods. ... 201...

Ngày tải lên: 21/06/2014, 17:20

... newly proposed OV -CDMA system with existing multirate systems, Figure 3 shows the SIR comparison between the OV -CDMA and the classical VPG-FFH -CDMA systems while varying the transmission rate. The ... for the OV -CDMA system and when G s = 40 for the VPG FFH- CDMA system. The normalized transmission rate increases by increasing ε s or decreasing G s for the OV -CDMA and the VPG-...

Ngày tải lên: 21/06/2014, 22:20

... 10.1155/WCN/2006/16497 Editorial Ultra -Wideband Communication Systems: Technology and Applications Arne Svensson, 1 Arumugam Nallanathan, 2 and Ahmed Tewfik 3 1 Department of Signals and Systems, Chalmers University ... that both radio systems are severely de- graded by interference from the other systems. It is also shown that the interference is asymmetric due to the het- erogeneity...

Ngày tải lên: 22/06/2014, 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 ... frequency division multiplexing (OFDM) ultra -wideband (UWB) communication systems in multipath fading channels. This RR-WF-based algorithm employs an adaptive fuzzy-inference-c...

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 ... frequency division multiplexing (OFDM) ultra -wideband (UWB) communication systems in multipath fading channels. This RR-WF-based algorithm employs an adaptive fuzzy-inference-c...

Ngày tải lên: 21/06/2014, 00:20

... Toskala, WCDMA for UMTS, John Wiley & Sons, West Sussex, UK, 2000. [2] O. Yu, E. Saric, and A. Li, “Fairly adjusted multimode dynamic guard bandwidth admission control over CDMA systems, ” IEEE ... for WCDMA systems, ” IEEE Wireless Communications, vol. 9, no. 2, pp. 26–32, 2002. [4] L. Xu, X. Shen, and J. W. Mark, “Dynamic fair scheduling with QoS constraints in multimedia wideban...

Ngày tải lên: 22/06/2014, 22:20

... (dB) Multipath with adaptive filter Multipath without adaptive filter Direct path with adaptive filter Figure 8: Estimated BER curves of the IR -CDMA system showing the improvement due to the adaptive filter ... (dB) Multipath with adaptive filter Multipath without adaptive filter Direct path with adaptive filter Figure 9: Simulated BER curves of the IR -CDMA system showing the impro...

Ngày tải lên: 23/06/2014, 00:20

... 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