Báo cáo hóa học: "Research Article Efficient Feedback via Subspace-Based Channel Quantization for Distributed Cooperative " ppt

... Processing Volume 2008, Article ID 847296, 13 pages doi:10.1155/2008/847296 Research Article Efficient Feedback via Subspace-Based Channel Quantization for Distributed Cooperative Antenna Systems with ... of SINR for MS1, 3BS-2MS case (ZF), R cell = 600 m,Urban Macro10 m/s Figure 4: Performance comparison of channel quantization models (4bCDI: 4-bit -channel direct...

Ngày tải lên: 22/06/2014, 06:20

... Communications and Networking Volume 2011, Article ID 935457, 11 pages doi:10.1155/2011/935457 Research Article Efficient Public Key Certificate Management for Mobile Ad Hoc Networks P. Caballero-Gil ... MANETs are described before introducing some new ideas that conform our proposal. We may find two main alternatives for the deployment of PKIs in MANETs in the bibliography: distribut...

Ngày tải lên: 21/06/2014, 11:20

... which is depicted in Figure 8. Form Figure 8 we observe that the appr.I inference has a much higher KL divergence, averaging at 0.3933 for forward pass and 1.1727 for backward, than that of the ... appr.II inference, averaging at 0.0127 for forward pass and 0.0129 for backward. Moreover, the KL divergence of appr.I inference has much more spikes than that of appr.II, both in forward a...

Ngày tải lên: 21/06/2014, 05:20

... Advances in Signal Processing Volume 2011, Article ID 646134, 8 pages doi:10.1155/2011/646134 Research Article Efficient Dispersion Generation Structures for Spring Reverb Emulation Julian Parker Department ... filters, and, therefore, are ignored for the purpose of this work. 3. Efficient Dispersion Generating Structures 3.1. Chirp Straightening. In this section we describe a method...

Ngày tải lên: 21/06/2014, 05:20

... the compensation of the channel dis- tortion. Once the IQ imbalance parameters are known, a standard channel equalizer can then be applied to estimate and compensate for channel variations in the ... BER 10 −1 10 0 123 Channel taps BER versus channel tap length for 16QAM OFDM at SNR = 20 dB 45 Ideal case D-FEQ with Rx compensation D-FEQ with Tx-Rx compensation (a) BER versus ch...

Ngày tải lên: 21/06/2014, 08:20

... for network planning or for coarse studies to understand the interrelations of new features, for example, heterogeneous networks [12]. In this work we will present the theoretical framework for ... Wireless Communications and Networking Volume 2010, Article ID 282465, 15 pages doi:10.1155/2010/282465 Research Article Efficient Uplink Modeling for Dynamic System-Level Simulation...

Ngày tải lên: 21/06/2014, 11:20

... therefore, it requires high CPU and memory capabilities to p erform exponential operations. Unfortunately, mobile nodes with limited resources have insufficient power to handle the overhead. Therefore, ... and Networking Volume 2011, Article ID 382701, 15 pages doi:10.1155/2011/382701 Research Article Efficient Key Agreements in Dynamic Multicast Height Balanced Tree for Secure Multicast...

Ngày tải lên: 21/06/2014, 11:20

... Wireless Communications and Networking Volume 2010, Article ID 195910, 13 pages doi:10.1155/2010/195910 Research Article Efficient Vector-Based Forwarding for Underwater Sensor Networks Peng Xie, 1 Zhong ... the node holds the packet before forwarding it. We modify Definition 1 and get a new definition of the desirableness factor for HH-VBF. Definition 3. For a candidate forwarder F,...

Ngày tải lên: 21/06/2014, 17:20

... (DSLs). Since the wired channel is slowly time-varying, the receiver can provide reliable channel state information to the transmitter using robust feedback channel. Therefore, adaptively loading ... the feedback channel information. On the other hand, little effort has been made to design effi- cient protocols for bit loading in wireless networks. Design- ing an efficient protocol is...

Ngày tải lên: 21/06/2014, 17:20

... 1 Rx User K Rx 1 N Feedback channel Feedback channel Figure 1: Block diagram of an MU-MIMO downlink. A quasistatic Rayleigh flat fading model is assumed for the channel where the channel gains do ... selection for MIMO broadcast channels,” IEEE Transactions on Information Theory, vol. 54, no. 3, pp. 1086–1107, 2008. [26] M. Eslami and W. A. Krzymie ´ n, “Scheduling for MIMO b...

Ngày tải lên: 21/06/2014, 17:20