Báo cáo sinh học: " Research Article Time-Frequency Based Channel Estimation for High-Mobility OFDM Systems—Part II: Cooperative Relaying Case" pptx

... Journal on Image and Video Processing Volume 2010, Article ID 469563, 11 pages doi:10.1155/2010/469563 Research Article Feature -Based Image Comparison for Semantic Neighbor Selection in Resource-Constrained ... feature -based image compari- son algorithms and neighbor selection for Wireless Sensor Networks; Section 3 explains the proposed feature -based image comparison method;...

Ngày tải lên: 21/06/2014, 08:20

... channel estimation schemes for MIMO -OFDM trans- formed the problem of estimating overlapping channels in the estimation of multiple single-input single-output (SISO) OFDM channels. This was achieved ... and Networking Volume 2010, Article ID 764784, 13 pages doi:10.1155/2010/764784 Research Article Effects of Channel Estimation on Multiuser Virtual MIMO-OFDMA Relay -Base...

Ngày tải lên: 21/06/2014, 11:20

... estimate the CFO and channel for the uplink of multiuser MIMO -OFDM systems in frequency selective fading channels. An asymptotic Cramer- Rao bound for joint CFO and channel estimation in the uplink ... we showed that for collocated MIMO -OFDM systems, using CAZA C sequences as training s equences reduces overhead for channel estimation while achieving Cramer Rao Bound (CR...

Ngày tải lên: 21/06/2014, 05:20

... implies g   t  > 0 3.9 for t>1. Therefore, ft > 0 follows from 3.5–3.7 and 3.9. If α ∈ 2/3, 1, then 3.8 leads to g   t  < 0 3.10 for t>1. Therefore, ft > 0 follows ... of Inequalities and Applications Volume 2010, Article ID 578310, 11 pages doi:10.1155/2010/578310 Research Article An Optimal Double Inequality for Means Wei-Mao Qian an...

Ngày tải lên: 21/06/2014, 07:20

... on Advances in Signal Processing Volume 2010, Article ID 575817, 8 pages doi:10.1155/2010/575817 Research Article Point Spread Function Estimation for a Terahertz Imaging System Dan C. Popescu ... support. Here we propose an approach for calculating the PSF based on the imaging of phantom objects designed to take advantage of the imaging system characteristics. Before explaining...

Ngày tải lên: 21/06/2014, 08:20

... Cramer-Rao lower bound (CRLB) for either the frequency offsets or channel estimation variance errors for MIMO -OFDM is derived. More documents on MIMO -OFDM channel estimation by considering the ... consider SISO -OFDM. The BER is degraded due to the frequency offset and channel estimation errors. For a fixed channel estimation variance error σ 2 ΔH , a larger variance of...

Ngày tải lên: 21/06/2014, 11:20

... location -based routing algorithms in WSNHA. The location information of all the sensor nodes in WSNHA can be stored. This makes location -based routing most suitable for WSNHA. Location -based routing ... information, greedy forwarding is guaranteed to be loop-free. The second type of location -based routing is the grid- based routing algorithm, which divides the network into many sm...

Ngày tải lên: 21/06/2014, 05:20

... transposed direct form II. When γ i = 1, Δ i = Δ (1 i n), one gets the δ transposed direct form II. This form was first proposed as an unification for the shift-direct form II transposed and the δ-direct form ... lowest magnitude is too high, then underflows occur for t he lowest coefficients that cannot be represented. For example, t his is common for the Direct Form realizations with hig...

Ngày tải lên: 21/06/2014, 09:20

... Processing Volume 2011, Article ID 918046, 12 pages doi:10.1155/2011/918046 Research Article Iterativ e S uccessive Interference Cancellation for Quasi-Synchronous Block Spread CDMA Based on the Orders ... →m −1  l=0 l  i=0 |h b ( i ) | 2 ⎤ ⎦ . (25) The SINR for quasi-synchronous BS-CDMA can, therefore, be computed for given channel statistics by substituting (11), (15), (25...

Ngày tải lên: 21/06/2014, 09:20

... thousands of devices) and perform efficient data access and queries, for example, for accessing device properties, for querying for devices that match certain requirements, or for estimating their interoperability. ... beneficial for ontologies. Compared to databases, however, ontologies rely on a different underlying data model, namely, RDF. In RDF, all information is represented in...

Ngày tải lên: 21/06/2014, 11:20