Báo cáo hóa học: " Research Article Multimode Transmission in Network MIMO Downlink with Incomplete CSI" pdf

... Journal on Advances in Signal Pr ocessing Volume 2011, Article ID 743916, 13 pages doi:10.1155/2011/743916 Research Ar ticle Multimode Transmission in Network MIMO Downlink with Incomplete CSI Nima ... downlink transmission. The following are the keyassumptionsmadeinthispaper. Assumption 1. All the B cooperating BSs are interconnected via a central unit with the use...

Ngày tải lên: 21/06/2014, 09:20

... found using the duality of the MAC/BC and iterative water-filling [1]. 3.2. Linear transmit precoding Linear transmit precoding, or beamforming, is a technique that uses linear preprocessing to ... Corporation EURASIP Journal on Advances in Signal Processing Volume 2008, Article ID 617020, 14 pages doi:10.1155/2008/617020 Research Article Stable Transmission in the Time-Varying MI...

Ngày tải lên: 22/06/2014, 00:20

... ∞ T , R imply that e −Λ t, s is nondecreasing in s, hence e −Λ  1/e −Λ t, s is nonincreasing in s see 4, Theorem 2.36.From4.15 and Advances in Difference Equations 3 Theorem A is the ... N, t 0 ∈ T is the initial point, x 0 ∈ R is the initial value, ϕ ∈ C rd t −1 ,t 0  T , R is the initial function such that ϕ has a finite left-sided limit at the initial point provided t...

Ngày tải lên: 21/06/2014, 11:20

... w π 1 ≥ w π 2 ≥ ··· ≥ w π K ≥ 0. By insert- ing the optimal decoding order into (8) and collecting two succeeding terms in the sum, we obtain the programming problem in (3). The optimization problem ... suboptimal. Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2008, Article ID 597072, 14 pages doi:10.1155/2008/597072 Research Article Feedba...

Ngày tải lên: 22/06/2014, 06:20

... (statistically independent links); (b) MIMO system with colocated antennas and insufficient antenna spacings at the transmitter side (spatially correlated links); (c) MIMO system with distributed ... Σ 1/2 Rx GR 1/2 Tx . 2.3. Normalization In order to treat MIMO systems with colocated antennas and MIMO systems with distributed antennas in a single, unify- ing framework, we e...

Ngày tải lên: 22/06/2014, 19:20

... w π 1 ≥ w π 2 ≥ ··· ≥ w π K ≥ 0. By insert- ing the optimal decoding order into (8) and collecting two succeeding terms in the sum, we obtain the programming problem in (3). The optimization problem ... optimization of the MIMO OFDM MAC under individual power constraints and under chunk constraints. In order to reduce the feedback overhead by informing the mobiles of their linear prec...

Ngày tải lên: 22/06/2014, 19:20

... evaluation: in (14)and(15), the integrand involves the fusion rule that is a highly nonlinear function of the CSI g, making the integration formidable. The only pos- sible way of finding the optimal ... “averaged” transmission channel. The difference between this alternative approach and that of minimizing (7) is in the way that the channel fading statistics, p(g), is utilized. In using...

Ngày tải lên: 22/06/2014, 22:20

... time-sharing Lines are presented in this figure. For the comparison purposes the line obtained for spatial waterfilling MIMO case has been plotted in Figure 12 (dotted line). The line has been derived in ... Piazza and U. Spagnolini, “Random beamforming for spa- tial multiplexing in downlink multiuser MIMO systems,” in Proceedings of the IEEE International Symposium on Personal,...

Ngày tải lên: 21/06/2014, 11:20

... converted into a concatenated MIMO system comprising single-relay MIMO channel for the first hop and MIMO broadcast channels (MIMO- BC) for the second hop. In this case, the MIMO- SVD and linear precoding ... shadowing effect [2]. The transmit beamforming and receive combining vector for user i can be determined in a similar manner. 4. Proposed Coordinated Transmission In this...

Ngày tải lên: 21/06/2014, 17:20

... ROI coding is used to improve the quality in specific regions of interest only by applying lossless or low compression in these regions, maintaining the high compression in regions of noninterest. ... transmitted in the simulated network in order to fill in the respective WiMAX class capacity in the link. The back- ground traffic is increased from 210 Kbps to 768 Kbps lead- ing th...

Ngày tải lên: 22/06/2014, 19:20