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» A Robust Beamformer Based on Weighted Sparse Constraint
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JSAC
2008
106views more  JSAC 2008»
15 years 5 months ago
Enhanced multiuser random beamforming: dealing with the not so large number of users case
We consider the downlink of a wireless system with an M-antenna base station and K single-antenna users. A limited feedback-based scheduling and precoding scenario is considered th...
Marios Kountouris, David Gesbert, Thomas Sälz...
CVPR
2011
IEEE
15 years 1 months ago
Sparse Reconstruction Cost for Abnormal Event Detection
We propose to detect abnormal events via a sparse reconstruction over the normal bases. Given an over-complete normal basis set (e.g., an image sequence or a collection of local s...
Yang Cong, Junsong Yuan, Ji Liu
ICC
2007
IEEE
104views Communications» more  ICC 2007»
16 years 1 days ago
Joint Design of Tx-Rx Beamformers in MIMO Downlink Channel
We consider a single-cell multiple-input multiple-output (MIMO) downlink channel where linear transmission and reception strategy is employed. The base station (BS) transmitter is...
Marian Codreanu, Antti Tölli, Markku J. Juntt...
ICASSP
2009
IEEE
16 years 13 days ago
Transmit beamforming for wireless multicasting using channel orthogonalization and local refinement
The problem of transmit beamforming for single-group multicasting is considered, where the objective is to transmit common information to a (large) number of users. The transmitte...
Ahmed Abdelkader, Imran Wajid, Alex B. Gershman, N...
ICASSP
2010
IEEE
15 years 5 months ago
Semi-Supervised Hyperspectral Unmixing via the Weighted Lasso
In this paper a novel approach for semi-supervised hyperspectral unmixing is presented. First, it is shown that this problem inherently accepts a sparse solution. Then, based on t...
Konstantinos Themelis, Athanasios A. Rontogiannis,...