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This paper presents a novel feed for dual-layer pillbox antenna. The electric field distribution and return-loss of the feed Cavity are analyzed by using vector finite-element method and PML absorption boundary condition. The effect of the different Sub-reflector Shape on the electromagnetic field distribution and the beam width of the feed are studied. A new bow-tie feed structure is proposed. The...
In this paper, the linear minimum mean square error beamformers are designed for relay-assisted cloud radio access network (C-RAN). In C-RAN, the remote radio units are separated from the baseband units to save energy cost. To further enhance network coverage, it is a good choice to duly arrange relay nodes. Regrading the per-antenna power constraints at both the relay nodes and the remote radio heads...
Consider secure transmissions over the downlink of a multiuser MISO system with independent confidential messages, each of which is intended for one of the users and should keep secret from others. We are interested in a scenario where users have individual secrecy rate requirements. This scenario is practical but has drawn little attention in the literature so far. In this paper, we propose a secrecy...
Using high-dimensional Joint Factor Analysis (JFA) speaker supervectors for the Fishervoice based subspace analysis suffers high computational complexity problem in the model training process. To address this problem, we propose a two-level sampling subspace framework. For the first level of this framework, partial mean vectors are selected from the JFA speaker supervector to form a low-dimensional...
Voice conversion can be formulated as finding a mapping function which transforms the features of a source speaker to those of the target speaker. Gaussian mixture model (GMM)-based conversion techniques [1, 2] have been widely used in voice conversion due to its effectiveness and efficiency. In a recent work [3], we generalized GMM-based mapping to Mixture of Probabilistic Linear Regressions (MPLR)...
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