We propose a simple implementation to obtain super-broadband geometric phase devices (GPD) by means of circular polarization converter (CPC) with mirror symmetry. demonstrate that the best choice wideband GPDs and CPCs is symmetric structure. Based on two-rotation model Poincaré sphere, optimization parameters time are significantly reduced. The CPC can be extended GPD, such as gratings (PGs), ...

To build high quality wideband acoustic models for automatic speech recognition (ASR), a large amount of wideband speech training data is required. However, for a particular language, one may have available a lot of narrowband data, but only a limited amount of wideband data. This paper deals with such situation and proposes a narrowband to wideband expansion algorithm that expands the narrowba...

A 3-sided truncated microstrip patch antenna with semicircular open slot for ultra-wideband (UWB) and SHF (Super High Frequency) applications has been presented in this paper. The proposed antenna is compact in size and designed on FR4 substrate. From the simulation and measurement results, it is shown that the corner-truncated With Semi Circular open slot patch scheme is an excellent approach,...

Recently super-wideband (SWB) and even fullband (FB) capable communication devices were introduced in the markets providing an audio bandwidth up to 20 kHz. At the same time, the development of speech enhancement algorithms proceeds for SWB/FB applications. To ensure sufficient quality from the end user’s point of view, there is clearly a need for new measurement methods taking into account all...

1397 Robust deconvolution-based methods using sparsity constraint and sparse regularization achieve high spatial resolutions in aeroacoustic imaging in low Signal-to-Noise Ratio (SNR). But sparse prior and model parameters should be further optimized to obtain super resolution and be robust to sparsity constraint. In this paper, we propose a Robust Approach with Bayesian Sparse Regularization i...

This paper provides a description of the preparation, the speakers, the recordings, and the creation of the orthographic transcriptions of the first large scale speech database for Austrian German. It contains approximately 1900 minutes of (read and spontaneous) speech produced by 38 speakers. The corpus consists of three components. First, the Conversation Speech (CS) component contains free c...