In audio communication systems, the perceptual audio quality of the reproduced audio signals such as the naturalness of the sound is limited by the available audio bandwidth. In this paper, a wideband to super-wideband audio bandwidth extension method is proposed using an ensemble of recurrent neural networks. The feature space of wideband audio is firstly divided into different regions through...

An objective quality measurement methodology for wideband-speech coding has been studied, its essential components being an objective quality measure and an input test signal. Wideband-PESQ conforming to draft Recommendation P.862 has been studied as the objective quality measure. The Wideband-PESQ has been verified from the viewpoint of the consistency between subjectively evaluated MOS and ob...

A method is described for quantifying the quality of wideband speech codecs. Two parameters are derived from signal-based speech quality model estimations: (i) a wideband equipment impairment factor Ie,WB and (ii) a wideband packet-loss robustness factor Bpl,WB. The equipment impairment factor can be combined with impairment factors for other quality degradations to form an estimate of the over...

Wideband spectrum sensing is one of the most challenging aspects of Cognitive Radio Networks (CRNs). It should be performed as fast and as accurate as possible. Traditional wideband spectrum sensing techniques require excessively high sampling rate analog-to-digital converters (ADCs). Compressed sensing was considered to enable wideband spectrum sensing at a much lower sampling rate below the N...

1. Introduction With the rapid growth of various wireless services and applications calling for high data rate transmission there is a demand for developing robust wideband wireless technology. In order to counter count adverse phenomena such as multi-path signal propagation and interference, which become more pronounced in wideband systems, smart antennas can be employed as a remedy. So far, m...

A new approach to wideband and smart re-configurable antennas using RF MEMS switches and fractal antennas is presented. Index Terms – Smart antennas, wideband, fractals, RF-MEMS.

In this paper, a novel compact and wideband fylfot-shaped planar monopole antenna is proposed. The fylfot-shaped is suggested to reduce the volume of a general crossed planar monopole antenna. The volume of the proposed antenna is about 1/4 of a general crossed planar monopole antenna under the conditions where the wideband characteristics are maintained. This technique is suitable for the desi...

in this paper, a new approach for estimating the number of wideband sources is proposed which is based on rss or ism algorithms. numerical results show that the mdl-based and eit-based proposed algorithm havea much better detection performance than that in egm and aic cases for small differences between the incident angles of sources. in addition, for similar conditions, rss algorithm offers hi...

During the last two decades, Maximum Likelihood estimation (ML) has been used to determine Direction Of Arrival (DOA) and signals propagated by the sources, using narrowband array signals. The algorithm fails in the case of wideband signals. As an attempt by the present study to overcome the problem, the array outputs are transformed into narrowband frequency bins, using short time Fourier tran...

In general, narrowband systems require more complex terminals which require more space and power and are more costly than wideband terminals. Conversely, in general, wideband systems require more costly transmission facilities. Most Defense tactical users require wideband facilities at the present time due to weight, size, and power constraints. Nontactical users generally are located in an ofk...