A flexible circularly polarized (CP) wearable antenna is proposed for a wireless body area network at the 5.8-GHz industrial, scientific, and medical band. The made of polyimide foam material. CP radiation enabled by loading two pairs shorting pins on rectangular patch antenna. 3-dB axial ratio (AR) bandwidth doubled adding inverted L-shaped parasitic stubs both sides For validation, with dimen...

In this paper the signal subspace approach for nonpara-metric speech enhancement is considered. Several algorithms have been proposed in the litterature but only partly analyzed. Here, the diierent algorithms are compared , and the emphasis is put onto the limiting factors and practical behavior of the estimators. Experimental results show that the signal subspace approach may lead to a signiic...

A reliable speech enhancement method is important for speech applications as a pre-processing step to improve their overall performance. In this paper, we propose a novel frequency domain method for single channel speech enhancement. Conventional frequency domain methods usually neglect the correlation between neighboring time-frequency components of the signals. In the proposed method, we take...

Speech Enhancement can be used as a preprocessing technique in any of the speech communication systems. Speech communication involves a speaker, listener and communication device. The background noise present in the speech signal while transmitting has to be removed from the noisy speech signal to increase the signal intelligibility and to minimize the listener fatigue. The proposed approach is...