Atef Farrouki

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Voice activity detection (VAD) is frequently used in many speech processing applications to distinguish the active voice regions from the silent intervals. In speech compression systems, the VAD represents an important build-in component to reduce the network bandwidth consumption through the discontinuous transmission mode. In this paper, we propose a VAD(More)
Thepaper dealswith detection of range spread targets embedded in K-distributed clutter with unknown parameters.A two-step detection algorithmbasedonmultiple-pulse cell-averaging scheme and using lookup tables is proposed. First, the threshold factors that maintain a constant probability of false alarm for various clutter parameters are offline computed and(More)
A hybrid PN-code acquisition scheme is proposed and studied for direct sequence code division multiple access communications in frequency-selective Rayleigh fading channels. The most important feature of the proposed system is its ability to dynamically estimate the number of multipath signals that may lie in the reference channel. The basic idea of the(More)
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