In this paper, we consider the problem of estimating the coarse Doppler shift ratio for
underwater acoustic communication (UWAC). Since underwater the constant motion of …

Preamble detection before data transmission is an important module for an underwater
communication system, since false detections would bring undesirable consequences in …

Pulse compression radar is used to simultaneously avail the benefits of both short-duration
and long-duration pulses. However, the matched filter output has high side-lobe levels along …

This paper proposes a method to estimate the target velocity using a combination of two
hyperbolic frequency-modulated (HFM) signals. The Doppler-shifted time-delay between the …

Linear frequency modulation (LFM) signals have been widely used for target detection in
active sonar systems due to their robustness to reverberation. However, LFM active sonar …

The random sample consensus algorithm has been successfully employed for the
estimation of parameters in polynomial phase signals. It significantly reduces the signal-to …

The quasi-maximum likelihood (QML) algorithm has been extended to estimate the phase
parameters and the instantaneous frequency (IF) of the hyperbolic frequency modulated …

A two-stage technique for estimating hyperbolic frequency modulated (HFM) signal
parameters is proposed. In the first stage, coarse parameter estimations are performed …

The purpose of this paper is to introduce an extended matched filter for hyperbolic frequency
modulation (HFM) waveforms in active sonar systems, along with an exact closed-form …

The surroundings of underground mining machines still constitute an unsafe area for miners
due to bad visibility conditions. In this paper, we present a novel acoustic position estimation …