B. Friedlander et A. Zeira, DETECTION OF BROAD-BAND SIGNALS IN FREQUENCY AND TIME DISPERSIVE CHANNELS, IEEE transactions on signal processing, 44(7), 1996, pp. 1613-1622
A major problem for active sonar systems operating in shallow water is
reverberation, High time-bandwidth waveforms and coherent matched fil
tering are often used to improve detection performance in reverberatio
n, However, an active sonar echo undergoes distortion during two-way p
ropagation and reflection from the target, As a result, the full perfo
rmance gain is not achievable, and this approach is severely limited,
In this case, more robust detectors are needed. In this paper, we eval
uate the detection performance of several commonly used detectors in a
n ideal nondistorting channel, a fast-fading distortion (FFD) channel,
and a channel with time-spreading distortion (TSD), We examine the ro
bustness of the various detectors by evaluating the performance in the
case of mismatch between the detector and the channel parameters, Stu
dying the relation between the FFD model and the TSD, we show that, un
der certain conditions, the TSD and FFD channels have an equivalent ef
fect on the waveform.