Messaoud Benidir

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The polyspectrum modeling problem using linear or quadratic filters is investigated. In the linear case, we show that, if the output pth-order cumulant function of a filter, driven by a white noise, is of finite extent, then the filter necessarily has a finite extent impulse response. Next, we establish expressions of the output polyspectrum of a quadratic(More)
In this paper we propose to distinguish between constant amplitude polynomial phase signals and the ones having random amplitude. We study four possibilities for the modulating process. We show that the distinction of this kind of signals is not always possible when using the Polynomial Phase Transform. In fact, in some applications, we show that we cannot(More)
Usually, in radar imaging, we suppose that the reflectors respond the same way regardless of the angle from which they are viewed and have the same properties within the emitted frequency bandwidth. Nevertheless, new capacities in SAR imaging (large bandwidth, large angular excursions of analysis) makes this assumption obsolete. The original application of(More)