Mohsen Mivehchy

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In this paper a new method is introduced for evaluating effect of sweep noisy barrage jammer on tracking radars. In this method, jammer interfering energy that injected in radar receiver bandwidth is calculated during jammer scan period, then according to the minimum signal to jammer power ratio that is required for receiver proper functioning(More)
In recent decades, S-parameters have been used to model the Linear High Frequency Amplifier behavior. Using the S-parameter, the source and load reflection coefficient can be calculated, which is useful for designing the Input and Output matching network in linear amplifier. The S-parameter cannot model the behavior of the nonlinear amplifiers. X-parameter(More)
In this paper, the effects of phase noise difference in receiving signals are introduced to discriminate targets. Oscillators and signal sources have their own phase noise levels and specific patterns. This property can be used for discriminating a real target from the airborne digital radio frequency memory (DRFM) in continuous wave tracking radar sensor(More)
In this paper, we address the problem of direction-of-arrival (DOA) estimation using a novel spatial sampling scheme based on difference set (DS) codes, called DS-spatial sampling. It is shown that the proposed DS-spatial sampling scheme can be modeled by a deterministic dictionary with minimum coherence. We also develop a low complexity compressed sensing(More)
In this paper, we consider compressive sensing (CS)based recovery of delays and Doppler frequencies of targets in high resolution radars. We propose a novel sub-Nyquist sampling method in the Fourier domain based on difference sets (DS), called DS-sampling, to create dictionaries with highly incoherent atoms. The coherence of the dictionary reaches the(More)
In the last decades, several analytical approaches for linear RF modeling and design have been introduced. In general, using these approaches, source and load reflection coefficients are calculated for designing input and output matching networks. This reflection coefficient is set to achieve a specific target such as maximum output power and minimum noise(More)
A deception jamming recognition method is proposed based on Adaptive Kernel Local Fisher Discriminant Analysis. The digital radio frequency memory (DRFM) in jammer creates multiple repeat false targets, are commonly utilized in practical applications for limitation of defense radar tracking and discrimination unit. So as to face with decision scheme groups(More)
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