Adaptive monopulse processing of monostatic clutter and coherent interference in the presence of mainbeam jamming

Seliktar, Y.; Williams, D.B.; Holder, E.J.

doi:10.1109/acssc.1998.751580

Cited by 4 publications

(3 citation statements)

References 3 publications

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“…For reasonable performance in the presence of mainbeam jamming and nonstationary TSI, Doppler processing must be incorporated into the monopulse processor. One such algorithm is discussed in [13,14].…”

Section: Other Resultsmentioning

confidence: 99%

A Space/Fast-Time Adaptive Monopulse Technique

Seliktar

Williams

Holder

2006

EURASIP J. Adv. Signal Process.

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Mainbeam jamming poses a particularly difficult challenge for conventional monopulse radars. In such cases spatially adaptive processing provides some interference suppression when the target and jammer are not exactly coaligned. However, as the target angle approaches that of the jammer, mitigation performance is increasingly hampered and distortions are introduced into the resulting beam pattern. Both of these factors limit the reliability of a spatially adaptive monopulse processor. The presence of coherent multipath in the form of terrain-scattered interference (TSI), although normally considered a nuisance, can be exploited to suppress mainbeam jamming with space/fast-time processing. A method is presented offering space/fast-time monopulse processing with distortionless spatial array patterns that can achieve improved angle estimation over spatially adaptive monopulse. Performance results for the monopulse processor are obtained for mountaintop data containing a jammer and TSI, which demonstrate a dramatic improvement in performance over conventional monopulse and spatially adaptive monopulse.

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Section: Other Resultsmentioning

confidence: 99%

A Space/Fast-Time Adaptive Monopulse Technique

Seliktar

Williams

Holder

2006

EURASIP J. Adv. Signal Process.

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“…This processor consists of two sets of weights set to the sum and difference steering vectors, respectively [8,9] …”

Section: Conventional Monopulse Processormentioning

confidence: 99%

“…The mapping function, called the monopulse response curve (MRC) [8,9], is given in terms of the ratio of the two receive beam pattern functions. It represents the ideal response of the antenna to targets across various angles, so MRC, M(f), is defined as…”

Section: Conventional Monopulse Processormentioning

confidence: 99%

Enhanced monopulse tracking radar using optimum fractional Fourier transform

Elgamel

Soraghan

2011

IET Radar Sonar Navig.

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Conventional monopulse radar processors are used to track a target that appears in the look direction beam width. The distortion produced when additional targets appear in the look direction beam width can cause severe erroneous outcomes from the monopulse processor. This leads to errors in the target tracking angles that may cause target mistracking. A new signal processing algorithm is presented in this study which offers a solution to this problem. The technique is based on the use of optimal fractional Fourier transform (FrFT) filtering. The relative performance of the new filtering method over traditionalbased methods is assessed using standard deviation angle estimation error (STDAE) for a range of simulated environments. The proposed system configuration succeeds in significantly cancelling additional target signals appearing in the look direction beam width even if these targets have the same Doppler frequency.

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Empirical mode decomposition-based monopulse processor for enhanced radar tracking in the presence of high-power interference

Elgamel

Soraghan

2011

IET Radar Sonar Navig.

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Monopulse radars are used to track targets that appear in the look direction beam width. The distortion of the tracking information produced when high power interference signals (jamming) are introduced through the radar antenna can cause severe erroneous outcomes from the monopulse tracking processor. This leads to errors in the target tracking angles that may cause target mistracking. New monopulse radar structures that utilizes an empirical mode decomposition (EMD) based denoising processor are presented in this paper. EMD filtering is carried out for the complex radar chirp signal with subsequent detrending, thresholding, and denoising processes. These processes are used to decrease the noise level in the radar processed data to improve the signal to noise ratio. The performance enhancement using the monopulse radar tracking system with EMD based filtering is included using the standard deviation angle estimation error (STDAE) for different jamming scenarios and different target SNRs. STDAE shows that the new EMD based system works well in the case of main beam interference and side lobe interference for the conventional processor and, in the case of the spatial adaptive processor, is effective in the case of main lobe interference

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Adaptive monopulse processing of monostatic clutter and coherent interference in the presence of mainbeam jamming

Cited by 4 publications

References 3 publications

A Space/Fast-Time Adaptive Monopulse Technique

A Space/Fast-Time Adaptive Monopulse Technique

Enhanced monopulse tracking radar using optimum fractional Fourier transform

Empirical mode decomposition-based monopulse processor for enhanced radar tracking in the presence of high-power interference

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