A unified approach to adaptive radar processing with general antenna array configuration

Farina, A.; Lombardo, P.; Ortenzi, L.

doi:10.1016/j.sigpro.2004.05.004

Cited by 17 publications

(6 citation statements)

References 11 publications

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“…Therefore, a DOA-dependent scale factor according to (39) can be considered to compensate the difference between the measured bistatic range and the required monostatic value for the correct application of ( 27) or ( 28) and (30). However, it is easy to see that:…”

Section: Frame To Frame Processingmentioning

confidence: 99%

Passive Radar Array With Low-Power Satellite Illuminators Based on Fractional Fourier Transform

Santi

Pastina

et al. 2017

IEEE Sensors J.

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This paper addresses the detection of surface slow moving targets by means of an array passive radar based on low-EIRP satellite illuminators of opportunity. Particularly, the use of the receiving array of K elements is considered to provide increased detection capability for targets with limited radar cross section, together with the capability to estimate the target direction-of-arrival (DOA). A full processing scheme is proposed to exploit together both the long integration times and the multiple receiving elements. This includes a coherent space-time integration of the signal received at the K antenna elements during short frames, followed by an incoherent frame to frame integration.The proposed scheme is based on the Fractional Fourier Transform (FrFT) that is shown to map the signals into a natural rotated frequency-angle plane, where we can easily compensate the target Doppler frequency shifts available at the different antenna elements and temporal frames. Its effectiveness is shown by application to different synthetic scenarios, where the target detection is only achievable when all the possible integration gain is capitalized.

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Section: Frame To Frame Processingmentioning

confidence: 99%

Passive Radar Array With Low-Power Satellite Illuminators Based on Fractional Fourier Transform

Santi

Pastina

et al. 2017

IEEE Sensors J.

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“…As an example, in Figure 5 (solid line), the array pattern obtained by weighting the signals received by the antennas of the selected configuration according to (16), for 0 = 120 ∘ , is represented, assuming that the disturbance covariance matrix M, but for a multiplicative constant, is given by…”

Section: Optimum Filtermentioning

confidence: 99%

“…This is quite appropriate in the PCL case given that the level of both the direct signal and its multipath reflections is well above that of the useful signal. After combining the received signals according to (16), an adaptive temporal cancellation might be performed only to cancel disturbance residuals not adequately suppressed by the spatial adaptive filter. Then, the standard 2D (range-Doppler) crosscorrelation function (2D-CCF) is evaluated, and a proper constant false alarm rate (CFAR) threshold is applied to obtain a detection map.…”

Section: Optimum Filtermentioning

confidence: 99%

Antenna Array for Passive Radar: Configuration Design and Adaptive Approaches to Disturbance Cancellation

Villano

Colone

Lombardo

2013

International Journal of Antennas and Propagation

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We consider the selection of an antenna array configuration, composed of a small number of omnidirectional elements, to be exploited for passive radar sensors. Based on properly identified pattern characteristics and design criteria for practical applications, a suitable planar configuration is selected that allows both angular selectivity and direct signal attenuation. The selected configuration is further optimized in terms of sidelobe level by resorting to appropriate amplitude tapering. Moreover, three different approaches are investigated for antenna-based adaptive disturbance cancellation, and a comparative performance analysis is carried out. Simulation results show that an effective clutter suppression is obtained if the direct signal from the transmitter is attenuated by means of spatial adaptive cancellation, and the multipath echoes from stationary obstacles are removed by means of temporal adaptive cancellation. In particular, the approach based on the Sidelobe Canceller is shown to yield good performance while requiring a limited system complexity.

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“…They are forced to achieve the quiescent design pattern in the absence of interference. The filters are mismatched optimum detector (MOD) filter [25,26] and a generalized side-lobe canceller (GSLC) filter [27,28].…”

Section: Adaptive Techniques For Spsd Based Thinned Arraysmentioning

confidence: 99%

Planar Thinned Arrays: Optimization and Subarray Based Adaptive Processing

Lombardo

Cardinali

Bucciarelli

et al. 2013

International Journal of Antennas and Propagation

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A new approach is presented for the optimized design of a planar thinned array; the proposed strategy works with single antenna elements or with small sets of different subarray types, properly located on a planar surface. The optimization approach is based on the maximization of an objective function accounting for side lobe level and considering a fixed number of active elements/subarrays. The proposed technique is suitable for different shapes of the desired output array, allowing the achievement of the desired directivity properties on the corresponding antenna pattern. The use of subarrays with a limited number of different shapes is relevant for industrial production, which would benefit from reduced design and manufacturing costs. The resulting modularity allows scalable antenna designs for different applications. Moreover, subarrays can be arranged in a set of subapertures, each connected to an independent receiving channel. Therefore, adaptive processing techniques could be applied to cope with and mitigate clutter echoes and external electromagnetic interferences. The performance of adaptive techniques with subapertures taken from the optimized thinned array is evaluated against assigned clutter and jamming scenarios and compared to the performance achievable considering a subarray based filled array with the same number of active elements.

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A unified approach to adaptive radar processing with general antenna array configuration

Cited by 17 publications

References 11 publications

Passive Radar Array With Low-Power Satellite Illuminators Based on Fractional Fourier Transform

Passive Radar Array With Low-Power Satellite Illuminators Based on Fractional Fourier Transform

Antenna Array for Passive Radar: Configuration Design and Adaptive Approaches to Disturbance Cancellation

Planar Thinned Arrays: Optimization and Subarray Based Adaptive Processing

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