The paper shows the non CFAR characteristic of the Asymptotically Optimum Detector (AOD), when applied to a mixture of K-distributed clutter plus thermal noise, as the target Doppler frequency is varied. The upper bound to the performance: against such composite disturbance is investigated by considering an ideal-AOD detector, which assumes the knowledge of the local clutter power in the cell under test. A practical scheme is obtained by replacing the known local power value with its estimate. The resulting detection scheme, named Locally Adaptive-AOD (LA-AOD) shows a proper CFAR characteristic, but yields strong detection losses In the same Doppler frequency region where the original AOD operates effectively with CFAR. Finally, a combined detector, Comb-AOD, is proposed, which takes the benefits of both the AOD and LA-AOD structures, and its detection performance is fully characterized as clutter spikiness and correlation vary.

CFAR coherent radar detection against K-distributed clutter plus thermal noise / Lombardo, Pierfrancesco; Pastina, Debora; Bucciarelli, Tullio. - (1998), pp. 129-134. (Intervento presentato al convegno IEEE Radar Conference on Challenges in Radar Systems and Solutions tenutosi a DALLAS, TX nel MAY 11-14, 1998) [10.1109/nrc.1998.677989].

CFAR coherent radar detection against K-distributed clutter plus thermal noise

LOMBARDO, Pierfrancesco;PASTINA, Debora;BUCCIARELLI, Tullio
1998

Abstract

The paper shows the non CFAR characteristic of the Asymptotically Optimum Detector (AOD), when applied to a mixture of K-distributed clutter plus thermal noise, as the target Doppler frequency is varied. The upper bound to the performance: against such composite disturbance is investigated by considering an ideal-AOD detector, which assumes the knowledge of the local clutter power in the cell under test. A practical scheme is obtained by replacing the known local power value with its estimate. The resulting detection scheme, named Locally Adaptive-AOD (LA-AOD) shows a proper CFAR characteristic, but yields strong detection losses In the same Doppler frequency region where the original AOD operates effectively with CFAR. Finally, a combined detector, Comb-AOD, is proposed, which takes the benefits of both the AOD and LA-AOD structures, and its detection performance is fully characterized as clutter spikiness and correlation vary.
1998
9780780344921
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/242495
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