Enumeration of unresolved radar targets with beamspace post-Doppler CFAR

In this paper, enumeration method for unresolved radar targets containing in one specific Doppler bin in radar array antenna is proposed. The proposed method uses adaptive threshold to detect targets in beamspace and post-Doppler domain to improve target enumeration accuracy in lower SNR with respect to conventional MDL (Minimum Description Length) based method. Moreover, unlike those conventional methods, threshold in the proposed method is controlled to maintain the user-specified probability of false enumeration. By computer simulation, the proposed method achieved 62.3 % of enumeration accuracy in the scenario of two highly-correlated mainbeam target of respective SNR = 20 dB while MDL achieved 9.1 % of the accuracy.