Radar CFAR Thresholding in Clutter and Multiple Target Situations

Detection of very close targets by fusion CFAR detectors

“…The main idea of the concept of OS-CFAR detector is the selection of a particular value X (k) , k {1,2,...,N}, to obtain the estimated value of an average power of the clutter in the observed window detection. The value of probability of detection for OS-CFAR detector can be calculated by following [4]:…”

“…Used CFAR detectors have the same parameters in each scenario. Main parameters of realized CFAR detectors are listed in Table 2, where P fa is the probability of false alarm rate, N is reference window size, T is scaling factor of the detection threshold, k is well known parameter of OS-CFAR algorithm [4] and T 1 and T 2 are number of smallest and greatest ranked cells respectively, which are discarded in TM-CFAR algorithm [5]. …”

“…In this paper a detection of very close targets per azimuth and per range using the Linear and NonLinear Fusion Constant False Alarm Rate (LF-CFAR and NLF-CFAR) detectors [1,2] and single CA-CFAR (Cell Averaging CFAR) [3], OS-CFAR (Ordered Statistic CFAR) [4] and TM-CFAR (Trimmed Mean CFAR) is considered [5]. The entire simulation is done on the basis of the software defined radar receiver [6].…”

Some Radar Topics: Waveform Design, Range Cfar and Target Recognition

“…But the CA and CAGO-CFAR detection procedures behave very sensitively in multiple target situations and show pure performance. This observation has been described in [14]. It was shown that even in a two-target situation it is possible that both targets are masked by each other.…”

“…For reliable target detection in this multi target environment, an ordered-statistic (OS) constant-false-alarm-rate (CFAR) thresholding has been applied which showed the best experimental results [14].…”