The invention discloses a low-altitude target detection method for a frequency diversity array
radar, belonging to the field of
phased array radar low-altitude target detection. According to the method, due to the scanning characteristics of an FDA
radar, the
beam direction of the radar is related to a radial distance and a
frequency difference, by introducing a
frequency difference between different transmitting elements, a
signal-to-
noise ratio loss brought by a
multipath effect in a low-altitude target environment can be effectively suppressed. Then, a
generalized likelihood ratio test (GLRT) method is used to derive an FDA radar low-altitude target
detector, and a target detection probability can be effectively improved under a certain
false alarm rate. Finally, through the design of sub modules of
matrix multiplication, matrix
determinant calculation the like, an FDA radar low-altitude target
detector is realized in an FPGA hardware platform, and the real-time detection of the FDAradar low-altitude target detection is effectively improved. In summary, according to the method, in a low-altitude target environment, the scanning characteristics of the FDA radar can be used to effectively complete the detection of a low-altitude target, and the method has high practicability in modern warfare.