FDA radar first receiving scheme improvement method based on ordinary beam scanning

The invention discloses an FDA radar first receiving scheme improvement method based on ordinary beam scanning. The main idea for realizing the method is as follows: for echo signals received by a frequency diversity array (FDA) radar, the echo signals in a selected passband range are filtered by a wide-passband band-pass filter, and after noise and interference beyond the selected passband range are filtered, an echo signal with a single carrier frequency is obtained through a narrowband filter of which the output is a single carrier frequency; and then, ordinary beam scanning is carried out on the obtained echo signal with a single carrier frequency. Thus, the echo signals received by the frequency diversity array (FDA) radar can be fully utilized.