Direction finding method of weak target signal based on interferometer

• Main Authors: HUANG PENGHUI, JIANG XINGLONG, ZHAO LULU, MA JINGTAO, LIANG GUANG, WANG YAPING, LYU SONGLING, SUN SIYUE, YU JINPEI
• Format: Patent
• Language: Chinese; English
• Published: 17.11.2023
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TESTING

The invention provides a non-uniform subarray synthesis interferometer direction finding method based on a satellite-borne phased array. The method comprises the following steps: determining an interferometer baseline by using array resources of a communication phased array; dividing the communication phased array to form a non-uniform phased array sub-array; according to rough prior information of a ground target position, performing signal synthesis on the received signals of the phased array sub-arrays to form a synthesized signal; phase discrimination is carried out on the synthesized signals in a frequency domain accumulation mode; and completing two-dimensional synthesis interferometer direction finding according to the interferometer base line so as to realize high-efficiency real-time direction finding of weak signals under the condition that on-satellite resources are limited. 本发明提供了一种基于星载相控阵的非均匀子阵合成干涉仪测向方法，包括：利用通信相控阵的阵列资源确定干涉仪基线；对通信相控阵进行划分，形成非均匀相控阵子阵；依据地面目标位置的粗略先验信息，对相控阵子阵的接收信号进行信号合成，形成合成信号；对合成信号分别采