Multipoint transmitting millimeter-wave radar direction finding method based on compressed sensing

The invention aims at providing a radar direction finding method which not only can achieve the high precision but also can achieve the wide range. The method comprises the following steps that 1, a direction finding area is divided into M*N grids; 2, a propagation function H1 and an echo function H2 are obtained through analysis; 3, a control matrix A is set, and signals transmitted by radar units are controlled separately according to the control matrix A; 4, echo signals are received by adopting R radar receiving units, and an echo matrix y formed by the echo signals is obtained; 5, reflection coefficients of the various grids of the direction finding area are calculated according to the propagation function H1, the echo function H2, a control matrix C and the echo matrix y; 6, a reflection coefficient matrix x represented by M*N matrixes is obtained through backstepping; and 7, whether or not the various reflection coefficients in the reflection matrix x are higher than a predetermined threshold is judged