A low elevation angle estimation algorithm for multiple in multiple out（MIMO） radar based on generalized real domain multiple signal classification（MUSIC） is proposed

aiming at problem of low altitude target elevation angle estimation. Using the characteristics of virtual matrix can be obtained using MIMO radar

the virtual matrix is vectorized to a virtual array. And by means of unitary transformation

transform spatial spectrum estimation of virtual matrix from the complex domain to the real domain

which reduce computation burden of the algorithm. Simulation results show that the proposed algorithm can effectively estimate the elevation angle of low altitude target under the conditions of direct signal and multipath signals weaken each other

and has better characteristics of elevation angle estimation compared with the generalized MUSIC algorithm for low altitude target.