Abstract:

A new algorithm based on one single snapshot is proposed for fast angle estimation of coherent multi-target for bistatic multiple input multiple output (MIMO) radars. The algorithm uses one single snapshot received data to construct a set of Toeplitz matrices and reconstruct a new received data matrix. It is shown that the rank of the new received data matrix is equal to the number of the targets. Through the matrix transformation of the new reconstructed matrix, the matrix transformed is a centro Hermitian matrix, which can realize that the complex value covariance matrix can be turned into a real value field by unitary transformation and parameter in a real valued field can be estimated. The estimation of signal parameters via rotational invariance technique (ESPRIT) algorithm can directly be applied to estimate the direction of departure (DOD) and the direction of arrival (DOA). The simulation results illustrate that the DOD and DOA of the coherent target can be estimated efficiently with automatic pairing. The proposed method reduces the high computational complexity of eigen value decomposition in a complex valued field and has better estimation performance and robustness. Further the proposed method can realize the angles’ track of moving targets and has excellent track performance.