Non circular Unitary ESPRIT-MUSIC for angle estimation in bistatic MIMO radar

In this letter, the bistatic Multiple-Input Multiple-Output radar with non circular signal is considered, and a novel non circular Unitary ESPRIT-MUSIC algorithm for the joint direction of departure (DOD) and direction of arrival (DOA) is presented. Firstly, the properties of the non circular signals are utilized to extend the received data, which corresponds to double elements of MIMO virtual array. Then the complex valued data matrix can be converted into a real valued matrix by Unitary transformation, and the DODs and DOAs can be estimated by Unitary ESPRIT and Unitary Root-MUSIC, respectively. The proposed method can provide better angle estimation performance and handle more targets than Unitary ESPRIT-MUSIC. Some simulation results are used to show the performance of the proposed method.