Design of Phased MIMO Radar and Its Performance Analysis Based on Different Beamforming Algorithms

Abstract

A new approach of multiple-input multiple-output (MIMO) radar is proposed with accumulated antennas, which is called as Phased-MIMO radar. This technique is a bridge between MIMO and phased array, which is basically trying to take advantages of both. This new hybrid technique, MIMO radar can add diversity gain without sacrificing the coherent processing gain at the transmitting side which is the main advantage of phased-array radar. In this technique, the array of phased array system is divided into a numbers of subarrays, each subarray is assigned to coherently transmit or receive an orthogonal waveform. To form a beam towards the desired signal in assured direction weight vector is formulated for each subarray, using this technique coherent processing gain is achieved. Every subarray is combined to form MIMO radar, finally resulting in higher resolution capabilities. Our new proposed Phased-MIMO radar is designed using LCMV and MVDR adaptive beamforming technique, a comparative analysis is presented and simulated results are also shown for corresponding beampattern.