Phased-MIMO Radar: A Tradeoff Between Phased-Array and MIMO Radars
Aboulnasr Hassanien, Sergiy A. Vorobyov

TL;DR
This paper introduces phased-MIMO radar, a technique that combines the advantages of MIMO and phased-array radars by partitioning the array into overlapping subarrays for improved resolution and coherent processing gain.
Contribution
The paper proposes a novel phased-MIMO radar method that maintains phased-array gain while achieving MIMO resolution through overlapping subarrays and orthogonal waveforms.
Findings
Enhanced beampatterns demonstrated analytically.
Improved signal-to-noise-plus-interference ratios shown in simulations.
Validation of the technique's effectiveness through analytical and simulation results.
Abstract
We propose a new technique for multiple-input multiple-output (MIMO) radar with colocated antennas which we call phased-MIMO radar. The new technique enjoys the advantages of MIMO radar without sacrificing the main advantage of phased-array radar which is the coherent processing gain at the transmitting side. The essence of the proposed technique is to partition the transmitting array into a number of subarrays that are allowed to overlap. Then, each subarray is used to coherently transmit a waveform which is orthogonal to the waveforms transmitted by other subarrays. Coherent processing gain can be achieved by designing a weight vector for each subarray to form a beam towards a certain direction in space. Moreover, the subarrays are combined jointly to form a MIMO radar resulting in higher resolution capabilities. The substantial improvements offered by the proposed phased-MIMO radar…
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