This article deals with the multiple-input–multiple-output (MIMO) radar beampattern design in an effort to coexistence multiple communication systems. A waveform optimization model accounting for minimization of integrated sidelobe level (ISL) along mainlobe width, peak-to-average power ratio, and energy constraints, as well multispectral requirements where interference injected by MIMO each shared frequency band a particular direction, is precisely controlled ensure desired quality service...

Distributed phased Multiple-Input Multiple-Output (phased-MIMO) radar system consisting of separated subarrays possesses a high angle resolution but with sharing sidelobes. This paper therefore focuses on the design virtual low-sidelobe beampattern in distributed phased-MIMO radar. An iterative framework respect to subarray layout and receive weighting coefficients is proposed minimize Peak Sidelobe Level (PSL) accounting for practical position constraints as well mainlobe level restriction....

This brief considers the Direction of Arrival (DOA) estimation for Distributed mmWave Radar System (DmmWRS) in presence coherent sources and a single snapshot. To this end, large virtual aperture is firstly derived assuming that DmmWRS works time-sharing mode. Then, Fast Local Iterative Search Algorithm (FLISA) resorting to Adaptive Approach (IAA) prior DOA information obtained by radar, developed accurately estimate within small azimuth region interest. Finally, numerical simulations actual...

This letter proposes a novel window function design to synthesize asymmetric beampatterns while minimizing the gain loss for clutter/interference suppression as required in practical applications, such airborne phased array radar (APAR). Compared with beampattern synthesis terms of designing weight vector directly, proposed method can achieve sidelobes multiple steering directions resort one circumventing repetitive computations. To tackle resultant non-convex optimization problem, an...

In this paper, we propose a window function design to synthesize beampattern for uniform/sparse rectangular planar array (RPA) with strict constraints on gain loss ensure the performance of target detection/tracking, parameter estimation, etc. The structure under consideration in work is generated by Kronecker product two linear arrays, thus referred as RPA-K. addition common symmetric beampatterns, proposed method able asymmetric beampatterns enhance interference/clutter suppression...

In this paper, we propose a fast algorithm based on iterative adaptive approach to address the DOA estimation for distributed mmWave radar system under challenging conditions of single snapshot and coherent sources. order improve angular resolution, let each transmit sensor emit same signal in time-sharing construct large aperture virtual array. We first roughly derive azimuth angles with one using conventional beamforming. Then, resorting approach, search accurate estimations within very...

This paper considers the joint design of antenna position and power allocation in a shared aperture sparse phased array. We introduce new optimization model relying on minimization Peak Sidelobe Levels (PSL) beampattern under constraints, mainlobe constraints transmit constraints. In order to tackle non-convex problem, we resort Modified Membrane Algorithm based P Systems (MMAPS) along with its each iteration executed parallel. Finally, numerical simulations verify effectiveness proposed...

This paper focuses on the research of a general optimization framework applying to placement both two types nonuniform arrays, thinned array (TA) and sparse (SA). We introduce problems that aim minimize factor (AF) peak sidelobe level (PSLL), also involving number practical constraints. To tackle resultant non-convex problems, we propose modified iterative coordinate descent (MICD) method split original into multiple independent one-dimensional subproblems. In each iteration, redundant...

In this paper, we propose a novel window function design for linear arbitrary array with constrained gain loss to synthesize beampatterns. Compared the classical adjustable functions (CAWFs), proposed can be applied thinned/sparse and symmetric/asymmetric beampattern synthesis multiple steering directions. To end, alternating direction method of multipliers (ADMM) is embedded into iterative convex approximation (ICA) framework address resultant nonconvex optimization problem. Finally,...

This letter considers a distributed cascade of two millimeter-wave (mmWave) radars to achieve large virtual aperture for high-resolution angle measurement. In order explore the high sidelobe problem caused by radars, we derive general Bartlett spatial spectrum expression array. Furthermore, introduce four cases describe relationship between radar spacing, number transmitters/receivers, and position spectrum. Finally, numerical simulation experiment examples are provided verify effectiveness analysis.

In this paper, we deal with the design of constant modulus weight vector in an effort to achieving a desired transmit beampattern nulling spatial interest. The model is formulated accounting for maximizing ratio mainlobe level weighted integrated sidelobe presence restriction. To handle resulting non-convex (in general NP-hard) problem, iterative approach resorting complex circle manifold proposed. By deriving Riemannian gradient and retraction operator, each iteration proposed algorithm...