VAE/MPM/GA Technique for DoA Estimation Using Optimized Antenna Arrays

El-Dawi, Haidy A.; Napoleon, Sameh A.; Hussein, Amr H.

doi:10.1007/s11277-016-3605-1

Cited by 4 publications

(4 citation statements)

References 9 publications

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“…There is another trend for synthesizing antenna arrays using a fewer number of elements by using virtual antenna array (VAA) beamforming. The VAA concept is widely used in antenna array-based applications such as radar systems, multiple-input multiple-output (MIMO) systems, direction of arrival (DoA) estimation, and null broadening as introduced in [8][9][10][11][12][13][14]. In [8], the VAA has been used for MIMO synthetic aperture radar (SAR).…”

Section: Introductionmentioning

confidence: 99%

“…Where, the MoM/GA is used to estimate the excitation coefficients and the interelement spacing of the two orthogonal LAAs to provide the same radiation pattern as the original PAA. In [10,11], the modified virtual singular value decomposition (MV-SVD) algorithm and virtual array extension/matrix pencil method/genetic algorithm (VAE/MPM/GA) have been introduced, respectively. They are based on the VAA extension of small size antenna arrays to provide high DoA estimation accuracy.…”

Section: Introductionmentioning

confidence: 99%

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Optimized VAA Based Synthesis of Elliptical Cylindrical Antenna Array for SLL Reduction and Beam Thinning Using Minimum Number of Elements

et al. 2021

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In this paper, new virtual antenna array (VAA) based synthesis techniques are introduced for side lobe level (SLL) reduction, beam thinning, and number of elements minimization for elliptical cylindrical antenna arrays (ECAA) of radar systems. Thereby, significant improvements in the array gain and directivity are achieved, which enhance the detection range and angular resolution of the radar. Furthermore, the overall implementation cost of the system is highly reduced by saving the number of elements and the corresponding RF chains and simplifying the feeding network. Firstly, the proposed technique decomposes the single transmit/receive ECAA into a separate transmit linear antenna array (LAA) and receive elliptical antenna array (EAA). Secondly, the number of antenna elements, element spacing, and excitations of the created LAA and EAA are optimized using particle swarm optimization (PSO) to produce efficient beamformed patterns. Finally, the Kronker product of the optimized LAA and EAA patterns is performed to form the optimized virtual ECAA (V-ECAA) pattern. We also introduced both the uniform feeding based V-ECAA technique and the non-uniform feeding based V-ECAA synthesis technique for more flexibility and better productivity in antenna arrays design. The simulation results revealed that the uniform feeding based V-ECAA provides an identical pattern to that of the traditional uniform feeding ECAA while saves the number of elements by 66.6%. While in the case of non-uniform feeding based V-ECAA, it provides much lower SLL and narrower HPBW than those of the ECAA while saving the number of elements by 63.8%. Furthermore, the HB is applied to provide additional beam thinning and SLL reduction of the proposed nonuniform V-ECAA that is denoted as (HBV-ECAA). The possibility of practical validations of the synthesized V-ECAAs is verified using the computer simulation technology (CST) microwave studio package, which gives users an integrated design environment and achieves realizable and robust designs.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimized VAA Based Synthesis of Elliptical Cylindrical Antenna Array for SLL Reduction and Beam Thinning Using Minimum Number of Elements

et al. 2021

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“…The implementation of a VAA is not restricted to a specific design scheme. Recently, many VAA beamforming schemes have emerged for performance enhancement of traditional radar systems, multi-input multi-output (MIMO) radars, and automotive radars [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

“…The VAA concept also has gained a lot of attention in biomedical microwave imaging applications, as the accuracy of imaging is highly dependent on the number of spatially spaced real or virtual antenna elements, which indeed increases the recorded signal samples and produces pure images [12]. In the field of the direction of arrival (DOA) estimation, the VAA utilization significantly achieved higher detection accuracy and higher resolution, and increased the number of detectable sources [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

High-Resolution and Large-Detection-Range Virtual Antenna Array for Automotive Radar Applications

Abdullah

Mabrouk

Kabeel

et al. 2021

Sensors

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Collision avoidance and autonomous control of vehicles have become essential needs for providing a high-quality and safe life. This paper introduces a new generic scheme for a virtual antenna array (VAA) and its application in a train collision-avoidance system (TCAS). The proposed TCAS shall have the capability of identifying the range and angle of an object in front of a moving train and provide the required alerts. Thereby, a new virtual array distribution for both the transmitting and the receiving antenna arrays is introduced to get a long-range object detection and high-resolution multi-input multi-output (MIMO) system. This can be accomplished because the VAA radiation pattern is the multiplication of the radiation patterns for both the transmitting and receiving antenna arrays, which is different than each one of them alone. In this work, the VAA is utilized in radar systems in which the radar range depends on the multiplication of the gain of the transmitting and receiving antennas. So, we introduce a new scheme for the general design of VAA-based radars. A prototype for the antenna system was fixed on a of Texas Instruments platform for the cascading radar. One of the main problems of the VAA is the loss of radiated power in undesired directions, which affects the maximum detection range in beamforming systems and degrades the diversity gain in MIMO applications. These issues have been solved by the introduction of the practical implementation of a proposed high-gain, low side lobe level VAA system for automotive radar that is based on the integration of four AWR1243 RF chips operating in a frequency range of 76 GHz to 81 GHz. It was implemented using low-power 45 nm (TI) RFCMOS technology. The measured gain of the realized VAA was 47.2 dBi, which was 1.815 times higher than that of the Texas instrumentation linear frequency modulated continuous wave (TI’ LFMCW) radar, which was 26 dBi. The proposed VAA saved 45% of the required implementation area compared to the TI’ LFMCW antenna array. The VAA system was fabricated and tested in an anechoic chamber, and it was found that the simulated and measured patterns of the proposed VAA were highly matched in terms of half-power beamwidth and side lobe level.

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gold-MUSIC Based DOA Estimation and Multiuser Detection of DS-CDMA System with Optimal Beamformer ULA Antenna

Dey

Nandi

2019

Wireless Pers Commun

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VAE/MPM/GA Technique for DoA Estimation Using Optimized Antenna Arrays

Cited by 4 publications

References 9 publications

Optimized VAA Based Synthesis of Elliptical Cylindrical Antenna Array for SLL Reduction and Beam Thinning Using Minimum Number of Elements

Optimized VAA Based Synthesis of Elliptical Cylindrical Antenna Array for SLL Reduction and Beam Thinning Using Minimum Number of Elements

High-Resolution and Large-Detection-Range Virtual Antenna Array for Automotive Radar Applications

gold-MUSIC Based DOA Estimation and Multiuser Detection of DS-CDMA System with Optimal Beamformer ULA Antenna

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