A uniform rectangular array of isotropic sensors of stochastic gains: The hybrid Cramer-Rao bound for direction finding

2019 ◽  
Vol 146 (4) ◽  
pp. 2867-2867
Author(s):  
Dominic M. Kitavi ◽  
Kainam T. Wong
Keyword(s):  
Direction Finding ◽  
Rectangular Array ◽  
Cramer Rao Bound ◽  
Uniform Rectangular Array

scholarly journals Design of a Practical and Compact mm-Wave MIMO System with Optimized Capacity and Phased Arrays

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Tommaso Cella ◽  
Pål Orten ◽  
Torbjörn Ekman
Keyword(s):  
Phased Arrays ◽  
Mimo System ◽  
Reflector Antenna ◽  
Line Of Sight ◽  
Single Element ◽  
Rectangular Array ◽  
Link Budget ◽  
The Impact ◽  
Antenna Systems ◽  
Uniform Rectangular Array

In this paper we evaluate the feasibility of short range outdoor mm-wave MIMO links in the 70 GHz portion of the E-band (71–76 GHz). We use phased arrays in order to strongly reduce the impact of the multipath components, thus making the channel mainly line-of-sight (LOS). We design the array using a simple patch as a single element and simulate the performances for a 200 m link and a MIMO system with equal element spacing at the transmitter and the receiver. Each node of the MIMO system consists of a uniform rectangular array (URA) where the single element is a patch antenna, in order to achieve higher gains and narrow beams. Such configuration is much more compact compared to the antennas currently employed for the same bandwidth. We optimize the interelement distances at the transmitter and the receiver and evaluate the capacity achievable with different array sizes. The results show that, for the proposed link budget, capacity up to 29 bit/s/Hz is achievable at a range of 200 m, with practical dimensions. We also show that the beamforming capabilities make the design much more flexible than the single reflector antenna systems. In the last part of the paper, we verify that our antenna can also operate in rainy conditions and longer ranges.

scholarly journals Uniform Rectangular Array Synthesis and Optimization Using Modified Genetic Algorithm

2020 ◽  
Author(s):  
Mercy Sheeba J ◽  
S. Deepa
Keyword(s):  
Genetic Algorithm ◽  
Side Lobe ◽  
Beam Pattern ◽  
Side Lobe Level ◽  
Azimuthal Direction ◽  
Rectangular Array ◽  
Modified Genetic Algorithm ◽  
Simulation Results ◽  
Optimum Solution ◽  
Uniform Rectangular Array

This paper aims to synthesize a uniform rectangular array (URA) which spans beamwidth of -30∘ to 30∘ in the azimuthal direction with the interference direction as 40∘ in the azimuth plane. In this paper, a Modified Genetic Algorithm is proposed which works to produce a beam pattern with a narrow beamwidth, high directivity and maximized side lobe level (SLL) suppression. The simulation results for the proposed algorithm demonstrates that the synthesized beam pattern for a 16x16 URA at a frequency of 1 GHz converges to the desired optimum solution producing a maximum SLL suppression of -30dB.

scholarly journals Compressed Sensing PARALIND Decomposition-Based Coherent Angle Estimation for Uniform Rectangular Array

2019 ◽  
Vol 2019 ◽  
pp. 1-10
Author(s):  
Wu Wei ◽  
Xu Le ◽  
Zhang Xiaofei ◽  
Li Jianfeng
Keyword(s):  
Compressed Sensing ◽  
Data Storage ◽  
Estimation Algorithm ◽  
Doa Estimation ◽  
Spatial Smoothing ◽  
Rectangular Array ◽  
Propagator Method ◽  
Coherent Sources ◽  
2D Doa Estimation ◽  
Uniform Rectangular Array

In this paper, the topic of coherent two-dimensional direction of arrival (2D-DOA) estimation is investigated. Our study jointly utilizes the compressed sensing (CS) technique and the parallel profiles with linear dependencies (PARALIND) model and presents a 2D-DOA estimation algorithm for coherent sources with the uniform rectangular array. Compared to the traditional PARALIND decomposition, the proposed algorithm owns lower computational complexity and smaller data storage capacity due to the process of compression. Besides, the proposed algorithm can obtain autopaired azimuth angles and elevation angles and can achieve the same estimation performance as the traditional PARALIND, which outperforms some familiar algorithms presented for coherent sources such as the forward backward spatial smoothing-estimating signal parameters via rotational invariance techniques (FBSS-ESPRIT) and forward backward spatial smoothing-propagator method (FBSS-PM). Extensive simulations are provided to validate the effectiveness of the proposed CS-PARALIND algorithm.

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