scholarly journals On the selection of radiating elements for compact indoor massive‐multiple input multiple output base stations

2014 ◽  
Vol 8 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Xavier Artiga ◽  
Bertrand Devillers ◽  
Julien Perruisseau‐Carrier
Keyword(s):  
Multiple Input Multiple Output ◽  
Base Stations ◽  
Multiple Input ◽  
Input Multiple Output ◽  
Selection Of

scholarly journals Combined TOA/DOA for Location Estimation in MIMO System

2014 ◽  
Vol 68 (3) ◽  
Author(s):  
A. A. M. Isa ◽  
M. H. Othman ◽  
N. Z. Haron ◽  
M. S. M. Isa ◽  
M. S. I. M. Zin ◽  
...  
Keyword(s):  
Mimo System ◽  
Multiple Input Multiple Output ◽  
Location Estimation ◽  
Base Stations ◽  
P System ◽  
Time Of Arrival ◽  
Angle Measurements ◽  
Multiple Input ◽  
Input Multiple Output ◽  
Combined Technique

This paper proposes on the development of a combined location and positioning (L&P) system by combining range measurements and angle measurements for a multiple input multiple output (MIMO) system. The proposed combined technique called as hybrid multiple linear lines of position (HMLLOP) algorithm extends the fundamental idea of using the multiple linear lines of position (MLLOP) scheme when extra information in the form of direction of arrival (DOA) measurements at a minimum of three base stations (BSs) is available. The technique explores  the use of multiple lines of position (LOP) instead of circular LOP and determines new lower and upper bounds of DOA according to the measurements obtained from an MLLOP scheme which aims to minimize the DOA error caused by non-line of sight (NLOS) propagation. Simulation results have been provided that show that the proposed combined schemes outperform the range-only algorithm in terms of estimated location accuracy. It has been shown that time of arrival (TOA)-based location can be employed as a baseline location estimation technique, with additional DOA measurements being used to further improve accuracy.

Improved Location and Positioning in WiMAX Networks with Virtual Multiple Input Multiple Output Base Stations

2014 ◽  
Vol 20 (10) ◽  
pp. 1846-1850
Author(s):  
A. A. M. Isa ◽  
M. H. Othman ◽  
M. S. I. M. Zin ◽  
M. S. M. Isa ◽  
M. S. M. Saat ◽  
...  
Keyword(s):  
Multiple Input Multiple Output ◽  
Base Stations ◽  
Wimax Networks ◽  
Multiple Input ◽  
Input Multiple Output

scholarly journals Identification of Vehicle System Dynamics from the Aspect of Interaction between the Steering and the Suspension Systems

Machines ◽  
2022 ◽  
Vol 10 (1) ◽  
pp. 46
Author(s):  
Danijela Miloradović ◽  
Jovanka Lukić ◽  
Jasna Glišović ◽  
Nenad Miloradović
Keyword(s):  
Experimental Data ◽  
Spectral Analysis ◽  
Motor Vehicle ◽  
Multiple Input Multiple Output ◽  
Suspension System ◽  
Measuring System ◽  
Suspension Systems ◽  
Multiple Input ◽  
Input Multiple Output ◽  
Selection Of

Steering and suspension systems of a motor vehicle have very important mutual connections that have direct influence on a vehicle’s steerability, stability, comfort and life expectancy. These mechanical and functional couplings cause an intensive interaction between the two mentioned vehicle systems on a geometrical, kinematical and dynamical level. This article presents a study on nonparametric identification of dynamic interaction between the steering and the suspension system of a passenger vehicle. A specific methodology for experimental research in on-road conditions was designed that was in line with the research objectives and the applied measuring system. Experimental data were acquired for a curvilinear drive, with different constant driving speeds and on different roads. A multiple input/multiple output model for identification of the vehicle dynamics system from the aspect of interaction between the steering and the suspension system was developed. The analysis of experimental data was realized with the selection of a corresponding identification model, decoupling of model inputs and conditioned spectral analysis. The results of the conditioned spectral analysis of experimentally obtained data records indicate the level of interaction between the observed input and output parameters of the steering and the suspension systems to be in the frequency range below 30 Hz.

Compact modified ‘T’ slot circular patch quad band antenna for MIMO applications

2016 ◽  
Vol 9 (4) ◽  
pp. 865-873 ◽  
Author(s):  
Chithradevi Rajagopal ◽  
Sreeja Balakrishnapillai Suseela ◽  
Nafiza Noorullakhan ◽  
Radha Sankararajan
Keyword(s):  
Mutual Coupling ◽  
Multiple Input Multiple Output ◽  
Single Element ◽  
Frequency Bands ◽  
Circular Patch ◽  
Shorting Pin ◽  
Measurement Results ◽  
Multiple Input ◽  
Input Multiple Output ◽  
Selection Of

Compact modified T-slot circular patch antenna for multiple input multiple output (MIMO) applications, which has good response for four operating frequency bands is developed. Here the design consists of a circular patch with a new slot loaded T- shape on one side of the substrate and a feeder line on the other side of the substrate. A shorting pin is located between the patch and the feeder line. This proposed antenna resonates at the frequencies of 2, 4.8, 5.4, and 6.2 GHz covering the S-band, C-band, and LTE applications. The independent tuning of frequency bands is achieved by varying the length of the slots. By independent tuning of frequency bands, the selection of interested frequency band is achieved. The single element with miniaturized size of 1.945λ × 1.945 λ (30 × 30 mm2) is achieved including the feed line. The antenna has been tested for MIMO applications. The measured envelope correlation coefficient between the two elements, which are spaced 0.139 λ is <0.1(low correlation) and mutual coupling is found to be in the range of −20 dB to −80 dB. The simulation and measurement results of reflection coefficient, mutual coupling, and radiation pattern are presented.

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