Discrete-time simulation of smart antenna systems in Network Simulator-2 Using MATLAB and Octave

SIMULATION ◽  
2010 ◽  
Vol 87 (11) ◽  
pp. 932-946 ◽  
Author(s):  
Fulvio Babich ◽  
Massimilliano Comisso ◽  
Aljosa Dorni ◽  
Flavio Barisi ◽  
Marco Driusso ◽  
...  
Keyword(s):  
Discrete Time ◽  
Antenna Arrays ◽  
Channel Coding ◽  
Smart Antenna ◽  
Discrete Event ◽  
Mesh Network ◽  
Adaptive Antenna ◽  
Network Simulator ◽  
Advantages And Disadvantages ◽  
Antenna Systems

This paper presents two platforms that exploit the scalability properties of Network Simulator-2 for the discrete-event simulation of a telecommunication network, and the modeling capabilities of two development tools for the discrete-time implementation of adaptive antenna arrays at the physical layer. The two tools are the proprietary MATLAB and the open source Octave, both of which are used to implement the physical antenna system, the beamforming algorithm, the channel coding scheme, and the multipath and fading statistics. The adopted approach enables detailed modeling of the antenna radiation pattern generated by each network node, thus improving the accuracy of the signal-to-interference ratio estimated at the receiver. This study describes the methods that can be adopted to interface MATLAB and Octave with Network Simulator-2, and discusses the advantages and disadvantages that characterize the integration of the two tools with Network Simulator-2. The proposed numerical platforms, which can be interfaced with any wireless network supported by Network Simulator-2, are used to investigate the possibility of exploiting smart antenna systems in a wireless mesh network to enable the coexistence of multiple simultaneous communications.

scholarly journals The features of the use of the waveguide radiators in smart antenna systems

2018 ◽  
Vol 26 (1) ◽  
pp. 89-92
Author(s):  
V. M. Morozov ◽  
V. I. Magro
Keyword(s):  
Integral Equation ◽  
Antenna Array ◽  
Antenna Arrays ◽  
Smart Antenna ◽  
Integral Equation Method ◽  
Thin Plates ◽  
Coupling Region ◽  
Five Elements ◽  
Antenna Systems ◽  
Selection Of

The features of the use of finite waveguide antenna arrays in the structure of modern smart antenna systems are considered. The paper deals with the problem of diffraction of an electromagnetic wave on a finite waveguide antenna array scanning in the E-plane. Antenna array consists of five radiating elements. The open ends of the waveguides are surrounded by a metal screen. The resonator coupling region was chosen as matching elements. The solution of the problem is carried out by the integral equation method on the basis of the selection of overlapping regions. The problem reduces to solving the Fredholm integral equation of the second kind. An array of infinitely thin plates and that of waveguides with a finite wall thickness are considered. The main regularities for choosing the optimal geometric dimensions of the antenna array are established. Studies were carried out for arrays with a number of elements from five to fifteen. The analysis of edge effects in the final antenna array is carried out. It is shown that the introduction of a resonator region into a five-element lattice makes it possible to expand the sector of the radiation angles and avoid the effect of blinding. It is shown that this statement is valid not only for five-element lattices, but also for arrays with a large number of radiating elements. The radiation patterns are calculated. The  coefficients of mutual coupling in an array with five elements are investigated. General recommendations for choosing optimal sizes of the resonator coupling region of radiators are considered.

scholarly journals USE OF ADAPTIVE ANTENNA ARRAYS FOR INCREASE THE THROUGHPUT IN LTE-A

2021 ◽  
pp. 17-25
Author(s):  
D. O. Makoveenko ◽  
S. V. Siden ◽  
V. V. Pyliavskyi
Keyword(s):  
Antenna Array ◽  
Antenna Arrays ◽  
Noise Analysis ◽  
Mobile Network ◽  
Base Station ◽  
Base Stations ◽  
Adaptive Antenna ◽  
Adaptive Antenna Arrays ◽  
Useful Signal ◽  
Antenna Systems

Context. The aim of the article is to analyze the throughput of the LTE-A mobile network on the uplink using an adaptive linear equidistant antenna array. Objective. Suggestions have been made for the possibility of using adaptive antenna arrays to increase bandwidth in LTE-A mobile networks and analyze the benefits of its use compared to the standard type of base station antenna Method. To achieve this result, a computer model of noise analysis of the mobile network in the form of a flat regular hexagonal antenna array consisting of 7 three-sector cells was developed. To estimate the benefit from the use of adaptive antenna arrays, two options were analyzed: when using a standard antenna array of the LTE-A network, and an adaptive linear equidistant antenna array. During the simulation, 100 random placements of subscribers of useful and interference signals were performed and the minimum, maximum and average gain from the use of adaptive antenna arrays was calculated. The average value of the gain for the adaptive antenna array in the direction of the subscriber station, which generates a useful signal of 5.69 dB more than the standard antenna array of the LTE-A network. At the same time, there is a significant reduction in the gain of the adaptive antenna in the direction of the interference subscriber stations, namely, for those with the highest interference level, the gain is 32.84 dB and 28.33 dB, respectively. To clearly show the gain in the qualitative characteristics of the network, a bandwidth analysis was performed for different types of antennas. The bandwidth distribution (transport block size) for 50 resource blocks using an adaptive equidistant linear antenna array compared to a standard antenna array is presented. Results. It is shown that due to the use of adaptive antenna systems, the average bandwidth increases from 11 Mbit/s to 35 Mbit / s for all types of distribution considered channels. Conclusions. The article proposes the use of adaptive antenna arrays to increase the bandwidth of the LTE-A network. The simulation of bandwidth for 50 resource blocks showed that in the presence of internal system interference when using standard antennas of base stations, the average bandwidth is from 11.2 Mbps to 12.3 Mbps. At the same time, due to the use of adaptive antenna systems, the average bandwidth increases from 11 Mbit/s to 35 Mbit/s for all types of multipath channels considered.

scholarly journals An Optimized Design of Antenna Arrays for the Smart Antenna Systems

2021 ◽  
Vol 69 (2) ◽  
pp. 1979-1994
Author(s):  
Fahd N. Al-Wesabi ◽  
Murad A. A. Almekhlafi ◽  
Huda G. Iskandar ◽  
Adnan Zain ◽  
Saleh Alzahrani ◽  
...  
Keyword(s):  
Antenna Arrays ◽  
Smart Antenna ◽  
Optimized Design ◽  
Antenna Systems

scholarly journals Antenna Arrays Principle and Solutions: Robust Control Approach

2008 ◽  
Vol 3 (2) ◽  
pp. 161 ◽  
Author(s):  
Florin Hutu ◽  
Sebastien Cauet ◽  
Patrick Coirault
Keyword(s):  
Antenna Arrays ◽  
Smart Antenna ◽  
Lyapunov Theory ◽  
Linear Matrix ◽  
Matrix Inequalities ◽  
Control Approach ◽  
Parameter Variations ◽  
A Chain ◽  
Lyapunov Theory Of Stability ◽  
Antenna Systems

This paper treats solutions on the ability of a chain of non identical oscillators to drive antenna arrays. Frequency approaches were studied in order to solve the problem of synchronization of the oscillators. However, in this article, a new structure of chain of oscillators is introduced. Secondly, Lyapunov theory of stability is used to design a dynamical controller guarantying the oscillators synchronization. The problem of synchronization is transformed into a problem of asymptotic stabilization for a nonlinear system. It is formulated as a system of linear matrix inequalities where the parameter variations of the two oscillators and their differences are modeled by polytopic matrices. The theoretical result is successfully applied to an array of transistor-based oscillators used in "smart antenna" systems.

scholarly journals ANTENNAS OF MOBILE TERMINALS IN MODERN MOBILE COMMUNICATION NETWORKS (OVERVIEW)

2019 ◽  
Author(s):  
Valentin Popov ◽  
Vladimir Skudnov ◽  
Alexey Vasilyev
Keyword(s):  
Mobile Communication ◽  
Antenna Arrays ◽  
Communication Systems ◽  
Mobile Station ◽  
Line Of Sight ◽  
Adaptive Antenna ◽  
Mobile Terminals ◽  
Mobile Communication Systems ◽  
Mobile Stations ◽  
Antenna Systems

In connection with the development of technology of mobile terminals (cell phones, smartphones, tablets, computers with wireless modems, etc.) in the standards of UMTS (3G) and LTE (4G) great attention of manufacturers of these devices is concentrating on the modernization and development of antenna systems of mobile stations (terminals). Currently, antenna systems of mobile stations is implementing on base of technology in form of complex configuration microstrip transmission lines, which ensure compliance with the requirements of modern wireless communication standards. Adaptive antenna arrays and MIMO antenna systems are implemented in mobile terminals for road and railway transport, which allow to achieve a sustainable reception of signals from the base stations. As you know, the difficult conditions for the propagation of radio waves in cellular mobile communication systems are associated with their absorption, multiple reflection and scattering. In these cases, the laws that are true for the line of sight conditions (LOS, Line of Sight) no longer work. The properties of antennas integrated into mobile terminals (mobile stations - MS (Mobile Station)) directly depend on the statistical characteristics of the environment and the location of the operating terminal relative to the spatial position of the user. Therefore, when designing MS antennas in UMTS and LTE mobile communication systems in the frequency ranges from 450 to 3700 MHz, it is important to consider all of the above factors.

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