Filters








1,245 Hits in 6.1 sec

Speed-Sensitive Weighting Algorithm for Digital Beamforming of Adaptive Antenna Arrays

Shahriar Shirvani Moghaddam, Mahyar Shirvani Moghaddam
2011 Wireless Engineering and Technology  
This article proposes a speed-sensitive adaptive algorithm for estimating the weights of smart antenna systems based on least mean squares (LMS) or constant modulus (CM) algorithms.  ...  One of the main objectives of adaptive antenna array processing is reducing the computational complexity and convergence time in a joint state.  ...  Samaneh Movassaghi (University of Technology, Sydney) for the great help she provided.  ... 
doi:10.4236/wet.2011.23024 fatcat:a6ncwhq2lrdf7krbe6kugghtdy

PERFORMANCE ANALYSIS OF DIGITAL BEAMFORMING ALGORITHMS

Sushma K M .
2014 International Journal of Research in Engineering and Technology  
better than the conventional Least Mean Square algorithm with respect to reduced complexity in beam formation, making them suitable for high speed digital communication systems.  ...  The study documented in this paper shows the performance of variants of the Least Mean Square (LMS) Algorithm based approaches, in the realm of beam formation, used earlier in adaptive filtering, aiming  ...  Antenna arrays employ adaptive weighting algorithms that change the weights based on the received signals to increase the performance of the array.  ... 
doi:10.15623/ijret.2014.0315168 fatcat:2zmzmzytezepxoir5cko6ghfru

Adaptive Array Beamforming Using An Enhanced Rls Algorithm

Peter Chuku
2018 Zenodo  
The performance of an enhanced Recursive Least Squares (RLS) algorithm which takes into account an enhanced gain factor of the RLS algorithm is evaluated in this paper for adaptive array beamforming.  ...  They are able to achieve this by the use of beamforming algorithms.  ...  ACKNOWLEDGMENT The authors would like to acknowledge Tshwane University of Technology for providing research facilities and equipment for this study.  ... 
doi:10.5281/zenodo.1199364 fatcat:tkidnkaonvbubbbnbn5jngwpwm

Adaptive Array Beamforming Using an Enhanced RLS Algorithm

Peter Chuku, Thomas Olwal, Karim Djouani
2018 International Journal on AdHoc Networking Systems  
The performance of an enhanced Recursive Least Squares (RLS) algorithm which takes into account an enhanced gain factor has been evaluated in this paper for adaptive array beamforming.  ...  They are able to achieve this by the use of beamforming algorithms.  ...  ACKNOWLEDGMENT The authors would like to acknowledge Tshwane University of Technology for providing research facilities and equipment for this study.  ... 
doi:10.5121/ijans.2018.8101 fatcat:hugicfm4gfcc7eq3fc5f6qhopu

Adaptive beamformers using 2D-novel ULA for cellular communication

Veerendra Dakulagi, Mukil Alagirisamy
2019 SN Applied Sciences  
This paper presents the use of a novel two dimensional (2D) uniform linear array for adaptive beamforming algorithms.  ...  We used this novel antenna configuration to study the popular adaptive beamforming algorithms, namely, least mean square algorithm (LMS) and least normalized mean square algorithm (NLMS) and also proposed  ...  An antenna radiation pattern (also called as beam) formed by digital signal processor is known as digital beamforming. Figure 1 shows the analog (a) and digital beamforming (b) structures.  ... 
doi:10.1007/s42452-019-1009-z fatcat:gfex2cz72nca7arx7cgpozxvqy

Trends in Adaptive Array Processing

Hema Singh, Rakesh Mohan Jha
2012 International Journal of Antennas and Propagation  
It provides a comprehensive description of various beam-forming schemes, adaptive algorithms to adjust the required weighting on antenna elements, direction-of-arrival estimation methods, including their  ...  Enormous progress has been made during the past five decades in the area of adaptive array processing. Increased computational power has resulted in many practical applications of optimum algorithms.  ...  The adaptive array processing with digitally sampled data has shown incredible improvement in convergence speed.  ... 
doi:10.1155/2012/361768 fatcat:6vg46f632za2velvcwbsfdz3se

Beamforming in Wireless Communication Standards: A Survey

G. Charis, N. Showme
2017 Indian Journal of Science and Technology  
The implementation of hybrid beamforming technologies in large antenna arrays in these frequencies has yielded good performance.  ...  Advanced hybrid beamforming algorithm uses both analog and digital beamforming methods and not only offers highly directional beam to overcome propagation loss, but also advanced digital domain processing  ...  For implementing it, an advanced hybrid beamforming algorithm is described 6, 29 , which uses both analog and digital beamforming methods.  ... 
doi:10.17485/ijst/2017/v10i5/99018 fatcat:n2popxrtg5fz3ls36tq56rwruq

New Algorithms for Beam Formation and Its Comparison

Kishore M, H. M. Guruprasad, Ramesh K
2012 International Journal of Computer Applications  
One approach to increasing capacity and coverage zones for the servicing wireless station is to use smart antennas.  ...  Sophisticated adaptive beamforming techniques can be applied to point the array's beam in the desired look direction while simultaneously nulling out the interfering signal.  ...  .It also consists of a uniform linear antenna array for which the current amplitudes are adjusted by a set of complex weights using an adaptive beamforming algorithm.  ... 
doi:10.5120/8022-0804 fatcat:dmpvvvlxprf3zcpede3uba7gka

DVB-S Signal Tracking Techniques for Mobile Phased Arrays

Koen C. H. Blom, Marcel D. van de Burgwal, Kenneth C. Rovers, Andre B. J. Kokkeler, Gerard J. M. Smit
2010 2010 IEEE 72nd Vehicular Technology Conference - Fall  
An extended version of the Constant Modulus Algorithm (CMA) algorithm is used to adapt the steering vector weights to compensate for those deviations.  ...  A system that uses adaptive beamforming techniques for mobile Digital Video Broadcasting Satellite (DVB-S) reception is proposed in this paper.  ...  The adaptive array algorithm compensates for those deviations by altering the steering vector weights of the beamformer.  ... 
doi:10.1109/vetecf.2010.5594146 dblp:conf/vtc/BlomBRKS10 fatcat:wdzrppecyndxpiwc3wuki6j6cq

Beamforming techniques for massive MIMO systems in 5G: overview, classification, and trends for future research

Ehab Ali, Mahamod Ismail, Rosdiadee Nordin, Nor Fadzilah Abdulah
2017 Frontiers of Information Technology & Electronic Engineering  
Massive multiple-input multiple-output (MIMO) systems combined with beamforming antenna array technologies are expected to play a key role in next-generation wireless communication systems (5G), which  ...  importance of beamforming techniques in massive MIMO systems for eliminating and resolving the many technical hitches that massive MIMO system implementation faces.  ...  Adaptive beamforming algorithms: blind algorithms versus non-blind algorithms In beamforming antenna arrays, signals received at each antenna element of the antenna array are adaptively built up to enhance  ... 
doi:10.1631/fitee.1601817 fatcat:5kld5arndvfovazlghdbjuccka

A Simple Adaptive Beamforming Algorithm with interference Suppression

K. Meena alias Jeyanthi, A. P. Kabilan
2009 International Journal of Engineering and Technology  
We have modeled a linear array of antennas for 20°Half Power Beam Width (HPBW) and obtained the beam formation with digital modulation of 16 point Quadrature Amplitude Modulation (QAM).This modulation  ...  Modeling and simulation of uniform linear array using Matrix Inversion-Normalized Least Mean Square (MI-NLMS) adaptive beam forming with minimum Bit Error Rate (BER) is developed for smart antenna applications  ...  Matrix Inversion Normalized Least Mean Square (MI-NLMS) adaptive beamforming algorithm was developed for smart antenna application [4] .  ... 
doi:10.7763/ijet.2009.v1.12 fatcat:qqjb2vmts5fgrmsrkt6zlg4juy

Review Of Digital Beamforming Algorithms Using XSG (Xlinx System Generator)

2020 International journal for research in engineering application & management  
Elimination of interference, reduction of energy consumption and support for high speed data transmission are benefits of this technology.  ...  Adaptive spacetime processing (STAP) with digital lowering converters, IQ beam formatter and complex minimal square mean algorithm (LMS) has been approved and planned on the FPGA (XGA) platform.  ...  The process of finding suitable weights is called beamforming, because the choice of weights controls sensitivity of the antenna array in direction and frequency There are three kinds of smart antennas  ... 
doi:10.35291/2454-9150.2020.0311 fatcat:olqr7icqirdjrmtiqqxm5pbvoy

A Robust Design for Aperture-Level Simultaneous Transmit and Receive with Digital Phased Array

Mingcong Xie, Xizhang Wei, Yanqun Tang, Dujuan Hu
2021 Sensors  
Aperture-level simultaneous transmit and receive (ALSTAR) attempts to utilize adaptive digital transmit and receive beamforming and digital self-interference cancellation methods to establish isolation  ...  This paper proposes an adaptive random group quantum brainstorming optimization (ARGQBSO) algorithm to simplify the array design and improve the overall performance.  ...  Acknowledgments: The authors are sincerely grateful to the editor and anonymous reviewers for their insightful and constructive comments that helped us improve this work greatly.  ... 
doi:10.3390/s22010109 pmid:35009651 pmcid:PMC8747313 fatcat:dlhiqw3kmffhnetmzyxdr5de6q

Fundamentals of Narrowband Array Signal Processing [chapter]

Zeeshan Ahmad
2021 Adaptive Filtering - Recent Advances and Practical Implementation  
We first develop a general signal model for narrowband adaptive arrays and discuss the beamforming operation.  ...  Finally, we discuss various types of adaptive filtering algorithms.  ...  Adaptive beamforming is a subclass of digital beamforming.  ... 
doi:10.5772/intechopen.98702 fatcat:jeb4t2tjnzd2rfs7sov2v5s2i4

Elman Recurrent Neural Network Application in Adaptive Beamforming of Smart Antenna System

Adheed H., Sulaiman Ahmed
2015 International Journal of Computer Applications  
In this paper an artificial Elman Recurrent Neural Network (ERNN) is used for smart antenna adaptive beamforming.  ...  Neural network is used to calculate the optimum weights of uniform linear array antenna that steer the radiation pattern of the antenna by directing multiple narrow beams toward the desired users and make  ...  Where, A/D refer to analog to digital convertor ,w 0 …..w M-1 is the weights of antenna array that calculated by the adaptive algorithm of DSP unit to steer maximum radiation of antenna array toward the  ... 
doi:10.5120/ijca2015907041 fatcat:cnbpyzn73ndwhklqjqpy4k3dou
« Previous Showing results 1 — 15 out of 1,245 results