985 Hits in 11.3 sec

Regulated-Element Frost Beamformer for Vehicular Multimedia Sound Enhancement and Noise Reduction Applications

Sunday C. Ekpo, Bamidele Adebisi, Andrew Wells
2017 IEEE Access  
This paper presents a low-carbon adaptive broadband beamforming algorithm called the regulated-element Frost beamformer.  ...  A key requirement of an adaptive sensor array involves the ability to deterministically adjust the directional response of the array to reduce noise and reverberations, null interferences, and enhance  ...  The generic architecture of an adaptive broadband array comprises an array of sensors in tandem with tapped-delay lines and finite impulse response filter networks [13] .  ... 
doi:10.1109/access.2017.2775707 fatcat:2wiob5ctnfh7remzulskx6auxq

Broadband Gsc Beamformer With Spatial And Temporal Decorrelation

Choo-Leng Koh, Soydan Redif
2009 Zenodo  
Publication in the conference proceedings of EUSIPCO, Glasgow, Scotland, 2009  ...  This results in systems with a large number of sensors, M, followed by tap-delay lines (TDLs) of considerable length L.  ...  The simulated scenario contains a signal of interest which illuminates a M = 4 linear equispaced sensor array from broadside.  ... 
doi:10.5281/zenodo.41829 fatcat:ydlgos7epbffpgbimu4j75r76u

Adaptive Wideband Beamforming Based on Digital Delay Filter

Zeeshan Ahmad, Song Yaoliang, Qiang Du
2016 Journal of Microwaves, Optoelectronics and Electromagnetic Applications  
A novel adaptive wideband beamforming method is proposed, where beamforming is achieved by LMS based spacetime adaptive filtering algorithm.  ...  Conventional broadband beamforming requires desired signal to be incident from the broadside i.e. direction normal to the array.  ...  ACKNOWLEDGMENT The authors gracefully acknowledge the support of the National Natural Science Foundation (NSFC) Project (61271331) and project (61071145) of China.  ... 
doi:10.1590/2179-10742016v15i3630 fatcat:fsk3m22fcracvkdhver524blyu

Smart Antenna for Wireless Communication Systems using Spatial Signal Processing

Ayodele S. Oluwole, Viranjay M. Srivastava
2017 Journal of Communications  
In addition to beamforming, this research work also estimate the DOA arrays of smart antenna based on uniform linear array.  ...  This is based on directional specifications of the second order spatial analysis of communication radio channel. Space-time processing decreases the interference and improves the desired signal.  ...  One of the advantages of spatial signal processing is that wideband beamforming can be successfully performed without tapped-delay lines or frequency filters.  ... 
doi:10.12720/jcm.12.6.328-339. fatcat:tbhmyerezbeoxj5ggfwh7shkze

Analysis of the least squares approach to broadband beamspace beamforming

Yuling Li, Des McLernon, Ali Zaidi
2017 2017 International Conference on Recent Advances in Signal Processing, Telecommunications & Computing (SigTelCom)  
In this paper, we present a comprehensive comparison of different structures for broadband beamforming. We focus on both the tapped delay line (TDL) and the least squares (LS), beamspace approaches.  ...  We show how to mitigate this via a reduced rank approximation of the autocorrelation matrix.  ...  Here M is the number of elements of the uniform linear array and N is the number of taps associated with each sensor.  ... 
doi:10.1109/sigtelcom.2017.7849787 fatcat:3dntzjo3a5d7jhi5txbgxrrs7q

Frequency Invariant Uniform Concentric Circular Arrays with Directional Elements

Bin Liao, Kai-Man Tsui, Shing-Chow Chan
2013 IEEE Transactions on Aerospace and Electronic Systems  
Consequently, the whole UCCA can be viewed as a virtual uniform circular array (UCA) with desired element directivity for broadband processing.  ...  By treating the sensors along the radial direction of the UCCA as linear subarrays and using appropriately designed beamformers, each subarray is transformed to a virtual element with appropriate directivity  ...  One of the most popular approaches for adaptive broadband beamforming is to employ tapped-delay lines or linear transversal filters with adaptive coefficients to generate appropriate beampatterns for the  ... 
doi:10.1109/taes.2013.6494386 fatcat:hcblb6dpmvbt5aldqochv3nkfi

Estimation of direction of arrival (DOA) using real-time Array Signal Processing

Md. Shahedul Amin, Ahmed-Ur-Rahman, Saabah-Bin-Mahbub, Khawza I. Ahmed, Zahidur Rahim Chowdhury
2008 2008 International Conference on Electrical and Computer Engineering  
Array signal processing (ASP) is a relatively new technique in Digital Signal Processing (DSP) with many potential applications in communication and speech processing.  ...  Spectral-based algorithm and subspace-based methods are implemented using two widely used softwares, MATLAB and NI LabVIEW, to demonstrate the feasibility of introducing the topics in course curriculum  ...  The conventional beamformer is a natural extension of classical Fourier-based spectral analysis to sensor array data.  ... 
doi:10.1109/icece.2008.4769244 fatcat:hbzhcttmmjhjbiagrc3qtkmsrm

A Literature Survey Different Algorithms of MUSIC and MVDR DOA Estimation

Bhupenmewada, Prof. Kamal Niwaria, Dr. Manish Jain
2018 Zenodo  
These ways use a very small variety of measurements within the form of random projections of the sensing element knowledge beside one full wave form recording at one amongst the sensors  ...  This paper begins with a brief introduction about a smart antenna and majorly in this paper different type of DOA algorithms.  ...  ANTENNA ARRAY Smart antennas are based on using multiple antenna elements configured in an array. The configuration of the array has a direct effect on the performance of the system.  ... 
doi:10.5281/zenodo.3361960 fatcat:a2ejtjduozdpvpeup7xmstnl6e

Trends in Adaptive Array Processing

Hema Singh, Rakesh Mohan Jha
2012 International Journal of Antennas and Propagation  
The effects of various types of errors on the performance of an array system are illustrated along with their remedial measures.  ...  The present paper deals with many facets of array signal processing and adaptive beam forming.  ...  Wideband Beamformers. For broadband applications, tapped delay line transversal filters [5] instead of quadrature weights are employed for processing of the array elements.  ... 
doi:10.1155/2012/361768 fatcat:6vg46f632za2velvcwbsfdz3se

Non-linear, adaptive array processing for acoustic interference suppression

Elizabeth Hoppe, Michael Roan
2009 Journal of the Acoustical Society of America  
A method is introduced where blind source separation of acoustical sources is combined with spatial processing to remove non-Gaussian, broadband interferers from space-time displays such as bearing track  ...  The algorithm performance is compared to adaptive beamforming techniques such as minimum variance distortionless response beamforming.  ...  EXPERIMENTS A. Two voices with equal signal strength Experiments were performed in an anechoic chamber. A 24 element linear array was used to collect the data.  ... 
doi:10.1121/1.3126925 pmid:19507966 fatcat:m4gbujd3crc2jjh7nlc73wvinq

Optimum broadband beamforming for coherent broadband signals and interferences

Monika Agrawal, Surendra Prasad
1999 Signal Processing  
The problem of optimum broadband beamforming using linear arrays is considered with a view to avoid signal cancellation that normally results when signal-correlated interferences are present in the environment  ...  The optimum approaches proposed here are based on a harmonic model for signals and interferences on the one hand, and a convenient characterization of the signal-free interference subspace from the observed  ...  The broadband array con"guration with a tapped delay line for spatio-temporal "ltering. y(k) " X X 4p =l i=l 0 ) k ) LM !  ... 
doi:10.1016/s0165-1684(99)00020-1 fatcat:ivaeofzhgngdtpp24jj4eykriq

A microphone array system for multimedia applications with near-field signal targets

Yahong Rosa Zheng, R.A. Goubran, M. El-Tanany, Hongchi Shi
2005 IEEE Sensors Journal  
A microphone array beamforming system is proposed for multimedia communication applications using four sets of small planar arrays mounted on a computer monitor.  ...  A new virtual array approach is employed such that the original signals received by the array elements are weighted and delayed to synthesize a large, nonuniformly spaced, harmonically nested virtual array  ...  Each subarray is followed by a broadband near-field beamformer using a tapped delay line designed for the corresponding subband.  ... 
doi:10.1109/jsen.2005.858936 fatcat:syhsfrq6rrd3pknawu5fyhlcbq

Relevance of polynomial matrix decompositions to broadband blind signal separation

Soydan Redif, Stephan Weiss, John G. McWhirter
2017 Signal Processing  
with classical broadband methods.  ...  solutions that generalise well-known narrowband techniques based on the EVD.  ...  Acknowledgements This work was supported in parts by the Engineering and Physical Sciences Research Council (EPSRC) Grant number EP/K014307/1 and the MOD University Defence Research Collaboration in Signal Processing  ... 
doi:10.1016/j.sigpro.2016.11.019 fatcat:r6ndqof47bfv3p4zey426tes74


2002 Journal of Computational Acoustics  
By coupling each transducer node in a distributed array with a microprocessor, and networking them together, embedded parallel processing for adaptive beamformers can significantly reduce execution time  ...  Rapid advancements in adaptive sonar beamforming algorithms have greatly increased the computation and communication demands on beamforming arrays, particularly for applications that require in-array autonomous  ...  Acknowledgements The support provided by the Office of Naval Research on grant N00014-99-1-0278 is acknowledged and appreciated, as is an equipment grant from Nortel Networks.  ... 
doi:10.1142/s0218396x02001565 fatcat:pf2mn6gmrndyrlqb7kl4ih2fiq

Superdirective Robust Algorithms' Comparison for Linear Arrays

Danilo Greco, Andrea Trucco
2020 Acoustics  
Frequency-invariant beam patterns are often required by systems using an array of sensors to process broadband signals.  ...  We present a comparison between two methods that deal with a data-independent beamformer based on a filter-and-sum structure.  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/acoustics2030038 doaj:886461352b5b464ca991776a97706234 fatcat:fwh7vz75jnaxfjq7qvmtz2bszm
« Previous Showing results 1 — 15 out of 985 results