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Adaptive Beamforming Using the Reconfigurable MONTIUM TP

Marcel D. van de Burgwal, Kenneth C. Rovers, Koen C.H. Blom, Andre B.J. Kokkeler, Gerard J.M. Smit
2010 2010 13th Euromicro Conference on Digital System Design: Architectures, Methods and Tools  
In this paper, we present a reconfigurable Multi-processor System-on-Chip based solution for phased array processing that supports advanced tracking mechanisms to continuously receive signals with a mobile  ...  Today, digital hardware has become powerful enough to perform the massive number of operations required for real-time digital beamforming.  ...  The CAµS architecture presented in [23] is a hybrid architecture consisting of an FPGA and a Digital Signal Processor (DSP).  ... 
doi:10.1109/dsd.2010.13 dblp:conf/dsd/BurgwalRBKS10 fatcat:dbjuetgllzarbg6ijq3cwxo5yy

Mobile satellite reception with a virtual satellite dish based on a reconfigurable multi-processor architecture

M.D. van de Burgwal, K.C. Rovers, K.C.H. Blom, A.B.J. Kokkeler, G.J.M. Smit
2011 Microprocessors and microsystems  
Today, digital hardware has become powerful enough to perform the massive number of operations required for real-time digital beamforming.  ...  With the continuously decreasing price per transistor, high performance signal processing has become available by using multi-processor architectures.  ...  Acknowledgment The authors thank Fasil Taddesse for his contribution in the system level implementation of the processing chain.  ... 
doi:10.1016/j.micpro.2011.08.005 fatcat:yrgzhowhwzcp3ftqxca37kosq4

Wideband speech coding with hybrid digital-analog transmission

Matthias Rungeler, Fabian Kleifgen, Peter Vary
2015 2015 23rd European Signal Processing Conference (EUSIPCO)  
By experimental verification it is shown that the HDA concept may outperform conventional purely digital transmission systems at all channel qualities while additionally eliminating the quality saturation  ...  Thus, even in clear channel conditions, the quality of the decoded speech signal is limited due to the quantization errors.  ...  Acknowledgement Thanks to Michael Czarnetzki for programming support and fruitful discussions.  ... 
doi:10.1109/eusipco.2015.7362490 dblp:conf/eusipco/RungelerKV15 fatcat:bpy6yd4frnf5hhyvsiicqshvva

Envelope Following-Based RF Transmitters Using Switching-Mode Power Amplifiers

J.-K. Jau, Y.-A. Chen, T.-S. Horng, J.-Y. Li
2006 IEEE Microwave and Wireless Components Letters  
The experimental results show that the proposed transmitter can deliver a 1.9-GHz CDMA2000 1 signal with high adjacent channel power ratio, low error vector magnitude, and high power added efficiency over  ...  The use of predistorted envelope and quadrature-modulated signals can linearize the nonlinear behavior with fairly high average efficiency.  ...  The modulator mainly relies on a vector signal generator equipped with a two-channel digital-to-analog converter (DAC).  ... 
doi:10.1109/lmwc.2006.879471 fatcat:m56seywkjzhsjj4mu6uonhjqiu

An Integrated Photorefractive Analog Matrix-Vector Multiplier for Machine Learning

Elger A. Vlieg, Lucas Talandier, Roger Dangel, Folkert Horst, Bert J. Offrein
2022 Applied Sciences  
AI is fueling explosive growth in compute demand that traditional digital chip architectures cannot keep up with.  ...  Analog crossbar arrays enable power efficient synaptic signal processing with linear scaling on neural network size.  ...  Acknowledgments: We thank the members of the Binnig and Rohrer Nanotechnology Center (BRNC) operations team for their support. Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/app12094226 doaj:c3613604aaf547c584f5ed0ba89a9af1 fatcat:wxodoedmmbaajesjlxwgdumsdm


Hao Peng, Ziqiang Yang, Tao Yang
2012 Progress In Electromagnetics Research Letters  
We also propose a calibration technique based on support vector regression (SVR) for the following reasons: The nonlinearity of diode detectors and the asymmetry of six-port junctions can cause measurement  ...  The output power of the limiting amplifier module roughly maintains a constant value via a saturated amplifier for different input power levels and signal frequencies.  ...  The digital pulse frequency measurement module, which is based on an equally accurate measurement frequency for counting the number of pulses within a certain period, is applicable to instantaneous frequency  ... 
doi:10.2528/pierl12040504 fatcat:m353grfuxnbb5p3dh3hnhnj5b4

Single photonic perceptron based on a soliton crystal Kerr microcomb for high-speed, scalable, optical neural networks [article]

Xingyuan Xu, Mengxi Tan, Bill Corcoran, Jiayang Wu, Thach G. Nguyen, Andreas Boes, Sai T. Chu, Brent E. Little, Roberto Morandotti, Arnan Mitchell, Damien G. Hicks, David J. Moss
2020 arXiv   pre-print
We test the perceptron on simple standard benchmark datasets, handwritten-digit recognition and cancer-cell detection, achieving over 90% and 85% accuracy, respectively.  ...  operation involving full matrix multiplication for applications such as real-time massive data processing for unmanned vehicle and aircraft tracking.  ...  at saturation point.  ... 
arXiv:2003.01347v1 fatcat:gqrytaaaxbh3zdch7qxceyf6si

FPGA Implementation of DTC Control Method for the Induction Motor Drive

Czeslaw T. Kowalski, Jacek Lis, Teresa Orlowska-Kowalska
2007 EUROCON 2007 - The International Conference on "Computer as a Tool"  
Therefore developing of custom-built digital interfaces as well as digital data processing blocks and sometimes even integration of ADC converters into one integrated circuit is necessary.  ...  The use of CORDIC algorithm for some mathematical operations in the DTC method is described. Experimental test results of this drive control structure realised in FPGA are demonstrated.  ...  CONCLUSIONS Applying FPGA for electric motor control seems is an interesting alternative to the recently used digital signal processors.  ... 
doi:10.1109/eurcon.2007.4400657 fatcat:rksgqeruh5a77ed6y2zp5lkez4

Design and Implementation of WiMAX Baseband System [chapter]

Zhuo Sun, Xu Zhu, Rui Chen, Zhuoyi Chen, Mingli Peng
2012 Advanced Transmission Techniques in WiMAX  
The mainstream design of receiver proceed as follows: sampling the analog signal in the intermediate frequency, then down-converting the digital signal to baseband, finally demodulating the digital baseband  ...  Moreover, there may be CFR (Crest Factor Reduction) and DPD (Digital Pre-Distortion ) modules before converting to analog signal.  ...   DSP A digital signal processor (DSP) is a specialized microprocessor with an optimized architecture for the fast operational needs of digital signal processing.  ... 
doi:10.5772/28805 fatcat:hqvhvy5rjvfsteuiwg7ihk6zwy

Photonic extreme learning machine by free-space optical propagation

Davide Pierangeli, Giulia Marcucci, Claudio Conti
2021 Photonics Research  
Photonic brain-inspired platforms are emerging as novel analog computing devices, enabling fast and energyefficient operations for machine learning.  ...  We experimentally demonstrate learning from data on various classification and regression tasks, achieving accuracies comparable with digital kernel machines and deep photonic networks.  ...  Santos for technical support in the laboratory. Disclosures. The authors declare no conflicts of interest.  ... 
doi:10.1364/prj.423531 fatcat:do6rbtjcfbgwlmexf63bieuk24

Analog computation via neural networks

Hava T Siegelmann, Eduardo D Sontag
1994 Theoretical Computer Science  
Sontag, Analog computation via neural networks, Theoretical Computer Science 131 (1994) 331-360. 0304-3975/94/$07.00 0 1994-Elsevier Science B.V. All rights reserved SSDI 0304-3975(93)E0165-Z  ...  In vector form, a generalized processor network D updates its processors via the dynamic equation x + =.0x, 4, where x is the current state of the network (a vector), u is an external input (also possibly  ...  As for the saturation, one gate, pU, is sufficient for the integer part.  ... 
doi:10.1016/0304-3975(94)90178-3 fatcat:nd5xeibb2jec5c7stfcjwd4j5m

AltiVec extension to PowerPC accelerates media processing

K. Diefendorff, P.K. Dubey, R. Hochsprung, H. Scale
2000 IEEE Micro  
for digital signal processing; • saturation or modulo arithmetic; • a four-operand, nondestructive instruction format (three sources, one destination); and • modeless operation for zero overhead use of  ...  digital signal processing (DSP) domains. These include error correction, bit-packing kernels, and many others.  ... 
doi:10.1109/40.848475 fatcat:eozoqwxm5bgxrigtmclbo3hkrm

Beam position feedback system for the advanced photon source

Y. Chung
1994 AIP Conference Proceedings  
The systems consist of 20 VME crates distributed around the ring, each running multiple digital signal processois (DSP) running at 4kHz sampling rate with a proportional, integral, and derivative (PID)  ...  The effect of the eddy current induced in the relatively thick (1/2") vacuum chamber by the AC corrector magnet field for local feedback systems is compensated by digital filters.  ...  The digital signal processors then calculate the corrector strengths and control the corrector power supplies.  ... 
doi:10.1063/1.46962 fatcat:bfvhy3xlrfccxeiariyqpzdafy

Computer Control Of A PWM Induction Machine Drive System

Salah Ramadan
1993 International Conference on Aerospace Sciences and Aviation Technology  
The aim of this paper is to study and realize a universal control scheme for a pulse width modulated drive system using the capability of digital computation in real time.  ...  The implementation of the circuit to produce the firing pattern for the pulse width modulated inverter depends on voltage signals corresponding to the phase voltage instead of phase currents in order to  ...  The current vector coordinator CVC supports the pulse width modulation unit PWM with the threephase signals in order to give the wanted pattern signals for the pulse width inverter PWI.  ... 
doi:10.21608/asat.1993.25655 fatcat:ianq2tt74zarphggkcv5hmjkrq

Democracy in action: Quantization, saturation, and compressive sensing

Jason N. Laska, Petros T. Boufounos, Mark A. Davenport, Richard G. Baraniuk
2011 Applied and Computational Harmonic Analysis  
and digital imagers in certain applications.  ...  The key hallmark of CS that has been the focus of the community so far is the fact that CS enables sub-Nyquist sampling for signals, images, and other data that have a sparse representation in some basis  ...  As digital processors have become smaller and more powerful, their increased capabilities have inspired applications that require the sampling of ever-higher bandwidth signals.  ... 
doi:10.1016/j.acha.2011.02.002 fatcat:usvsunf7lbdojo4hnt4ieyhyjq
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