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Reservation Based Joint Servicing of Real Time and Batched Traffic in Inter Satellite Link

Reservation Based Joint Servicing of Real Time and Batched T...

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systems of signals generating and processing in the field of on board communications

作者： S. N. Stepanov Umer Mukhtar Andrabi M. S. Stepanov Juvent Ndayikunda Moscow Technical University of Communications and Informatics Moscow Russia Central University of Kashmir Srinagar Jammu and Kashmir India University of Burundi Bujumbura Burundi

ISBN: (数字)9781728147727

ISBN: (纸本)9781728147734

The model for conjoint servicing of real time and batch arrival data streams by a satellite link is constructed. Request flows coming from subscribers for real time servicing are described by Engset model with intensity depending on the type of service. Request flows coming from subscribers for data transmission, follows Poisson model with batch arrivals. The duration of servicing of requests for real time and data transmission has exponential distribution with parameter depending on the type of servicing. The request for real time traffic transmission with some probability depending on the number of busy channels can be refused servicing despite availability of free channels. It allows to reserve transmission capacity for priority data traffic. In the framework of the constructed model, the formal definitions of main performance measures the conjoint traffic transmissions are introduced. These are formulated with help of values of probabilities of model's stationary states. The numerical algorithm of calculation of introduced performance measures by solving the system of state equations using Gauss-Zeidel iterative algorithm is introduced. The proposed model and the results of derived can be used for estimation of the parameters of reservation of transmission capacity of satellite link for given values of quality characteristics and volumes of real time and batched data traffics.

关键词： Satellite Link Multiservice Traffic Reservation Satellite links Legal Services transmission capacity Quality factor Real time data transmission Traffic Traffic data Probability

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FPGA implementation of 2D interactive sound communication system

FPGA implementation of 2D interactive sound communication sy...

引用

IEEE International conference on Signal processing, communications and Computing (ICSPCC)

作者： Minsu Kang Department of Electrical Engineering Seoul National University Seoul South Korea

A 2D interactive sound communication (2DISC) system and the associated system-on-chip are proposed in this paper. The system provides an intelligent way of communicating with stereophonic sound to enhance human cognitive ability during sound communication. The system generates stereophonic sound using mono sound sources and the positions of the listener and the speaker provided by a GPS. This stereophonic sound allows the listener to determine the position of the speaker simply by listening to the sound. Optimized stereophonic sound generating methods are embedded in the system, resulting in a small-sized design. The system can easily replace the currently popular communication systems that use the mono sound sources such as walkie-talkies or citizens' band transceivers. Several tests are carried out successfully using an FPGA board and a PC to demonstrate the applicability of the proposed system.

关键词： Global Positioning System Microphones Ear SDRAM Approximation methods Software field programmable gate arrays

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Experimental implementation of DPA attacks on AES design with Flash-based FPGA technology

Experimental implementation of DPA attacks on AES design wit...

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IEEE SSD International Multi-conference on systems, signals and Devices

作者： Najeh Kamoun Lilian Bossuet Adel Ghazel Cite technologique des Communication El Ghazala CIRTRA'COM lab SUPCOM Ariana Tunisia CIRTA'COM Lab Cité technoloziquc des Communications El Ghazala Ariana Tunisia IMS Lab ENSEIRB Bordeaux FRANCE

In this paper, authors conducted a successful differential power analysis DPA attack on an Advanced Encryption Standard AES hardware implementation on Flash-based FPGA technology. Correlation analysis method is used to reduce DPA attack data processing time. It is chosen between three methods analysing power consumption on DPA attacks. An experimental set-up is defined to implement on an FPGA board critical AES modules and DPA attack. As main contribution, this work proved the success of DPA attack on Flash-based FPGA. Experimental results showed that for different secret key values a maximum of correlation with the correct key is obtained during 20 mn of data processing time.

关键词： field programmable gate arrays

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Design and evaluation of FPGA based frequency demodulators

Design and evaluation of FPGA based frequency demodulators

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International conference on Advances in Computing, communications and Informatics (ICACCI)

作者： Senthilkumar E Manikandan J V.K. Agrawal Crucible of Research and Innovation (CORI) PES University Bangalore India

Communication systems are extensively used in a large number of applications such as radar, aerospace, naval/maritime communication, mobile communication and many more. The most important module in designing communication system includes design of modulators and demodulators. Frequency modulation (FM) is widely used for various applications ranging from radio communication to on-board systems for aerospace and spacecraft applications. FM demodulators are used to demodulate the FM signals transmitted from such systems. In this paper, a novel attempt is made to use Goertzel algorithm for FM demodulation and its performance is compared with the system designed using Fast Fourier Transform (FFT). Also a reusable Goertzel block based FM demodulator is proposed which reduces the hardware resources on increasing the number of frequencies to be detected. All the above mentioned systems are implemented on a Xilinx Virtex-5 board and their results are reported. 60-82% of hardware resources are saved on using proposed reusable Goertzel block based demodulator, which inturn saved the power consumption of the proposed design.

关键词： Frequency modulation Demodulation Hardware field programmable gate arrays Signal processing algorithms Algorithm design and analysis

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Low-Effort On-board Memoryless Predistortion Techniques for SATCOM

Low-Effort On-Board Memoryless Predistortion Techniques for ...

引用

SCC 2017;11th International ITG conference on systems, communications and Coding

作者： Ovais Bin Usman Thomas Delamotte Andreas Knopp Munich University of the Bundeswehr Chair of Signal Processing

ISBN: (纸本)9783800743629

The emergence of on-board processors (OBPs) allows the manipulation of signals at the satellite transponder which can lead to efficient implementation of digital predistortion techniques. However, due to limitations like the weight, power and radiation hardening requirements of the hardware in satellites, generally less powerful digital signal processors (DSPs) and field programmable gate arrays (FPGAs) are employed onboard. This paper provides a comparison between the existing memoryless Pth order inverse predistortion technique and an improved low-effort and less complex Kth order memoryless polynomial predistortion technique, both of which can be directly implemented in satellites using OBPs. The latter predistorter uses a modified LMS algorithm to find the optimum predistorter which leads to a lower residual error and bit error ratio (BER) with a faster convergence as compared to traditional LMS algorithms. The simulation results presented show that by implementing digital predistortion on-board we can not only achieve gains in the system BER performance but also in the power efficiency due to the reduced input back-off (IBO) and output back-off (OBO) requirements of the HPA.

关键词： Through-silicon vias Three-dimensional displays Delays Ring oscillators Trojan horses Security

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Portable 8 channel DAQ system for Cd(Zn)Te sensors

Portable 8 channel DAQ system for Cd(Zn)Te sensors

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IEEE Symposium on Nuclear Science (NSS/MIC)

作者： D. S. Hatzistratis C. P. Lambropoulos V. A. Gnatyuk C. Potiriadis Electronics Sensors and Communications Laboratory Technological Educational Institute of Chalkida Greece Electronics Sensors and Communications Laboratory and the Aircraft Technology Department Technological Educational Institute of Chalkida Greece VE Lashkaryov Institute of Semiconductor Physics National Academy of Sciences of Ukraine Kiev Ukraine Research Institute of Electronics Shizuoka University Hamamatsu Shizuoka Japan Greek Atomic Energy Commission Attiki Greece

We have designed and constructed an 8 channel system for the analog processing, the digitization, the digital processing and acquisition of signals from CdTe / CdZnTe discrete detectors. The system consists of: Discrete charge preamplifiers, discrete semi-Gaussian shapers, 8 A/D converters working in parallel, FPGA for the pre-processing of the digital signals, high voltage module, USB link for the PC and software. The detectors can be packaged together with a JFET front end transistor and plugged in the mother board which contains the rest of the charge amplifiers, the shapers and single to differential signal converters. The system can be used for the characterization of the detectors or as a portable instrument for spectroscopy.

关键词： Data acquisition Sensor systems Detectors Signal design Signal processing Preamplifiers field programmable gate arrays Voltage Universal Serial Bus Packaging

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Power Efficient Real-Time Traffic Signal Classification for Autonomous Driving Using FPGAs

Power Efficient Real-Time Traffic Signal Classification for ...

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International conference on communications, Signal processing, and their Applications (ICCSPA)

作者： Rashed Al Amin Md Shahi Amran Hossain Leon Tjard Schmid Veit Wiese Roman Obermaisser Institute for Embedded Systems University of Siegen Siegen Germany

ISBN: (数字)9798350384819

ISBN: (纸本)9798350384826

The significant advancements in research within the domain of Advanced Driver-Assistance systems (ADAS) have been significantly propelled by the integration of Artificial Intelligence (AI) and Deep Learning (DL). The detection and classification of traffic signals are pivotal for ensuring driver safety and comfort, prompting the development of numerous detection and classification methodologies in recent times. Convolutional Neural Networks (CNNs) and field Programmable Gate Arrays (FPGAs) have individually demonstrated notable efficacy in signal processing, image detection, and image classification tasks. However, the amalgamation of CNNs and FPGAs for traffic signal classification offers enhanced flexibility, accuracy, and resource efficiency. This study proposes a software-hardware co-design approach for the development of a resource-efficient real-time traffic signal classification system tailored for FPGAs utilizing the CNN algorithm. The software implementation has been carried out within the TensorFlow framework, while the hardware implementation is executed via the Xilinx Vivado 2023.1 platform and rigorously evaluated using the Xilinx ZCU102 FPGA board. Experimental findings demonstrate that the traffic signal classification accuracy can attain approximately 99.98% at a frame rate of 84139 frames per second (FPS) on the FPGA platform, with a power consumption of 4.4W. The exceptionally low latency and heightened accuracy exhibited by the proposed system render it highly advantageous for ADAS and other safety-critical applications.

关键词： Accuracy Software algorithms Pattern classification Signal processing algorithms Real-time systems Software Safety Convolutional neural networks Artificial intelligence field programmable gate arrays

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S-band radar based on Lyrtech Software Defined Radio

S-band radar based on Lyrtech Software Defined Radio

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IEEE National conference on Aerospace and Electronics (NAECON)

作者： Siyang Cao Yuan F. Zheng Robert L. Ewing Department of Electrical and Computer Engineering The Ohio State University Columbus Ohio Sensors Directorate US Air Force Research Laboratory Wright-Patterson Air Force Base Ohio

The focus of this paper is on the development of Sband radar using the Lyrtech Small Form Factor (SFF) Software Defined Radio (SDR) for generating the Chirp-Z signal. The Lyrtech SDR platform has a high speed AD/DA conversion board and a tunable RF board, which enable a flexible radar design. To achieve a functional radar system, the development kids of the SFF SDR have to be fully utilized. This paper introduces the usage of both software and hardware resources of the SDR for converting the SDR into a waveform-programmable radar, which can benefit the study of radar systems using generic SDR platforms. Based on our approach, we develop an S-band radar which is used to transmit a Chirp-Z radar waveform modulated on a 2.2GHz carrier. The structure and the development kits of the SFF platform are introduced, and the development of the S-band radar by using the development kits discussed. Finally, both transmitted and received Chirp-Z signals using the developed radar system are demonstrated.

关键词： Radar Digital signal processing field programmable gate arrays Software Radio frequency Real-time systems Data conversion

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Near-field Measurement System for the Upper Mid-Band

Near-Field Measurement System for the Upper Mid-Band

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Asilomar conference on signals, systems & Computers

作者： Ali Rasteh Raghavendra Palayam Hari Hao Guo Marco Mezzavilla Sundeep Rangan Tandon School of Engineering New York University Brooklyn NY USA Department of Electrical Engineering Chalmers University of Technology Gothenburg Sweden Dipartimento di Elettronica Informazione e Bioingegneria (DEIB) Politecnico di Milano Milan Italy

ISBN: (数字)9798350354058

ISBN: (纸本)9798350354065

The upper mid-band (or FR3, spanning 6–24 GHz) is a crucial frequency range for next-generation mobile networks, offering a favorable balance between coverage and spectrum efficiency. From another perspective, the systems operating in the near-field in both indoor environment and outdoor environments can support line-of-sight multiple input multiple output (MIMO) communications and be beneficial from the FR3 bands. In this paper, a novel method is proposed to measure the near-field parameters leveraging a recently developed reflection model where the near-field paths can be described by their image points. We show that these image points can be accurately estimated via triangulation from multiple measurements with a small number of antennas in each measurement, thus affording a low-cost procedure for near-field multi-path parameter extraction. A preliminary experimental apparatus is presented comprising 2 transmit and 2 receive antennas mounted on a linear track to measure the 2 × 2 MIMO channel at various displacements. The system uses a recently-developed wideband radio frequency (RF) transceiver board with fast frequency switching, an FPGA for fast baseband processing, and a new parameter extraction method to recover paths and spherical characteristics from the multiple 2 × 2 measurements.

关键词： Antenna measurements Switches Apertures Reflection MIMO Transceivers Frequency measurement Velocity measurement Wideband Parameter extraction

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Improving Radio Tomographic Images using multipath signals

Improving Radio Tomographic Images using multipath signals

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IEEE International conference on Wireless Information Technology and systems (ICWITS)

作者： Brian Beck Robert Baxley Xiaoli Ma Information and Communications Laboratory Georgia Tech Research Institute Atlanta USA 30318

Radio Tomographic Imaging (RTI) seeks to reconstruct useful images of the environment through measurements of received signal strength (RSS) in a network of radios. RSS data is compiled over many transmissions, and after processing the data an estimated image of the spatial loss field (SLF) of the area can be recovered. This image represents the estimated radio frequency signal attenuation in dB that occurs at each pixel location. An ideal RTI system could form images of floor plans and objects that are located inside buildings or behind other obstructions [1]. One of the challenges in RTI is the presence of multipath signals. Such signals reach the receiver at some delay with respect to the line-of-sight (LOS) signal. Presently, there has been no attempt to deal with such signals other than to reject them, at best. Thus, potentially useful links in a network of radios cannot be utilized, because their LOS signal path does not pass through the area to be imaged. This paper presents a method by which multipath signals may be treated as useful measurements in an RTI system. Doing so informs the existing SLF image, improving image quality and reducing root-mean-squared-error (RMSE), which is the focus of this paper. It is also possible to use such measurements to create an estimate of the area's reflectivity loss field, or RLF. Such an estimated image represents the reflection coefficient (in dB) seen at each reflective pixel location. This image could be useful in identifying interior features that are reflective, such as large metal objects or metal walls. Thus, two separate images are estimated simultaneously, an SLF image of pixel attenuation, and an RLF image of pixel reflectivity values. Both estimated images remain linear functions of the received data. We refer to this new model as the Augmented Multipath Linear generating Model, or AMLGM. After presenting the AMLGM model, we discuss the results of our simulations showing improvements in both subjective and obj

关键词： Portable document format IEEE Xplore

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