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Showing papers on "Digital signal published in 2022"


Journal ArticleDOI
TL;DR: In this paper , the main methods of digital signal processing and synthesis of appropriate devices, primarily digital filters, are discussed, and the authors discuss the main advantages of these methods and their application in control and monitoring systems.
Abstract: Methods of digital signal processing in control and monitoring systems are relevant today and largely replace the classic analog methods. This article discusses the main methods of digital signal processing and synthesis of appropriate devices, primarily digital filters.

2 citations


Journal ArticleDOI
TL;DR: An optimal value design method is proposed to suppress the frequency-aliasing phenomenon by determining an appropriate voltage-balance frequency and a code restructuration method is implemented to adapt the voltage- balance strategy to the optimal frequency and to avoid extra switching actions at the same time.
Abstract: The frequency-aliasing phenomenon, which can distort high-frequency harmonics in the analog input signal into low-frequency harmonics in the output digital signal, is widespread in the process of analog to digital conversions. The sorting-algorithm-based voltage-balance strategy is also such a conversion process. This strategy converts the analog-continuous-sinusoidal fundamental wave into the digital-discrete inserted-submodule number, deciding how many submodules are required to operate in modular multilevel converters (MMC). Thus, the frequency-aliasing phenomenon can occur in this strategy and deteriorate the performance of MMC as well. This article first proposes the mechanism of the frequency-aliasing phenomenon in the sorting-algorithm-based voltage-balance strategy. A quantitative analysis is then presented to indicate the root cause of the frequency-aliasing phenomenon in the voltage-balance strategy. This analysis also intuitively describes the frequency-aliasing phenomenon's effect, such as harmonic redistributions in the large-signal model, the phase delay in the small-signal model, and the associated deteriorations including the system stability's decrease and the power quality's reduction. Based on the above analysis, an optimal value design method is proposed to suppress the frequency-aliasing phenomenon by determining an appropriate voltage-balance frequency. A code restructuration method is further implemented to adapt the voltage-balance strategy to the optimal frequency and to avoid extra switching actions at the same time. The deteriorations caused by the frequency-aliasing phenomenon and the effectiveness of proposed methods are finally demonstrated via simulations experiments.

2 citations


Journal ArticleDOI
TL;DR: In this article, the authors proposed a new digital signal processing technology based on distributed cloud computing in electronic information engineering, which can realize the adaptive regulation of data collection and storage in the process of DSP, and realize diversified analysis and intelligent matching.

1 citations


Proceedings ArticleDOI
25 Feb 2022
TL;DR: In this paper , the frequency output value of the measured signal is converted by the internal algorithm of the digital cymometer, and the final measurement result is converted into a decimal number and displayed on the display screen.
Abstract: The frequency meter is widely used in the electronic equipment measured with respect to. As researchers continue to improve and upgrade frequency counters, the commonly used digital frequency counters now generally use digital circuits to measure the frequency of periodic signals. The frequency output value of the measured signal is converted by the internal algorithm of the digital cymometer, and the final measurement result will be converted into a decimal number and displayed on the display screen, which can make the measurement result more intuitive and improve the frequency measurement efficiency. In this design, the frequency of the measured signal is collected by the STC89C52 single-chip microcomputer. After the signal is collected, the internal of the single-chip microcomputer will analyze and convert the collected signal, and the final analysis and conversion result will be displayed on the LCD 1602 LCD screen.

Proceedings ArticleDOI
01 Feb 2022
TL;DR: In this paper , the authors introduced the unqualified classification, insulation process, copper shielding process and single disk test of railway internal shielded digital signal cable, which provided a guarantee for the safe operation of high-speed railway.
Abstract: Railway internal shielded digital signal cable is mainly used in railway ZPW-2000A system., the cable has good shielding performance., can realize the transmission of electrical signal and recovery signal in the same cable at the same time., which can greatly save the project cost. At present., China's high-speed railway mainly uses railway internal shielded digital signal cable., so the quality control requirements of railway internal shielded digital signal cable are becoming stricter. This paper introduces the unqualified classification., insulation process., copper shielding process and single disk test of railway internal shielded digital signal cable., which provides a guarantee for the safe operation of high-speed railway.

Proceedings ArticleDOI
06 Sep 2022
TL;DR: The purpose of this project is to use MATLAB programming to construct a digital communication system, demonstrates the results of its operation and analysis eleven different factors may affect the communication of the system.
Abstract: Digital communication is a kind of method that carrier is applied to digital signal for transmitting message, or uses digital signal to carry on digital modulation to the carrier and transmits the communication mode. Digital signals such as telegraph, digital data, and analog signals such as voice and image that have been digitally processed can be transmitted. Besides, since the rapid development of modern technology such as computer technology, digital storage technology, digital switching technology and digital processing technology, many signals at equipment and terminal interface are digital signals, hence it is convenient to connect it with the digital communication system. Anyway, the purpose of this project is to use MATLAB programming to construct a digital communication system, demonstrates the results of its operation and analysis eleven different factors may affect the communication of the system. All the functions of different sections are separated and named in their own file with its annotation. The comparisons of results that are influenced by different factors are well explained through figures or tables. All the efforts are targeted to minimize the error between input file and output file to build a qualified digital communication system and prove more useful data for the reference of this field.

Book ChapterDOI
01 Jan 2022
TL;DR: In this paper , the details of digital representations of discrete-time signals are presented bridging the gap from the abstract discrete time signal notation presented in the book, x[n], and its representation in a digital processor, and more specifically a digital signal processor.
Abstract: AbstractThe details of digital representations of discrete-time signals are presented in this chapter bridging the gap from the abstract discrete-time signal notation presented in the book, x[n], and its representation in a digital processor, and more specifically a digital signal processor.

Proceedings ArticleDOI
09 Mar 2022
TL;DR: In this paper , an adaptive digital signal processing scheme applied for a digital communication has been presented in the press, where the model of an ANC is utilized to demodulate in a coherent detection scheme for a received QPSK signal.
Abstract: An adaptive digital signal processing scheme applied for a digital communication has been presented in the press. The model of an ANC is utilized to demodulate in a coherent detection scheme for a received QPSK signal. The coefficients of the system will be updated by the least mean square (LMS) algorithm that is controlled in the adaptation sequence according to the symbol duration of the received signal. Since such a manner is performed, the system is similar to integrate and dump (I&D) correlator in behavior. The analysis and simulation results have implied that the desired information signal can be recovered from the received signal by the proposed scheme with the same performance as the conventional optimum demodulation.

Proceedings ArticleDOI
09 Oct 2022
TL;DR: In this paper , the authors designed a digital block over a 77 GHz RF channel and used different package models to evaluate the digital coupling between the digital and RF blocks and the effect on their signal integrity.
Abstract: Integration of high-speed digital electronics and high-frequency radar channels in a package with limited layers can result in compromised return paths and degraded signal integrity. In this paper, we designed a digital block over a 77 GHz RF channel and used different package models to evaluate the digital coupling between the digital and RF blocks and the effect on their signal integrity.

Proceedings ArticleDOI
12 Sep 2022
TL;DR: In this article , the authors presented a signal generator using Direct Digital Synthesis (DDS) principles and output signals from 10 Hz to 400 MHz, which can be either simple harmonics or more complex modulated signals with different parameter settings.
Abstract: The signal generator was created as part of a research project and thesis. In this case, the aim was to construct a functional device capable of generating electrical signals with different parameters. The result is a microcontroller controlled chip using Direct Digital Synthesis (DDS) principles and output signals from 10 Hz to 400 MHz. The signals generated can be either simple harmonics or more complex modulated signals with different parameter settings. The device has been prepared so that it can be assembled and used by anyone interested in such a device according to the instructions and using the developed control software.

Proceedings ArticleDOI
04 Sep 2022
TL;DR: In this article , the authors presented the stages of constructing a highly informative digital image of the time-frequency representation of information signals of cyber-physical systems, which includes the stage of displaying the signal on the frequency-time plane, the two-dimensional digital filtering and the stage extracting highly informative components of the signal image.
Abstract: The paper presents the stages of constructing a highly informative digital image of the time-frequency representation of information signals of cyber-physical systems. Signal visualization includes the stage of displaying the signal on the frequency-time plane, the stage of two-dimensional digital filtering and the stage of extracting highly informative components of the signal image. The use of two-dimensional digital filtering allows you to select the most informative component of the image of a complex analyzed information signal. The obtained digital image of the signal of the cyber-physical system is a highly informative initial information for solving a wide range of different problems of information security systems in cyber-physical systems with the subsequent use of machine learning technologies.

Proceedings ArticleDOI
30 May 2022
TL;DR: In this article , the question of noise suppression by statistical analysis of Analog-to-Digital Converter (ADC) data vs. Time-To-Digital converter (TDC) sampled data is raised.
Abstract: In this work we raise the question of noise suppression by statistical analysis of Analog-to-digital converter (ADC) data vs. Time-to-digital converter (TDC) sampled data. The current technology options are identified. We analyze realistic scenarios through computer simulation and conclude that TDC has the same statistical potential as ADC, but current devices offer insufficient memory depth for long range, low signal to noise ratio laser range-finders’ applications.

Proceedings ArticleDOI
01 Jan 2022
TL;DR: In this paper , the authors focus on the research of FPGA-based multi-rate digital signal processing software and analyze the current situation of multiuser signal processing, and then learn about FPGAs-based multiple-rate signal processing.
Abstract: Multi-rate digital signal acquisition and processing technology is a general term that refers to changing the sampling rate of the signal through extraction or interpolation. In the acquisition and processing of a variety of digital signals such as our country’s petroleum resources survey, in order to meet the differences of various modules the sampling rate is required, and the multi-speed digital signal acquisition and processing technology has also received great attention. This article focuses on the research of FPGA-based multi-rate digital signal processing software. After analyzing the current situation of multi-rate digital signal processing, we will understand the application of FPGA in multi-rate digital signal processing, and then learn about FPGA-based multi-rate digital signal processing. The software is designed, and the designed software is tested, and the test is performed for the stability of the software. The test result is that the temperature of the software starts to stabilize after 1-2 hours of work, and then the test is performed for the software signal acquisition. The test result is the signal-to-noise ratio of the designed analog-to-digital conversion circuit can reach 85dB, and the effective number of bits can reach 13bit.

Journal ArticleDOI
TL;DR: In this article , the authors describe how a DSP (Digital Signal Processor) is created, as well as how its architecture functions in the context of digital audio applications, and the proposed digital signal processor (DSP) has six stages of pipeline with a fixed 24-bit data format, and each stage has 125 instructions.
Abstract: Digital audio signal processing has become increasingly common in multimedia systems as a result of the development of general-purpose digital signal processors (DSP processors) and high-precision oversampling analog-to-digital (A/D) converters. Nevertheless, the solution based on standard DSP chips could be too expensive and power-hungry for portable and home entertainment audio systems. As a result, it is necessary to locate an alternative solution that is both low-cost and low-power. In the context of digital audio applications, this paper will describe how a DSP (Digital Signal Processor) is created, as well as how its architecture functions. The proposed digital signal processor (DSP) has six stages of pipeline with a fixed 24-bit data format, and each stage has 125 instructions. The instructions for the audio signal processing are provided in a very specific manner. Each and every command is handled within the confines of a single cycle.

Book ChapterDOI
29 Nov 2022

Proceedings ArticleDOI
07 Oct 2022
TL;DR: The digital filter technology in digital signal processing is described in detail, the model of digital signal in gas detection principle is simply abstracted, and the main application of digital Signal Processing Technology in Gas detection is described at last.
Abstract: In today's information age, digital signal processing technology with a new form of technology has been applied to various fields of society, and with its own significant advantages, in each field has played a powerful role. In order to ensure the air quality of living and working environment, the primary task is to analyze the main pollutants in the air. In addition to traditional chemical monitoring methods, digital signal processing methods are more common to detect pollutants, but filtering technology is needed to overcome the noise interference in the detection process. In this paper, the digital filter technology in digital signal processing is described in detail, and the model of digital signal in gas detection principle is simply abstracted, and the main application of digital signal processing technology in gas detection is described at last. At the same time, the paper analyzes the application of digital signal processing technology in gas detection, hoping to provide some help to the application of this technology and the good detection and treatment of gas pollution. Finally, a signal processing device for differential gas detection and its gas detection system are introduced.

Journal ArticleDOI
TL;DR: The developed electronic weighing device was designed using the NodeMCU ESP 8266 microcontroller as a controller and a load cell as a sensor to read the measure in conventional analog form to digital form, achieving high precision in measurement and calibration.
Abstract: The weight measurement system is carried out manually using a manual scale. The existing weighing system is still considered inefficient because it takes a long time if it is done repeatedly and there are too many errors in its measurement. To overcome this, an electronic weighing device was designed using the NodeMCU ESP 8266 microcontroller as a controller and a load cell as a sensor. This journal presents the development of electronic weighing indicators for digital measurements. The purpose of this system is to read the measured weight in conventional analog form to digital form, achieving high precision in measurement and calibration. The components used in this research are Load Cell, Load Cell Hx711 amplifier, NodeMCU ESP 8266 microcontroller, and LCD module. In this study, a 4 kg load cell was used. The load cell sends the output signal of the measured mechanical weight to the Hx711 module which amplifies and sends the output to the NodeMCU microcontroller. The microcontroller calibrates the output signal with the help of the load cell amplifier module before sending the converted signal to digital form to the LCD module for display. The developed system has proven that digital electronic weighing systems can be low cost, miniature, discrete, and can take accurate readings without errors

Proceedings ArticleDOI
21 Apr 2022
TL;DR: The experiment shows that compared with the traditional methods, this recognition method has more advantages in the overall modulation recognition accuracy when the signal-to-noise ratio is rising.
Abstract: Modulation recognition is a key technology in the field of communication, especially in the field of non cooperative communication. It can realize the automatic recognition and classification of unknown signal modulation without prior knowledge. With the rapid development of modern communication technology, modulation methods become complex and diverse, and modulation recognition technology is also facing more challenges. Although there are relevant studies, there are still many problems and research work to be solved and improved. Based on this, a modulation recognition method of wireless communication digital signal considering multi-dimensional characteristics is proposed. By extracting multidimensional characteristic parameters, constructing multi-dimensional characteristic signal modulation decision tree model and wireless communication digital signal modulation recognition algorithm based on multi-dimensional characteristic model, the modulation mode recognition of digital signal is realized. The experiment shows that compared with the traditional methods, this recognition method has more advantages in the overall modulation recognition accuracy when the signal-to-noise ratio is rising.

Proceedings ArticleDOI
16 Dec 2022
TL;DR: In this paper , the authors introduce five key links in the signal analysis and processing of HF digital communication waveform, including signal preprocessing, signal parameter analysis, signal blind demodulation, signal protocol analysis, and signal synchronous demodulations.
Abstract: This paper introduces five key links in the signal analysis and processing of HF digital communication waveform, including signal preprocessing, signal parameter analysis, signal blind demodulation, signal protocol analysis, signal synchronous demodulation, and analyzes and applies them in combination with specific HF digital communication waveform signals.

Journal ArticleDOI
TL;DR: This paper aims at elaborating on the digital signal processing techniques used in data manipulation in the radioSolariz solar radio-telescope project through the use of streaming single instruction – multiple data extensions, which offers increased computational power by realizing parallel processing.
Abstract: This paper aims at elaborating on the digital signal processing techniques used in data manipulation in the radioSolariz solar radio-telescope project. Focus is drawn on the implementation of different digital signal processing algorithms through the use of streaming single instruction – multiple data extensions 2. This complementary instruction set to general purpose personal computer microprocessors offers increased computational power by realizing parallel processing. The benefit is a higher data throughput while lowering the electrical power consumption of the digital signal processing computer. Optimized code fragments are shown along with original code snippets and these are discussed and analyzed. Future work and implementation of other modern parallel processing technologies are envisaged.


Journal ArticleDOI
23 Aug 2022
TL;DR: A type of signal transmission known as "digital transmission" involves the discrete time variation of two values, one of which represents the binary number "0" and the other "1."
Abstract: A type of signal transmission known as "digital transmission" involves the discrete time variation of two values, one of which represents the binary number "0" and the other "1." Voltage or electrical potential is often the variable amount in copper cabling. Fiber-optic wiring or wireless communication use variations in intensity or any other physical quantity. Digital signals use discrete values to transmit binary data through a communication path like a network cable or a telecommunications link. On a serial transmission line, a digital signal is transmitted one bit at a time. Analog and digital methods can both be used to store data or information. On a serial transmission line, a digital signal is transmitted one bit at a time. Analog and digital methods can both be used to store data or information.

Journal ArticleDOI
TL;DR: In this paper , the authors proposed a method to improve the quality of the information provided by the user by using the information of the user's interaction with the service provider of the service.
Abstract: Рассматривается цифровой измеритель действующего значения сигналов произвольной формы. Вычислительный алгоритм реализует прямое определение искомой величины без необходимости пересчета показаний в зависимости от формы сигнала, не требует синхронизации с обрабатываемым сигналом и обеспечивает формирование итогового результата после поступления каждого очередного символа при минимуме простых арифметических операций и высокой точности измерений. Проведен анализ характеристик измерителя, рассмотрено влияние на точность асинхронности выборки отсчетов сигнала с его периодичностью. Сформулированы требования к разрядности аналого-цифрового преобразователя и объема выборки отсчетов измеряемого сигнала. Проведено статистическое имитационное моделирование цифрового измерителя, получены оценки погрешности результата. Реализованы макеты высокоточного источника переменного напряжения на основе цифро-аналогового преобразователя (ЦАП) и измерителя действующего значения напряжения на базе программируемой логической интегральной схемы (ПЛИС), проведена оценка необходимых аппаратных ресурсов. Получены результаты измерения постоянных и переменных (гармонического и пилообразного) напряжений, формируемых на основе прецизионных источников опорного напряжения. Измеритель может быть использован при проектировании цифровых вольтметров и амперметров переменного тока, показания которых не зависят от формы сигнала, допускает простую аппаратную реализацию и обеспечивает возможность измерения как низкочастотных, так и высокочастотных переменных сигналов A digital meter of the effective value of arbitrary waveform signals is considered. The computational algorithm implements a direct determination of the desired value without the need to recalculate readings depending on the signal shape, does not require synchronization with the processed signal, and provides the formation of the final result after the arrival of each next symbol with a minimum of simple arithmetic operations and high measurement accuracy. The analysis of the characteristics of the meter is carried out, the influence on the accuracy of the asynchrony of the sample of signal samples with its periodicity is considered. The requirements for the bit capacity of the analog-to-digital converter and the sample size of the samples of the measured signal are formulated. Statistical simulation of a digital meter has been carried out, estimates of the error of the result have been obtained. Models of a high-precision AC voltage source based on a digital-to-analog converter (DAC) and an effective voltage value meter based on a field-programmable logic integrated circuit (FPGA) have been implemented, and an assessment of the necessary hardware resources has been carried out. The results of measurements of constant and variable (harmonic and sawtooth) voltages formed on the basis of precision reference voltage sources are obtained. The meter can be used in the design of digital AC voltmeters and ammeters, the readings of which do not depend on the waveform, allow for a simple hardware implementation and provide the ability to measure both low-frequency and high-frequency alternating signals

Proceedings ArticleDOI
08 Jul 2022
TL;DR: In this article , the design method of the digital signal generator based on LPC2132 as the main control chip was introduced, using the direct digital frequency synthesis (DDS) chip and programmable logic device (CPLD).
Abstract: This paper introduces the design method of the digital signal generator based on LPC2132 as the main control chip. Using the direct digital frequency synthesis (DDS) chip and programmable logic device (CPLD), the analog signal amplification and gain control circuit is designed. Different signals can be conveniently switched through the keyboard, realizing a new digital signal source with stable waveform, high precision and adjustable amplitude and frequency within the specified range.

Journal ArticleDOI
TL;DR: In this article , the authors designed a DCC quality tester, which counts the valid DCC packets per second collected from the tracks of a digital railway system and shows if the tested model train receives the DCC signal within an acceptable error rate that its decoder can handle properly.
Abstract: DCC (Digital Command and Control) is an operation standard for digital model train networks. By means of the DCC signal, broadcasted throughout the entire digital railway system, every item performs like its real-life counterpart. Despite the hardware and software safety measures, the extent and shape of large railway systems and the contacts between the rails, wheels and pickup collectors of model trains can impede the reception of the DCC signal, which may lead to the malfunction of their digital decoders. Thus, it is important to assess the quality of the DCC signal that reaches the digital decoders of model trains. The authors designed a DCC quality tester, which counts the valid DCC packets per second collected from the tracks of a digital railway system. It is built around a custom-programmed microcontroller and shows if the tested model train receives the DCC signal within an acceptable error rate that its decoder can handle properly. A high error rate warns that the model train and/or the tracks have problems. Thus, this digital DCC tester certifies the adequate operation of the tested digital model train, proving itself to be a useful quality-testing tool for model railroaders.