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Articles de revues sur le sujet « Digital modulation »

Auteur : Grafiati

Publié le 4 juin 2021

Mis à jour le 25 juillet 2025

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1

Zhang, Hao Chi, Tie Jun Cui, Yu Luo, et al. "Active digital spoof plasmonics." National Science Review 7, no. 2 (2019): 261–69. http://dx.doi.org/10.1093/nsr/nwz148.

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Abstract Digital coding and digital modulation are the foundation of modern information science. The combination of digital technology with metamaterials provides a powerful scheme for spatial and temporal controls of electromagnetic waves. Such a technique, however, has thus far been limited to the control of free-space light. Its application to plasmonics to shape subwavelength fields still remains elusive. Here, we report the design and experimental realization of a tunable conformal plasmonic metasurface, which is capable of digitally coding and modulating designer surface plasmons at the

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Mankovskyy, Spartаk, Myron Nykolyshyn, and Emiliya Mankovska. "Digital method of SSB modulation." Computational Problems of Electrical Engineering 7, no. 2 (2017): 92–96. https://doi.org/10.23939/jcpee2017.02.092.

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This paper is dedicated to modeling of the digital method of single-sideband (SSB) modulation. Digital method of SSB modulation provided in this paper is based on Weaver`s method of SSB modulation. The design and calculations of digital blocks are detailed. Such a model allows obtaining the output SSB signal in time and frequency domains at given input signals and system parameters. This could be useful for design and optimization purposes. In the case of implementation of SSB modulation with the use of analog circuits, it requires mixers, filters constructed with the use of inductors, capacit

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Pamungkas, Wahyu, Anggun Fitrian Isnawati, and Adi Kurniawan. "Modulasi Digital Menggunakan Matlab." JURNAL INFOTEL - Informatika Telekomunikasi Elektronika 4, no. 2 (2012): 1. http://dx.doi.org/10.20895/infotel.v4i2.102.

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In telecommunication systems, the determination of the modulation system is an important method in the process of sending information from transmitter to receiver. In the simulation that is done using QPSK modulation system (Quadrature Phase Shift Keying), 8-QAM (Quadrature Amplitude Modulation), 16-QAM (16-Quadrature Amplitude Modulation) that uses AWGN (Additive White Gaussian Noise) channel in the transmission system uses MATLAB software. The execution of the simulation is aimed to describe how the characteristics of the waveform of each block of the modulator, to add noise in the AWGN chan

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Rong, Li. "Automatic Recognition of M-Nary Digital Modulation Signals." Applied Mechanics and Materials 336-338 (July 2013): 1665–69. http://dx.doi.org/10.4028/www.scientific.net/amm.336-338.1665.

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For the using of multi-modulation, the precondition of receiving and demodulating signal is to decide the type of the modulation. So automatic recognition of modulation signal has significant influences on the analysis of communication signals. In this paper, nine types of M-nary digital modulations are recognized by using four effective key features and utilizing the decision-theoretic approachThe simulation results shows that overall success rate is over 99% at SNR4dBThis algorithm is verified its good performance. It has simple structure, less calculation and good performance of real time.

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Md., Juwel Sheikh. "VIDEO TRANSMISSION IN V-BLAST ENCODED MIMO MC-CDMA WIRELESS SYSTEM: PERFORMANCE STUDY." International Journal of Ambient Systems and applications(IJASA) 8, no. 1/2 (2023): 19. https://doi.org/10.5281/zenodo.8139137.

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In this paper, the bit error rate (BER) performance study on video transmission in a V-BLAST encoded 2×2 MIMO MC-CDMA wireless communication system has been made. The system deploys two channel encoding schemes (1/2-rated Convolution and CRC) under four digital modulations (BPSK, DPSK, QPSK and QAM) and zero forcing (ZF) channel detection method. It is apparent that the BPSK modulation outperforms as compared to DPSK, QPSK and QAM modulation schemes in V-BLAST based MIMO MCCDMA communication system under AWGN channel. The 16QAM digital modulation shows worst performance in video transmis

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Mohammed, Raya Kahtan, and Hamsa Abdulkareem Abdullah. "Implementation of digital and analog modulation systems using FPGA." Indonesian Journal of Electrical Engineering and Computer Science 18, no. 1 (2020): 485. http://dx.doi.org/10.11591/ijeecs.v18.i1.pp485-493.

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<p><span>FPGA (Field Programmable Gate Array) based implementations of digital and analog modulation techniques play a vital rule in the design of signal processing system. The performance and flexibility provided by reconfigurable computing speeds up the development process in signal processing implementations using FPGA. Different methods for digital and analog modulation are designed in this paper by usinSg System Generator tools &amp; Vivado. Then all designed systems are implemented successfully in an FPGA hardware via the NEXYS 4 DDR with ARTIX 7 XC7A100T. A comparison be

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Raya., K. Mohammed, and A. Abdullah Hamsa. "Implementation of digital and analog modulation systems using FPGA." Indonesian Journal of Electrical Engineering and Computer Science (IJEECS) 18, no. 1 (2020): 485–93. https://doi.org/10.11591/ijeecs.v18.i1.pp485-493.

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FPGA (Field Programmable Gate Array) based implementations of digital and analog modulation techniques play a vital rule in the design of signal processing system. The performance and flexibility provided by reconfigurable computing speeds up the development process in signal processing implementations using FPGA. Different methods for digital and analog modulation are designed in this paper by usinSg System Generator tools & Vivado. Then all designed systems are implemented successfully in an FPGA hardware via the NEXYS 4 DDR with ARTIX 7 XC7A100T. A comparison between five types of digit

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Muñoz-Ramírez, Mauricio, Hugo Valderrama-Blavi, Marco Rivera, and Carlos Restrepo. "An Approach to Natural Sampling Using a Digital Sampling Technique for SPWM Multilevel Inverter Modulation." Energies 12, no. 15 (2019): 2925. http://dx.doi.org/10.3390/en12152925.

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This paper introduces an approach that applies a digital sampling technique for a sinusoidal pulse width modulation (SPWM) multilevel inverter modulation that reduces the total harmonic contents in the output voltage compared to that of classical regular sampling techniques. This new modulation emulates with a high degree of fidelity a natural sampling pulse width modulation (PWM). The theoretical analysis of this new digital technique compared with natural sampling has been validated by simulations and through experiments with a built prototype that performed five–level inverter modulations w

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Volkov, A. A., V. A. Kuzyukov, and M. S. Morozov. "MODEM OPTIONS FOR DIGITAL RADIO COMMUNICATION SYSTEMS." World of Transport and Transportation 15, no. 6 (2017): 48–56. http://dx.doi.org/10.30932/1992-3252-2017-15-6-4.

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[For the English abstract and full text of the article please see the attached PDF-File (English version follows Russian version)].ABSTRACT New versions of the modulator and demodulator (modem) for the digital railway radio communication system GSM-R have been developed, which increase the noise immunity twofold. To realize «cos» and «sin» blocks, a phase modulator is used, two coherent quadrature demodulators are connected to its output in parallel. It is shown that «cos» block generates the signal cos [msinφ(t)], which is transferred to the operating frequency of the transmitter by means of

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Luţă, Alexandru-Daniel, and Paul Bechet. "An Algorithm for Automatic Recogniton of Digital QAM Modulations." International conference KNOWLEDGE-BASED ORGANIZATION 25, no. 3 (2019): 36–41. http://dx.doi.org/10.2478/kbo-2019-0114.

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Abstract This paper proposes a new Matlab-developed algorithm for automatic recognition of digital modulations using the constellation of states. Using this technique the automatic distinction between four digital modulation schemes (8-QAM, 16-QAM, 32-QAM and 64-QAM) was made. It has been seen that the efficiency of the algorithm is influenced by the type of modulation, the value of the signal-to-noise ratio and the number of samples. In the case of an AWGN noise channel the simulation results indicated that the value of SNR (signal-to-noise ratio) has a small influence on the recognition rate

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Awan, Waseem. "Digital Modulator using Digitally Programmable Complementary metal–oxide–semiconductor Differential Voltage Current Conveyor." Academic Journal of Research and Scientific Publishing 6, no. 65 (2024): 21–40. http://dx.doi.org/10.52132/ajrsp.e.2024.65.2.

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This study aims to Developing a digital modulation system using a new technology and idea, which is the digitally programmable CMOS (Complementary metal–oxide–semiconductor), Integrate the CMOS DVCC circuit as a modulator in the communication systems, as will be explained in chapter 3, Finally, simulate this new idea in communication by using a simulation program, which is PSpice software, and analyzing the results. By focusing on How to use digital programmable CMOS (Complementary Metal–Oxide–Semiconductor) in a communication system as a digital modulator, Verifying the effectiveness of the s

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Prakasam, P., and M. Madheswaran. "Digital Modulation Identification Model Using Wavelet Transform and Statistical Parameters." Journal of Computer Systems, Networks, and Communications 2008 (2008): 1–8. http://dx.doi.org/10.1155/2008/175236.

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A generalized modulation identification scheme is developed and presented. With the help of this scheme, the automatic modulation classification and recognition of wireless communication signals with a priori unknown parameters are possible effectively. The special features of the procedure are the possibility to adapt it dynamically to nearly all modulation types, and the capability to identify. The developed scheme based on wavelet transform and statistical parameters has been used to identify M-ary PSK, M-ary QAM, GMSK, and M-ary FSK modulations. The simulated results show that the correct

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Shetty, Mamtha. "Design of BPSK Modulator Using VHDL." INTERNATIONAL JOURNAL OF COMPUTERS & TECHNOLOGY 13, no. 12 (2014): 5247–52. http://dx.doi.org/10.24297/ijct.v13i12.5276.

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Binary Phase Shift Keying represents the simulation results of binary digital modulation schemes. Here for BASK and BPSK modulation techniques use FPGA algorithm. If multiplier block is used for multiplication bit stream with carrier signal, used time will rises. In addition using multiplier block obtained simulation results were analyzed and compared to other simulation results. Source consumptions of FPGA-based BASK modulation technique and BPSK modulation technique were compared. Also, for different modulation algorithm, source consumptions of BASK and BPSK modulation technique were analyze

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Joo, Kyung-II, Sungjin Lim, Ki-Dong Lim, et al. "P‐89: Digital Holography Microscope with liquid crystal phase modulator." SID Symposium Digest of Technical Papers 54, no. 1 (2023): 1388–90. http://dx.doi.org/10.1002/sdtp.16843.

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We proposed a DHM system with improved resolution property by using liquid crystal (LC) phase modulator. The LC phase modulator can stably control the phase modulation characteristics of the interference pattern and implements the four‐step phase shifting scheme. The proposed DHM system showed a four‐fold improvement in resolution compared to the conventional DHM with polarized camera. Finally, it was confirmed that the modulation transfer function (MTF) value was improved 2 times at the resolution target of 105 lines/mm.

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Ahmed, Md Firoz, Md Tahidul Islam, and Abu Zafor Md. Touhidul Islam. "Performance of Convolution and CRC Channel Encoded V-Blast 4x4 MIMO MC-CDMA Wireless Communication System." International Journal of Ambient Systems and Applications 9, no. 2 (2021): 1–6. http://dx.doi.org/10.5121/ijasa.2021.9201.

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Wireless communications are among the rapidly growing fields in our current life and have a massive effect on every aspect of our everyday life. In this paper, the performance of the various digital modulation techniques (BPSK, DPSK, QPSK, and QAM) based wireless communication system on the audio signal transmission through the additive Gaussian Noise (AWGN) channel is assessed on the basis of bit error rate (BER) as a function of the signal-to-noise ratio (SNR). Based on the results of this study, BPSK modulation outperforms the DPSK, QPSK, and QAM modulation strategies in the MIMO MC-CDMA VB

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Md., Firoz Ahmed1. "PERFORMANCE OF CONVOLUTION AND CRC CHANNEL ENCODED V-BLAST 4×4 MIMO MCCDMA WIRELESS COMMUNICATION SYSTEM." International Journal of Ambient Systems and applications(IJASA) 09, no. 1/2 (2023): 6. https://doi.org/10.5281/zenodo.7802232.

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Wireless communications are among the rapidly growing fields in our current life and have a massive effect on every aspect of our everyday life. In this paper, the performance of the various digital modulation techniques (BPSK, DPSK, QPSK, and QAM) based wireless communication system on the audio signal transmission through the additive Gaussian Noise (AWGN) channel is assessed on the basis of bit error rate (BER) as a function of the signal-to-noise ratio (SNR). Based on the results of this study, BPSK modulation outperforms the DPSK, QPSK, and QAM modulation strategies in the MIMO MC-CDMA VB

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Kudinova, T. V., G. A. Osipov, and F. A. Nanay. "Digital demodulators for analog signals: comparative analysis and simulation." Journal of Physics: Conference Series 2094, no. 2 (2021): 022048. http://dx.doi.org/10.1088/1742-6596/2094/2/022048.

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Abstract The paper examines digital demodulators for two commonly used techniques of modulating analog signals: amplitude modulation (AM) and frequency modulation (FM). The described demodulators can be used to perform the radio monitoring of narrowband signal ranges including FM broadcasting stations as well as license-free CB, LPD, PMR bands. The demodulators considered in this work are intended for programmable devices with limited memory and computing resources, for example, for STM32F407 microcontrollers and similar ones. The paper presents the analysis and simulation of demodulators for

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Wang, Xiang Zhong, Jun Jie Zhu, Xu Feng, and Cheng Chen. "High Accuracy Multi-Channel SPWM Generator Based on Digital Natural Sampling." Advanced Materials Research 433-440 (January 2012): 7430–35. http://dx.doi.org/10.4028/www.scientific.net/amr.433-440.7430.

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Principle of triangle carrier amplitude modulation is equivalent with sinusoidal modulator amplitude modulation, and principle of sinusoidal modulator phase-shifting is equivalent with the triangle carrier phase-shifting are proposed. A digital natural sampling based on multi-channel SPWM generator is developed using time-division multiplexed access (TDMA). Flip time computation by CPU is no needed in the generator which has an accuracy flip time. Design principle and implementation based on FPGA are introduced, and testing results are presented.

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Sundareshan, B. "Digital Modulation—Baseband Techniques." IETE Journal of Education 33, no. 1 (1992): 35–44. http://dx.doi.org/10.1080/09747338.1992.11436355.

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Bhatnagar, R. C., and B. Sundareshan. "Digital Modulation—Bandpass Techniques." IETE Journal of Education 33, no. 1 (1992): 45–56. http://dx.doi.org/10.1080/09747338.1992.11436356.

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Rogers, Steve. "Digital modulation and coding." Control Engineering Practice 5, no. 4 (1997): 585. http://dx.doi.org/10.1016/s0967-0661(97)83768-9.

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Muhammad, A. B., Denny Darlis, and Arfianto Fahmi. "Design and Realization of Digital Modulator BPSK, QPSK and 16-QAM on FPGA." Journal of Measurements, Electronics, Communications, and Systems 2, no. 1 (2016): 1. http://dx.doi.org/10.25124/jmecs.v2i1.1482.

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Innovations in the field of wireless communication are growing very rapidly in line with the behavior of modern societies that have high mobility, need of the flexible services, easy access, and high speed data transfer to facilitate any activities of its users. The needs of every user of any variety are more than just voice, video, data transfer, up to a demanding streaming multimedia capabilities and reliability of the communication system used. One of the factors that affect the quality and speed of data transfer in wireless communications is modulation. The development of technological mod

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Kushnirenko, N. I., and V. Ya Chechelnytskyi. "Digital modulation method based on perfect binary arrays." Odes’kyi Politechnichnyi Universytet. Pratsi, no. 1 (June 10, 2014): 218–24. http://dx.doi.org/10.15276/opu.1.43.2014.37.

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Horbatyi, I. V., U. S. Carp, and I. R. Tsymbaliuk. "Modulator for implementation of amplitude modulation of many components." Технология и конструирование в электронной аппаратуре, no. 3-4 (2021): 30–35. http://dx.doi.org/10.15222/tkea2021.3-4.30.

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The authors consider various anti-noise techniques in systems using digital signals, in particular QAM (quadrature amplitude modulation) signals. To increase the noise immunity of a system, it is proposed to use amplitude modulation of many components (AMMС). The advantages of this approach are demonstrated. The principles of AMMС signal formation are explained. The frequency efficiency, energy efficiency, and information efficiency of such signals are theoretically calculated. Different types of digital modulation are compared, the data being presented as a table, and a conclusion is made abo

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Zhu, Hong Li, та Xia Sun. "Design and Realization of π／4-DQPSK Modulation Circuit Based on FPGA". Advanced Materials Research 490-495 (березень 2012): 402–6. http://dx.doi.org/10.4028/www.scientific.net/amr.490-495.402.

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Technology of digital modulation plays an important role in digital communication system, the combination of digital communication technology and FPGA is a certain trend. This paper designs and realizes a new π／4-DQPSK modulator based on FPGA. The simulation result provides the correction of the design. With simple solution, high integration and high reliability, this π／4-DQPSK modulator can be widely used in digital communication field.

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Ireeta, Winston Tumps, Esther Nabadda, and George Isoe. "Digital high-speed data modulation techniques." Engineering and Applied Science Letters 4, no. 4 (2021): 1–4. http://dx.doi.org/10.30538/psrp-easl2021.0075.

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Most radio stations use frequency modulation (FM) to broadcast yet amplitude modulation (AM) ensures long distance modulation. The limitations of FM reception are the line of sight and the area of reception. These two parameters are much smaller in FM compared to AM which makes AM modulation have an added advantage over FM modulation. The results presented in this paper include; direct modulation at different bias currents and different transmission fiber lengths and the amplitude modulation using the Mach-Zehnder. The results show the possibility to transmit huge data at high speeds to over 1

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Jader, Rasool F., Mudhafar Haji M. Abd, and Ihsan Hamza Jumaa. "Signal Modulation Recognition System Based on Different Signal Noise Rate Using Artificial Intelligent Approach." Journal of Studies in Science and Engineering 2, no. 4 (2022): 37–49. http://dx.doi.org/10.53898/josse2022244.

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Everyone has paid much attention to modulation-type recognition in the past few years. There are many ways to find the modulation type, but only a few good ways to deal with signals with a lot of noise. This study comes up with a way to test how well different machine learning algorithms can handle noise when detecting digital and analogue modulations. This study looks at the four most common digital and analogue modulations: Phase Shift Keying, Quadrature Phase Shift Keying, Amplitude Modulation, and Morse Code. A signal noise rate from -10dB to +25dB is used to find these modulations. We use

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Liu, Xiaoli, Pau Closas, M. Liang, Y. Morton, T. Zhang, and Z. Hong. "Performance evaluation of MSK and OFDM modulations for future GNSS signals." GPS Solutions 18, no. 2 (2014): 163–75. https://doi.org/10.1007/s10291-014-0368-6.

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The objective of this work is to investigate the performances of orthogonal frequency division multiplexing (OFDM) and minimum frequency shift keying (MSK) modulations as potential future global navigation satellite systems (GNSS) signal modulation schemes. MSK is used in global system for mobile communications because of its spectral efficiency, while OFDM is used in WLAN and digital video broadcast-terrestrial because of its multipath mitigation capability. These advantages of MSK and OFDM modulations render them as promising modulation candidates for future GNSS signals to offer enhanced pe

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Prathap, Dr Joseph Anthony, Maruthi Pottella, Srikanth Thammisetti, and Sainath Rachakonda. "FPGA based Design of Triple Modular Redundancy for Hybrid Digital Pulse Width Modulation Generator." Revista Gestão Inovação e Tecnologias 11, no. 2 (2021): 2249–59. http://dx.doi.org/10.47059/revistageintec.v11i2.1885.

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This paper proposes the Triple Modular Redundancy checker for the Hybrid Digital Pulse Width Modulation generator to verify the correctness in the output signal. The proposed design involves replicating the Hybrid Digital Pulse Width Modulation Generator thrice and the majority voter circuit validates the correct output by considering the two accurate signals out of the three outputs. The digital pulse width modulation generator is broadly classified as Counter-based Digital Pulse Width Modulation, Delay line-based Digital Pulse Width Modulation, and Hybrid-based Digital Pulse Width Modulation

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Nidhi, Nitin, Pin-En Su, and Sudhakar Pamarti. "Open-Loop Wide-Bandwidth Phase Modulation Techniques." Journal of Electrical and Computer Engineering 2011 (2011): 1–12. http://dx.doi.org/10.1155/2011/507381.

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The ever-increasing growth in the bandwidth of wireless communication channels requires the transmitter to be wide-bandwidth and power-efficient. Polar and outphasing transmitter topologies are two promising candidates for such applications, in future. Both these architectures require a wide-bandwidth phase modulator. Open-loop phase modulation presents a viable solution for achieving wide-bandwidth operation. An overview of prior art and recent approaches for phase modulation is presented in this paper. Phase quantization noise cancellation was recently introduced to lower the out-of-band noi

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N, Sharan, Suma V. Shetty, and Dr H. C. Sateesh Kumar. "Digital Modulation in Modern Communication Systems." INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 09, no. 04 (2025): 1–9. https://doi.org/10.55041/ijsrem43721.

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Digital modulation is a fundamental technology in modern communication systems, enabling efficient and reliable data transmission over wired and wireless networks. Compared to analog modulation, digital techniques such as Phase Shift Keying (PSK), Quadrature Amplitude Modulation (QAM), and Orthogonal Frequency Division Multiplexing (OFDM) offer higher data rates, superior noise immunity, and better spectral efficiency. These advantages make digital modulation essential for applications in mobile communication, satellite systems, and the Internet of Things (IoT). Additionally, digital modulatio

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Nugroho, Prapto. "Design of a 20 Mbps OQPSK Modulator Based on Multiplexers." JURNAL INFOTEL 16, no. 4 (2024): 855–70. https://doi.org/10.20895/infotel.v16i4.1237.

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This paper aims to delve into the design and implementation aspects of an OQPSK (Offset Quadrature Phase Shift Keying) modulator within the context of modem technology, underscoring its pivotal role in contemporary information technology infrastructure. The research primarily focuses on elucidating the theoretical foundations of OQPSK modulation, which represents an enhancement of QPSK modulation techniques. Central to the design is the utilization of a multiplexer to select one carrier signal out of four, which is subsequently modulated by data bits. Furthermore, the modulator employs two squ

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Kunisa, A., S. Takahashi, and N. Itoh. "Digital modulation method for recordable digital video disc." IEEE Transactions on Consumer Electronics 42, no. 3 (1996): 820–25. http://dx.doi.org/10.1109/30.536191.

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Katoh, Hisakazu, Tomohiro Saitoh, Masaru Takechi, and Hajime Matsumura. "A Digital Modulation Scheme for Digital Satellite Broadcasting." Journal of the Institute of Television Engineers of Japan 47, no. 10 (1993): 1358–66. http://dx.doi.org/10.3169/itej1978.47.1358.

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Vijaya, C. "Digital Modulation & Detection Techniques Using FRFT Basis Functions." Bonfring International Journal of Research in Communication Engineering 6, Special Issue (2016): 44–47. http://dx.doi.org/10.9756/bijrce.8198.

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Gohokar, V. V. "Simulation of Digital Modulation Techniques." IETE Journal of Education 53, no. 1 (2012): 5–8. http://dx.doi.org/10.1080/09747338.2012.10876089.

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Bobinsky, E. "Digital modulation techniques [Book Review]." IEEE Communications Magazine 39, no. 6 (2001): 24–28. http://dx.doi.org/10.1109/mcom.2001.925668.

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Amuru, SaiDhiraj, and R. Michael Buehrer. "Optimal Jamming Against Digital Modulation." IEEE Transactions on Information Forensics and Security 10, no. 10 (2015): 2212–24. http://dx.doi.org/10.1109/tifs.2015.2451081.

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Pandey, R., H. Leib, and S. Pasupathy. "Noncoherently orthogonal digital phase modulation." IEEE Transactions on Communications 40, no. 6 (1992): 992–95. http://dx.doi.org/10.1109/26.142788.

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Abou Haidar, Gaby, Roger Achkar, and Hasan Dourgham. "Quality Verification of Audio and Image Modulation by the Simulation of PCM, DM and DPCM Systems." International Journal of Information and Communication Sciences 3, no. 4 (2019): 110–20. http://dx.doi.org/10.11648/j.ijics.20180304.11.

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Modulation is a process through which a message has to pass in order to be effectively transmitted. However, there are some limitations to Pulse Code Modulation and Delta Modulation that can cause data redundancy, quantization error, slope overload distortion and granular noise which result in a bad communication process. Throughout the past few years, Pulse Code Modulation (PCM), Delta Modulation (DM) and Differential Pulse Code Modulation (DPCM), in digital communication systems, have proven to have unparalleled advantages over analog communication systems; this is in terms of error minimiza

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Wisland, Dag T., Mats E. Høvin та Tor S. Lande. "A Non-Feedback -Σ Modulator for Digital-to-Analog Conversion Using Digital Frequency Modulation". Analog Integrated Circuits and Signal Processing 41, № 2/3 (2004): 209–22. http://dx.doi.org/10.1023/b:alog.0000041637.75702.c3.

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Abdul, Rasak Zubair. "Experiments on Digital Filtering of Analog Signals: Pulse Amplitude Modulation and Delta Modulation." Global Journal of Engineering and Technology Advances 16, no. 1 (2023): 083–98. https://doi.org/10.5281/zenodo.8285465.

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To boost students' active learning and understanding of abstract scientific concepts, hands-on learning experiences such as experiments are necessary. Computer simulations also allow students to carry out experiments virtually. Analog signals are processed using digital signal processing because of the advantages of digital signal processing over analog signal processing. Numerical experiments, results, and observations on digital band pass filtering of analog signals are presented. Two types of digital modulation are employed: Pulse Amplitude Modulation (PAM) and Delta Modulation (DM). Re

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Xin, Yongqing, and Mirosław Pawlak. "M-Ary Phase Modulation for Digital Watermarking." International Journal of Applied Mathematics and Computer Science 18, no. 1 (2008): 93–104. http://dx.doi.org/10.2478/v10006-008-0009-8.

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M-Ary Phase Modulation for Digital WatermarkingIn spread spectrum based watermarking schemes, it is a challenging task to embed multiple bits of information into the host signal.M-ary modulation has been proposed as an effective approach to multibit watermarking. It has been proved that anM-ary modulation based watermarking system outperforms significantly a binary modulation based watermarking system. However, in the existingM-ary modulation based algorithms, the value ofMis restricted to be less than 256, because asMincreases, the computation workload for data extraction advances exponential

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Li, Rong. "Digital Modulation Recognition in Different Environments." Advanced Materials Research 1049-1050 (October 2014): 2084–87. http://dx.doi.org/10.4028/www.scientific.net/amr.1049-1050.2084.

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For the using of multi-modulation, the precondition of receiving and demodulating signal is to determine the type of the modulation, so automatic recognition of modulation signal has significant influence on the analysis of the signals. In this paper, digital modulation recognition is studied respectively in different environment of White Gaussian Noise (WGN), stationary interference and multipath interference. The simulation results show that the recognition success rate is the highest in stationary interference environment and the lowest in multipath interference environment with the same si

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Miao, Bin Ying, Zheng Ning Tang, Sha Sha Wang, and Jia Xiang Chen. "Imaging Characteristics Analysis of GLV-Based Thermal CTP System." Applied Mechanics and Materials 713-715 (January 2015): 690–93. http://dx.doi.org/10.4028/www.scientific.net/amm.713-715.690.

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The Grating Light Valve (GLV) is a spatial light modulator based on Micro Electro Mechanical Systems (MEMS), and it has been successfully applied in the computer-to-plate (CTP) system by modulating laser beams. Fast modulation rate, a mass of pixels, and high power handling capability of the GLV device increase imaging speed. Digital working states, combine of two GLV pixels and exact beam shape improve imaging quality. Numerical calculation and graph analysis using MATLAB software show that imaging quality of GLV-based thermal CTP system is higher than that of traditional acousto-optic modula

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HULA, Iho, and Oleksiy POLIKAROVSKYKH. "METHOD OF DETERMINING PARAMETERS OF MODULATION OF UAV SIGNALS USING ARTIFICIAL NEURAL NETWORKS." Herald of Khmelnytskyi National University. Technical sciences 315, no. 6 (2022): 47–54. http://dx.doi.org/10.31891/2307-5732-2022-315-6(2)-47-54.

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The article is devoted to the consideration of the issue of determining the parameters of the modulation of signals of unmanned aerial vehicles using artificial neural networks by recognizing the types of digital modulation and is performed by a system that automatically classifies the type of digital modulation of the received signal. Recognition of digital modulation types is used, which automatically classifies the type of digital modulation of the received signal. The following issues are covered in the article: the analysis of existing approaches in the task of automatic recognition of ty

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Ghauri, Sajjad Ahmed. "KNN BASED CLASSIFICATION OF DIGITAL MODULATED SIGNALS." IIUM Engineering Journal 17, no. 2 (2016): 71–82. http://dx.doi.org/10.31436/iiumej.v17i2.641.

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Demodulation process without the knowledge of modulation scheme requires Automatic Modulation Classification (AMC). When receiver has limited information about received signal then AMC become essential process. AMC finds important place in the field many civil and military fields such as modern electronic warfare, interfering source recognition, frequency management, link adaptation etc. In this paper we explore the use of K-nearest neighbor (KNN) for modulation classification with different distance measurement methods. Five modulation schemes are used for classification purpose which is Bina

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Ali, Kumar &. Lal‎. "Design and Analysis of ‎Single-bit Ternary Band-pass ‎Digital Filter." Kardan Journal of Engineering and Technology 2, no. 1 (2020): 76–85. https://doi.org/10.31841/KJET.2021.14.

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Recently, various general-purpose sigma-delta modulation based general purpose DSP algorithms have been reported that possess simpler multiplier complexity, lower power consumption and less chip area features. Here in exploration, our goal is to carry on designing a ternary-bit DSP algorithm in which significant design element is a sigma delta modulator. The formation sigma - delta (SDM) has an amount of very pleasant and attractive possessions and inborn linearity which is extensively consumed in communication systems. Signal is sampled more than that of Nyquist rate commonly word used oversa

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M, Adarsha, S. Malathi, and Santosh Kumar. "Analysis of System Capacity and Spectral Efficiency of Fixed-Grid Network." International journal of Computer Networks & Communications 15, no. 5 (2023): 93–111. http://dx.doi.org/10.5121/ijcnc.2023.15506.

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In this article, the performance of a fixed grid network is examined for various modulation formats to estimate the system's capacity and spectral efficiency. The optical In-phase Quadrature Modulator (IQM) structure is used to build a fixed grid network modulation, and the homodyne detection approach is used for the receiver. Data multiplexing is accomplished using the Polarization Division Multiplexed (PDM) technology. 100 Gbps, 150 Gbps, and 200 Gbps data rates are transmitted under these circumstances utilizing various modulation formats. Various pre-processing and signal recovery steps ar

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Su, Lin Bo, Jian Hua Chen, and Ying Peng Hu. "The Study of Coded CPM Schemes." Applied Mechanics and Materials 198-199 (September 2012): 1408–12. http://dx.doi.org/10.4028/www.scientific.net/amm.198-199.1408.

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Continuous Phase Modulation (CPM) schemes belong to a class of constant-envelope digital modulation schemes, the constant-envelope nature of the CPM signals makes them robust for the nonlinear and fading channels, and very useful for the satellite and/or the mobile radio channels. Comparing to PSK modulation, CPM modulation can not only provide spectral economy, but also exhibit a “coding gain”. CPM can be decomposed into a Continuous Phase Encoder (CPE) followed by a Memoryless Modulator (MM), this allows many new coded modulation schemes of combination of convolutional encoder and CPM modula

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