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Journal articles on the topic 'M-QAM MODULATION'

Author: Grafiati

Published: 11 September 2023

Last updated: 31 July 2025

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1

Ahmad, Husham Jawad. "Performance Evaluation and Simulation of M-Ary Quadrature Amplitude Modulation Schemes with VisSim/Comm Software." Cihan University-Erbil Scientific Journal 3, no. 2 (2019): 58–63. http://dx.doi.org/10.24086/cuesj.v3n2y2019.pp58-63.

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M-ary modulation schemes are considered one of widely used digital modulation in practice because of its high efficiency in power and bandwidth. Therefore, this necessity the need to study and evaluate the performance of M-ary schemes using simulation techniques. In this paper, the performance of M-ary modulations schemes M-ary quadrature amplitude modulation (QAM) is considered. Because of its efficiency in power and bandwidth, M-ary QAM (M-QAM) is one of the widely used modulation techniques in practice. Therefore, a need for studying and evaluating the performance of QAM modulation schemes

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Ikhsan, Danang Maulana, and Theophilus Wellem. "SIMULASI SKEMA MODULASI 1024-QAM DAN 4096-QAM PADA SISTEM KOMUNIKASI DIGITAL." Jurnal Indonesia : Manajemen Informatika dan Komunikasi 4, no. 3 (2023): 1356–64. http://dx.doi.org/10.35870/jimik.v4i3.321.

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Quadrature amplitude modulation (QAM) is a modulation scheme used by digital communication systems to obtain high data rates in bandwidth-limited channels. M-ary QAM schemes with M values greater than 256 are currently used by wireless network standards, such as WiFi 6 and WiFi 7 (final standard will be released in 2024), which use the 1024-QAM and 4096-QAM modulation schemes, respectively. With the continuous development of technology for digital communication systems, both wireline and wireless, it is essential to research regarding advanced modulation schemes. This study discusses the simul

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Ali, Ahmed K., and Ergun Erçelebi. "An M-QAM Signal Modulation Recognition Algorithm in AWGN Channel." Scientific Programming 2019 (May 12, 2019): 1–17. http://dx.doi.org/10.1155/2019/6752694.

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Computing the distinct features from input data, before the classification, is a part of complexity to the methods of automatic modulation classification (AMC) which deals with modulation classification and is a pattern recognition problem. However, the algorithms that focus on multilevel quadrature amplitude modulation (M-QAM) which underneath different channel scenarios is well detailed. A search of the literature revealed that few studies were performed on the classification of high-order M-QAM modulation schemes such as 128-QAM, 256-QAM, 512-QAM, and 1024-QAM. This work focuses on the inve

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B, Ch Kiran Patrudu* D.Anil Prasad B. Ravi Kumar. "DIFFERENT SPREADING SEQUENCES FOR PERFORMANCE COMPARISON OF DS-SS SYSTEM." Global Journal of Engineering Science and Research Management 5, no. 6 (2018): 84–89. https://doi.org/10.5281/zenodo.1302265.

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In this work, the performance analysis of Bit Error rate (BER) Vs Ratio of Bit Energy to Noise Power Spectral Density (Eb/No) of simulink based DS-SS system is presented using the BERTool module. We have simulated the DS-SS system simulink model with 16-QAM, 32-QAM 64-QAM modulation techniques and from the simulation results it is found that bit error rate is increasing as the value of M increases i.e bit rerror rate of 64-QAM is higher than the bit error rate of 32-QAM. Similarly bit error rate of 32-QAM is higher than the bit error rate of 16-QAM. Also DS-SS system with M-QAM modulation usin

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Zekry, Abdelhalim, Christena Ghandour, Nazmi A. Mohammed, and S. El-Rabaie. "Hybrid modulation schemes for data transmission improvement of indoor visible light communication system." International Journal of Engineering & Technology 7, no. 4 (2018): 2822. http://dx.doi.org/10.14419/ijet.v7i4.19423.

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This work enhances the bit rate characteristics, receiver sensitivity and power requirements of multicarrier modulation schemes (MCM) for visible light communication (VLC) dimming control system at bit error rate (BER) less than 10-3. This study develops the mathematical formulation for merging pulse position modulation (PPM) and overlapping pulse position modulation (OPPM) with M-ary quadrature amplitude modulation DC-Biased optical orthogonal frequency division multiplexing (M-QAM DCO OFDM), which can achieve efficient data transmission while maintaining communication quality. These schemes

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Quilindo Méndez, Cristian David, Eduar Fernando Hoyos Zúñiga, and Gustavo Adolfo Gómez Agredo. "Efecto de la técnica de modulación M-QAM para una infraestructura de red convergente Radio sobre Fibra (RoF)." Ingeniería y Desarrollo 39, no. 1 (2021): 66–85. http://dx.doi.org/10.14482/inde.39.1.621.3821.

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The objective of the research is to analyze, at the simulation level, the effect of the M-Quadrature Amplitude Modulation (M-QAM) technique, in the downlink, for a converged Radio over Fiber (RoF) network infrastructure, implementing the Ortho-gonal Frequency Division Multiplexing (OFDM) technique and the Passive Optical Network architecture, with 10 Gbps capa-city (XG-PON). The evaluation of the effect of the M-QAM modulation technique was done through a pre-established simulation methodology and using the optsim sof-tware for the network model and tests. In the results of the research, the i

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Giraudo, E. C., R. B. Filho, and R. R. Scarabucci. "On the {m-QAM}2 modulation." IEEE Communications Letters 5, no. 10 (2001): 426–28. http://dx.doi.org/10.1109/4234.957383.

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Farhan, Mhnd. "Coded Orthogonal Frequency Division Multiplexing System : An Overview." Indonesian Applied Physics Letters 4, no. 2 (2023): 57–64. http://dx.doi.org/10.20473/iapl.v4i2.49248.

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This article compares the performance of two modulation techniques—quadrature phase shift keying (QPSK) and M-ary quadrature amplitude modulation (M-QAM) with M=8, 16, 32, and 64—in a coded orthogonal frequency division multiplexing system. As an error-correcting code, convolutional technology is employed. A vehicular channel with additive white gaussian noise (AWGN) is utilized for communication. According to simulation data, for QPSK and M-QAM, a coded orthogonal frequency division multiplexing system performs better than an uncoded one. Additionally, the system performs better with QPSK tha

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9

ARYANTA, DWI, ARSYAD RAMADHAN DARLIS, and WIRDA SRI FARHANI. "Simulasi Sinkronisasi Carrier pada Modulasi Digital menggunakan Matlab." ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika 2, no. 2 (2014): 100. http://dx.doi.org/10.26760/elkomika.v2i2.100.

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ABSTRAKDalam sistem komunikasi digital, salah satu manfaat teknik pengkodean adalah sebagai efisiensi bandwidth. Pada kanal komunikasi, adanya noise akan mengganggu dan menurunkan kinerja sistem komunikasi digital. Hal ini menyebabkan terjadinya kesalahan pendeteksian sinyal pembawa, yang mengakibatkan terjadi perubahan bit atau simbol pada sisi penerima. Untuk mengurangi kesalahan deteksi, maka dibutuhkan suatu mekanisme sinkronisasi carrier di sisi penerima untuk mendapatkan data yang serupa dengan data yang dikirim. Simulasi sinkronisasi carrier pada penelitian ini menggunakan metode carrie

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Maharani, Tamara, Muhammad Agus Zainuddin, and Sritrusta Sukaridhoto. "PENGUKURAN PSNR PADA TRANSMISI VIDEO DI KANAL TERAHERTZ MENGGUNAKAN QAM MODULATION." KLIK - KUMPULAN JURNAL ILMU KOMPUTER 7, no. 2 (2020): 154. http://dx.doi.org/10.20527/klik.v7i2.319.

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<p><em>In the current era of communication has various challenges that include the intensity of information exchange more often, the amount of information carried and the speed in exchanging information. Communication is not only in the form of text and sound but also in the form of pictures and videos. This study tries to use digital data in the form of video with the aim of providing a view of the PSNR measurement simulation. The method used is modulation of QAM 64, 256, 1024 and 4096 through terahertz channels (0.1-10 THz). Simulation results show that in QAM 64 the PSNR value i

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Mohammed, Ali Abdulwahhab, Li Yu, Manar Al-Kali, and Desheng Wang. "Analysis of Amplify-and-Forward Cooperative Networks with Nakagami-m fading Channels For MRC Diversity Combining." TELKOMNIKA Indonesian Journal of Electrical Engineering 16, no. 3 (2015): 546. http://dx.doi.org/10.11591/tijee.v16i3.1646.

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In this paper we study the effect of diversity combining for Nakagami -m fading Channels in the amplify-and-forward cooperative networks.We derive the cumulative density function (CDF), probability density function (PDF) and moment generating function (MGF) for the multiple relay amplify-and-forward network with single half duplex channel maximal ratio combiner (MRC). In this network we investigate the cases of MRC at the destination, as well derive the exact Symbol Error Rate (SER) of M-ary phase-shift keying (M-PSK), and quadrature amplitude modulation (M-QAM) in Nakagami -m fading environme

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Chai, Yukun. "Performance Analysis of QAM Modulation and Demodulation." Highlights in Science, Engineering and Technology 134 (March 30, 2025): 114–25. https://doi.org/10.54097/h1mrdy13.

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The following study will investigate the performance of Multiple Quadrature Amplitude Modulation(M-QAM) in baseband modulation systems and further analyze the bit error rates (BER) performance under different conditions of communication. The error performance of several M-QAM schemes has been extensively simulated and analyzed under ideal Additive white Gaussian noise (AWGN) channel conditions. The influences of some common channel impairments, such as frequency offset and partial band interference, on the performance of the system are also taken into consideration to assess the reliability of

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13

Ge, Qian, Qian Wang, Xiao Yan, and Ling He. "Algorithms for Automatic Modulation Recognition in Wireless Monitoring Applications." Applied Mechanics and Materials 241-244 (December 2012): 1772–78. http://dx.doi.org/10.4028/www.scientific.net/amm.241-244.1772.

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The paper proposes an automatic modulation recognition scheme based on instantaneous features of intercepted signals. The modulation classifier can discriminate modulations such as Amplitude Modulation (AM), Double Side Band (DSB), Single Side Band (SSB), Frequency Modulation (FM), M-ary Amplitude Shift Keying (M-ASK), M-ary Frequency Shift Keying (M-FSK), M-ary Phase Shift Keying (M-PSK) and M-ary Quadrature Amplitude Modulation (M-QAM) without any prior information. The scheme is with simple structure, computationally simpler, and suitable for real-time processing. And the recognition parame

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Yang, Li Ming, Jia Guo, Hong Wei Ding, Yong Wang, Hong Mei Li, and Han Bai Shao. "Simulation Implementation and Analysis of the Performance of M-QAM by Using MATLAB." Applied Mechanics and Materials 610 (August 2014): 933–38. http://dx.doi.org/10.4028/www.scientific.net/amm.610.933.

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For the implementation of digital multimedia communication, an efficient, reliable, deterministic transmission system plays a vital role. Quadrature amplitude modulation (QAM) is commonly used in digital communication systems. We focuses on simulation and analysis of M-level QAM by using MATLAB in this paper.

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Wongroekdee, Sawitree, Kosin Chaiprathum, Virasit Imtawil, and Puripong Suthisopapan. "LDPC Coded 2^m-ary QAM for Ultra High Speed Communications." Applied Mechanics and Materials 781 (August 2015): 45–48. http://dx.doi.org/10.4028/www.scientific.net/amm.781.45.

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Modern communication systems that employ LDPC codes and QAM modulation can achieve high speed and reliable transmission without bandwidth expansion. In this paper, the performances of LDPC codes with 2m- ary QAM at m>10, which can provide enormous bandwidth efficiency, are studied. Bit error rate performances of various combinations of LDPC codes and order of QAM are provided. From the results, the performance of LDPC coded ultra-high order QAM is excellent making this system very attractive for ultra-high speed communications.

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Kachroo, Amit, Adithya Popuri, Mostafa Ibrahim, Ali Imran, and Sabit Ekin. "Interference Spreading through Random Subcarrier Allocation Technique and Its Error Rate Performance in Cognitive Radio Networks." Sensors 20, no. 19 (2020): 5700. http://dx.doi.org/10.3390/s20195700.

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In this letter, we investigate the idea of interference spreading and its effect on bit error rate (BER) performance in a cognitive radio network (CRN). The interference spreading phenomenon is caused because of the random allocation of subcarriers in an orthogonal frequency division multiplexing (OFDM)-based CRN without any spectrum-sensing mechanism. The CRN assumed in this work is of underlay configuration, where the frequency bands are accessed concurrently by both primary users (PUs) and secondary users (SUs). With random allocation, subcarrier collisions occur among the carriers of prima

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Khair, Fauza, Dodi Zulherman, and Rifani Auliana. "Software-based simulation to analyze the variation of digital modulation and atmospheric condition on the free space optic (FSO) link performance." JURNAL INFOTEL 14, no. 3 (2022): 214–19. http://dx.doi.org/10.20895/infotel.v14i3.758.

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Free Space Optic (FSO) is the solution for telecommunications technology that offers high data rates, wide bandwidth, and low power consumption. However, to maximize the performance of the FSO system, the modulation used should be considered in environmental conditions. This study aims to compare the performance of the FSO communication link based on digital modulation variations used in various weather conditions, including sunny, rainy, and foggy weather. This study uses two attenuation models, namely the Kim and Kruse models, with variations in transmission distance from 500 meters to 10 ki

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Sarfraz, Mubashar, Sheraz Alam, Sajjad A. Ghauri, et al. "Random Graph-Based M-QAM Classification for MIMO Systems." Wireless Communications and Mobile Computing 2022 (April 15, 2022): 1–10. http://dx.doi.org/10.1155/2022/9419764.

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Automatic modulation classification (AMC) has been identified to perform a key role to realize technologies such as cognitive radio, dynamic spectrum management, and interference identification that are arguably pivotal to practical SG communication networks. Random graphs (RGs) have been used to better understand graph behavior and to tackle combinatorial challenges in general. In this research article, a novel modulation classifier is presented to recognize M-Quadrature Amplitude Modulation (QAM) signals using random graph theory. The proposed method demonstrates improved recognition rates f

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Nguyen, Huu Minh, Xuan Nam Tran, Van Bien Pham, and Cong Dinh Nguyen. "Low-Complexity Estimation for Spatially Modulated Physical-Layer Network Coding Systems." Wireless Communications and Mobile Computing 2018 (October 1, 2018): 1–13. http://dx.doi.org/10.1155/2018/6310519.

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This paper proposes a low-complexity signal estimator at the relay node for a spatially modulated physical-layer network coding system. In the considered system, the two terminal nodes use spatial modulation to transmit their signals to the relay node during the multiple access phase. Based on the channel quantization method, we propose a low-complexity estimator which can detect both antenna indices and M-QAM symbols using successive interference cancellation (SIC). Moreover, we design signal constellations for a combined signal component at the relay for arbitrary M-QAM modulation. The obtai

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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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Akhtar, Jobaida, Mohammad Istiaque Reja, Md Al Amin, and Md Sahidur Rahman. "A Comprehensive Performance Analysis of MIMO-OFDM Technology Using Different MIMO Configurations and M-QAM Modulation Schemes for LTE Cellular Network." Modern Applied Science 12, no. 4 (2018): 118. http://dx.doi.org/10.5539/mas.v12n4p118.

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MIMO-OFDM (Multiple Input Multiple Output-Orthogonal Frequency Division Multiplexing) uses multiple antennas at transmitter and receiver side to facilitate high throughput performance without needing additional bandwidth or transmission power. But frequency synchronization, Inter Carrier Interference (ICI) minimization and antenna diversity are the main challenges for MIMO-OFDM wireless technology. In this paper, a MIMO-OFDM hybrid model is designed with proper frequency synchronization and antenna diversity that minimizes ICI with improved signal strength. Using the model a comprehensive anal

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Apolo, Juan Andrés, Beatriz Ortega, and Vicenç Almenar. "Hybrid POF/VLC Links Based on a Single LED for Indoor Communications." Photonics 8, no. 7 (2021): 254. http://dx.doi.org/10.3390/photonics8070254.

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A hybrid fiber/wireless link based on a single visible LED and free of opto-electronic intermediate conversion stages has been demonstrated for indoor communications. This paper shows the main guidelines for proper coupling in fiber/air/detector interfaces. Experimental demonstration has validated the design results with very good agreement between geometrical optics simulation and received optical power measurements. Different signal bandwidths and modulation formats, i.e., QPSK, 16-QAM, and 64-QAM, have been transmitted over 1.5 m polymer optical fiber (POF) and 1.5 m free-space optics (FSO)

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Islam, Md Matiqul, Md Ashraful Islam, Md Kamal Uddin, and Sujan Chandra Roy. "Performance evaluation of polar coded neural demapper based 5G MIMO communication system by varying antenna size." Multidisciplinary Science Journal 5, no. 3 (2023): 2023028. http://dx.doi.org/10.31893/multiscience.2023028.

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This paper proposes a Polar-coded neural damapper based 5G multiple-input multiple-output (MIMO) system for M transmitting and N receiving antenna, operating in a flat fading environment. MIMO is a spatial diversity scheme to improve channel performance and mitigate troubling fading issues in urban environments. A neural network-based smart demapper is considered instead of traditional demapper to improve the system's performance. Researchers have recently focused on developing complex neural network (NN)-based demapper on generating soft information for each transmitted bit. Neural demapper a

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Yang, Zhuwen, and Guofa Cai. "Design of a New Non-Coherent Cross-QAM-Based M-ary DCSK Communication System." Electronics 11, no. 19 (2022): 3128. http://dx.doi.org/10.3390/electronics11193128.

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In this paper, a new non-coherent cross-quadrature amplitude modulation (XQAM)-based M-ary differential chaos shift keying (XQAM-MDCSK) system is proposed. In such a system, an autocorrelator is adopted at the receiver to obtain the channel compensation value. This framework can be extended to various amplitude phase shift keying-based MDCSK systems, such as star QAM-based MDCSK (star QAM-MDCSK) and square QAM-based MDCSK (SQAM-MDCSK) systems. Moreover, the bit error rate (BER) expression of the proposed XQAM-MDCSK system is derived over a multipath Rayleigh fading channel. Results show that t

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Quan, Zhi, Jiyu Luo, Hailong Zhang, and Li Jiang. "Efficient Massive MIMO Detection for M-QAM Symbols." Entropy 25, no. 3 (2023): 391. http://dx.doi.org/10.3390/e25030391.

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Massive multiple-input multiple-output (MIMO) systems significantly outperform small-scale MIMO systems in terms of data rate, making them an enabling technology for next-generation wireless systems. However, the increased number of antennas increases the computational difficulty of data detection, necessitating more efficient detection techniques. This paper presents a detector based on joint deregularized and box-constrained dichotomous coordinate descent (BOXDCD) with iterations for rectangular m-ary quadrature amplitude modulation (M-QAM) symbols. Deregularization maximized the energy of t

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Ahmed, E. Zakzouk, M. Elbakar Ragab, and I. Yousef Mohamed. "Bit Error Rate (BER) Performance of MIMO Systems in M-QAM with Nonlinear Effect." International Journal of Engineering and Advanced Technology (IJEAT) 9, no. 2 (2019): 265–67. https://doi.org/10.35940/ijeat.B2642.129219.

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Out object in this paper it to study, the effect of nonlinearity on the bit error rate (BER) of MIMO systems in M-QAM modulation techniques. We consider Saleh’s model (power amplifier model) for the nonlinearity, and apply the nonlinear model on MIMO system with receiver diversity and transmitter diversity. For transmitter diversity, the Space-Time Block Coding (STBC) based on Alamouti scheme is used to provide transmits diversity for two transmitting antennas. The results show that, if there is a high variation in the amplitude of the M- QAM symbols, there will behigh effect of nonlinea

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Bibarsov, M. R., S. V. Dvornikov, A. F. Kryachko, and A. V. Pshenichnikov. "Scientific and Engineering Proposals for Improving the Noise Immunity of Receiving Multi-Position Signals in Channels with Variable Parameters." Journal of the Russian Universities. Radioelectronics 26, no. 6 (2023): 6–15. http://dx.doi.org/10.32603/1993-8985-2023-26-6-6-15.

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Introduction. An important task faced by the developers of modern telecommunication systems consists in increasing the noise immunity of signal reception in channels with variable parameters. Thus, the communication lines of DVB-T2, DVB-S, and DVB-S2/S2 standards widely apply signal structures (SS) of multi-position quadrature amplitude modulation (M-QAM). However, an analysis of scientific publications shows that the random nature of the phase change of the transformed signal constellation leads to a loss of noise immunity of the M-QAM signals. Engineering solutions for the effective receptio

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Khatoon, A., and M. S. Rahman. "Symbol Error Performance Analysis and Comparison Between Alamouti and MRRC Diversity Combining Scheme for Wireless Communication." Journal of Scientific Research 2, no. 1 (2009): 54–66. http://dx.doi.org/10.3329/jsr.v2i1.3000.

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The symbol error performance of a wireless communication system is analyzed using diversity combining scheme in Rayleigh fading channels. The performance of the system is compared using Alamouti scheme and maximal-ratio receiver combining (MRRC) scheme. The performance results of the system are evaluated by numerical computation and by simulation using MATLAB. A detailed analysis and exact (closed-form) expressions of the probability of error of the wireless communication systems in Rayleigh fading channels are provided for both M-ary phase-shift keying (M-PSK) and M-ary quadrature amplitude m

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Escobar Pérez, Alejandro, Karen Arroyave Giraldo, Jhon Anderson Lopera Cortés, and Jhon James Granada Torres. "Mitigation of Nonlinear Effects using Machine Learning in Coherent Optical Access Networks." Inge CuC 17, no. 2 (2021): 11–20. http://dx.doi.org/10.17981/ingecuc.17.2.2021.02.

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Introduction/Context: The use of coherent detection jointly with high-level modulation formats such as 16 and 64-QAM seems to be a convenient strategy to increment capacity of future optical access networks. However, coherent detection requires high complexity digital signal processing to mitigate different impairments. Objective: Mitigate signal distortions using nonsymmetrical demodulation techniques based on Machine Learning (ML) algorithms. Methodology: First, a single channel Nyquist m-QAM system at 28 and 32 Gbps was simulated in VPIDesignSuite software. Then, different signals modulated

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Paramonov, A. A., and V. V. Chu. "Noise immunity of QAM-OFDM signal reception using soft-decision demodulation in the presence of narrowband interference." Russian Technological Journal 12, no. 5 (2024): 17–32. http://dx.doi.org/10.32362/2500-316x-2024-12-5-17-32.

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Objectives. The aim of this paper is to study the noise immunity of digital information transmission in systems with orthogonal frequency division multiplexing (OFDM) and quadrature amplitude modulation (QAM) of subcarriers in the presence of narrowband interference. As a way of managing this interference, the paper studies the use of a demodulator with soft outputs and subsequent decoding of the convolutional code and low-density paritycheck (LDPC) code used in the system.Methods. The results presented in the article were obtained using statistical radio engineering, mathematical statistics,

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Родионов, А. Ю., А. А. Власов, Д. А. Кузин, В. В. Бобров, А. А. Кирьянов та И. В. Гребенюк. "Нейросетевое распознавание сигнальных созвездий M-QAM типа в магнитно-индукционном подводном канале связи". MORSKIE INTELLEKTUAL`NYE TEHNOLOGII)</msg> 4, № 4(66) (2024): 69–76. https://doi.org/10.37220/mit.2024.66.4.081.

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В статье представлен анализ возможностей применения нейросетевого распознавания сигнальных созвездий M-QAM магнитно-индуктивной связи для межсредных коммуникационных систем, включая подводные робототехнические комплексы. Рассмотрены особенности распространения магнитного поля в морской воде, включая его устойчивость к внешним воздействиям и помехам. Проведен эксперимент с использованием малогабаритных ферритовых антенн низкочастотного диапазона и систем связи на основе многочастотных сигналов OFDM с различными видами цифровой модуляции M-QAM. Отмечены преимущества магнитно-индуктивной связи в

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Marriwala, Nikhil, Gnana Kousalya C., B. Rajasekar, N. M. Nandhitha, Ashu Gautam, and Aarti Sangwan. "Novel Real-Time Decision-Based Carrier Tracking for Software-Defined Radios Using M-ARY QAM Modulation." International Journal of Decision Support System Technology 15, no. 1 (2023): 1–31. http://dx.doi.org/10.4018/ijdsst.317332.

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In this paper, a scalable and real-time decision-based carrier tracking for software defined radio (SDR) for M-ary QAM modulation has been proposed and tested in real-time using the universal software radio peripheral (USRP)-2922. The proposed system provides real-time decision-based carrier tracking for improved efficiency and performance. The real-time transfer of data has been done using the USRP-2922 hardware using the M-ary QAM modulation scheme for data transmission. The novelty of the proposed system is that one can transfer random data (binary bits), text or an image which can be encod

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Gao, Yuliang, Alan Pak Tao Lau, and Chao Lu. "Modulation-Format-Independent Carrier Phase Estimation for Square M-QAM Systems." IEEE Photonics Technology Letters 25, no. 11 (2013): 1073–76. http://dx.doi.org/10.1109/lpt.2013.2259226.

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Zhu, Zhechen, Muhammad Waqar Aslam, and Asoke K. Nandi. "Genetic algorithm optimized distribution sampling test for M-QAM modulation classification." Signal Processing 94 (January 2014): 264–77. http://dx.doi.org/10.1016/j.sigpro.2013.05.024.

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Lipkovich, E. B., and V. V. Rabtsevich. "A Method for Calculating of the Efficiency of Communication Systems with Multiple Modulation Types and Multi-Stage Composite Coding." Doklady BGUIR 21, no. 6 (2024): 45–52. http://dx.doi.org/10.35596/1729-7648-2023-21-6-45-52.

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Analytical relations and a methodology for calculating the performance indicators of communication and multimedia broadcasting systems using multi-position modulation types (QAM-M, FM-M, FM-M, CHMS-M, AM-M, OFM-M) and multi-stage coding based on non-systematic convolutional codes and non-binary block Reed-Solomon codes are proposed. The relations obtained are common for studies of noise immunity, corrective capacity, energy and information efficiency of systems, depending on the requirements for reception reliability, modulation format, type of codes used and their parameters. The calculation

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Elgam, Avner, Meir Klemfner, Shachar Silon, Yossi Peretz, and Yosef Pinhasi. "Hard Successive Interference Cancellation for M-QAM MIMO Links in the Presence of Rayleigh Deep-Fading." Sensors 24, no. 15 (2024): 5038. http://dx.doi.org/10.3390/s24155038.

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In our paper, we propose a generalized version of the Alternating Projections Digital Hard Successive Interference Cancellation (AP-HSIC) algorithm that is capable of decoding any order of constellation M in an M-Quadrature Amplitude Modulation (QAM) system. Our approach applies to Rayleigh deep-fading Multiple-Input Multiple-Output (MIMO) channels with high-level Additive White Gaussian Noise (AWGN). It can handle various destructive phenomena without restricting the number of antenna arrays in the transmitter/receiver. Importantly, it does not rely on closed-loop MIMO feedback or the need fo

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Combi, Lorenzo, Alberto Gatto, Pierpaolo Boffi, Umberto Spagnolini, and Paola Parolari. "Optical Multilevel Pulse Width Modulation for Analog Mobile Fronthaul." Photonics 5, no. 4 (2018): 49. http://dx.doi.org/10.3390/photonics5040049.

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The evolution of radio access networks is towards a centralized architecture (C-RAN), with massive antenna deployments and large radio-frequency bandwidths. In the next future, traditional optical transport technologies based on digital radio over fiber will no longer be able to support the mobile fronthaul traffic connecting antennas hosted at remote radio units and centralized baseband units. Analog radio over fiber can be selected to support the mobile fronthaul (MFH) network and, in particular, pulse width modulation (PWM) is a viable alternative for analog signal transport. In order to in

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Marriwala, Nikhil, O. P. Sahu, and Anil Vohra. "Performance Analysis of Multiple FEC Channel Coding Algorithms for Software Defined Radio Using Quadrature Amplitude Modulation." International Journal of Applied Metaheuristic Computing 7, no. 2 (2016): 1–15. http://dx.doi.org/10.4018/ijamc.2016040101.

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This paper describes the development of a Software Defined Radio (SDR)-based Transceiver simulation model using Quadrature Amplitude Modulation (QAM) Scheme and analyze its performance using Forward Error Correction (FEC) channel coding algorithms namely the Convolution and the Turbo Codes. This model efficiently evaluates the performance of high data rate multi array M-QAM, schemes. The performance of these FEC codes is evaluated when the system is subjected to noise and interference in the channel. In this design Additive White Gaussian Noise (AWGN) channel has been considered. The design is

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Talha, Muhammad, Mubashar Sarfraz, Atta Rahman, et al. "Voting-Based Deep Convolutional Neural Networks (VB-DCNNs) for M-QAM and M-PSK Signals Classification." Electronics 12, no. 8 (2023): 1913. http://dx.doi.org/10.3390/electronics12081913.

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Automatic modulation classification (AMC) using convolutional neural networks (CNNs) is an active area of research that has the potential to improve the efficiency and reliability of wireless communication systems significantly. AMC is the approach used in a communication system to detect the type of modulation format at the receiver end. This paper proposes a voting-based deep convolutional neural network (VB-DCNN) for classifying M-QAM and M-PSK signals. M-QAM and M-PSK signal waveforms are generated and passed through the fading channel in the presence of additive white Gaussian noise (AWGN

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Qin, Dong, Yuhao Wang, and Tianqing Zhou. "Average SEP of AF Relaying in Nakagami-m Fading Environments." Wireless Communications and Mobile Computing 2018 (2018): 1–7. http://dx.doi.org/10.1155/2018/6581827.

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This paper is devoted to an investigation of an exact average symbol error probability (SEP) for amplify and forward (AF) relaying in independent Nakagami-m fading environments with a nonnegative integer plus one-half m, which covers many actual scenarios, such as one-side Gaussian distribution (m=0.5). Using moment generating function approach, the closed-form SEP is expressed in the form of Lauricella multivariate hypergeometric function. Four modulation modes are considered: rectangular quadrature amplitude modulation (QAM), M-ary phase shift keying (MPSK), M-ary differential phase shift ke

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T, Jaya, M. Monisha, M. Meena, and C. Sharanya. "Improvement of bit error rate performance of MC-CDMA system by using adaptive digital modulation schemes." International Journal of Engineering & Technology 7, no. 3.3 (2018): 663. http://dx.doi.org/10.14419/ijet.v7i2.33.14863.

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In Wireless Communication, the transmission channel suffers due to multipath propagation and channel dispersion due to Inter Symbol Interference (ISI), thereby degrades the system performance greatly. Future communication requires high data rate and effective utilization of bandwidth. Hence, there is a need to improve the Bit Error Rate (BER). The proposed work is Adaptive Modulation (AM), combined with Multi Carrier Code Division Multiple Access (MC-CDMA) based transmission system. It is a promising way to increase the data rate and it uses bandwidth in a efficient manner. The Adaptive Modula

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Kumngern, Montree, Thanat Nonthaputha, and Fabian Khateb. "Arbitrary Waveform Generators Using Current-Controlled Current Conveyor Transconductance Amplifier and Current Conveyor Analog Switches." Journal of Circuits, Systems and Computers 28, no. 11 (2019): 1950179. http://dx.doi.org/10.1142/s0218126619501792.

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This paper presents a new amplitude modulation (AM), frequency modulation (FM), amplitude shift keying (ASK), frequency shift keying (FSK), phase shift keying (PSK) and quadrature amplitude modulation (QAM) waveform generators using current current-controlled conveyor transconductance amplifier (CCCTA) and current conveyor analog switches (CCASs). The CCCTA around with capacitors and resistors are used to generate high-frequency carrier which is worked as a quadrature oscillator. The oscillating frequency of oscillator can be controlled using the bias current of CCCTA, therefore FM and FSK wav

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Suryawanshi, Rajashree, P. Kavipriya, and B. P. Patil. "A Novel Modulation Scheme of 8x8 MIMO in Industry 4.0." Journal of Cases on Information Technology 23, no. 3 (2021): 1–10. http://dx.doi.org/10.4018/jcit.20210701.oa1.

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A key component in the usage of Industry 4.0 arrangements is the up and coming age of system network, LTE/LTE advanced today, and 5G, later on. Industry 4.0 is conveying private LTE arranges today, as they trust it will give them an upper hand and a solid head start when 5G opens up. LTE uses multiple input multiple output (MIMO), a promising technique to accomplish the necessary data rate. This article presents consequences of 8x8 MIMO framework in fading channel utilizing V-BLAST by means of zero-forcing (ZF) with standard ZF. The relative investigation in the fading channel on account of sy

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Wang, Qiong, Youzhi Wu, Xiaole Du, and Zhijie Yin. "A low complexity detection algorithm for m-QAM in spatial modulation systems." IOP Conference Series: Earth and Environmental Science 69 (June 2017): 012150. http://dx.doi.org/10.1088/1755-1315/69/1/012150.

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Walenczykowska, M., and A. Kawalec. "Type of modulation identification using Wavelet Transform and Neural Network." Bulletin of the Polish Academy of Sciences Technical Sciences 64, no. 1 (2016): 257–61. http://dx.doi.org/10.1515/bpasts-2016-0028.

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Abstract Automatic recognition of the signal modulation type turned out to be useful in many areas, including electronic warfare or surveillance. The wavelet transform is an effective way to extract signal features for identification purposes. In this paper there are M-ary ASK, M-ary PSK, M-ary FSK, M-ary QAM, OOK and MSK signals analysed. The mean value, variance and central moments up to five of continuous wavelet transform (CWT) are used as signal features. The principal component analysis (PCA) is applied to reduce a number of features. A multi-layer neural network trained with backpropaga

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Cordeiro Jr, Joel E., Marcelo S. Alencar, Marina V. Yashina, and Alexander G. Tatashev. "Effect of Epidemic Interference on the Performance of M-ASK, M-PSK and M-QAM Modulation Schemes." Journal of Communications Software and Systems 17, no. 4 (2021): 358–65. http://dx.doi.org/10.24138/jcomss-2021-0179.

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Marey, Amr, Mohamed Marey, and Hala Mostafa. "Novel Deep-Learning Modulation Recognition Algorithm Using 2D Histograms over Wireless Communications Channels." Micromachines 13, no. 9 (2022): 1533. http://dx.doi.org/10.3390/mi13091533.

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Modulation recognition (MR) has become an essential topic in today’s wireless communications systems. Recently, convolutional neural networks (CNNs) have been employed as a potent tool for MR because of their ability to minimize the feature’s susceptibility to its surroundings and reduce the need for human feature extraction and evaluation. In particular, these investigations rely on the unrealistic assumption that the channel coefficient is typically one. This motivates us to overcome the previous constraint by providing a novel MR suited to fading wireless channels. This paper proposes a nov

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Yang, Li Ming, Jia Guo, Hong Wei Ding, Yong Wang, and Yi Fan Zhao. "Simulation Implementation and Analysis of the OFDM Modulated by MPSK and M-QAM." Applied Mechanics and Materials 543-547 (March 2014): 2221–24. http://dx.doi.org/10.4028/www.scientific.net/amm.543-547.2221.

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Simulated for OFDM system modulated by 16PSK, 16QAM and 64QAM, and then we compared and analyzed their performance in the Rayleigh channel and 2 paths Rayleigh channel. Simulation results show that under the same conditions, Bit Error Rate (BER) of MQAM modulation system is lower than the same order MPSKs

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Ng, Wai Pang, Nageswara Lalam, Xuewu Dai, et al. "Integrating Radio-Over-Fiber Communication System and BOTDR Sensor System." Sensors 20, no. 8 (2020): 2232. http://dx.doi.org/10.3390/s20082232.

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In this paper, we propose and experimentally demonstrate for the first time, the integration of a radio-over-fiber (RoF) communication system and a Brillouin optical time-domain reflectometry (BOTDR) distributed sensor system using a single optical fiber link. In this proof-of-concept integrated system, the communication system is composed of three modulation formats of quadrature phase-shift keying (QPSK), 16-quadrature amplitude modulation (16-QAM) and 64-QAM, which are modulated onto an orthogonal frequency division multiplexing (OFDM) signal. Whereas, the BOTDR sensor system is used for st

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F. Mohammed, Hassan, and Ghanim A. Al-Rubaye. "BER PERFORMANCE ANALYSIS OF 4QAM/OFDM OVER DIFFERENT SCENARIOS OF LAPLACE FADING CHANNEL." Journal of Engineering and Sustainable Development 25, Special (2021): 1–26. http://dx.doi.org/10.31272/jeasd.conf.2.1.4.

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Multicarrier transmission, also known as (OFDM) Orthogonal Frequency Division multiplexing, in wireless communications, it has been proven to be an essential technique for countering multipath fading. It has been used successfully for HF radio applications and has been selected as the interface for digital audio transmission, digital terrestrial TV broadcasting, and high-speed wireless local area networks in Europe. In this paper, we suggested a new design for modeling multipath fading channels, such as the Laplace fading channel, in order to discover new simulation results and effects. Furthe

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