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Journal articles on the topic 'OFDM (Orthogonal Frequency Division Multiplexing)'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Junejo, Naveed Ur Rehman, Mariyam Sattar, Saifullah Adnan, et al. "A Survey on Physical Layer Techniques and Challenges in Underwater Communication Systems." Journal of Marine Science and Engineering 11, no. 4 (2023): 885. http://dx.doi.org/10.3390/jmse11040885.

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In the past decades, researchers/scientists have paid attention to the physical layer of underwater communications (UWCs) due to a variety of scientific, military, and civil tasks completed beneath water. This includes numerous activities critical for communication, such as survey and monitoring of oceans, rescue, and response to disasters under the sea. Till the end of the last decade, many review articles addressing the history and survey of UWC have been published which were mostly focused on underwater sensor networks (UWSN), routing protocols, and underwater optical communication (UWOC).

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2

Uppal, Sabhyata, Sanjay Sharma, and Hardeep Singh. "Analytical Investigation on Papr Reduction in OFDM Systems Using Golay Codes." Journal of Electrical Engineering 65, no. 5 (2014): 289–93. http://dx.doi.org/10.2478/jee-2014-0046.

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Abstract Orthogonal frequency division multiplexing (OFDM) is a common technique in multi carrier communications. One of the major issues in developing OFDM is the high peak to average power ratio (PAPR). Golay sequences have been introduced to construct 16-QAM and 256-QAM (quadrature amplitude modulation) code for the orthogonal frequency division multiplexing (OFDM), reducing the peak-to-average power ratio. In this paper we have considered the use of coding to reduce the peakto- average power ratio (PAPR) for orthogonal frequency division multiplexing (OFDM) systems. By using QPSK Golay seq

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3

Sun, Zeng You, and Fan Ming Zeng. "Optimization and Simulation of OFDM System Based on Orthogonal Wavelet." Applied Mechanics and Materials 548-549 (April 2014): 1221–26. http://dx.doi.org/10.4028/www.scientific.net/amm.548-549.1221.

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In order to reduce the Orthogonal Frequency division Multiplexing (OFDM) Inter-Carrier Interference (ICI), Put forward a kind of modulation method that based on the orthogonal frequency division multiplexing of orthogonal wavelet, Using orthogonal wavelet instead of discrete Fourier transform, optimize the design for OFDM systems, on the premise of without protection interval to reduce the system interference, using MATLAB to simulate the OFDM system, results show that the optimization of the OFDM can reduce the power of the ICI and Inter-symbol Interference (ISI) and improve the comprehensive

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4

Yang, Jieying. "Orthogonal frequency division multiplexing technology based on MATLAB." Applied and Computational Engineering 6, no. 1 (2023): 351–58. http://dx.doi.org/10.54254/2755-2721/6/20230807.

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The subcarriers of an orthogonal frequency division multiplexing (OFDM) system are not identical in the time domain, and their spectra also overlap. As a result, the spectrum is being used effectively. Its effective use of frequency resources and capacity to combat channel fading have made it the de facto technical standard. In wireless communication, numerous pathways in the channel can lead to interference between symbols, known as inter-symbol interference (ISI). This research supplements OFDM systems with some safeguards to eliminate inter-symbol interference. Most traditionally, OFDM symb

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5

Francis, Xavier, Babu S. Hari, A. Rajesh, and Basha SK Jameer. "Low Code Coding Approach for ofdm Systems Coded with the Progressive Transmission." International Journal of Innovative Technology and Exploring Engineering (IJITEE) 9, no. 12 (2020): 185–88. https://doi.org/10.35940/ijitee.L7962.1091220.

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Orthogonal Frequency Division Multiplexing (OFDM) offers several benefits such as flexible wrapping, mail sign interference, reduced complexity and more. The only way to match parallel channels is to have genetic diversity in multipath channels. Various coded of OFDM systems reported using some form of channel coding or pre-coding to improve system performance. The execution of irrational orthogonal frequency division multiplexing (OFDM) on blurred channels is usually better than introducing some coding. Various coding schemes for off-OFDM have been reported in the literature.

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6

Koti, Jayasudha, and Braj Kishore Mishra. "BER Performance Comparison of DCO-OFDM and Convolutional Coded DCO-OFDM in IM/DD Systems." International Journal of Electronics, Communications, and Measurement Engineering 8, no. 2 (2019): 26–39. http://dx.doi.org/10.4018/ijecme.2019070102.

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Optical wireless communication (OWC) is an alternative technology to meet the demands of the exponentially-growing high data rate applications run by broadband users. The implementation of single carrier modulation techniques in OWC is an age old technology, but for the last few years research is focused towards the multicarrier modulation techniques in OWC. In OWC, information is carried using intensity modulation and retrieved using direct detection. To perform intensity modulation, the baseband signal should be a unipolar signal. To obtain a unipolar signal, various techniques such as DC-bi

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7

Yang, Xianzhen, Siyuan Yan, Xiao Li, and Fu Li. "A Unified Spectrum Formulation for OFDM, FBMC, and F-OFDM." Electronics 9, no. 8 (2020): 1285. http://dx.doi.org/10.3390/electronics9081285.

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Although orthogonal frequency division multiplexing (OFDM) has been standardized for 5G, filter bank multi-carrier (FBMC) and filtered orthogonal frequency division multiplexing (F-OFDM) remain competitive as candidates for future generations of wireless technologies beyond 5G, due to their reduced spectrum leakage and thus enhanced spectrum efficiency. In this article, we developed a unified spectrum expression for OFDM, FBMC, and F-OFDM, which provides comparative insights into those techniques. A representative sideband quantification is included at the end of this article.

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8

Chen, Jiamin, Chen Chen, Zhihong Zeng, et al. "Orthogonal Frequency Division Diversity and Multiplexing for 6G OWC: Principle and Underwater Use Case." Photonics 11, no. 11 (2024): 1051. http://dx.doi.org/10.3390/photonics11111051.

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In this paper, we, for the first time, propose and demonstrate an orthogonal frequency division diversity and multiplexing (OFDDM) scheme for the sixth-generation (6G) underwater optical wireless communication (UOWC) systems. In OFDDM, the subcarriers are grouped into subblocks; the subcarriers within each subblock transmit the same constellation symbol through diversity transmission, while different subblocks transmit different constellation symbols via multiplexing transmission. As a result, OFDDM can support hybrid diversity and multiplexing transmission simultaneously. Moreover, the combin

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9

Yan, Hua. "Orthogonal Frequency Division Multiplexing: Status, Challenges and Directions." Applied and Computational Engineering 134, no. 1 (2025): 99–108. https://doi.org/10.54254/2755-2721/2025.20930.

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With the convergence of communication and radar technologies, Integrated Sensing and Communication (ISAC) is expected to be a pivotal focus area for future 6G networks. Orthogonal Frequency Division Multiplexing (OFDM) technology plays a crucial role in enabling ISAC. This paper examines the fundamental principles of OFDM, its applications in terahertz ISAC systems, related advancements such as Orthogonal Time Frequency Space (OTFS), and its potential integration into future air-space-ground networks. While OFDM technology demonstrates significant promise, it also presents several challenges.

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10

Neha, Therkar* Rohit Rathor. "A TECHNICAL REVIEW OF PEAK TO AVERAGE POWER RATIO REDUCTION IN MIMO-OFDM." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 5, no. 9 (2016): 747–51. https://doi.org/10.5281/zenodo.155105.

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In this paper, detailed review of bit error rate (BER) and peak to average power ratio (PAPR) reduction in multiple input multiple output-orthogonal frequency division multiplexing (MIMO-OFDM) and performance analysis of OFDM in various channel is given. This paper will contribute in better choices of technical methods to reduce bit error rate and the peak to average power ratio in orthogonal frequency division multiplexing for high speed wireless communication. One major shortcoming of OFDM is the high peak-to average Power ratio (PAPR). Most investigated techniques modified are Selected Mapp

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11

Praveen Kumar Malik and M P Tripathi. "OFDM: A Mathematical Review." Journal on Today's Ideas - Tomorrow's Technologies 5, no. 2 (2017): 97–111. http://dx.doi.org/10.15415/jotitt.2017.52006.

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Mathematical review of the Orthogonal Frequency Division Multiplexing is demonstrated in terms of Inter symbol interference, Multi carrier modulated system and cyclic prefix. Modeling of the mathematical equation of the Orthogonal Frequency Division Multiplexing, Inverse fast Fourier transform and fast Fourier transform is explained with the suitable example using MATLAB. Bit error rate performance of OFDM is also presented with the help of statistical computation.

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12

Ma, Khin Saw, and Aye Khine Aye. "Comparison of Three Different Cancellation Schemes for Orthogonal Frequency Division Multiplexing OFDM System." International Journal of Trend in Scientific Research and Development 3, no. 4 (2019): 1449–51. https://doi.org/10.5281/zenodo.3591218.

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Orthogonal Frequency Division Multiplexing OFDM is an exceptional case of Frequency Division Multiplexing. The dilemma of OFDM is its sensitivity to frequency offset between the transmitted and received carrier frequencies. This frequency offset establishes Inter Carrier Interference ICI Cancellation in the OFDM symbol. ICI reduction methods have been had by OFDM. This research considers three ICI self cancellation SC , maximum likelihood ML estimation, and extended Kalman filter EKF method. These three methods are compared in terms of bit error rate performance, bandwidth efficiency, and comp

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13

Sahrab, Ammar A., and Alaa Doohee Yaseen. "Filtered orthogonal frequency division multiplexing for improved 5G systems." Bulletin of Electrical Engineering and Informatics 10, no. 4 (2021): 2079–87. http://dx.doi.org/10.11591/eei.v10i4.3119.

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Wireless communications became an integrated part of the human life. Fifth generation (5G) is the modern communication which provides enhanced mobile broadband (eMBB), ultra reliable low latency communications (URLLC), and massive machine type communication (mMTC). Thus, 5G have to provide coverage to multi-numerology devices, therefore, modulation and access schemes are suggested in the literature such as cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) and filtered OFDM (f-OFDM). CP-OFDM suffers from the high out of band emission which limited the multi-numerology applicati

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Ammar, A. Sahrab, and Doohee Yaseen Alaa. "Filtered orthogonal frequency division multiplexing for improved 5G systems." Bulletin of Electrical Engineering and Informatics 10, no. 4 (2021): 2079~2087. https://doi.org/10.5281/zenodo.5234415.

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Wireless communications became an integrated part of the human life. Fifth generation (5G) is the modern communication which provides enhanced mobile broadband (eMBB), ultra reliable low latency communications (URLLC), and massive machine type communication (mMTC). Thus, 5G have to provide coverage to multi-numerology devices, therefore, modulation and access schemes are suggested in the literature such as cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) and filtered OFDM (f-OFDM). CP-OFDM suffers from the high out of band emission which limited the multi-numerology applicati

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15

Yonis, Aws Zuheer, and Khalid Khalil Mohammed. "Investigation of pattern division multiple access technique in wireless communication networks." Indonesian Journal of Electrical Engineering and Computer Science 26, no. 1 (2022): 296–303. https://doi.org/10.11591/ijeecs.v26.i1.pp296-303.

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Recently, pattern division multiple access (PDMA) is a non-orthogonal multiple access system that is now being developed in next-generation telecoms to address the requirement for mass connectivity. The core premise of non-orthogonal multiple access is to simultaneously serve multiple users with varying power levels across the same spectrum resources such as time, frequency, code, as well as space with minimal inter-user interference. A simulation analysis of significant technology enhancements focusing on PDMA aims to describe the benefits of the two plans now being examined by the third-gene

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16

Lowery, Arthur James. "Spectrally efficient optical orthogonal frequency division multiplexing." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 378, no. 2169 (2020): 20190180. http://dx.doi.org/10.1098/rsta.2019.0180.

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This paper charts the development of spectrally efficient forms of optical orthogonal frequency division multiplexing (OFDM) that are suited for intensity-modulated direct detection systems, such as wireless optical communications. The journey begins with systems using a DC-bias to ensure that no parts of the signal that modulates the optical source are negative in value, as negative optical intensity is unphysical. As the DC-part of the optical signal carries no information, it is wasteful in energy; thus asymmetrically clipped optical OFDM was developed, removing any negative-going peaks bel

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17

Li, Chen Wu, Jian Zhang, Qin Xie, and Xiao Hong Zhang. "Carrier Modulation Technology Based on Orthogonal Frequency Division Multiplexing." Advanced Materials Research 774-776 (September 2013): 1671–76. http://dx.doi.org/10.4028/www.scientific.net/amr.774-776.1671.

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This paper first analyzes the transmission characteristics of low-voltage power line channels with the focus on the study of carrier modulation technology regarding the power line communication part, then proposes the orthogonal frequency division multiplexing technology that serves for the digital communication of family network power line communication gateways, analyzes the OFDM system principle, actulizes OFDM modulation and demodulation through discrete Fourier transform (DFT) and inverse discrete Fourier transform (IDFT), and build the OFDM simulation model. Finally, a specific plan of u

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Yonis, Aws Zuheer, and Khalid Khalil Mohammed. "Investigation of pattern division multiple access technique in wireless communication networks." Indonesian Journal of Electrical Engineering and Computer Science 26, no. 1 (2022): 296. http://dx.doi.org/10.11591/ijeecs.v26.i1.pp296-303.

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Recently, <span>pattern division multiple access (PDMA) is a non-orthogonal multiple access system that is now being developed in next-generation telecoms to address the requirement for mass connectivity. The core premise of non-orthogonal multiple access is to simultaneously serve multiple users with varying power levels across the same spectrum resources such as time, frequency, code, as well as space with minimal inter-user interference. A simulation analysis of significant technology enhancements focusing on PDMA aims to describe the benefits of the two plans now being examined by th

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19

Girinath, N. "A Novel Reconfigurable Orthogonal Frequency Division Multiplexing Transceiver." Journal of Computational and Theoretical Nanoscience 16, no. 2 (2019): 430–35. http://dx.doi.org/10.1166/jctn.2019.7745.

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As the world moves toward 3G/4G there is a need for high data rate and relatively wide bandwidths. OFDM (Orthogonal Frequency Division Multiplexing) a form of multicarrier modulation technique is widely used to achieve high speed efficient data transmission at the rate of several Mbps. It is used in Wi-Fi standards like 802.11a, 802.11n, 802.11ac, broadcast standards like Digital Video Broadcast (DVB) and cellular telecommunications standard LTE. The main advantage of OFDM compared to single carrier modulation is their robustness to channel fading in wireless environment, high baud rates and l

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20

Aljanaby, Ashwaq A. Abed, and Malathe Salah AL Deen Salah AL -Deen. "ADAPTIVE CYCLIC PREFIX LENGTH FOR CONVOLUITIONAL CODE OFDM SYSTEM IN FREQUENCY SELECTIVE CHANNEL." Journal of Engineering 18, no. 1 (2023): 51–63. http://dx.doi.org/10.31026/j.eng.2012.01.04.

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Orthogonal Frequency Division Multiplexing (OFDM) is one of recent years multicarrier modulation used in order to combat the Inter Symbol Interference (ISI) introduced by frequency selective mobile radio channel. The circular extension of the data symbol, commonly referred to as cyclic prefix is one of the key elements in an OFDM transmission scheme. This paper study The influence of the cyclic prefix duration on the BER performance of an OFDM-VCPL (Orthogonal frequency division multiplexing - Variable Cyclic Prefix Length) system and the conventional OFDM system with frame 64-QAM modulation i

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21

Sun, Enchang, Kechu Yi, Bin Tian, and Dongying Zhang. "Quasi-Orthogonal Time Division Multiplexing and Its Performances in Rayleigh Fading Channels." ISRN Communications and Networking 2012 (March 27, 2012): 1–5. http://dx.doi.org/10.5402/2012/295424.

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This paper proposes an efficient transmission scheme, Quasi-Orthogonal Time Division Multiplexing (QOTDM), which employs the shift orthogonal property of the pulse function with raised-cosine spectral shape, and the signal waveforms are quasi-orthogonal in time domain. Comparing to orthogonal frequency division multiplexing (OFDM), QOTDM is less sensitive to carrier frequency offset and power amplifier nonlinearities while keeping a similar spectral efficiency with OFDM due to single-carrier characteristics. QOTDM is a suitable consideration for the downlink transmission such as in satellite c

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Xin, Yu, Tong Bao, Jian Hua, and Hongming Zhang. "Generalized Filter Bank Orthogonal Frequency Division Multiplexing Systems for 6G." Electronics 13, no. 15 (2024): 3006. http://dx.doi.org/10.3390/electronics13153006.

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In this study, generalized filter bank orthogonal frequency division multiplexing (GFB-OFDM) is proposed for 6G. In order to meet the different requirements of various scenarios in 6G, a unified structure of GFB-OFDM is designed by adopting the flexible capabilities of suitable transmission modules. In the proposed GFB-OFDM system, the coexistence of different numerologies in different sub-bands and/or the coexistence of single-carrier and multi-carrier waveforms are achieved for adjusting different scenarios in 6G. Finally, simulation results are provided to validate the BER performance of GF

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Fan, Tong Liang, and Lian Qing Fu. "Channel Estimation for OFDM System with Regularized Total Least-Squares Solution." Key Engineering Materials 467-469 (February 2011): 1621–26. http://dx.doi.org/10.4028/www.scientific.net/kem.467-469.1621.

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Orthogonal frequency-division multiplexing (OFDM) combines the advantages of high performance and relatively low implementation complexity. However, for reliable coherent detection of the input signal, the OFDM receiver needs accurate channel information. The Doppler shift of fast-fading channels will generate inter-carrier interference (ICI) and, hence, degrade the performance of orthogonal frequency-division multiplexing (OFDM) systems. In this paper, we present regularized total least-squares (RTLS) scheme to eliminate the ICI and noise. A closed-form mathematical expression has been derive

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Solyman, Ahmad AA, Hani Attar, Mohammad R. Khosravi, and Baki Koyuncu. "MIMO-OFDM/OCDM low-complexity equalization under a doubly dispersive channel in wireless sensor networks." International Journal of Distributed Sensor Networks 16, no. 6 (2020): 155014772091295. http://dx.doi.org/10.1177/1550147720912950.

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In this article, three novel systems for wireless sensor networks based on Alamouti decoding were investigated and then compared, which are Alamouti space–time block coding multiple-input single-output/multiple-input multiple-output multicarrier modulation (MCM) system, extended orthogonal space–time block coding multiple-input single-output MCM system, and multiple-input multiple-output system. Moreover, the proposed work is applied over multiple-input multiple-output systems rather than the conventional single-antenna orthogonal chirp division multiplexing systems, based on the discrete frac

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Mahender, Kommabatla, Tipparti Anil Kumar, and K. S Ramesh. "PAPR Analysis of Fifth Generation Multiple Access Waveforms for Advanced Wireless Communication." International Journal of Engineering & Technology 7, no. 3.34 (2018): 487. http://dx.doi.org/10.14419/ijet.v7i3.34.19364.

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This paper describes the aspects of multiple access for emerging (5G) Wireless Communication Systems. Orthogonal Frequency Division Multiplexing (OFDM) is best suited for fourth generation (4G) but it suffers from the problem of high Peak to Average Power Ratio (PAPR) & Side band leakage. Single carrier frequency division multiple access (SC-FDMA) has worked like an alternative to OFDMA only in the uplink process and PAPR was reduced. OFDM based 4G network is not capable of supporting diverse applications and these applications can be implemented by 5G. High traffic requirements of 5G can

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Xin, Yu, Jian Hua, Tong Bao, et al. "Generalized Filter Bank Orthogonal Frequency Division Multiplexing: Low-Complexity Waveform for Ultra-Wide Bandwidth and Flexible Services." Entropy 26, no. 11 (2024): 994. http://dx.doi.org/10.3390/e26110994.

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Terahertz (THz) communication is a crucial technique in sixth generation (6G) mobile networks, which allow for ultra-wide bandwidths to enable ultra-high data rate wireless communication. However, the current subcarrier spacing and the size of fast Fourier transform (FFT) of the orthogonal frequency division multiplexing (OFDM) in 5G NR are insufficient regarding the bandwidth requirements of terahertz scenarios. In this paper, a novel waveform is proposed to address the ultra-wideband issue, namely the generalized filter bank orthogonal frequency division multiplexing (GFB-OFDM) waveform. The

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Al-Asady, Heba Abdul-Jaleel, Hassan Falah Fakhruldeen, and Mustafa Qahtan Alsudani. "Channel estimation of OFDM in C-band communication systems under different distribution conditions." Indonesian Journal of Electrical Engineering and Computer Science 23, no. 3 (2021): 1778–82. https://doi.org/10.11591/ijeecs.v23.i3.pp1778-1782.

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Orthogonal frequency division multiplexing (OFDM) is a transmission system that uses multiple orthogonal carriers that are sent out at the same time. OFDM is a technique for mobile and wireless communication that has high-efficient frequency utilization, high data-rate transmission, simple and efficient implementation using the fast Fourier transform (FFT) and the inverse fast Fourier transform (IFFT), and reduces inter symbol interference (ISI) by inserting cyclic prefix (CP). One of the most important approaches in an OFDM system is channel estimation. In this paper, the orthogonal frequency

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Ahmed, Abu Shakil, Husam Al-amaireh, and Zsolt Kollar. "Multicarrier Modulation Schemes for 5G Wireless Access." ECTI Transactions on Computer and Information Technology (ECTI-CIT) 16, no. 4 (2022): 378–92. http://dx.doi.org/10.37936/ecti-cit.2022164.248710.

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The 5G wireless access technology will supersede its predecessor, 4G, in the current decade, at first coexisting with it and later as a standalone technology. This work examines and compares the performance of the following orthogonal multicarrier schemes: Cyclic Prefix Orthogonal Frequency Division Multiplexing (CP-OFDM), Windowed Orthogonal Frequency Division Multiplexing (W-OFDM), Filtered Orthogonal Frequency Division Multiplexing (F-OFDM), Universal Filtered Multi-Carrier (UFMC), and Filter Bank Multi-Carrier (FBMC). The system architecture of each scheme is investigated while considering

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Ding, Qingan, Li Zheng, Huixin Liu, et al. "Design and Performance Analysis of Hybrid Multidimensional OAM-DM-WDM-OFDM-PON System with High-Capacity and Long-Distance Transmission." Photonics 9, no. 7 (2022): 448. http://dx.doi.org/10.3390/photonics9070448.

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Orbital angular momentum (OAM) with mutually orthogonal advantage attribute to break through the high capacity and long-reach transmission limited in the classical passive optical network (PON). Employing Laguerre Gaussian (LG) mode as the orthogonal OAM excitation, a more dimensional multiplexing PON system is proposed to creatively hybridize OAM division multiplexing (OAM-DM) based on wavelength division multiplexing (WDM) and orthogonal frequency division multiplexing (OFDM). By utilizing the compatibility of OAM-DM and WDM, data of 40 Gbit/s OFDM signals is successfully transmitted in 80 k

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Qasim, Aseel. "Efficient Multi-Carrier Communication Systems: A Performance Evaluation of Parallel and Sequential Data Processing Models." Journal of Internet Services and Information Security 15, no. 1 (2025): 67–78. https://doi.org/10.58346/jisis.2025.i1.005.

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Orthogonal frequency division multiplexing (OFDM) is a popular method for multi-carrier transmission today. Nonetheless, one disadvantage of OFDM is its large peak-to-average power ratio (PAPR) which decreases the efficiency of power amplifiers. Orthogonal Wavelet Division Multiplexing (OWDM) offers an alternative to Orthogonal Frequency Division Multiplexing (OFDM). While OFDM utilizes the Inverse Fast Fourier Transform (IFFT), OWDM employs the Inverse Discrete Wavelet Transform (IDWT). Previous studies have shown that the Bit Error Rate (BER) for both OWDM and OFDM is nearly identical; howev

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Soni, G. "Performance Evaluation of OFDM Based Link Using LabVIEW 2012." Information Technologies and Control 14, no. 4 (2016): 33–38. http://dx.doi.org/10.1515/itc-2017-0015.

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Abstract Background: Orthogonal Frequency Division Multiplexing (OFDM) has emerged as the core technology of the 4th generation mobile communication due to its capacity to combat channel fading also OFDM is highly spectral efficient. Methods/Statistical Analysis: LabVIEW 2012 is used to simulate and evaluate the performance of OFDM link. Bit Error Rate (BER) evaluation of discrete Fourier transform (DFT) based OFDM system is carried out in this work. The simulation based analysis is demonstrated by means of different modulation schemes like QPSK, 16-QAM for OFDM based wireless system. Findings

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Reddy, D. Yamini, K. Hari Hruthvik, M. Harsha Vardhan Reddy, and Pendli Pradeep. "Reduction of PAPR and improved BER using SLM technique." International Journal for Research in Applied Science and Engineering Technology 10, no. 6 (2022): 852–57. http://dx.doi.org/10.22214/ijraset.2022.43887.

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Abstract: With the introduction of 5G wireless technology, mankind has achieved a massive leap in data throughput of gigabits per second thanks to the combination of multiple input, multiple output, and orthogonal frequency division multiplexing technologies. Multiple (OFDM MIMO) can be achieved via frequency selective fading. PAPR (Peak-to-Average Power Ratio) is one of the most crucial performance concerns, since it makes OFDM particularly prone to harmonic distortion, reducing channel estimate accuracy and resulting in a lower bit error rate (BER). In the MIMO-OFDM system, we present a sele

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Al-Asady, Heba Abdul-Jaleel, Hassan Falah Fakhruldeen, and Mustafa Qahtan Alsudani. "Channel estimation of OFDM in C-band communication systems under different distribution conditions." Indonesian Journal of Electrical Engineering and Computer Science 23, no. 3 (2021): 1778. http://dx.doi.org/10.11591/ijeecs.v23.i3.pp1778-1782.

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<p>Orthogonal frequency division multiplexing (OFDM) is a transmission system that uses multiple orthogonal carriers that are sent out at the same time. OFDM is a technique for mobile and wireless communication that has high-efficient frequency utilization, high data-rate transmission, simple and efficient implementation using the fast Fourier transform (FFT) and the inverse fast Fourier transform (IFFT), and reduces inter symbol interference (ISI) by inserting cyclic prefix (CP). One of the most important approaches in an OFDM system is channel estimation. In this paper, the orthogonal

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Kumar, Abhishek. "ON VARIOUS TECHNIQUES IN OFDM AND GFDM: A SURVEY." International Journal of Students' Research in Technology & Management 5, no. 4 (2017): 39–45. http://dx.doi.org/10.18510/ijsrtm.2017.545.

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Orthogonal Frequency Division Multiplexing (OFDM) is a multi-carrier modulation that divides the available spectrum into a finite number of carriers and applied into a digital transmission system. But it has some drawbacks such as sensitivity in inter-carrier interference, high peak to average power ratio and insufficient cyclic prefix in spectrum. These drawbacks may be reduced by a technique known as Generalized Frequency Division Multiplexing (GFDM). In the present scenario, it is a high speed multi-carrier multiplexing data transfer scheme for the cellular network. This paper deals with a

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Wirastuti, N. M. A. E. Dewi, I. G. A. K. Diafari Djuni Hartawan, I. Made Arsa Suyadnya, and Duman Care Khrisne. "Carrier Frequency Offset Effects on OFDM System over Rayleigh Fading Channel." Journal of Electrical, Electronics and Informatics 3, no. 2 (2020): 45. http://dx.doi.org/10.24843/jeei.2019.v03.i02.p03.

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Orthogonal Frequency Division Multiplexing (OFDM) system showed the use of Discrete Fourier Transform (DFT) and Inverse Discrete Fourier Transform (IDFT) to perform the baseband modulation and demodulation. So that, it can increase and improve the efficiency of the modulation and demodulation. Currently, the OFDM is being utilized in the field of broadband wireless communication, which transmit signals orthogonally, that increases speed of information transmission. It also has high proficiency with high bandwidth and provide large data rates and robust against the multipath delay spread. On th

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Amertet, Sairoel. "F-OFDM in a novel form for analyzing 5G networks." Journal of Information Technology and Computing 3, no. 1 (2022): 1–16. http://dx.doi.org/10.48185/jitc.v3i1.489.

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The need for internet of things (IoT) and machine-to-machine communication (MTC) has been growing rapidly all across the world. To meet the client's needs, many literature reviews were undertaken in several countries. Orthogonal frequency division multiplexing (OFDM), Universal Filtered Multi-Carrier (UFMC), filter-bank multicarrier offset construction amplitude modulation (FBMC-OQAM), generalized frequency division multiplexing (GFDM), and others are candidates for LTE, LTE advance, and 5G, according to the majority of the researchers. However, because it is sensitive to propagation and noise

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L. N. Balai, Girraj Kumar Jangid, Ashish Kumar Sharma,. "Investigations on PAPR and SER Performance Analysis of OFDMA and SCFDMA under Different Channels." International Journal on Recent Technologies in Mechanical and Electrical Engineering 9, no. 5 (2022): 28–35. http://dx.doi.org/10.17762/ijrmee.v9i5.371.

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Code Division Multiple Access (CDMA) and Orthogonal Frequency Division Multiplexing are two multicarrier regulatory systems that have improved due to the growing demand in quick communication (OFDM). A frequency division multiplexing (FDM) plot called orthogonal frequency division multiplexing is utilized as a sophisticated multi carrier regulation approach. Due to its excellent spectrum efficiency and low data rate, the single carrier multiple access system (SC-FDMA) is a unique radio transmission technique that is now employed in long-term evolution (LTE) technology for uplink. When co

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L. N. Balai, Girraj Kumar Jangid, Ashish Kumar Sharma,. "Investigations on PAPR and SER Performance Analysis of OFDMA and SCFDMA under Different Channels." International Journal on Recent Technologies in Mechanical and Electrical Engineering 9, no. 3 (2022): 28–35. http://dx.doi.org/10.17762/ijrmee.v9i3.371.

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Code Division Multiple Access (CDMA) and Orthogonal Frequency Division Multiplexing are two multicarrier regulatory systems that have improved due to the growing demand in quick communication (OFDM). A frequency division multiplexing (FDM) plot called orthogonal frequency division multiplexing is utilized as a sophisticated multi carrier regulation approach. Due to its excellent spectrum efficiency and low data rate, the single carrier multiple access system (SC-FDMA) is a unique radio transmission technique that is now employed in long-term evolution (LTE) technology for uplink. When co

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Lian, Jie, Yan Gao, Peng Wu, and Dianbin Lian. "Orthogonal Frequency Division Multiplexing Techniques Comparison for Underwater Optical Wireless Communication Systems." Sensors 19, no. 1 (2019): 160. http://dx.doi.org/10.3390/s19010160.

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Optical wireless communication is an energy-efficient and cost-effective solution for high-speed and highly-secure wireless connections. In this paper, we compare, discuss, and analyze three popular optical orthogonal frequency division multiplexing (OFDM) techniques, such as DC-biased optical OFDM (DCO-OFDM), asymmetrically-clipped optical OFDM (ACO-OFDM), and unipolar OFDM (U-OFDM), for underwater optical wireless communication systems. The peak power constraint, bandwidth limit of the light source, turbulence fading underwater channel, and the channel estimation error are taken into account

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Chen, Lu, Jianxiong Pan, Jing Zhang, Junfeng Cheng, Luyan Xu, and Neng Ye. "FDSS-Based DFT-s-OFDM for 6G Wireless Sensing." Sensors 23, no. 3 (2023): 1495. http://dx.doi.org/10.3390/s23031495.

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Integrated sensing and communications (ISAC) is emerging as a key technology of 6G. Owing to the low peak-to-average power ratio (PAPR) property, discrete Fourier transform spread orthogonal frequency-division multiplexing (DFT-s-OFDM) is helpful to improve the sensing range and suitable for high-frequency transmission. However, compared to orthogonal frequency-division multiplexing (OFDM), the sensing accuracy of DFT-s-OFDM is relatively poor. In this paper, frequency-domain spectral shaping (FDSS) is adopted to enhance the performances of DFT-s-OFDM including sensing accuracy and PAPR by adj

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Ahmed, Abdullah Furqaan. "Channel Estimation on MIMO F-OFDM Using Deep Learning Algorithm." International Journal for Research in Applied Science and Engineering Technology 13, no. 1 (2025): 581–83. https://doi.org/10.22214/ijraset.2025.66312.

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This paper outlines the Analysis of techniques for estimating channels in MIMO-OFDM systems, which combine Multiple Input Multiple Output (MIMO) with Orthogonal Frequency Division Multiplexing(OFDM)to enhance spectral efficiency and robustness in modern telecommunication systems

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Yadav, Sarita, Ashish Nema, and Jitendra Mishra. "Space Time Trellis Code Frequency Index Modulation with Neuro-LS Channel Estimation in OFDM." SMART MOVES JOURNAL IJOSCIENCE 5, no. 9 (2019): 7. http://dx.doi.org/10.24113/ijoscience.v5i9.226.

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In wireless communication, orthogonal frequency division multiplexing (OFDM) plays a major role because of its high transmission rate. In space-time shift keying (STSK), the information is conveyed by both the spatial and time dimensions, which can be used to strike a trade-off between the diversity and multiplexing gains. On the other hand, orthogonal frequency division multiplexing (OFDM) relying on index modulation (IM) conveys information not only by the conventional signal constellations as in classical OFDM, but also by the indices of the subcarriers. In this paper compressed sensing(CS)

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Guo, Kai, Yun Jia Zhang, Dan Luo, and Zhuo Liu. "High Capacity and Power Efficient PON Combining ACO-OFDM and WDM Technologies." Advanced Materials Research 909 (March 2014): 260–64. http://dx.doi.org/10.4028/www.scientific.net/amr.909.260.

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An upstream transmission scheme of asymmetric clipping optical orthogonal frequency division multiplexing (ACO-OFDM) based WDMA-PON is proposed. Performance of 10Gbit/s/ONU upstream ACO-OFDM signal is analyzed. The scheme is high capacity and power efficient.

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R, Shivaji, R. Nataraj K, Mallikarjunaswamy S, and R. Rekha K. "Design and implementation of reconfigurable DCT based adaptive PST techniques in OFDM communication system using interleaver encoder." Indian Journal of Science and Technology 13, no. 29 (2020): 3008–20. https://doi.org/10.17485/IJST/v13i29.976.

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Abstract <strong>Objectives:</strong> To propose Reconfigurable Discrete Cosine Transform (RDCT) in Orthogonal Frequency Division Multiplexing (OFDM) high speed communication system to improve efficient spectrum utilization and mitigation of jitter,selective fading effects. The adaptive PTS method reduces Inter-Carrier-Interference (ICI), Inter-Symbol-Interference (ISI), PAPR and the computational intricacy of the communication system. To analyse and compare the performance of proposed Reconfigurable method with existing conventional OFDM communication system. <strong>Methods:</stron

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Kahlert, Moritz, Tai Fei, Yuming Wang, Claas Tebruegge, and Markus Gardill. "Unified Model and Survey on Modulation Schemes for Next-Generation Automotive Radar Systems." Remote Sensing 17, no. 8 (2025): 1355. https://doi.org/10.3390/rs17081355.

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Commercial automotive radar systems for advanced driver assistance systems (ADASs) have relied on frequency-modulated continuous wave (FMCW) waveforms for years due to their low-cost hardware, simple signal processing, and established academic and industrial expertise. However, FMCW systems face several challenges, including limited unambiguous velocity, restricted multiplexing of transmit signals, and susceptibility to interference. This work introduces a unified automotive radar signal model and reviews the alternative modulation schemes such as phase-coded frequency-modulated continuous wav

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Sheriff, Alimi, D. Alao Olujimi, and A. Mumuni Quadri. "An overview of orthogonal frequency division multiplexing principles, architecture, and its application." Global Journal of Engineering and Technology Advances 12, no. 1 (2022): 120–30. https://doi.org/10.5281/zenodo.6962373.

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In this work, Orthogonal Frequency Division Multiplexing’s (OFDM) principles, implementation design or high-level system architecture and application were reviewed. The condition for orthogonality, frequency spacing between consecutive subcarriers (called frequency spacing) was established analytically with practical instance highlighted. The review also covers Fast Fourier Transform (FFT) which serves as a bank of demodulators while Inverse Fast Fourier Transform (IFFT) serves as a bank of modulators in an OFDM system, advancement in OFDM, Quadrature modulation types (Binary Phase Shift

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Li, Tong Qiang, and Li Gang Xu. "Study and Simulation Analysis of OFDM System Based on Simulink." Advanced Materials Research 706-708 (June 2013): 1967–70. http://dx.doi.org/10.4028/www.scientific.net/amr.706-708.1967.

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Orthogonal Frequency Division Multiplexing(OFDM) is going to become the most important technique in the future communication system. The paper presents the principle of OFDM,establishes a simulation model of OFDM communication system based on simulink.By utilizing the system,we briefly analyse the simulation results and conclude the the performance characteristics of OFDM system.

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Tang, Tao, Yulong Mao, and Guangmin Hu. "A Fair Power Allocation Approach to OFDM-Based NOMA with Consideration of Clipping." Electronics 9, no. 10 (2020): 1743. http://dx.doi.org/10.3390/electronics9101743.

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Orthogonal frequency division multiplexing-based non-orthogonal multiple access (OFDM-NOMA) is a competitive solution to achieve a capacity gain over orthogonal frequency division multiplexing-based orthogonal multiple access (OFDM-OMA). However, a major drawback of OFDM-based systems is the high peak-to-average power ratio (PAPR). Clipping is widely used for PAPR reduction, but it will degrade the capacity performance. Motivated by this fact, a fair user signal power allocation approach to OFDM-NOMA with clipping is proposed, where the power allocation factor is selected from a fair region. T

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Moreira, Túlio Fernandes, Ândrei Camponogara, Sobia Baig, and Moisés Vidal Ribeiro. "Performance Analysis of Orthogonal Multiplexing Techniques for PLC Systems with Low Cyclic Prefix Length and Symbol Timing Offset." Sensors 23, no. 9 (2023): 4363. http://dx.doi.org/10.3390/s23094363.

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This paper investigates the degradation caused by interference resulting from cyclic prefix violation and symbol timing offset in narrowband power line communication systems. In this sense, it presents a unified formulation from which Hermitian symmetric orthogonal frequency division multiplexing (HS-OFDM), orthogonal chirp division multiplexing (OCDM), single-carrier cyclic prefix (SCCP), and orthogonal time–frequency division multiplexing (OTFDM) can be easily derived. The paper then provides closed-form expressions for quantifying the aforementioned interference in the presence of a frequen

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Gunawan, Wahyu-Hendra, Yang Liu, Chi-Wai Chow, Yun-Han Chang, and Chien-Hung Yeh. "High Speed Visible Light Communication Using Digital Power Domain Multiplexing of Orthogonal Frequency Division Multiplexed (OFDM) Signals." Photonics 8, no. 11 (2021): 500. http://dx.doi.org/10.3390/photonics8110500.

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In order to increase transmission capacity, multiplexing schemes in different physical dimensions, including time, frequency, modulation quadrature, polarization, and space, can be employed. In this work, we propose and demonstrate a red color laser-diode (LD) based visible-light-communication (VLC) system using two kinds of digital domain multiplexing schemes, orthogonal-frequency-division-multiplexing (OFDM) and power-domain division-multiplexing (PowDM). The two digital domain multiplexed data can achieve data rates of 1.66 Gbit/s and 6.41 Gbit/s, respectively, providing a total data rate o

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