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Journal articles on the topic 'MIMO-OFDM System'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Prayitno, R. A., N. M. A. E. D. Wirastuti, and I. G. A. K. D. D. Hartawan. "ANALISIS UNJUK KERJA ZERO FORCING EQUALIZER PADA SISTEM OFDM MIMO." Jurnal SPEKTRUM 5, no. 1 (2018): 68. http://dx.doi.org/10.24843/spektrum.2018.v05.i01.p10.

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Wireless network is one of the most important things in the development of telecommunication. However, the existing wireless technology has not been able to efficiently create a very high data rate because it was very sensitive to fading. Therefore, Orthogonal Frequency Division Multiplexing (OFDM) technology combined with MIMO (Multiple Input Multiple Output) transceiver system was used to gain more diversity and bandwidth efficiency. The propagation performed on the OFDM MIMO system was multipath propagation. To reduce Intersymbol Interference (ISI) was used Zero Forcing (ZF) equalizer which

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2

Devarsh, Patel*. "BER ANALYSIS OF MIMO-OFDM SYSTEM." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 5, no. 12 (2016): 605–12. https://doi.org/10.5281/zenodo.205862.

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MIMO is a system where a number of antennas are used at the transmitter and receiver side. A MIMO system takes advantage of the spatial diversity that is obtained by spatially separated antennas in a dense multipath scattering environment. The combination of OFDM systems with MIMO technology has provided us with increase in link reliability and an improvement in spectral efficiency. For 4G communication MIMO-OFDM is one of the most competitive technologies. The combination of OFDM and MIMO seems to be very promising when aiming at the design of very high-rate wireless mobile systems. This pape

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Muoghalu, C. N., P. N. Achebe, and F. A. Aigbodioh. "MIMO-OFDM Techniques for Wireless Communication System: Performance Evaluation Review." International Journal of Advanced Networking and Applications 14, no. 04 (2023): 5572–81. http://dx.doi.org/10.35444/ijana.2023.14410.

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The use of multiple antennas in wireless communication systems has resulted in multiple channels that facilitate the speed of data transfer and improved channel capacity. This technique that basically involves multiple input and multiple output (MIMO) antennas helps to improve system performance by reducing bit error rate (BER) while increasing signal to noise ratio (SNR). Also, the use of orthogonal frequency division multiplexing (OFDM) has helped in mitigating inter-symbol interference (ISI). A combination of MIMO and OFDM produces the MIMO-OFDM scheme. This paper reviewed the performance o

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Manzoor, Shahid, Noor Shamsiah Othman, and Mohammed W. Muhieldeen. "Preamble-Based Signal-to-Noise Ratio Estimation for Adaptive Modulation in Space–Time Block Coding-Assisted Multiple-Input Multiple-Output Orthogonal Frequency Division Multiplexing System." Algorithms 18, no. 2 (2025): 97. https://doi.org/10.3390/a18020097.

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This paper presents algorithms to estimate the signal-to-noise ratio (SNR) in the time domain and frequency domain that employ a modified Constant Amplitude Zero Autocorrelation (CAZAC) synchronization preamble, denoted as CAZAC-TD and CAZAC-FD SNR estimators, respectively. These SNR estimators are invoked in a space–time block coding (STBC)-assisted multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) system. These SNR estimators are compared to the benchmark frequency domain preamble-based SNR estimator referred to as the Milan-FD SNR estimator when used in

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Wang, Ya Jing, Ya Zhen Li, and Li Qun Huang. "An Improved Algorithm Based on Optimized PTS in MIMO-OFDM System." Advanced Materials Research 765-767 (September 2013): 2801–4. http://dx.doi.org/10.4028/www.scientific.net/amr.765-767.2801.

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The fourth generation mobile communication system is a high-speed broadband wireless communication system, it needs MIMO and OFDM technology which have high spectral efficiency and suitable for a multi-path fading channel. Because the MIMO-OFDM system is still an multi-carrier modulation system, the main drawback is the high PAPR value. This paper proposed an improved algorithm based on optimized PTS to reduce PAPR in STBC MIMO-OFDM system. The simulation results show that the improved algorithm can effectively reduce the PAPR value and do not increase the amount of computation in STBC MIMO-OF

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Wang, Ya Jing, Ya Zhen Li, and Jing Guan. "A New Algorithm to Reduce PAPR in STBC MIMO-OFDM System." Advanced Materials Research 760-762 (September 2013): 190–93. http://dx.doi.org/10.4028/www.scientific.net/amr.760-762.190.

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MIMO and OFDM technology is the core technology of 4G network, and have great development prospects. The main drawback of MIMO-OFDM system is the high PAPR. This paper is based on Cross-antenna rotation and inversion and Active Constellation Extension. The paper proposed the joint algorithm to reduce PAPR in STBC MIMO-OFDM system. It makes use of time, space and frequency freedom to improve the PAPR performance. The simulation results show that the joint algorithm can effectively reduce the PAPR value and do not increase the bit error rate in STBC MIMO-OFDM system.

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Yadav, Brijesh Kumar, and Rabindra Kumar Singh. "Performance Analysis of Efficient and Low Complexity MIMO-OFDM System Using Modified V-BLAST." International Journal of Sensors, Wireless Communications and Control 10, no. 3 (2020): 302–7. http://dx.doi.org/10.2174/2210327909666190409143110.

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Background and Objective: To analyze the performance of MIMO-OFDM system, VBLAST detection suffers from computational complexity as well as high BER. Methods: To improve the BER performance and to reduce the computational complexity of receiver, we propose a modified VBLAST detection in MIMO-OFDM Systems. Results: Simulation using MATLAB shows the improvement in computational complexity and in BER. Conclusion: This modified VBLAST reduces the complexity of MIMO-OFDM System to 44.2% and improvement in BER as compared to conventional VBLAST based MIMO-OFDM System.

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Youssef, M. I., A. E. Emam, and Khalifa M. Abd. "ICI and PAPR enhancement in MIMO-OFDM system using RNS coding." International Journal of Electrical and Computer Engineering (IJECE) 9, no. 2 (2019): 1209–19. https://doi.org/10.11591/ijece.v9i2.pp1209-1219.

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The Inter-Carrier-Interference (ICI) is considered a bottleneck in the utilization of Multiple-Input-Multiple-Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) systems, due to the sensitivity of the OFDM towards frequency offsets which lead to loss of orthogonality, interference and performance degradation. In this paper Residue Numbers as a coding scheme is impeded in MIMO-OFDM systems, where the ICI levels is measured and evaluated with respect to conventional ICI mitigation techniques implemented in MIMO-OFDM. The Carrier-to-Interference Ratio (CIR), the system Bit-Error-Rate (B

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Hussein, A. Leftah, and N. Alminshid Huda. "Channel capacity and performance evaluation of precoded MIMO-OFDM system with large-size constellation." International Journal of Electrical and Computer Engineering (IJECE) 9, no. 6 (2019): 5024–30. https://doi.org/10.11591/ijece.v9i6.pp5024-5030.

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Multiple input-multiple output (MIMO) is a multipath diversity exploring approach which is emerged with orthogonal frequency division multiplexing (OFDM) to produce MIMO-OFDM that is widely used in wireless communications. This paper presents a discrete Hartley transform (DHT) precoded MIMO-OFDM system over multipath frequency-selective fading channel with large-size quadrature amplitude modulation (16-QAM, 64-QAM and 256-QAM). A mathematical models for the BER and channel capacity over mutlipath fading channels are also derived in this paper. Average Bit-error-rate (BER) and channel capacity

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Leftah, Hussein A., and Huda N. Alminshid. "Channel capacity and performance evaluation of precoded MIMO-OFDM system with large-size constellation." International Journal of Electrical and Computer Engineering (IJECE) 9, no. 6 (2019): 5024. http://dx.doi.org/10.11591/ijece.v9i6.pp5024-5030.

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<p>Multiple input-multiple output (MIMO) is a multipath diversity exploring approach which is emerged with orthogonal frequency division multiplexing (OFDM) to produce MIMO-OFDM that is widely used in wireless communications. This paper presents a discrete Hart-ley transform (DHT) precoded MIMO-OFDM system over multipath frequency-selective fading channel with large-size quadrature amplitude modulation (16-QAM, 64-QAM and 256-QAM). A mathematical models for the BER and channel capacity over mutlipath fading channels are also derived in this paper. Average Bit-error-rate (BER) and channel

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Youssef, M. I., A. E. Emam, and M. Abd Khalifa. "ICI and PAPR enhancement in MIMO-OFDM system using RNS coding." International Journal of Electrical and Computer Engineering (IJECE) 9, no. 2 (2019): 1209. http://dx.doi.org/10.11591/ijece.v9i2.pp1209-1219.

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<p><span>The Inter-Carrier-Interference (ICI) is considered a bottleneck in the utilization of Multiple-Input-Multiple-Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) systems, due to the sensitivity of the OFDM towards frequency offsets which lead to loss of orthogonality, interference and performance degradation. In this paper Residue Numbers as a coding scheme is impeded in MIMO-OFDM systems, where the ICI levels is measured and evaluated with respect to conventional ICI mitigation techniques implemented in MIMO-OFDM. The Carrier-to-Interference Ratio (CIR), the sys

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Badawi, Waleed K., Marwa G. El-Hossary, and Moustafa H. Aly. "Indoor Wavelet OFDM VLC-MIMO System: Performance Evaluation." Symmetry 13, no. 2 (2021): 270. http://dx.doi.org/10.3390/sym13020270.

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Both light emitting diode (LED) characteristics for illumination and communication simultaneously have made visible light communication-orthogonal frequency division multiplexing (VLC-OFDM) a strong competitive to radio frequency (RF). In this juncture, to improve signal to noise ratio (SNR) and coverage contour, the wavelet-OFDM is suggested for indoor VLC systems. In this paper, a wavelet VLC-OFDM is proposed for imaging multiple-input multiple-output (MIMO) systems. The proposed wavelet-OFDM is exploited for a hybrid space-frequency domain pre-equalization technique instead of the tradition

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Eneh, T., P. Rapajic, K. Anang, and Bello Lawal. "Adaptive MMSE Multiuser Detection in MIMO OFDM Wireless Communication System." Advanced Materials Research 367 (October 2011): 233–40. http://dx.doi.org/10.4028/www.scientific.net/amr.367.233.

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The combination of MIMO signal processing with OFDM is a solution to achieving high data rates for next generation wireless communication systems operating in frequency selective fading environments. To realize the extension of the MIMO with OFDM, a number of changes are required in the baseband signal processing. The developed adaptive Multiuser Detection in MIMO OFDM(AMUD) scheme performs better compared to non adaptive MIMO OFDM, at low Signal to noise ratio (SNR), it shows good performance in computational complexity, bit error rate (BER) and capacity. Simulation results show that the deve

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El Ghzaoui, M., A. Hmamou, J. Foshi, and J. Mestoui. "Compensation of Non-linear Distortion Effects in MIMO-OFDM Systems Using Constant Envelope OFDM for 5G Applications." Journal of Circuits, Systems and Computers 29, no. 16 (2020): 2050257. http://dx.doi.org/10.1142/s0218126620502576.

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Orthogonal frequency division multiplexing (OFDM) is a multicarrier transmission system that can achieve high data rate over wireless channels. At the same time, multiple input multiple output OFDM (MIMO-OFDM) in wireless communication systems has been exposed to offer significant improvement over wireless technology by providing transmit diversity. It has become a promising technique for high-performance 5G broadband wireless communications. However, the main problem associated with MIMO-OFDM is that its signal exhibits high peak-to-average power ratio (PAPR), which causes nonlinear distortio

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Kumari, P. Aruna, Srinu Pyla, U. N. V. P. Rajendranath, and Nirujogi Venkata Maheswara Rao. "Performance analysis of LDPC codes in MIMO-OFDM for next generation wireless systems." International Journal of Informatics and Communication Technology (IJ-ICT) 14, no. 2 (2025): 636. https://doi.org/10.11591/ijict.v14i2.pp636-644.

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Fifth Generation communication systems overcome the limitations of the fourth-generation systems and ensure improved data rates, lower latency, and higher connection density. 5G technology has the potential to unlock new internet of things (IoT) applications by utilizing the technologies such as multiple input multiple output orthogonal frequency division multiplexing (MIMO-OFDM), and Li-Fi. Low density parity check (LDPC) and polar codes are being preferred for data and control channels respectively in 5G systems as these coding techniques offer good error-detection and correction along with

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Hudhajanto, Rizky Pratama, I. Gede Puja Astawa, and Amang Sudarsono. "Covert Communication in MIMO-OFDM System Using Pseudo Random Location of Fake Subcarriers." EMITTER International Journal of Engineering Technology 4, no. 1 (2016): 150–63. http://dx.doi.org/10.24003/emitter.v4i1.58.

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Multiple-Input Multiple-Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) is the most used wireless transmission scheme in the world. However, its security is the interesting problem to discuss if we want to use this scheme to transmit a sensitive data, such as in the military and commercial communication systems. In this paper, we propose a new method to increase the security of MIMO-OFDM system using the change of location of fake subcarrier. The fake subcarriersâ€™ location is generated per packet of data using Pseudo Random sequence generator. The simulation results show that t

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D. K., Onebunne, Nwabueze C. A., Ekengwu B. O., and Odukwe P. C. "Improving Bit Error Rate of MIMO-OFDM System Using Discrete Wavelet Transformation." International Journal of Advanced Networking and Applications 14, no. 02 (2022): 5378–84. http://dx.doi.org/10.35444/ijana.2022.14208.

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This paper has developed a discrete wavelet transform (DWT) for multicarrier modulation in MIMO-OFDM system. The proposed system used additive Gaussian white noise (AGWN) and Rayleigh flat fading channel with respect to SNR using binary phase shift keying (BPSK). The algorithms for various scenarios of MIMO-OFDM system have been developed and simulated in MATLAB environment. The performance metric of the system was based on bit error ratio (BER) variation over values of signal to noise ratio (SNR) for different transmit and receive antennas including single input multiple output (SIMO) arrange

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Srinivasulu, Owk, and P. Rajesh Kumar. "Analysis of Multiple Input Multiple Output-Orthogonal Frequency Division Multiplexing with Dynamic Optimal Power Allocation." Engineering, Technology & Applied Science Research 14, no. 4 (2024): 15515–21. http://dx.doi.org/10.48084/etasr.7459.

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Multiple Input Multiple Output (MIMO) is a technology that combines multiple antennas and Orthogonal Frequency Division Multiplexing (OFDM) modulation to increase the data rate and spectral efficiency of wireless communication systems. Equalization problems are one of the key issues with MIMO-OFDM systems, which are caused by multiple antennas and subcarriers. Optimal Power Allocation (OPA) in MIMO-OFDM is a critical component for achieving high spectral efficiency and improving the overall performance of the system. OPA refers to the process of allocating power to the different subcarriers an

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Elsanousi, A., and S. Oztürk. "Performance Analysis of OFDM and OFDM-MIMO Systems under Fading Channels." Engineering, Technology & Applied Science Research 8, no. 4 (2018): 3249–54. http://dx.doi.org/10.48084/etasr.2209.

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Fourth-generation (4G) wireless communication system is mainly based on MIMO (multiple input and multiple output) and OFDM (orthogonal frequency division multiplexing). The combination of these two techniques leads to a better system, known as OFDM-MIMO system, providing higher capacity and data rate. This paper demonstrates the BER (bit error rate) performance of OFDM and OFDM-MIMO system using convolution code to encrypt the data stream that can be sent over communication channels. Simulation is made on Matlab using three different channels (AWGN, Rician and Rayleigh). The simulation results

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Elsanousi, Abdulbagi, and Sitki Ozturk. "Performance Analysis of OFDM and OFDM-MIMO Systems under Fading Channels." Engineering, Technology & Applied Science Research 8, no. 4 (2018): 3249–54. https://doi.org/10.5281/zenodo.1450694.

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Fourth-generation (4G) wireless communication system is mainly based on MIMO (multiple input and multiple output) and OFDM (orthogonal frequency division multiplexing). The combination of these two techniques leads to a better system, known as OFDM-MIMO system, providing higher capacity and data rate. This paper demonstrates the BER (bit error rate) performance of OFDM and OFDM-MIMO system using convolution code to encrypt the data stream that can be sent over communication channels. Simulation is made on Matlab using three different channels (AWGN, Rician and Rayleigh). The simulation results

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Pyla, Srinu, K. Padma Raju, and N. Bala Subrahmanyam. "Performance Analysis of Adaptive Filter Channel Estimated MIMO OFDM Communication System." International Journal of Electrical and Computer Engineering (IJECE) 8, no. 5 (2018): 3829. http://dx.doi.org/10.11591/ijece.v8i5.pp3829-3836.

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Advanced Communication Systems are wideband systems to support multiple applications such as audio, video and data so and so forth. These systems require high spectral efficiency and data rates. In addition, they should provide multipath fading and inter-symbol interference (ISI) free transmission. Multiple input multiple output orthogonal frequency division multiplexing (MIMO OFDM) meets these requirements Hence, MIMO-OFDM is the most preferable technique for long term evaluation advanced (LTE-A). The primary objective of this paper is to control bit error rate (BER) by proper channel coding,

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Pyla, Srinu, K. Padma Raju, and N. Bala Subrahmanyam. "Performance Analysis of Adaptive Filter Channel Estimated MIMO OFDM Communication System." International Journal of Electrical and Computer Engineering (IJECE) 8, no. 5 (2018): 3829. http://dx.doi.org/10.11591/ijece.v8i5.pp3829-3838.

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Advanced Communication Systems are wideband systems to support multiple applications such as audio, video and data so and so forth. These systems require high spectral efficiency and data rates. In addition, they should provide multipath fading and inter-symbol interference (ISI) free transmission. Multiple input multiple output orthogonal frequency division multiplexing (MIMO OFDM) meets these requirements Hence, MIMO-OFDM is the most preferable technique for long term evaluation advanced (LTE-A). The primary objective of this paper is to control bit error rate (BER) by proper channel coding,

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Chen, Yixin, Carmine Clemente, and John J. Soraghan. "Partial Fractional Fourier Transform (PFrFT)-MIMO-OFDM for Known Underwater Acoustic Communication Channels." Information 12, no. 11 (2021): 469. http://dx.doi.org/10.3390/info12110469.

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Communication over doubly selective channels (both time and frequency selective) suffers from significant intercarrier interference (ICI). This problem is severe in underwater acoustic communications. In this paper, a novel partial fractional (PFrFT)-MIMO-OFDM system is proposed and implemented to further mitigate ICI. A new iterative band minimum mean square error (BMMSE) weight combining based on LDLH factorization is used in a scenario of perfect knowledge of channel information. The proposed method is extended from SISO-OFDM configuration to MIMO-OFDM. Simulation results demonstrate that t

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Qi, Meng, and Xin Xin Wang. "MMSE Space-Time Multi-User Detection in OFDM Systems Based on a Variety of Modulation." Applied Mechanics and Materials 401-403 (September 2013): 1908–11. http://dx.doi.org/10.4028/www.scientific.net/amm.401-403.1908.

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MIMO-OFDM is considered as candidates for future 3G/B3G broadband wireless services. High quality mobile services have to eliminate multiple-access interference (MAI) that affects multi-user receiver performance in MIMO-OFDM system. In this paper, we analyze the effect of MAI on MIMO-OFDM system and adapt a successive interference cancellation (SIC) multi-user detection algorithm which based on minimum mean square error (MMSE) algorithm for MIMO-OFDM system. This algorithm by optimizing the sorting structure enables the receiver algorithm has better performance. The simulation results show tha

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Zhang, Peidong. "System optimization for index modulated OFDM." Highlights in Science, Engineering and Technology 53 (June 30, 2023): 88–97. http://dx.doi.org/10.54097/hset.v53i.9686.

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This paper introduces the system optimization scheme of OFDM-IM, an emerging modulation technology that combines OFDM technology and modulation index technology to improve spectral efficiency and system reliability while ensuring high-speed transmission. However, as a new technology, OFDM still has shortcomings. This paper investigates three system optimization schemes for OFDM-IM: he deep learning-based OFDM-IM optimization scheme, MIMO-OFDM-IM, and LDPC coding-assisted subcarrier index protection scheme. It is found that these three optimization schemes are indeed helpful for optimizing the

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Liu, Ming, and Huan Zhang. "A Portable Integrated Ship Monitoring Command System." Applied Mechanics and Materials 536-537 (April 2014): 824–27. http://dx.doi.org/10.4028/www.scientific.net/amm.536-537.824.

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This paper proposes a novel and efficient method for channel equalization of MIMO- OFDM system. The method utilizes extreme learning machine (ELM), a class of supervised learning algorithms, to achieve fast training and low bit error rates. The numerical simulation results show that the proposed methods significantly outperform traditional feed-forward neural networks based MIMO-OFDM system equalizers in terms of bit error rate performance.

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Venkatramanan, M., and M. Chinnadurai. "Modeling an Enhanced Modulation Classification Approach using Arithmetic Optimization with Deep Learning for MIMO-OFDM Systems." Measurement Science Review 24, no. 2 (2024): 47–53. http://dx.doi.org/10.2478/msr-2024-0007.

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Abstract In a Multiple-Input Multiple-Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) method, multiple antennas can be used on either the transmitter or receiver end to improve the system capacity, data throughput, and robustness. OFDM has been used as the modulation system that divides the data stream into multiple parallel low-rate subcarriers. MIMO enhances the system by utilizing spatial diversity and multiplexing abilities. Modulation classification in the MIMO-OFDM systems describes the process of recognizing the modulation scheme used by the communicated signals in a MIMO-

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Akash, A. Sindhikar1 &. Dr.S.P. Mohani2. "IMPLEMENTATION OF MIMO-OFDM SYSTEM USING CORDIC BASED FFT FOR WIRELESS APPLICATIONS." GLOBAL JOURNAL OF ENGINEERING SCIENCE AND RESEARCHES [NC-Rase 18] (November 15, 2018): 1–8. https://doi.org/10.5281/zenodo.1488661.

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Orthogonal frequency division multiplexing based communication system is one of the modulation techniques for wireless communication. Multiple input multiple output orthogonal frequency division multiplexing (MIMO-OFDM) delivers a significant performance improvement in terms of many parameters like transmission rate, Bit error rate(BER),cyclic prefix, number of subcarriers, modulation types etc. In this paper, the study of an MIMO-OFDM system has been done using different modulation technique, forward error codes and channels. The simulation is done in two steps. The first step discusses the i

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Srinu, Pyla, Padma Raju K., and Bala Subrahmanyam N. "Performance analysis of adaptive filter channel estimated MIMO OFDM communication system." International Journal of Electrical and Computer Engineering (IJECE) 8, no. 5 (2018): 3829–38. https://doi.org/10.11591/ijece.v8i5.pp3829-3838.

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Advanced Communication Systems are wideband systems to support multiple applications such as audio, video and data so and so forth. These systems require high spectral efficiency and data rates. In addition, they should provide multipath fading and inter-symbol interference (ISI) free transmission. Multiple input multiple output orthogonal frequency division multiplexing (MIMO OFDM) meets these requirements Hence, MIMO-OFDM is the most preferable technique for long term evaluation advanced (LTE-A). The primary objective of this paper is to control bit error rate (BER) by proper channel coding,

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N. Jayanthi, P., and S. Ravishankar. "Model-based compressed sensing algorithms for MIMO- OFDM channel estimation." International Journal of Engineering & Technology 7, no. 2.4 (2018): 5. http://dx.doi.org/10.14419/ijet.v7i2.4.10030.

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High data rates on the wireless channel can be achieved by combining orthogonal frequency division multiplexing (OFDM) with multiple input multiple output (MIMO) communication modulation scheme. MIMO-OFDM system impulse response of the channel is approximately sparse. Sparse channelestimation can be done using Compressive Sensing (CS) techniques. In this paper, a low complexity model based CoSaMp Compressive Sensing (CS) algorithm with conventional tools namely Least Square (LS) and Least Mean Square (LMS) are used for MIMO-OFDM channel estimation. Simulation results show amodel based CoSaMP f

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Duraisamy, Kumutha, Tamilvizhi Thanarajan, and Meshal Alharbi. "Implementation of Omar Pigeon Space-Time (OPST) Algorithm to Mitigate the Interference and Peak-to-Average Power Ratio (PAPR) Using RPR Mobile and HST-HM in the 5G." Traitement du Signal 39, no. 5 (2022): 1631–38. http://dx.doi.org/10.18280/ts.390520.

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Nowadays, the 5G parameters play an eminent role in the massive Multiple-input, multiple-output orthogonal frequency-division multiplexing (MIMO-OFDM) system for enriching high signal to noise ratio (SNR). 5G application has emerged in the role of artificial intelligence for involving the reduction of Peak to Average Power Ratio (PAPR) and Bit Error Rate (BER). In MIMO – OFDM system, the high PAPR is a tremendous drawback during the transmission of bit symbol with the number of sub-carriers in the signal. To avoid Intercarrier Interference (ICI) during transmission of the number of sub-carrier

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Del Puerto-Flores, J. Alberto, Francisco R. Castillo-Soria, Carlos A. Gutiérrez, and Fernando Peña-Campos. "Efficient Index Modulation-Based MIMO OFDM Data Transmission and Detection for V2V Highly Dispersive Channels." Mathematics 11, no. 12 (2023): 2773. http://dx.doi.org/10.3390/math11122773.

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Vehicle-to-vehicle (V2V) communication networks are based on vehicles that wirelessly exchange data, traffic congestion, and safety warnings between them. The design of new V2V systems requires increasingly energetically and spectrally efficient systems. Conventional multiple-input–multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems have been used successfully for the last decade. However, MIMO-OFDM systems need to be improved to face future communication networks in high-mobility environments. This article proposes an efficient index modulation (IM)-based MIMO-OFD

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VijayaLakshmi, Dr M., and C. Anisha. "Massive MIMO-OFDM Transmission Without Cellular Networks Using Frequency - Selective Fading Channels." International Journal for Research in Applied Science and Engineering Technology 11, no. 10 (2023): 1410–17. http://dx.doi.org/10.22214/ijraset.2023.56225.

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Abstract: For cell-free massive multi-input multi-output (CF-m-MIMO) across frequency-selective fading channels, this system introduces and determines the effectiveness of the orthogonal frequency-division multiplexing (OFDM)-based multi-carrier transmission. The CF-m-MIMO-OFDM system can accommodate a substantial user base and is flexible enough to offer a range of data rates for usage in a variety of contexts. With its scalability and flexibility, the CF-m-MIMO-OFDM transmission network can serve a large number of users at variable data rates. It is proposed to beamform in the frequency-doma

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Wang, Yang, Yunhe Cao, Tat-Soon Yeo, Yuanhao Cheng, and Yulin Zhang. "Sparse Reconstruction-Based Joint Signal Processing for MIMO-OFDM-IM Integrated Radar and Communication Systems." Remote Sensing 16, no. 10 (2024): 1773. http://dx.doi.org/10.3390/rs16101773.

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Multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) technology is widely used in integrated radar and communication systems (IRCSs). Moreover, index modulation (IM) is a reliable OFDM transmission scheme in the field of communication, which transmits information by arranging several distinguishable constellations. In this paper, we propose a sparse reconstruction-based joint signal processing scheme for integrated MIMO-OFDM-IM systems. Combining the advantages of MIMO and OFDM-IM technologies, the integrated MIMO-OFDM-IM signal design is realized through the r

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Aryal, SR, and H. Dhungana. "Channel Estimation in MIMO-OFDM System." Nepal Journal of Science and Technology 14, no. 2 (2014): 97–102. http://dx.doi.org/10.3126/njst.v14i2.10421.

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There are no limit of human desire, so day by day we need much higher data speed to facilitate our need but every physical resource like frequency band, transmit signal strength are finite. Within the given limited resource, higher data speed is accomplished by new proficiency called Multiple Input Multiple Output (MIMO), Orthogonal Frequency Division Multiplexing (OFDM) system. MIMO-OFDM fulfills the high data rate requirement through spatial multiplexing gain and improved link reliability due to antenna diversity gain. With this technique, both interference reduction and maximum diversity ga

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Nawaf, Shahir Fleyeh, Lujain Sabah Abdula, and Abdulmutalib A.-Wahab Husein. "Reliability Achievement of MIMO-OFDM Communication Systems." International Conference on Applied Engineering and Natural Sciences 1, no. 1 (2023): 634–40. http://dx.doi.org/10.59287/icaens.1070.

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Wireless communication must have high spectral efficacy and the ability to resist fading channel in an environment of channel multipath, and it is difficult to achieve these requirements with traditional modulation techniques, but the Multiple system Input Multiple Output-Orthogonal Frequency Division Multiplexing (MIMO-OFDM) It can fulfill these requirements. Research offers a way to improve the performance of OFDM- MIMO system by decreasing the Bit Error Rate (BER) using both (DWT) Discrete Wavelet Transform and Convolutional Coding (CC). The OFDM system is modeled with a single antenna at t

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Dang, Khoa Le, Tung Thanh Vu, Tu Thanh Nguyen, and Phuong Huu Nguyen. "Indoor optical wireless MIMO-OFDM system." Science and Technology Development Journal 17, no. 1 (2014): 5–16. http://dx.doi.org/10.32508/stdj.v17i1.1238.

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Indoor optical wireless systems have attracted attention, because they allow high-speed transmission without electromagnetic interference. Multi Input Multi Output (MIMO) techniques are very promising in providing high data rate or providing performance over fading channels. Orthogonal frequency division multiplexing (OFDM) can send multiple high speed signals by using orthogonal carrier frequencies. In this paper, we propose an optical wireless MIMO-OFDM system to achieve better performance. The signal of each optical transmit antenna is detected by using zero forcing (ZF) algorithm. We use t

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M. Abd Elkader, Hala, Gamal M. Abdel-Hamid, Adly Tag El-Dien, and Asmaa A. Nassif. "Combined Beamforming with Orthogonal Space Time Block Code for MIMO-OFDM with Simple Feedback." Indonesian Journal of Electrical Engineering and Computer Science 4, no. 3 (2016): 580. http://dx.doi.org/10.11591/ijeecs.v4.i3.pp580-585.

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<p>In this paper, we introduce a proposed scheme to enhance the performance of orthogonal space time block code (OSTBC) with four time slots and two antennas by combing OSTBC with random beamforming to can use it in the downlink transmission for a mobile system. Multiple-input multiple-output orthogonal frequency-division multiplexing (MIMO-OFDM) system has been recognized as one of the most promising techniques to achieve a good service and increase data rate in the next generation (4&amp;5G) broadband wireless communications. So, we apply Space time block code (STBC) for MIMO-OFDM

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Ida, Yuta, Chang-Jun Ahn, Takeshi Kamio, Hisato Fujisaka, and Kazuhisa Haeiwa. "Interference Cancellation Using Replica Signal for HTRCI-MIMO/OFDM in Time-Variant Large Delay Spread Longer Than Guard Interval." Journal of Electrical and Computer Engineering 2012 (2012): 1–10. http://dx.doi.org/10.1155/2012/571985.

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Orthogonal frequency division multiplexing (OFDM) and multiple-input multiple-output (MIMO) are generally known as the effective techniques for high data rate services. In MIMO/OFDM systems, the channel estimation (CE) is very important to obtain an accurate channel state information (CSI). However, since the orthogonal pilot-based CE requires the large number of pilot symbols, the total transmission rate is degraded. To mitigate this problem, a high time resolution carrier interferometry (HTRCI) for MIMO/OFDM has been proposed. In wireless communication systems, if the maximum delay spread is

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Yang, Ling, Ming Ming Nie, Zi Long Zhong, Bin Bin Xue, and Na Lv. "Channel Equalization of MIMO-OFDM System Based on Extreme Learning Machine." Applied Mechanics and Materials 536-537 (April 2014): 1751–57. http://dx.doi.org/10.4028/www.scientific.net/amm.536-537.1751.

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This paper proposes a novel and efficient method for channel equalization of MIMO-OFDM system. The method utilizes extreme learning machine (ELM), a class of supervised learning algorithms, to achieve fast training and low bit error rates. The numerical simulation results show that the proposed methods significantly outperform traditional feed-forward neural networks based MIMO-OFDM system equalizers in terms of bit error rate performance.

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Md, Mirazur Rahman, Abdullah-Al-Mamun Md., Fathoni Kabir Rizal, Rahman Abidur, and Mahmuda Subaha. "Bit Error Rate Performance Analysis of a Multiple Amplify and Forward Relaying Aided Cooperative MIMO-OFDM System." International Journal of Engineering and Advanced Technology (IJEAT) 9, no. 3 (2021): 2355–69. https://doi.org/10.35940/ijeat.C5727.029320.

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In wireless systems the orthogonal frequency division multiplexing (OFDM) is one of the most influential means of transmission techniques. Data channel having higher speed are converted into some parallel channels by OFDM. For better performance of wireless network, cooperative communication using multiple relay is widely used. Substantial improvement can be achieved in case of reliability and throughput for wireless network if multiple relays are implemented between the source and destination by developing cooperative communication with multiple input multiple output (MIMO) OFDM. A mathematic

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Jung, Yong-An, and Young-Hwan You. "Efficient Joint Estimation of Carrier Frequency and Sampling Frequency Offsets for MIMO-OFDM ATSC Systems." Symmetry 10, no. 11 (2018): 554. http://dx.doi.org/10.3390/sym10110554.

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Multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) is appealing for the provision of high spectral efficiency in digital terrestrial broadcast systems. To fully obtain its advantageous features, it is very important to remove the frequency mismatch between the transmitter and the receiver. In this paper, we present the performance analysis of joint estimation of carrier and sampling frequency offsets in the MIMO-OFDM-based advanced television systems committee (ATSC) 3.0 system. In the MIMO-OFDM ATSC system, the continual pilot (CP) is primarily utilized to p

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Kansal, Lavish, Salah Berra, Mohamed Mounir, Rajan Miglani, Rui Dinis, and Khaled Rabie. "Performance Analysis of Massive MIMO-OFDM System Incorporated with Various Transforms for Image Communication in 5G Systems." Electronics 11, no. 4 (2022): 621. http://dx.doi.org/10.3390/electronics11040621.

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Modern-day applications of fifth-generation (5G) and sixth-generation (6G) systems require fast, efficient, and robust transmission of multimedia information over wireless communication medium for both mobile and fixed users. The hybrid amalgamation of massive multiple input multiple output (mMIMO) and orthogonal frequency division multiplexing (OFDM) proves to be an impressive methodology for fulfilling the needs of 5G and 6G users. In this paper, the performance of the hybrid combination of massive MIMO and OFDM schemes augmented with fast Fourier transform (FFT), fractional Fourier transfor

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Huang, Xiaoli, Yumiao Yuan, and Jingyu Li. "MIMO Signal Detection Based on IM-LSTMNet Model." Electronics 13, no. 16 (2024): 3153. http://dx.doi.org/10.3390/electronics13163153.

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Signal detection is crucial in multi-input multi-output orthogonal frequency division multiplexing (MIMO-OFDM) systems, yet classical detection methods often struggle with nonlinear issues in wireless channels. To handle this challenge, we propose a novel signal detection method for MIMO-OFDM system based on the fractional Fourier transform (FrFT), leveraging the robust time series processing capabilities of long short-term memory (LSTM) networks. Our innovative approach, termed IM-LSTMNet, integrates LSTM with convolutional neural networks (CNNs) and incorporates a Squeeze and Excitation Netw

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Ruan, Jin Xin, Yan Xu, and Miao Cui. "Frequency-Hopping Communication Technology Based on Self-Adaptive MIMO-OFDM System." Advanced Materials Research 945-949 (June 2014): 2230–36. http://dx.doi.org/10.4028/www.scientific.net/amr.945-949.2230.

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Along with the gradual increase of intelligent and information equipment on the battlefield, the fierce electronic warfare between the enemy and us makes the electromagnetic environment of the battlefield more and more severe. The anti-jamming capability of conventional frequency-hopping communication system is inadequate such as anti-dynamic interference, anti-intercept, etc., thus posing a serious threat to normal military communication. Moreover, currently the data transmission rate of frequency-hopping system is fairly lower, and cannot meet the increasing large-capacity real-time data tra

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Bharti, Nirmal, Saloni Kumari, and Angelina Kullu. "Enhancing MIMO-OFDM Performance: Innovative Techniques for PAPR Reduction and BER Optimization." Stallion Journal for Multidisciplinary Associated Research Studies 3, no. 4 (2024): 75–83. http://dx.doi.org/10.55544/sjmars.3.4.9.

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Increased channel capacity and enhanced BER performance are two benefits of integrating MIMO and OFDM methods in a MIMO-OFDM wireless communication system. Because of this, the method for high data-rate transmission is now very compatible with both present and next generations of communication systems. Nevertheless, the method also bears the significant PAPR issue related to OFDM signals, which still needs a workable solution. An technique for reducing PAPR is presented in this study to address the issue of excessive PAPR in MIMO-OFDM systems. The suggested technique combines the original tran

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Tang, Zhou, and Wang. "Singular Value Decomposition Channel Estimation in STBC MIMO-OFDM System." Applied Sciences 9, no. 15 (2019): 3067. http://dx.doi.org/10.3390/app9153067.

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The multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) technology is the combination of the OFDM and MIMO technologies, which could improve the system capacity and make efficient utilization of the frequency spectrum. This paper utilizes space-time block coding (STBC) to achieve diversity gains and combat the channel fading. However, channel estimation is an essential block for space-time block decoding (STBD). Many channel estimation methods are utilized for the single antenna OFDM system, but they cannot be directly applied to the multiple antennas system d

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Minggan Ye, Minggan Ye, Wei Hu Minggan Ye, Yifeng Zhao Wei Hu, Lianfen Huang Yifeng Zhao, and Zhiyuan Shi Lianfen Huang. "Beamforming Design for OFDM Joint Sensing and Communication System." 網際網路技術學刊 23, no. 7 (2022): 1449–59. http://dx.doi.org/10.53106/160792642022122307001.

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<p>In this paper, we discussed the beamforming schemes for OFDM-based joint sensing and communication (OFDM-JSC) system, which enable JSC system to use directional beams to detect directions of interest, while communicating with one or more downlink users, thus further enhancing the practicability of JSC system. Specifically, we equip OFDM-JSC transmitter with hybrid beamforming structure and digital beamforming structure in SU-MIMO and MU-MISO scenarios, respectively. For SU-MIMO JSC, we separately considered the hybrid beamforming design with partially connected structure and fully con

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Guo, Xinyue, Keer Zhang, and Xufa Huang. "Switching MIMO System with Adaptive OFDM Modulation for Indoor Visible Light Communication." Advances in Condensed Matter Physics 2018 (September 2, 2018): 1–7. http://dx.doi.org/10.1155/2018/5694196.

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In this paper, we propose and experimentally demonstrate a switching multiple input and multiple output (MIMO) system combining with adaptive orthogonal frequency division multiplexing (OFDM) modulation for high-speed indoor visible light communications. The adaptive OFDM modulation, which is realized by power and bit allocation on OFDM subchannels, is utilized to achieve the maximum channel capacity under a given target bit error rate (BER). Meanwhile, the MIMO mode switches between spatial multiplexing and transmit diversity adapting to the channel correlation, where the modulation order sol

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Sure, Pallaviram, and Chandra Mohan Bhuma. "On the Comparison of Various Overhead Arrangements for Massive MIMO-OFDM Channel Estimation." International Journal of Electronics and Telecommunications 60, no. 2 (2014): 173–79. http://dx.doi.org/10.2478/eletel-2014-0021.

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Abstract Massive multi input multi output (MIMO) systems incorporate orthogonal frequency division multiplexing (OFDM) technology to render high data rate services for future wireless communication applications. The channel estimator (CE) employed by a reliable massive MIMO-OFDM system requires huge amount of overhead in the form of known and null data transmissions, hence limiting the system spectral efficiency (SE). Often, CE design is a tradeoff between SE and system reliability. In this paper, CE with three different overhead arrangements, namely time domain synchronous (TDS), comb type wi

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