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Journal articles on the topic 'IDFT'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Dr, Krishnamoorthy Kannan, and Hemachandran Ravikumar Dr. "Analysis of Principle Behind Frequency Embedding Technology Through Intrinsic Data Field Transfer Method." International Journal of Engineering Research and Reviews 11, no. 4 (2023): 48–53. https://doi.org/10.5281/zenodo.10200648.

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<strong>Abstract:</strong>  Frequency Embedding Technology (FET) is an emerging paradigm in data transmission and analysis, revolutionizing conventional methods by embedding information within frequency domains. This research paper conducts an in-depth analysis of the underlying principle of FET, specifically focusing on its application through the Intrinsic Data Field Transfer (IDFT) method. IDFT is a novel approach that exploits inherent data fields for seamless information transfer, bypassing explicit encoding techniques.The study aims to elucidate the theoretical framework and practic

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YONEDA, SHOJIRO, ISAO NAKANISHI, ITSUO SASAKI, and AKIO OGIHARA. "Switched-capacitor DFT and IDFT circuit." International Journal of Electronics 67, no. 6 (1989): 839–51. http://dx.doi.org/10.1080/00207218908921134.

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Reimer, Tyson, Mario Solis-Nepote, and Stephen Pistorius. "The impact of the inverse chirp z-transform on breast microwave radar image reconstruction." International Journal of Microwave and Wireless Technologies 12, no. 9 (2020): 848–54. http://dx.doi.org/10.1017/s1759078720000379.

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This work examines the impact of the inverse chirp z-transform (ICZT) for frequency-to-time-domain conversion during image reconstruction of a pre-clinical radar-based breast microwave imaging system operating over 1–8 GHz. Two anthropomorphic breast phantoms were scanned with this system, and the delay-multiply-and-sum beamformer was used to reconstruct images of the phantoms, after using either the ICZT or the inverse discrete Fourier transform (IDFT) for frequency-to-time domain conversion. The contrast, localization error, and presence of artifacts in the reconstructions were compared. The

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Ghassemi, A., and T. A. Gulliver. "Low-Complexity Distortionless Techniques for Peak Power Reduction in OFDM Communication Systems." Journal of Computer Networks and Communications 2012 (2012): 1–13. http://dx.doi.org/10.1155/2012/929763.

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A high peak-to-average power ratio (PAPR) is one of the major drawbacks to using orthogonal frequency division multiplexing (OFDM) modulation. The three most effective distortionless techniques for PAPR reduction are partial transmit sequence (PTS), selective mapping (SLM), and tone reservation (TR). However, the high computational complexity due to the inverse discrete Fourier transform (IDFT) is a problem with these approaches. Implementation of these techniques typically employ direct computation of the IDFT, which is not the most efficient solution. In this paper, we consider the developme

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A. Alwan, Majid. "New Design of Low Complexity Multipliers in DFT/IDFT." Basrah journal of engineering science 20, no. 2 (2020): 66–73. http://dx.doi.org/10.33971/bjes.20.2.8.

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6

Gunther, J. H. "Simultaneous DFT and IDFT of real N-point sequences." IEEE Signal Processing Letters 9, no. 8 (2002): 245–46. http://dx.doi.org/10.1109/lsp.2002.803006.

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Feng, Qi, Jiyong Pang, Marco Maso, Merouane Debbah, and Wen Tong. "IDFT-VFDM for Supplementary Uplink and LTE-NR Co-Existence." IEEE Transactions on Wireless Communications 19, no. 5 (2020): 3435–48. http://dx.doi.org/10.1109/twc.2020.2973641.

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Ding, Guangyao, Qi Feng, Jiyong Pang, Rui Yin, and Guanding Yu. "Unitary Matrix Method for PAPR Reduction of IDFT-VFDM Signals." IEEE Wireless Communications Letters 9, no. 12 (2020): 2107–11. http://dx.doi.org/10.1109/lwc.2020.3014259.

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Xiao, Xiangli, Junjian Huang, Yushu Zhang, and Xing He. "Efficient and Secure Outsourcing of DFT, IDFT, and Circular Convolution." IEEE Access 7 (2019): 60126–33. http://dx.doi.org/10.1109/access.2019.2915196.

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Salous, S. "The design of linear phase FIR filters using the IDFT." IEEE Transactions on Education 41, no. 3 (1998): 229–31. http://dx.doi.org/10.1109/13.704553.

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Zhang, Zongyu, Chengwei Zhou, Yujie Gu, Jinfang Zhou, and Zhiguo Shi. "An IDFT approach for coprime array direction-of-arrival estimation." Digital Signal Processing 94 (November 2019): 45–55. http://dx.doi.org/10.1016/j.dsp.2019.05.006.

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12

Wu, Chih-Feng, Chun-Hung Chen, and Muh-Tian Shiue. "A Design of Input-Decimation Technique for Recursive DFT/IDFT Algorithm." IEEE Transactions on Circuits and Systems I: Regular Papers 66, no. 12 (2019): 4713–26. http://dx.doi.org/10.1109/tcsi.2019.2931794.

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13

Kang, Seog. "An OFDM with 3-D signal mapper and 2-D IDFT modulator." IEEE Communications Letters 12, no. 12 (2008): 871–73. http://dx.doi.org/10.1109/lcomm.2008.081197.

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14

El-Barbary, Mohamed, Fatma Newagy, and Ismail Hafez. "A Novel IDFT/DFT Based Transceiver for Faster than Nyquist Signaling Optimization." Wireless Personal Communications 97, no. 4 (2017): 5643–56. http://dx.doi.org/10.1007/s11277-017-4799-6.

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15

An, Changyoung, and Heung-Gyoon Ryu. "Design and Performance Evaluation of OTFS Modulation System using 2D iDFT and DFT." Journal of the Institute of Electronics and Information Engineers 54, no. 9 (2017): 14–20. http://dx.doi.org/10.5573/ieie.2017.54.9.14.

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Wu, Chih-Feng, Chun-Hung Chen, and Muh-Tian Shiue. "Corrections to “A Design of Input-Decimation Technique for Recursive DFT/IDFT Algorithm”." IEEE Transactions on Circuits and Systems I: Regular Papers 67, no. 6 (2020): 2152. http://dx.doi.org/10.1109/tcsi.2020.2987537.

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Manton, J. H. "Dissecting OFDM: the independent roles of the cyclic prefix and the IDFT operation." IEEE Communications Letters 5, no. 12 (2001): 474–76. http://dx.doi.org/10.1109/4234.974490.

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JWA, J. W. "An OFDM Scheme with Pre-IDFT/DFT on Frequency-Selective Rayleigh Fading Channels." IEICE Transactions on Communications E88-B, no. 7 (2005): 3073–77. http://dx.doi.org/10.1093/ietcom/e88-b.7.3073.

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19

Wang, Tingjian, Liqin Wang, and Xiaoli Zhao. "IDFT numerical simulation method for Gaussian rough surface with relatively large correlation length." Transactions of Tianjin University 21, no. 3 (2015): 216–22. http://dx.doi.org/10.1007/s12209-015-2422-z.

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20

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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Fertner, Antoni, Mattias Hyll, and Anders Orling. "Efficient computation of the DFT and IDFT in communication systems using Discrete Multitone modulation." Journal of Communications and Networks 1, no. 2 (1999): 86–88. http://dx.doi.org/10.1109/jcn.1999.6596751.

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Lin, Chi-Hsiang, Chun-Ting Lin, Chia-Chien Wei, and Sien Chi. "DFT/IDFT-free receiving scheme for spread-OFDM signals employing low-sampling-rate ADCs." Optics Express 25, no. 22 (2017): 27750. http://dx.doi.org/10.1364/oe.25.027750.

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VAN, L. D., C. T. LIN, and Y. C. YU. "VLSI Architecture for the Low-Computation Cycle and Power-Efficient Recursive DFT/IDFT Design." IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E90-A, no. 8 (2007): 1644–52. http://dx.doi.org/10.1093/ietfec/e90-a.8.1644.

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24

Bracale, A., P. Caramia, G. Carpinelli, P. De Falco, and P. Verde. "Cosine Windows in Interpolated DFT-based Method for an Accurate High-Frequency Distortion Assessment in Power Systems." Renewable Energy and Power Quality Journal 21, no. 1 (2023): 323–28. http://dx.doi.org/10.24084/repqj21.312.

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The transformation of electrical networks in the context of the new smart grid paradigm unavoidably involves new challenges regarding Power Quality (PQ) disturbances not only for customers but also for all the other involved stakeholders. Among PQ disturbances, waveform distortions have recently gained growing interest due to the massive presence of new technologies in distributed energy resources, in modern loads and in advanced smart metering systems. The presence of these devices determines arduous electromagnetic compatibility problems since the current and voltage waveform distortions in

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Waqas, Ghulam Jilani, Ishtiaq Ahmad, Muhammad Kashif Samee, Muhammad Nasir Khan, and Ali Raza. "A hybrid OFDM–CDMA-based robust image watermarking technique." International Journal of Wavelets, Multiresolution and Information Processing 18, no. 06 (2020): 2050043. http://dx.doi.org/10.1142/s0219691320500435.

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Digital watermarking is a process of embedding hidden information called watermark into different kinds of media objects. It uses basic modulation, multiplexing and transform techniques of communication for hiding information. Traditional techniques used are least significant bit (LSB) modification, discrete cosine transform (DCT), discrete wavelet transform (DWT), discrete Fourier transform (DFT), code division multiple access (CDMA) or a combination of these. Among these, CDMA is the most robust against different attacks except geometric attacks. This paper proposes a blind and highly robust

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26

Kuo, Po Yu, and Gan Zhi Fan. "Analysis and Implementation of Rayleigh Fading Channel Using MATLAB." Applied Mechanics and Materials 764-765 (May 2015): 476–80. http://dx.doi.org/10.4028/www.scientific.net/amm.764-765.476.

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Mobile wireless communication is the fastest growing segment of the communication industry. However, it is faced with the challenge of providing reliable high-speed communications due to channel impediments which change over time in unpredictable ways. To analyze the reliability and performance of real communication system, the Rayleigh fading channel is generally applied to simulate the real wireless communication. In this paper, we analyze and implement a flat Rayleigh fading channel based on the inverse discrete Fourier transform (IDFT). The simulation results of level crossing rate (LCR) a

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27

Shen, Wei, and Biyang Wen. "A New Demodulation and Modulation Method Designed for FMCW Radar." Journal of Electrical and Computer Engineering 2010 (2010): 1–6. http://dx.doi.org/10.1155/2010/897429.

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An efficient demodulation method designed for FMCW (Frequency-Modulated Continuous Wave) radar is presented. It is a kind of modified DFT (IDFT) algorithm; the spectrum segment of interest can be easily extracted from the original signal without calculating the whole DFT/FFT. It provides fast demodulation and extraction of desired frequency bands in our HFSWR (High-Frequency Surface Wave Radar) system. The proposed approach enhances the performances of radar system and reduces the computing complexity. The new structure could also be inversely used for signal modulation. And also arbitrary sam

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Zheng, Zuo Yong, and Rui Xia Zhang. "A Fast GPU Algorithm for the Inverse of a Circulant Matrix." Applied Mechanics and Materials 121-126 (October 2011): 3755–59. http://dx.doi.org/10.4028/www.scientific.net/amm.121-126.3755.

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Circulant matrix is a special case of Toeplitz matrix, which is widely used in many domains of specialization, especially in image and digital signal processing. Calculating the inverse of this category of matrices consists of the following three steps: (1) transform the first row vector to frequency space by using DFT; (2) calculate the inverse of each amplitude in the spectrum; (3) apply IDFT to the adjusted spectrum and reconstruct the inverse of the original circulant matrix. This paper implements such a fast algorithm on the GPU, which is proved around five to ten times faster than is exe

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Hwang, Jeng-Kuang, and Yuan-Ping Li. "Efficient Recursive IDFT Scheme for Complex-valued Signals in Tap-selective Maximum-likelihood Channel Estimation." Journal of Signal Processing Systems 60, no. 1 (2009): 71–80. http://dx.doi.org/10.1007/s11265-009-0404-x.

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30

Wang, Mengyuan, Yuye Ling, Zhenxing Dong, et al. "GPU-accelerated iterative method for FD-OCT image reconstruction with an image-level cross-domain regularizer." Optics Express 31, no. 2 (2023): 1813. http://dx.doi.org/10.1364/oe.478970.

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The image reconstruction for Fourier-domain optical coherence tomography (FD-OCT) could be achieved by iterative methods, which offer a more accurate estimation than the traditional inverse discrete Fourier transform (IDFT) reconstruction. However, the existing iterative methods are mostly A-line-based and are developed on CPU, which causes slow reconstruction. Besides, A-line-based reconstruction makes the iterative methods incompatible with most existing image-level image processing techniques. In this paper, we proposed an iterative method that enables B-scan-based OCT image reconstruction,

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31

Pan, Xinyu, Chen Zang, Wanxuan Lu, Guiyuan Jiang, and Qian Sun. "FSFF-Net: A Frequency-Domain Feature and Spatial-Domain Feature Fusion Network for Hyperspectral Image Classification." Electronics 14, no. 11 (2025): 2234. https://doi.org/10.3390/electronics14112234.

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In hyperspectral image (HSI) classification, each pixel is assigned to a specific land cover type, which is critical for applications in environmental monitoring, agriculture, and urban planning. Convolutional neural network (CNN) and Transformers have become widely adopted due to their exceptional feature extraction capabilities. However, the local receptive field of CNN limits their ability to capture global context, while Transformers, though effective in modeling long-range dependencies, introduce computational overhead. To address these challenges, we propose a frequency-domain and spatia

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Li, William Xinzuo, Larry D. Mitchell, Min-Fu Lu, and Michael L. Neumann. "Mapping Nonsquare and Unevenly Spaced 2-D SLDV Data of an Aircraft Fuselage by Using Spatial DFT-IDFT Techniques." Shock and Vibration 3, no. 2 (1996): 135–40. http://dx.doi.org/10.1155/1996/195675.

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The scanning laser Doppler vibrometry (SLDV) technique provides velocities of a structure at 2-dimensional (2-D) angularly evenly spaced (in the laser scanning sense) data points. This causes an unevenly spaced data point distribution on the surface of the test structure. In many cases evenly spaced data point distribution with square or rectangular grids is highly desirable. In this study the SLDV velocity data of a partial surface area of an aircraft fuselage were mapped to truly spatial evenly spaced coordinates by using the spatial DFT-IDFT technique with minimum distortion. This 2-D data

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Zhang, Meng, and Zhisong Bie. "Research on single carrier frequency domain equalization system based on FQPSK modulation." ITM Web of Conferences 17 (2018): 03012. http://dx.doi.org/10.1051/itmconf/20181703012.

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Feher-patented quadrature phase shift keying (fqpsk) modulation is proposed for single-carrier frequency domain equalization (sc-fde). this paper puts forward a new method modulation called cc-bcd-fqpsk. the fqpsk signal is oversampled to make that the discrete fourier transform (dft)/ inverse dft (idft) processing of it can be applied for sc-fde. the methodology for maintaining waveform continuity with a cyclic prefix (cp) is presented. wrap-around viterbi algorithm (wava) is suggested for demodulation after equalization at the receiver. simulation results show that sc-fde system based on cc-

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Shen, Xiaofeng, Zhihong Zhuang, Hongbo Wang, and Feng Shu. "A New Method for Moving-Target HRRP via Double Step Frequency Verified by Simulation." Sensors 22, no. 23 (2022): 9191. http://dx.doi.org/10.3390/s22239191.

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The stepped-frequency (SF) waveform is highly sensitive to the target motion, which induces range shift and echo spread in a high-range-resolution profile (HRRP). This paper proposes a method based on a cross-transmitted double-stepped frequency (DSF) waveform and the phase-cancellation technique. The proposed method obtains the stationary HRRP of the moving targets according to the inverse discrete Fourier transform (IDFT) and complex multiplication. The results also show that the proposed method eliminates the generated false peaks from the existing methods. As a result, the obtained signal-

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Zhou, Pan, Tuo Shi, Jianghui Xin, Yaowei Li, Tian Lv, and Liguo Zang. "Extended Smoothing Methods for Sparse Test Data Based on Zero-Padding." Applied Sciences 13, no. 8 (2023): 4816. http://dx.doi.org/10.3390/app13084816.

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Aiming at the problem of sparse measurement points due to test conditions in engineering, a smoothing method based on zero-padding in the wavenumber domain is proposed to increase data density. Firstly, the principle of data extension and smoothing is introduced. The core idea of this principle is to extend the discrete data series by zero-padding in the wavenumber domain. The conversion between the spatial and wavenumber domains is achieved using the Discrete Fourier Transform (DFT) and the Inverse Discrete Fourier Transform (IDFT). Then, two sets of two-dimensional discrete random data are e

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36

UEDA, Tetsuhiko, and Kenichi SAITOH. "NUMERICAL SIMULATION FOR RANDOM AEROELASTIC RESPONSES USING INVERSE FOURIER TRANSFORM." Aviation 20, no. 3 (2016): 103–9. http://dx.doi.org/10.3846/16487788.2016.1227535.

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This paper reports a new simulation technique for an aeroelastic system which responds to random external forces. Since the aeroelastic system including the effects of unsteady aerodynamics is ordinarily described in the frequency domain, the Inverse Discrete Fourier Transform (IDFT) can be utilized to simulate its random response. The response caused by the external random noise is calculated through a transfer function first in the frequency domain and then converted to the time domain. The objective of the present study is to provide mathematical time history data for evaluating the various

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37

Lai, Shin-Chi, Sheau-Fang Lei, Chia-Lin Chang, Chen-Chieh Lin, and Ching-Hsing Luo. "Low Computational Complexity, Low Power, and Low Area Design for the Implementation of Recursive DFT and IDFT Algorithms." IEEE Transactions on Circuits and Systems II: Express Briefs 56, no. 12 (2009): 921–25. http://dx.doi.org/10.1109/tcsii.2009.2035267.

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38

Jung, Seulkee, and Seongsoo Lee. "Design of Unified HEVC 4×4 IDCT/IDST Block." Journal of IKEEE 19, no. 2 (2015): 271–75. http://dx.doi.org/10.7471/ikeee.2015.19.2.271.

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39

Sang, Tzu-Hsien, and You-Cheng Xu. "Clipping Noise Compensation with Neural Networks in OFDM Systems." Signals 1, no. 1 (2020): 100–109. http://dx.doi.org/10.3390/signals1010005.

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The application of deep learning (DL) to solve physical layer issues has emerged as a prominent topic. In this paper, the mitigation of clipping effects for orthogonal frequency division multiplexing (OFDM) systems with the help of a Neural Network (NN) is investigated. Unlike conventional clipping recovery algorithms, which involve costly iterative procedures, the DL-based method learns to directly reconstruct the clipped part of the signal while the unclipped part is protected. Furthermore, an interpretation of the learned weight matrices of the neural network is presented. It is observed th

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Lai, Shin-Chi, Sheau-Fang Lei, Wen-Ho Juang, and Ching-Hsing Luo. "A Low-Cost, Low-Complexity, and Memory-Free Architecture of Novel Recursive DFT and IDFT Algorithms for DTMF Application." IEEE Transactions on Circuits and Systems II: Express Briefs 57, no. 9 (2010): 711–15. http://dx.doi.org/10.1109/tcsii.2010.2056413.

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Li, Xinqiang, Xingmian Wang, Yanan Qin, and Jing Li. "SNR Classification Based Multi-Estimator IRM Speech Enhancement Algorithm." Journal of Physics: Conference Series 2173, no. 1 (2022): 012086. http://dx.doi.org/10.1088/1742-6596/2173/1/012086.

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Abstract Deep neural network(DNN)-based ideal ratio mask(IRM) estimation methods are often adopted in speech enhancement tasks. In the previous work, IRM estimation was usually realized by a single DNN-based IRM estimator without considering the SNR levels, which had a limited performance in real applications. Therefore, a two stage speech enhancement method is proposed in this paper. Firstly, a DNN-based SNR classifier is employed to classify the speech frames into three classes according to different SNR thresholds. Secondly, three corresponding DNN based IRM estimators related to the three

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42

He, Siyuan, Fan Zhang, Weidong Hu, Lei Zhuang, Xingbin Ye, and Guoqiang Zhu. "Investigation of Range Profiles from a Simplified Ship on Rough Sea Surface and Its Multipath Imaging Mechanisms." International Journal of Antennas and Propagation 2012 (2012): 1–6. http://dx.doi.org/10.1155/2012/894198.

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The range profiles of a two-dimension (2 D) perfect electric conductor (PEC) ship on a wind-driven rough sea surface are derived by performing an inverse discrete Fourier transform (IDFT) on the wide band backscattered field. The rough sea surface is assuming to be a PEC surface. The back scattered field is computed based on EM numerical simulation when the frequencies are sampled between 100 MHz and 700 MHz. Considering the strong coupling interactions between the ship and sea, the complicated multipath effect to the range profile characteristics is fully analyzed based on the multipath imagi

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Moshe, S., and D. Hertz. "On computing DFT of real N-point vector and IDFT of DFT-transformed real N-point vector via single DFT." IEEE Signal Processing Letters 6, no. 6 (1999): 141. http://dx.doi.org/10.1109/97.763146.

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Kim, Hyeung-Yun. "Structural Dynamic System Reconstruction Method for Vibrating Structures." Journal of Dynamic Systems, Measurement, and Control 125, no. 4 (2003): 646–53. http://dx.doi.org/10.1115/1.1605992.

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To determine the natural frequencies and damping ratios of composite laminated plates, we present an efficient modal parameter estimation technique by developing a residual spectrum based structural dynamic system reconstruction. The modal parameters can be estimated from poles and residues of the system transfer functions derived from the state space system matrices. However, for modal parameter estimation of multivariable and higher order structural systems over broad frequency bands, this noniterative algorithm gives high accuracy in determining the natural frequencies and damping ratios. I

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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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Subi, Dr L. Kebila Anns, and Dr A. Albert Raj. "A PROFICIENT PILOT DESIGNING PATTERN FOR CHANNEL ESTIMATION IN MIMO-OFDM SYSTEMS." International Journal of Innovative Research in Advanced Engineering 8, no. 5 (2021): 82–98. http://dx.doi.org/10.26562/ijirae.2021.v0805.002.

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The high data transmission rates in the communication channel is a recent growing demand which is achieved by using the multiple input multiple output-orthogonal frequency division multiplexing (MIMO-OFDM) systems because of their unique properties.. The OFDM systems that adopt the cyclic-delay diversity (CDD) scheme require only one inverse discrete Fourier transform (IDFT) operation at the transmitter. Hence, the CDD provides a low-complexity by means of increasing the transmission diversity in MIMO-OFDM systems. However, the optimal pilot sequences which minimize the mean square error (MSE)

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Jayashankar, Parinitha, and B. N. Shobha. "Deep learning-based channel estimation with application to 5G and beyond networks." International Journal of Reconfigurable and Embedded Systems (IJRES) 13, no. 2 (2024): 271. http://dx.doi.org/10.11591/ijres.v13.i2.pp271-277.

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Channel state information (CSI) feedback estimation for a downlink medium in a massive multiple input multiple output (MIMO) system is an essential and critical task to improve channel capacity and performance yield, especially in a frequency division duplex (FDD) multiplexing system. However, spectral efficiency degradation is a massive issue due to high channel feedback overhead. This work proposes a deep learning-based channel estimation (DLCE) model to improve channel reconstruction efficiency and channel overhead reduction accuracy. The proposed deep learning (DL) mechanism consists of en

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Gifuni, Angelo, and Stefano Perna. "ANALYSIS ON THE CALCULATION OF THE INVERSE DISCRETE FOURIER TRANSFORM (IDFT) OF PASSBAND FREQUENCY RESPONSE MEASUREMENTS IN TERMS OF LOWPASS EQUIVALENT RESPONSE." Progress In Electromagnetics Research 160 (2017): 63–69. http://dx.doi.org/10.2528/pier17081703.

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Mohammed Mustafa Siddeq. "Image Compression using Fourier Transformation with Genetic Algorithm." Journal of Wasit for Science and Medicine 4, no. 1 (2022): 1–11. http://dx.doi.org/10.31185/jwsm.129.

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This paper introduce proposed algorithm consist of: (1) using Discreet Fourier Transformation (DFT) which convert an image into frequency domain image, then compress frequency domain image with Run-Length-Encoding (RLE), and Arithmetic Coding. (2) Apply Inverse Fourier Transformation (IDFT) to obtains an approximately original image, and then compared with original image to get the difference stored in a new matrix called (D(spatial) ). The matrix D(spatial) transformed to frequency domain by Discreet Cosine Transform (DCT) (D(frequency)). Finally applying weight vector (W= [0.5, 0.3, 0.2]) on

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Sangodiah, Anbuselvan, Tham Jee San, Yong Tien Fui, Lim Ean Heng, Ramesh Kumar Ayyasamy, and Norazira A Jalil. "Identifying Optimal Baseline Variant of Unsupervised Term Weighting in Question Classification Based on Bloom Taxonomy." MENDEL 28, no. 1 (2022): 8–22. http://dx.doi.org/10.13164/mendel.2022.1.008.

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Examination is one of the common ways to evaluate the students’ cognitive levels in higher education institutions. Exam questions are labeled manually by educators in accordance with Bloom’s taxonomy cognitive domain. To ease the burden of the educators, several past research works have proposed the automated question classification based on Bloom’s taxonomy using the machine learning technique. Feature selection, feature extraction and term weighting are common ways to improve the accuracy of question classification. Commonly used term weighting method in the past work is unsupervised namely

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