Log in

Relevant bibliographies by topics / Frequency domain multiplexing / Journal articles

To see the other types of publications on this topic, follow the link: Frequency domain multiplexing.

Journal articles on the topic 'Frequency domain multiplexing'

Author: Grafiati

Published: 14 March 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Frequency domain multiplexing.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Chen, Xiang, Hao Liu, Mai Hu, Lu Yao, Zhenyu Xu, Hao Deng, and Ruifeng Kan. "Frequency-Domain Detection for Frequency-Division Multiplexing QEPAS." Sensors 22, no. 11 (May 26, 2022): 4030. http://dx.doi.org/10.3390/s22114030.

Full text

Abstract:

To achieve multi-gas measurements of quartz-enhanced photoacoustic spectroscopy (QEPAS) sensors under a frequency-division multiplexing mode with a narrow modulation frequency interval, we report a frequency-domain detection method. A CH4 absorption line at 1653.72 nm and a CO2 absorption line at 2004.02 nm were investigated in this experiment. A modulation frequency interval of as narrow as 0.6 Hz for CH4 and CO2 detection was achieved. Frequency-domain 2f signals were obtained with a resolution of 0.125 Hz using a real-time frequency analyzer. With the multiple linear regressions of the frequency-domain 2f signals of various gas mixtures, small deviations within 2.5% and good linear relationships for gas detection were observed under the frequency-division multiplexing mode. Detection limits of 0.6 ppm for CH4 and 2.9 ppm for CO2 were simultaneously obtained. With the 0.6-Hz interval, the amplitudes of QEPAS signals will increase substantially since the modulation frequencies are closer to the resonant frequency of a QTF. Furthermore, the frequency-domain detection method with a narrow interval can realize precise gas measurements of more species with more lasers operating under the frequency-division multiplexing mode. Additionally, this method, with a narrow interval of modulation frequencies, can also realize frequency-division multiplexing detection for QEPAS sensors under low pressure despite the ultra-narrow bandwidth of the QTF.

APA, Harvard, Vancouver, ISO, and other styles

2

Lanting, T. M., Hsiao-Mei Cho, John Clarke, Matt Dobbs, Adrian T. Lee, M. Lueker, P. L. Richards, A. D. Smith, and H. G. Spieler. "Frequency domain multiplexing for bolometer arrays." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 520, no. 1-3 (March 2004): 548–50. http://dx.doi.org/10.1016/j.nima.2003.11.311.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Kim, Eun-Hee, Han-Saeng Kim, and Ki-Won Lee. "Range Dividing MIMO Waveform for Improving Tracking Performance." Sensors 21, no. 21 (November 2, 2021): 7290. http://dx.doi.org/10.3390/s21217290.

Full text

Abstract:

A multiple-input multiple-output (MIMO) method that shares the same frequency band can efficiently increase radar performance. An essential element of a MIMO radar is the orthogonality of the waveform. Typically, orthogonality is obtained by spreading different signals into divided domains such as in time-domain multiplexing, frequency-domain multiplexing, and code domain multiplexing. This paper proposes a method of spreading the interference signals outside the range bins of interest for pulse doppler radars. This is achieved by changing the pulse repetition frequency under certain constraints, and an additional gain can be obtained by doppler processing. This method is very effective for improving the angular accuracy of the MIMO radar for a small number of air targets, although it may have limitations in use for many targets or in high clutter environments.

APA, Harvard, Vancouver, ISO, and other styles

4

Wang, Jing, and Dao-ben Li. "Overlapping Multiplexing in Both Time and Frequency Domain." Journal of Electronics & Information Technology 30, no. 5 (March 15, 2011): 1176–79. http://dx.doi.org/10.3724/sp.j.1146.2007.00541.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Sakamoto, Takahide. "Orthogonal time-frequency domain multiplexing with multilevel signaling." Optics Express 22, no. 1 (January 7, 2014): 773. http://dx.doi.org/10.1364/oe.22.000773.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Lanting, T. M., H. M. Cho, J. Clarke, M. A. Dobbs, W. L. Holzapfel, A. T. Lee, M. Lueker, P. L. Richards, A. D. Smith, and H. G. Spieler. "Frequency-Domain SQUID Multiplexing of Transition-Edge Sensors." IEEE Transactions on Appiled Superconductivity 15, no. 2 (June 2005): 567–70. http://dx.doi.org/10.1109/tasc.2005.849921.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Mishra, M., J. Mattingly, J. M. Mueller, and R. M. Kolbas. "Frequency domain multiplexing of pulse mode radiation detectors." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 902 (September 2018): 117–22. http://dx.doi.org/10.1016/j.nima.2018.06.023.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Oh, W. Y., S. H. Yun, B. J. Vakoc, M. Shishkov, A. E. Desjardins, B. H. Park, J. F. de Boer, G. J. Tearney, and B. E. Bouma. "High-speed polarization sensitive optical frequency domain imaging with frequency multiplexing." Optics Express 16, no. 2 (January 14, 2008): 1096. http://dx.doi.org/10.1364/oe.16.001096.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Arik, Sercan O., Daulet Askarov, and Joseph M. Kahn. "Adaptive Frequency-Domain Equalization in Mode-Division Multiplexing Systems." Journal of Lightwave Technology 32, no. 10 (May 2014): 1841–52. http://dx.doi.org/10.1109/jlt.2014.2303079.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Xu, Q., H. Wang, Z. Xu, and G. Li. "Frequency domain multiplexing for parallel acquisition of MR images." Electronics Letters 42, no. 6 (2006): 326. http://dx.doi.org/10.1049/el:20063890.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Lowitz, A. E., A. N. Bender, P. Barry, T. W. Cecil, C. L. Chang, R. Divan, M. A. Dobbs, et al. "Performance of a Low-Parasitic Frequency-Domain Multiplexing Readout." Journal of Low Temperature Physics 199, no. 1-2 (February 14, 2020): 192–99. http://dx.doi.org/10.1007/s10909-020-02384-8.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Hirose, Akira, and Rolf Eckmiller. "Proposal of frequency-domain multiplexing in optical neural networks." Neurocomputing 10, no. 2 (March 1996): 197–204. http://dx.doi.org/10.1016/0925-2312(95)00129-8.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Wei, Meijun, Serdar Sezginer, Guan Gui, and Hikmet Sari. "Bridging Spatial Modulation With Spatial Multiplexing: Frequency-Domain ESM." IEEE Journal of Selected Topics in Signal Processing 13, no. 6 (October 2019): 1326–35. http://dx.doi.org/10.1109/jstsp.2019.2913131.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Iyomoto, N., T. Ichitsubo, K. Mitsuda, N. Y. Yamasaki, R. Fujimoto, T. Oshima, K. Futamoto, et al. "Frequency-domain multiplexing of TES microcalorimeter array with CABBAGE." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 520, no. 1-3 (March 2004): 566–69. http://dx.doi.org/10.1016/j.nima.2003.11.316.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Lanting, T. M., K. Arnold, Hsiao-Mei Cho, John Clarke, Matt Dobbs, William Holzapfel, Adrian T. Lee, et al. "Frequency-domain readout multiplexing of transition-edge sensor arrays." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 559, no. 2 (April 2006): 793–95. http://dx.doi.org/10.1016/j.nima.2005.12.142.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

van der Kuur, J., P. A. J. de Korte, H. F. C. Hoevers, M. P. Bruijn, M. L. Ridder, M. Kiviranta, and H. Seppä. "Frequency-domain multiplexing development for high-count-rate microcalorimeters." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 559, no. 2 (April 2006): 820–22. http://dx.doi.org/10.1016/j.nima.2005.12.209.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Bounab, A., P. de Korte, A. Cros, J. van der Kuur, B. J. van Leeuwen, B. Monna, R. Mossel, A. Nieuwenhuizen, and L. Ravera. "Baseband feedback for SAFARI-SPICA using Frequency Domain Multiplexing." EAS Publications Series 37 (2009): 101–6. http://dx.doi.org/10.1051/eas/0937012.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Kumar, Anand T. N., Steven S. Hou, and William L. Rice. "Tomographic fluorescence lifetime multiplexing in the spatial frequency domain." Optica 5, no. 5 (May 15, 2018): 624. http://dx.doi.org/10.1364/optica.5.000624.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

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 (November 8, 2021): 500. http://dx.doi.org/10.3390/photonics8110500.

Full text

Abstract:

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 of 8.07 Gbit/s, fulfilling the pre-forward error correction (pre-FEC) bit-error-rate (BER) limit. The measured signal-to-noise ratios (SNRs) are 10.96 dB and 14.45 dB, respectively. Here, similar to OFDM, the PowDM can enhance the total system capacity by allowing acceptable signal spectra overlapping among different power division signals to maximize the bandwidth utilization. An experiment to verify and evaluate the proposed work is performed. The modulation and demodulation of OFDM and PowDM are discussed. The optimum power levels of the individual signals in the PowDM signal are also analyzed.

APA, Harvard, Vancouver, ISO, and other styles

20

Shi, Kai, and Benn C. Thomsen. "Sparse Adaptive Frequency Domain Equalizers for Mode-Group Division Multiplexing." Journal of Lightwave Technology 33, no. 2 (January 15, 2015): 311–17. http://dx.doi.org/10.1109/jlt.2014.2374837.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

MacLachlan, R. A., and C. N. Riviere. "High-Speed Microscale Optical Tracking Using Digital Frequency-Domain Multiplexing." IEEE Transactions on Instrumentation and Measurement 58, no. 6 (June 2009): 1991–2001. http://dx.doi.org/10.1109/tim.2008.2006132.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

He, Wang, Xu Qin, Ren Jiejing, and Li Gengying. "Four-channel magnetic resonance imaging receiver using frequency domain multiplexing." Review of Scientific Instruments 78, no. 1 (January 2007): 015102. http://dx.doi.org/10.1063/1.2424426.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

YAMASAKI, N. Y. "Frequency Domain Multiplexing of TES Signals by Magnetic Field Summation." IEICE Transactions on Electronics E89-C, no. 2 (February 1, 2006): 98–105. http://dx.doi.org/10.1093/ietele/e89-c.2.98.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Hattori, K., S. Ariyoshi, M. Hazumi, H. Ishino, A. Kibayashi, S. Mima, C. Otani, et al. "Novel Frequency-Domain Multiplexing MKID Readout for the LiteBIRD Satellite." Journal of Low Temperature Physics 167, no. 5-6 (January 20, 2012): 671–77. http://dx.doi.org/10.1007/s10909-012-0506-x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

van der Kuur, J., P. A. J. de Korte, P. de Groene, N. H. R. Baars, M. P. Lubbers, and M. Kiviranta. "Implementation of frequency domain multiplexing in imaging arrays of microcalorimeters." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 520, no. 1-3 (March 2004): 551–54. http://dx.doi.org/10.1016/j.nima.2003.11.312.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Mlodzianowski, J., D. Uttamchandani, and B. Culshaw. "A simple frequency domain multiplexing system for optical point sensors." Journal of Lightwave Technology 5, no. 7 (1987): 1002–7. http://dx.doi.org/10.1109/jlt.1987.1075592.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

van Soest, Gijs, Martin Villiger, Evelyn Regar, Guillermo J. Tearney, Brett E. Bouma, and Antonius F. W. van der Steen. "Frequency domain multiplexing for speckle reduction in optical coherence tomography." Journal of Biomedical Optics 17, no. 7 (July 13, 2012): 0760181. http://dx.doi.org/10.1117/1.jbo.17.7.076018.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Lu, Lidong, Yuejiang Song, Fan Zhu, and Xuping Zhang. "Coherent optical time domain reflectometry using three frequency multiplexing probe." Optics and Lasers in Engineering 50, no. 12 (December 2012): 1735–39. http://dx.doi.org/10.1016/j.optlaseng.2012.07.008.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Zhang, Xulun, Lixia Xi, Jiacheng Wei, Shucheng Du, Wenbo Zhang, Jianping Li, and Xiaoguang Zhang. "Nonlinear frequency domain PMD modeling and equalization for nonlinear frequency division multiplexing transmission." Optics Express 29, no. 18 (August 17, 2021): 28190. http://dx.doi.org/10.1364/oe.428053.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Jiang, Zheng, Bin Han, Peng Chen, Fengyi Yang, and Qi Bi. "Design of Joint Spatial and Power Domain Multiplexing Scheme for Massive MIMO Systems." International Journal of Antennas and Propagation 2015 (2015): 1–10. http://dx.doi.org/10.1155/2015/368463.

Full text

Abstract:

Massive Multiple-Input Multiple-Output (MIMO) is one of the key techniques in 5th generation wireless systems (5G) due to its potential ability to improve spectral efficiency. Most of the existing works on massive MIMO only consider Time Division Duplex (TDD) operation that relies on channel reciprocity between uplink and downlink channels. For Frequency Division Duplex (FDD) systems, with continued efforts, some downlink multiuser MIMO scheme was recently proposed in order to enable “massive MIMO” gains and simplified system operations with limited number of radio frequency (RF) chains in FDD system. However these schemes, such as Joint Spatial Division and Multiplexing (JSDM) scheme and hybrid precoding scheme, only focus on multiuser transmission in spatial domain. Different from most of the existing works, this paper proposes Joint Spatial and Power Multiplexing (JSPM) scheme in FDD systems. It extends existing FDD schemes from spatial division and multiplexing to joint spatial and power domain to achieve more multiplexing gain. The user grouping and scheduling scheme of JSPM is studied and the asymptotic expression for the sum capacity is derived as well. Finally, simulations are conducted to illustrate the effectiveness of the proposed scheme.

APA, Harvard, Vancouver, ISO, and other styles

31

Xia, Ming Fei, Yong Chuan Wang, and Gui Zhou Lv. "Single-Carrier Frequency Domain Equalization and Wireless Applications." Applied Mechanics and Materials 135-136 (October 2011): 907–12. http://dx.doi.org/10.4028/www.scientific.net/amm.135-136.907.

Full text

Abstract:

In recent years, single-carrier system has again become an interesting and complementary alternative to multi-carrier system such as orthogonal frequency division multiplexing (OFDM). This has been largely due to the use of frequency domain equalizer implemented by means of fast Fourier transforms (FFT), bringing the complexity close to that of OFDM. This paper aims at providing an overview of single-carrier frequency domain equalization (SC-FDE) and its Wireless applications. We review the brief history and system model of SC-FDE, and the integration of SC-FDE and other wireless transmission techniques. We also present several possible future research topics about SC-FDE.

APA, Harvard, Vancouver, ISO, and other styles

32

Xue, Guang Da, Li Li Hu, and Da Jin Wang. "A Novel Frequency Synchronization Algorithm Based on PN Sequences and Pilots for TFU-OFDM Systems." Applied Mechanics and Materials 58-60 (June 2011): 1541–47. http://dx.doi.org/10.4028/www.scientific.net/amm.58-60.1541.

Full text

Abstract:

In this paper, a novel frequency synchronization algorithm for a new modulation scheme named time domain and frequency domain united orthogonal frequency division multiplexing (TFU-OFDM) is introduced. The frequency synchronization method has two-steps, which joints time and frequency domain estimation based on PN sequences and pilots. We utilize the PN sequences as guard intervals in time domain to achieve the first-step estimation and the second-step is realized by the pilots in data blocks in frequency domain. The simulation results and analysis show that the proposed frequency synchronization method could achieve fast and reliable synchronization and sufficient precision, and provides excellent performance for TFU-OFDM systems.

APA, Harvard, Vancouver, ISO, and other styles

33

Kwon, U. K., D. Kim, and G. H. Im. "Frequency domain pilot multiplexing technique for channel estimation of SC-FDE." Electronics Letters 44, no. 5 (2008): 364. http://dx.doi.org/10.1049/el:20083563.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Hubmayr, J., J. E. Austermann, J. A. Beall, D. Becker, D. A. Bennett, B. A. Benson, L. E. Bleem, et al. "Stability of Al-Mn Transition Edge Sensors for Frequency Domain Multiplexing." IEEE Transactions on Applied Superconductivity 21, no. 3 (June 2011): 203–6. http://dx.doi.org/10.1109/tasc.2010.2090630.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Chapman, Benjamin J., Eric I. Rosenthal, Joseph Kerckhoff, Leila R. Vale, Gene C. Hilton, and K. W. Lehnert. "Single-sideband modulator for frequency domain multiplexing of superconducting qubit readout." Applied Physics Letters 110, no. 16 (April 17, 2017): 162601. http://dx.doi.org/10.1063/1.4981390.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Iida, Hiroyuki, Yusuke Koshikiya, Fumihiko Ito, and Kuniaki Tanaka. "High-Sensitivity Coherent Optical Time Domain Reflectometry Employing Frequency-Division Multiplexing." Journal of Lightwave Technology 30, no. 8 (April 2012): 1121–26. http://dx.doi.org/10.1109/jlt.2011.2170960.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

van Soest, Gijs, Martin Villiger, Evelyn Regar, Guillermo J. Tearney, Brett E. Bouma, and Antonius F. W. van der Steena. "Errata: Frequency domain multiplexing for speckle reduction in optical coherence tomography." Journal of Biomedical Optics 17, no. 9 (September 21, 2012): 0998011. http://dx.doi.org/10.1117/1.jbo.17.9.099801.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Yan, Yanxin, Yi Gong, and Maode Ma. "Two-stage frequency-domain oversampling receivers for cyclic prefix orthogonal frequency-division multiplexing systems." IET Communications 10, no. 10 (July 1, 2016): 1246–54. http://dx.doi.org/10.1049/iet-com.2015.0811.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

KAWATA, SOTARO, and AKIRA HIROSE. "FREQUENCY-MULTIPLEXING ABILITY OF COMPLEX-VALUED HEBBIAN LEARNING IN LOGIC GATES." International Journal of Neural Systems 18, no. 02 (April 2008): 173–84. http://dx.doi.org/10.1142/s0129065708001488.

Full text

Abstract:

Lightwave has attractive characteristics such as spatial parallelism, temporal rapidity in signal processing, and frequency band vastness. In particular, the vast carrier frequency bandwidth promises novel information processing. In this paper, we propose a novel optical logic gate that learns multiple functions at frequencies different from one another, and analyze the frequency-domain multiplexing ability in the learning based on complex-valued Hebbian rule. We evaluate the averaged error function values in the learning process and the error probabilities in the realized logic functions. We investigate optimal learning parameters as well as performance dependence on the number of learning iterations and the number of parallel paths per neuron. Results show a trade-off among the learning parameters such as learning time constant and learning gain. We also find that when we prepare 10 optical path differences and conduct 200 learning iterations, the error probability completely decreases to zero in a three-function multiplexing case. However, at the same time, the error probability is tolerant of the path number. That is, even if the path number is reduced by half, error probability is found almost zero. The results can be useful to determine neural parameters for future optical neural network systems and devices that utilize the vast frequency bandwidth for frequency-domain multiplexing.

APA, Harvard, Vancouver, ISO, and other styles

40

Guo, Ye Cai, Qu Chen, Jun Guo, and Xiao Li Miao. "Fractionally Spaced Frequency Equalization Method for Orthogonal Frequency Division Multiplexing (OFDM) Jointing with Modified Pilot Sequences." Applied Mechanics and Materials 198-199 (September 2012): 1569–72. http://dx.doi.org/10.4028/www.scientific.net/amm.198-199.1569.

Full text

Abstract:

In order to obtain accurate and high-speed data transmission, the orthogonal frequency division multiplexing(OFDM) technology is introduced and it is a kind of a multi-carriers modulation technology with high efficiency in the use of frequency band and characteristics of strong anti-interference ability. The fractionally spaced OFDM frequency domain equalization algorithm based on modified pilot sequences is proposed. In this proposed algorithm, one-dimensional linear interpolation method is used to estimate the frequency domain response of all subcarriers by part of the subcarriers’ frequency domain response with reducing the number of transmitted pilot sequences, and received signals are oversampled to acquire more detailed channel information. The computer simulations in underwater acoustic channel show that the performance of proposed method outperforms the single-carrier system and traditional OFDM system.

APA, Harvard, Vancouver, ISO, and other styles

41

Abdourahamane, Ali. "ADVANTAGES OF OPTICAL ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING IN COMMUNICATIONS SYSTEMS." EUREKA: Physics and Engineering 2 (March 31, 2016): 27–33. http://dx.doi.org/10.21303/2461-4262.2016.00058.

Full text

Abstract:

The role of the optical transmitter is to generate the optical signal, impose the information bearing signal, and launch the modulated signal into the optical fiber. The semiconductor light sources are commonly used in state-of-the-art optical communication systems. Optical communication systems has become one of the important systems after the advent of telephone, internet, radio networks in the second half of the 20th century. The development of optical communication was caused primarily by the rapidly rising demand for Internet connectivity. Orthogonal frequency-division multiplexing (OFDM) belongs to a wide class of multicarrier modulation. Orthogonal frequency-division multiplexing has succeeded in a wide range of applications in the wireless communication domain from video/audio digital broadcasting to wireless local area networks (LANs). Although their very low loss compared to that of the wireless counterpart, optical systems still need renovation for spans commonly less than150 Km. In this paper advantages of optical orthogonal frequency division multiplexing in communications systems will explained.

APA, Harvard, Vancouver, ISO, and other styles

42

Xu, Tongyang, Hedaia Ghannam, and Izzat Darwazeh. "Practical Evaluations of SEFDM: Timing Offset and Multipath Impairments." Infocommunications journal, no. 4 (2018): 2–9. http://dx.doi.org/10.36244/icj.2018.4.1.

Full text

Abstract:

The non-orthogonal signal waveform spectrally efficient frequency division multiplexing (SEFDM) improves spectral efficiency at the cost of self-created inter carrier interference (ICI). As the orthogonal property, similar to orthogonal frequency division multiplexing (OFDM), no longer exists, the robustness of SEFDM in realistic wireless environments might be weakened. This work aims to evaluate the sensitivity of SEFDM to practical channel distortions using a professional experiment testbed. First, timing offset is studied in a bypass channel to locate the imperfection of the testbed and its impact on SEFDM signals. Then, the joint effect of a multipath frequency selective channel and additive white Gaussian noise (AWGN) is investigated in the testbed. Through practical experiments, we demonstrate the performance of SEFDM in realistic radio frequency (RF) environments and verify two compensation methods for SEFDM. Our results show first frequency-domain compensation works well in frequency non-selective channel conditions while time-domain compensation method is suitable for frequency selective channel conditions. This work paves the way for the application of SEFDM in different channel scenarios.

APA, Harvard, Vancouver, ISO, and other styles

43

Peng, Yaqiu, and Mingqi Li. "Discrete Fourier Transform-Based Block Faster-Than- Nyquist Transmission for 5G Wireless Communications." Applied Sciences 10, no. 4 (February 14, 2020): 1313. http://dx.doi.org/10.3390/app10041313.

Full text

Abstract:

Faster-than-Nyquist (FTN) signaling is regarded as a potential candidate for improving data rate and spectral efficiency of 5G new radio (NR). However, complex detectors have to be utilized to eliminate the inter symbol interference (ISI) introduced by time-domain packing and the inter carrier interference (ICI) introduced by frequency-domain packing. Thus, the exploration of low complexity transceiver schemes and detectors is of great importance. In this paper, we consider a discrete Fourier transform (DFT) block transmission for multi-carrier FTN signaling, i.e., DBT-MC-FTN. With the aid of DFTs/IDFTs and frequency domain windowing, time- and frequency domain packing can be implemented flexibly and efficiently. At the receiver, the inherent ISI and ICI can be canceled via a soft successive interference cancellation (SIC) detector. The effectiveness of the detector is verified by the simulation over the additive white Gaussian noise channel and the fading channel. Furthermore, based on the characteristics of the efficient architecture of DFT-MC-FTN, two pilot-aided channel estimation schemes, i.e., time-division-multiplexing DBT-MC-FTN symbol-level pilot, and frequency-division-multiplexing subcarrier-level pilot within the DBT-MC-FTN symbol, respectively, are also derived. Numerical results show that the proposed channel estimation schemes can achieve high channel estimation accuracy.

APA, Harvard, Vancouver, ISO, and other styles

44

Kim, J. Y., T. Hwang, and Y. H. You. "Blind frequency-offset tracking scheme for multiband orthogonal frequency division multiplexing using time-domain spreading." IET Communications 5, no. 11 (July 22, 2011): 1544–49. http://dx.doi.org/10.1049/iet-com.2010.0631.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Mohammed, Asaad, and Maher K. Mahmood Al-Azawi. "COMPARISON OF TIME AND TIME-FREQUENCY DOMAINS IMPULSIVE NOISE MITIGATION TECHNIQUES FOR POWER LINE COMMUNICATIONS." Journal of Engineering and Sustainable Development 27, no. 1 (January 1, 2023): 68–79. http://dx.doi.org/10.31272/jeasd.27.1.6.

Full text

Abstract:

Impulsive noise is one of the foremost situations in power line communications that degrades the performance of orthogonal frequency division multiplexing used for the power line communications channel. In this paper, a channel version of the broadband power line communications is assumed when evaluating the bit error rate performance. Three impulsive noise environments are assumed, namely heavily, moderately, and weakly disturbed. The well-known time domain mitigation techniques are tested first. These are clipping, blanking, and mixing clipping with blanking. The results of Matlab simulations show that these time-domain mitigation techniques don't significantly improve the bit error rate performance. A hybrid domain of time and frequency mitigation techniques are used to enhance the bit error rate performance. The Matlab simulation results show that this hybrid domain of time and frequency approach outperforms time domain nonlinearities and can largely improve the bit error rate performance. Signal-to-noise ratio gains of about 8 dB, 10 dB, and 10 dB are obtained for heavily, moderately, and weakly disturbed channels, respectively, using the domains of time and frequency mitigation technique at a bit error rate of when compared to the blanking time domain technique.

APA, Harvard, Vancouver, ISO, and other styles

46

Mishra, M., and J. Mattingly. "Convolution-based frequency domain multiplexing of SiPM readouts using the DRS4 digitizer." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 1025 (February 2022): 166116. http://dx.doi.org/10.1016/j.nima.2021.166116.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Xuping Zhang, Yuejiang Song, and Lidong Lu. "Time Division Multiplexing Optical Time Domain Reflectometry Based on Dual Frequency Probe." IEEE Photonics Technology Letters 24, no. 22 (November 2012): 2005–8. http://dx.doi.org/10.1109/lpt.2012.2217737.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

NAKAJIMA, A., D. GARG, and F. ADACHI. "Frequency-Domain Iterative Parallel Interference Cancellation for Multicode Spread-Spectrum MIMO Multiplexing." IEICE Transactions on Communications E91-B, no. 5 (May 1, 2008): 1531–39. http://dx.doi.org/10.1093/ietcom/e91-b.5.1531.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Kimura, S., K. Masui, Y. Takei, K. Mitsuda, N. Y. Yamasaki, R. Fujimoto, T. Morooka, and S. Nakayama. "Performance Measurement of the 8-Input SQUIDs for TES Frequency Domain Multiplexing." Journal of Low Temperature Physics 151, no. 3-4 (January 24, 2008): 946–51. http://dx.doi.org/10.1007/s10909-008-9771-0.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Oral, T., D. van Loon, R. Hou, A. C. T. Nieuwenhuizen, R. H. den Hartog, and B. J. van Leeuwen. "A Low-Power Algorithm for Baseband Feedback Used with Frequency Domain Multiplexing." Journal of Low Temperature Physics 167, no. 5-6 (January 27, 2012): 658–63. http://dx.doi.org/10.1007/s10909-012-0456-3.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!