Увійти

Готові списки джерел за темами / Radio frequency modulation / Статті в журналах

Щоб переглянути інші типи публікацій з цієї теми, перейдіть за посиланням: Radio frequency modulation.

Статті в журналах з теми "Radio frequency modulation"

Автор: Grafiati

Опубліковано: 4 червня 2021

Оновлено: 6 вересня 2023

Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями

Оберіть тип джерела:

Ознайомтеся з топ-50 статей у журналах для дослідження на тему "Radio frequency modulation".

Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.

Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.

Переглядайте статті в журналах для різних дисциплін та оформлюйте правильно вашу бібліографію.

1

Yang, Kai, Zhanshan Sun, Ruiqi Mao, Yi Lin, Yi Liu, Qiang An, and Yunqi Fu. "Wideband Rydberg atom-based receiver for amplitude modulation radio frequency communication." Chinese Optics Letters 20, no. 8 (2022): 081203. http://dx.doi.org/10.3788/col202220.081203.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

2

Cho, Chihyun, Hyunji Koo, Jae-Yong Kwon, Joo-Gwang Lee, and Tae-Weon Kang. "Measurement of Analog Modulation Index with a Calibrated Radio Frequency Attenuator." Journal of Electromagnetic Engineering and Science 21, no. 2 (April 30, 2021): 87–94. http://dx.doi.org/10.26866/jees.2021.21.2.87.

Повний текст джерела

Анотація:

This paper presents a method for the accurate and traceable measurement of the analog modulation index. A calibrated step attenuator was used as the main apparatus because it has a higher dynamic range and lower uncertainty than a spectrum analyzer or an oscilloscope. In amplitude modulation (AM), the modulation index is obtained from the amplitude difference between the carrier and the first sideband, as in the conventional method. The resolution and calibration uncertainties of the step attenuator were propagated to the measurement uncertainty of the modulation index. The uncertainty produce

Стилі APA, Harvard, Vancouver, ISO та ін.

3

Bello, N., and F. O. Edeko. "Design of a Robust Orthogonal Frequency Division Multiplexing (OFDM) Transceiver for a Cognitive Radio Testbed." March 2022 6, no. 1 (March 2022): 13–27. http://dx.doi.org/10.36263/nijest.2022.01.0301.

Повний текст джерела

Анотація:

Primarily, a Cognitive Radio (CR) resolves the problem of spectrum scarcity and underutilization. However, it should also attain a good throughput and Quality of Service (QoS) as its objectives. These requirements are solely dependent on the modulation used. Though single carrier modulations such as Gaussian Minimum Shift Keying (GMSK) are highly spectral efficient, they are not robust to frequency selective fading. An implementation of multicarrier modulation supports high spectral efficiency and resistance to multipath fading. Therefore, in this paper, there is a comprehensive how-to-guide o

Стилі APA, Harvard, Vancouver, ISO та ін.

4

Volkov, A. A., V. A. Kuzyukov, and M. S. Morozov. "MODEM OPTIONS FOR DIGITAL RADIO COMMUNICATION SYSTEMS." World of Transport and Transportation 15, no. 6 (December 28, 2017): 48–56. http://dx.doi.org/10.30932/1992-3252-2017-15-6-4.

Повний текст джерела

Анотація:

[For the English abstract and full text of the article please see the attached PDF-File (English version follows Russian version)].ABSTRACT New versions of the modulator and demodulator (modem) for the digital railway radio communication system GSM-R have been developed, which increase the noise immunity twofold. To realize «cos» and «sin» blocks, a phase modulator is used, two coherent quadrature demodulators are connected to its output in parallel. It is shown that «cos» block generates the signal cos [msinφ(t)], which is transferred to the operating frequency of the transmitter by means of

Стилі APA, Harvard, Vancouver, ISO та ін.

5

Han, Huangpu, Fan Yang, Chenghao Liu, Zhengfang Wang, Yunpeng Jiang, Guangyue Chai, Shuangchen Ruan, and Bingxi Xiang. "High-Performance Electro-Optical Mach–Zehnder Modulators in a Silicon Nitride–Lithium Niobate Thin-Film Hybrid Platform." Photonics 9, no. 7 (July 19, 2022): 500. http://dx.doi.org/10.3390/photonics9070500.

Повний текст джерела

Анотація:

We analyzed a Mach–Zehnder electro-optical modulator based on a silicon nitride strip–loaded waveguide on 0.5 μm thick x-cut lithium niobate thin film. The optical and radio frequency parameters for two different modulator structures (Type I: packaged with 2 μm thick SiO2 and Type II: unpackaged) were simulated, calculated, and optimized. The Optical parameters included the single-mode conditions, effective indices, the separation distance between the electrode edge and the Si3N4-strip-loaded edge, optical power distribution, bending loss, optical field distribution, and half-wave voltage. The

Стилі APA, Harvard, Vancouver, ISO та ін.

6

Shantha Selva Kumari, R., and K. Seyatha. "Performance evaluation of hybrid modulation techniques for high speed radio over fiber communication system." International Journal of Modern Physics C 30, no. 09 (September 2019): 1950070. http://dx.doi.org/10.1142/s0129183119500700.

Повний текст джерела

Анотація:

In Radio over Fiber (RoF) technology, the optical network capacity is integrated with the wireless network. The main objective of this work is to enhance the performance behavior of optical fiber communication system in terms of BER, Received Power and Q-Factor. The proposed combined modulation technologies, such as Pulse Amplitude Frequency Modulation (PAFM), Differential Phase Shift Keying Amplitude Modulation (DPSKA), Offset Quadrature Phase Shift Keying Amplitude Modulation (OQPSKA), Quadrature Amplitude Frequency Modulation (QAFM), Frequency Phase Modulation (FPM) and Pulse Amplitude Phas

Стилі APA, Harvard, Vancouver, ISO та ін.

7

Luo, Junshan, Hao Wang, Fanggang Wang, and Shilian Wang. "Secure Spatial Modulation via Radio Frequency Mirrors." IEEE Transactions on Vehicular Technology 69, no. 8 (August 2020): 9168–73. http://dx.doi.org/10.1109/tvt.2020.2999917.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

8

Bulyuk, A. N. "Radio-frequency electrooptic modulation in optical fibers." Soviet Journal of Quantum Electronics 22, no. 10 (October 31, 1992): 948–50. http://dx.doi.org/10.1070/qe1992v022n10abeh003638.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

9

Bai, Jiang Ling, Li Bin Zhong, Wen Hai Xu, and Jian Lin. "Research on Optical Signal Carrier Transmission Technology." Advanced Materials Research 1022 (August 2014): 193–96. http://dx.doi.org/10.4028/www.scientific.net/amr.1022.193.

Повний текст джерела

Анотація:

This paper studies the single-sideband RF signals in the optical carrier side than the problem. RF signals modulated optical carrier OSSB + C modulation index is usually small, leading edge modulated carrier radio frequency signal generated by the optical carrier ratio is not ideal. A design scheme based on three-arm and four-arm MZM MZM optimized optical carrier single sideband radio frequency signal containing the edge ratio. By adjusting the DC bias voltage of the modulator can control the carrier side than the light signal. For any modulation index, are able to make the optical carrier sin

Стилі APA, Harvard, Vancouver, ISO та ін.

10

Xiang Jingfeng, 项静峰, 王利国 Wang Liguo, 任伟 Ren Wei, 李唐 Li Tang, 吕德胜 Lü Desheng, and 刘亮 Liu Liang. "Frequency Noise Suppression of Single-Frequency Laser with Radio-Frequency Modulation." Chinese Journal of Lasers 44, no. 5 (2017): 0501009. http://dx.doi.org/10.3788/cjl201744.0501009.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

11

Chen, Shichuan, Kunfeng Qiu, Shilian Zheng, Qi Xuan, and Xiaoniu Yang. "Radio–Image Transformer: Bridging Radio Modulation Classification and ImageNet Classification." Electronics 9, no. 10 (October 9, 2020): 1646. http://dx.doi.org/10.3390/electronics9101646.

Повний текст джерела

Анотація:

Radio modulation classification is widely used in the field of wireless communication. In this paper, in order to realize radio modulation classification with the help of the existing ImageNet classification models, we propose a radio–image transformer which extracts the instantaneous amplitude, instantaneous phase and instantaneous frequency from the received radio complex baseband signals, then converts the signals into images by the proposed signal rearrangement method or convolution mapping method. We finally use the existing ImageNet classification network models to classify the modulatio

Стилі APA, Harvard, Vancouver, ISO та ін.

12

Paramonov, A. A., V. M. Nguyen, and M. T. Nguyen. "Multi-task neural network for solving the problem of recognizing the type of QAM and PSK modulation under parametric a priori uncertainty." Russian Technological Journal 11, no. 4 (August 1, 2023): 49–58. http://dx.doi.org/10.32362/2500-316x-2023-11-4-49-58.

Повний текст джерела

Анотація:

Objectives. Automatic modulation recognition of unknown signals is an important task for various fields oftechnology such as radio control, radio monitoring, and identification of interference and sources of radio emission. The paper aims to develop a method for recognizing the types of signal modulation under conditions of parametric a priori uncertainty, including the uncertainty of carrier frequency- and initial signal phase values. An additional task consists in estimating the offset values of the carrier frequency or signal phase at the initial stage of the recognition process.Methods. A

Стилі APA, Harvard, Vancouver, ISO та ін.

13

CANSIZ, Mustafa. "Radio Frequency Energy Harvesting with Frequency Shift Keying Modulation Technique." DÜMF Mühendislik Dergisi 10, no. 2 (June 20, 2019): 531–36. http://dx.doi.org/10.24012/dumf.561336.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

14

Shum, Chi Man, and Edward A. Whittaker. "Determination of radio-frequency phase in harmonic frequency modulation spectroscopy." Applied Optics 30, no. 27 (September 20, 1991): 3799. http://dx.doi.org/10.1364/ao.30.003799.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

15

Zhang, Ruixue, Yiming Gong, Matthew W. Day, Dong Sun, and Steven T. Cundiff. "Radio frequency polarization modulation based on an optical frequency comb." Review of Scientific Instruments 91, no. 8 (August 1, 2020): 083111. http://dx.doi.org/10.1063/5.0016256.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

16

Yu, Longqiang, Rong Wang, Lin Lu, Yong Zhu, Chuanxin Wu, Baofu Zhang, and Peizhang Wang. "Stable radio frequency dissemination by simple hybrid frequency modulation scheme." Optics Letters 39, no. 18 (September 3, 2014): 5255. http://dx.doi.org/10.1364/ol.39.005255.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

17

Razmi, Shirin, and Naser Parhizgar. "Adaptive resources assignment in OFDM-based cognitive radio systems." International Journal of Electrical and Computer Engineering (IJECE) 9, no. 3 (June 1, 2019): 1935. http://dx.doi.org/10.11591/ijece.v9i3.pp1935-1943.

Повний текст джерела

Анотація:

Spectrum efficiency of orthogonal frequency division multiplexing (OFDM)-based cognitive radio (CR) systems can be improved by adaptive resources allocation. In resources allocation, transmission resources such as modulation level and transmission power are adaptively assigned based on channel variations. The goal of this paper is maximize the total transmission rate of secondary user (SU). Hence, we investigate adaptive power and modulation allocation to achieve this purpose. For power allocation, we investigate optimal and conventional methods and then introduce a novel suboptimal algorithm

Стилі APA, Harvard, Vancouver, ISO та ін.

18

Huang, Qingchuan, and Tetsuya Kawanishi. "Precise RF Phase Measurement by Optical Sideband Generation Using Mach–Zehnder Modulators." Photonics 10, no. 3 (March 17, 2023): 324. http://dx.doi.org/10.3390/photonics10030324.

Повний текст джерела

Анотація:

A novel radio frequency (RF) phase measurement method that uses optical modulation was proposed. The mathematical model of Mach–Zehnder modulator (MZM) characterization was reviewed. By measuring the output sideband power of the optical modulator, the phase difference of the electric signals fed to the modulator was experimentally measured, and picosecond-level accuracies were achieved. This technique is expected to be useful for radio-over-fiber-based antenna array systems.

Стилі APA, Harvard, Vancouver, ISO та ін.

19

Waters, C. L., T. K. Yeoman, M. D. Sciffer, P. Ponomarenko, and D. M. Wright. "Modulation of radio frequency signals by ULF waves." Annales Geophysicae 25, no. 5 (June 4, 2007): 1113–24. http://dx.doi.org/10.5194/angeo-25-1113-2007.

Повний текст джерела

Анотація:

Abstract. The ionospheric plasma is continually perturbed by ultra-low frequency (ULF; 1–100 mHz) plasma waves that are incident from the magnetosphere. In this paper we present a combined experimental and modeling study of the variation in radio frequency of signals propagating in the ionosphere due to the interaction of ULF wave energy with the ionospheric plasma. Modeling the interaction shows that the magnitude of the ULF wave electric field, e, and the geomagnetic field, B0, giving an e×B0 drift, is the dominant mechanism for changing the radio frequency. We also show how data from high f

Стилі APA, Harvard, Vancouver, ISO та ін.

20

Luong, Kevin Q. T., Wei Gu, Foad Fereidoony, Lap Yeung, Zhi Yao, and Yuanxun Ethan Wang. "Radio Frequency Precession Modulation-Based Magnetic Field Sensors." IEEE Access 10 (2022): 3756–65. http://dx.doi.org/10.1109/access.2021.3140142.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

21

Piccardo, Marco, Michele Tamagnone, Benedikt Schwarz, Paul Chevalier, Noah A. Rubin, Yongrui Wang, Christine A. Wang, et al. "Radio frequency transmitter based on a laser frequency comb." Proceedings of the National Academy of Sciences 116, no. 19 (April 24, 2019): 9181–85. http://dx.doi.org/10.1073/pnas.1903534116.

Повний текст джерела

Анотація:

Since the days of Hertz, radio transmitters have evolved from rudimentary circuits emitting around 50 MHz to modern ubiquitous Wi-Fi devices operating at gigahertz radio bands. As wireless data traffic continues to increase, there is a need for new communication technologies capable of high-frequency operation for high-speed data transfer. Here, we give a proof of concept of a compact radio frequency transmitter based on a semiconductor laser frequency comb. In this laser, the beating among the coherent modes oscillating inside the cavity generates a radio frequency current, which couples to t

Стилі APA, Harvard, Vancouver, ISO та ін.

22

Sobacchi, Emanuele, Yuri Lyubarsky, Andrei M. Beloborodov, and Lorenzo Sironi. "Filamentation of fast radio bursts in magnetar winds." Monthly Notices of the Royal Astronomical Society 511, no. 4 (January 29, 2022): 4766–73. http://dx.doi.org/10.1093/mnras/stac251.

Повний текст джерела

Анотація:

ABSTRACT Magnetars are the most promising progenitors of fast radio bursts (FRBs). Strong radio waves propagating through the magnetar wind are subject to non-linear effects, including modulation/filamentation instabilities. We derive the dispersion relation for modulations of strong waves propagating in magnetically dominated pair plasmas focusing on dimensionless strength parameters a0 ≲ 1, and discuss implications for FRBs. As an effect of the instability, the FRB-radiation intensity develops sheets perpendicular to the direction of the wind magnetic field. When the FRB front expands outsid

Стилі APA, Harvard, Vancouver, ISO та ін.

23

Hussaini, A. S., I. T. E. Elfergani, J. Rodriguez, and R. A. Abd-Alhameed. "Efficient multi-stage load modulation radio frequency power amplifier for green radio frequency front end." IET Science, Measurement & Technology 6, no. 3 (2012): 117. http://dx.doi.org/10.1049/iet-smt.2011.0127.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

24

Kim, Boram, and Kazuo Nakazato. "Dual Data Pulse Width Modulator for Radio Frequency Identification Biosensor Signal Modulation." Japanese Journal of Applied Physics 52, no. 4S (April 1, 2013): 04CE12. http://dx.doi.org/10.7567/jjap.52.04ce12.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

25

Yonghao Zhu, Yonghao Zhu, Hua Li Hua Li, Wenjian Wan Wenjian Wan, Li Gu Li Gu, Tao Zhou Tao Zhou, Stefano Barbieri Stefano Barbieri, and and Juncheng Cao and Juncheng Cao. "Beat note analysis and spectral modulation of terahertz quantum cascade lasers with radio frequency injection." Chinese Optics Letters 15, no. 1 (2017): 011404–11408. http://dx.doi.org/10.3788/col201715.011404.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

26

Carreira, Robson Ribeiro, Joaquim José Barroso de Castro, José Edimar Barbosa Oliveira, André Paim Gonçalves, and Alessandro Roberto dos Santos. "Photonic-assisted microwave frequency measurement towards cognitive radio." Revista Brasileira de Aplicações de Vácuo 39, no. 3 (December 28, 2020): 211–17. http://dx.doi.org/10.17563/rbav.v39i3.1185.

Повний текст джерела

Анотація:

Cognitive radio frequency (RF) systems can be seen through an OODA (observe, orient, decide and act) loop, and electronic warfare (EW) can be used in some of these stages, namely the observe and the act. Instantaneous microwave frequency measurement (IFM) systems can contribute to cognitive RF technology taking the real world to the data world. In an OODA loop, IFM can be arranged as in the observe stage. Here we have proposed an IFM device that allows the adjustment of the directional couplers coupling coefficients, optical fiber lengths, modulation index and modulation formats, which makes t

Стилі APA, Harvard, Vancouver, ISO та ін.

27

Sobacchi, Emanuele, Yuri Lyubarsky, Andrei M. Beloborodov, and Lorenzo Sironi. "Self-modulation of fast radio bursts." Monthly Notices of the Royal Astronomical Society 500, no. 1 (October 20, 2020): 272–81. http://dx.doi.org/10.1093/mnras/staa3248.

Повний текст джерела

Анотація:

ABSTRACT Fast radio bursts (FRBs) are extreme astrophysical phenomena entering the realm of non-linear optics, a field developed in laser physics. A classical non-linear effect is self-modulation. We examine the propagation of FRBs through the circumburst environment using the idealized setup of a monochromatic linearly polarized GHz wave propagating through a uniform plasma slab of density N at distance R from the source. We find that self-modulation occurs if the slab is located within a critical radius Rcrit ∼ 1017(N/102 cm−3)(L/1042 erg s−1) cm, where L is the isotropic equivalent of the F

Стилі APA, Harvard, Vancouver, ISO та ін.

28

Dal Cin, Sandro, Florian Pilat, Aleš Konečný, Nikola Opačak, Gottfried Strasser, and Benedikt Schwarz. "Coherent control of transverse modes in semiconductor laser frequency combs via radio-frequency injection." Applied Physics Letters 121, no. 7 (August 15, 2022): 071106. http://dx.doi.org/10.1063/5.0098474.

Повний текст джерела

Анотація:

Increasing the output power of semiconductor laser frequency combs, while maintaining a single-lobe far-field characteristic is of great interest for mid-infrared sensing applications. Broadening of the ridge waveguide represents the most common approach for power scaling, however, the excitement of higher-order transverse modes often limits general applicability. Here, we demonstrate that the coherent control of the longitudinal laser modes enables control over the transverse modes of a quantum cascade laser. Modulating the laser in a frequency range 60 ± 3 MHz above the free-running laser be

Стилі APA, Harvard, Vancouver, ISO та ін.

29

HULA, IHOR, and OLEKSIY POLIKAROVSKYKH. "STUDY NEUR NETWORKS FOR SOFTWARE DEFINED RADIO CONTROL." Herald of Khmelnytskyi National University 303, no. 6 (December 2021): 31–36. http://dx.doi.org/10.31891/2307-5732-2021-303-6-31-36.

Повний текст джерела

Анотація:

The scientific article is devoted to the issues of SDR system control. Software Defined Radio is a system designed for software control of information transmission processes in a radio communication channel. Recognition of digital modulation types is used, which automatically classifies the type of digital modulation of the received signal. The following issues are covered in the article: the analysis of existing approaches in the task of automatic recognition of types of digital modulation is carried out; the analysis and classification of informative features in the task of automatic recogni

Стилі APA, Harvard, Vancouver, ISO та ін.

30

Kareem, Marwa M., Sameer A. S. Lafta, Hadi Fakhir Hashim, Raed Khalid Al-Azzawi, and Adnan Hussein Ali. "Analyzing the BER and optical fiber length performances in OFDM RoF links." Indonesian Journal of Electrical Engineering and Computer Science 23, no. 3 (September 1, 2021): 1501. http://dx.doi.org/10.11591/ijeecs.v23.i3.pp1501-1509.

Повний текст джерела

Анотація:

Radio over fiber (RoF) can be assessed as a system of most convenient combination of optical fiber and radio signals. The technique of orthogonal frequency division multiplexing (OFDM) considers as a data distribution over a huge number of carriers having spaced from each other with specific frequencies at overlap bands. Hence incorporates OFDM with the optical fiber, OFDM-RoF system can be increased the modulation RF access capacity besides high-speed data transmission, it considers a broadband communication trend of the current and future applications specifically for 5G mobile. The optical

Стилі APA, Harvard, Vancouver, ISO та ін.

31

Kador, Lothar, Tatiana Latychevskaia, Alois Renn, and Urs P. Wild. "Radio-frequency Stark effect modulation of single-molecule lines." Journal of Luminescence 86, no. 3-4 (April 2000): 189–94. http://dx.doi.org/10.1016/s0022-2313(00)00162-9.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

32

Esepkina, N. A., A. P. Lavrov, and S. V. Dmitriev. "Acoustooptical processor for radio signals with discrete frequency modulation." Technical Physics Letters 23, no. 1 (January 1997): 54–56. http://dx.doi.org/10.1134/1.1261616.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

33

Cho, Herman, Susanne Pfenninger, Jörg Forrer, and Arthur Schweiger. "Radio-frequency-driven electron-spin-echo-envelope-modulation spectroscopy." Chemical Physics Letters 180, no. 3 (May 1991): 198–206. http://dx.doi.org/10.1016/0009-2614(91)87140-7.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

34

Quyen, Nguyen Xuan. "On the Study of a Quadrature DCSK Modulation Scheme for Cognitive Radio." International Journal of Bifurcation and Chaos 27, no. 09 (August 2017): 1750135. http://dx.doi.org/10.1142/s0218127417501358.

Повний текст джерела

Анотація:

The past decade has witnessed a boom of wireless communications which necessitate an increasing improvement of data rate, error-rate performance, bandwidth efficiency, and information security. In this work, we propose a quadrature (IQ) differential chaos-shift keying (DCSK) modulation scheme for the application in cognitive radio (CR), named CR-IQ-DCSK, which offers the above improvement. Chaotic signal is generated in frequency domain and then converted into time domain via an inverse Fourier transform. The real and imaginary components of the frequency-based chaotic signal are simultaneousl

Стилі APA, Harvard, Vancouver, ISO та ін.

35

Ujang, Febrizal, Teguh Firmansyah, Purnomo S. Priambodo, and Gunawan Wibisono. "Irregular Shifting of RF Driving Signal Phase to Overcome Dispersion Power Fading." Photonics 6, no. 4 (October 12, 2019): 104. http://dx.doi.org/10.3390/photonics6040104.

Повний текст джерела

Анотація:

The main problem with the radio-over-fiber (RoF) link is the decrease in the recovered radio frequency (RF) power due to the chromatic dispersion of the fiber known as dispersion power fading. One of the methods for dealing with dispersion power fading is to use the optical single sideband (OSSB) modulation scheme. The OSSB modulation scheme can be generated by biasing the dual-drive Mach–Zehnder modulator (DD-MZM) to the quadrature bias point (QBP) and shifting the RF drive signal phase (θ) by 90°, which is called the regular θ. However, the OSSB modulation scheme only overcomes dispersion po

Стилі APA, Harvard, Vancouver, ISO та ін.

36

Yang, Wei Dong, Li Li, and Kai Peng. "Realization of Low Frequency Wakeup in Tire Encoded Radio Frequency Identification System." Applied Mechanics and Materials 556-562 (May 2014): 2895–98. http://dx.doi.org/10.4028/www.scientific.net/amm.556-562.2895.

Повний текст джерела

Анотація:

In car tires coded identification system, radio frequency technology plays a vital role, the key to radio frequency signals transmitted process is waveform modulation. The key of adjusting the waveform is how to match its resistor and capacitor easily. In the paper their resistance and capacitance values are optimized by using the simulation software (Protues) to simulate the transmitted waveform, and based on matching results the optimized physical models are produced. The actual test results agree well with the simulation results. The method of simulation tests can save the resources effecti

Стилі APA, Harvard, Vancouver, ISO та ін.

37

Han, Cheng Hao, Ye Ren, and Bing Shang. "Wireless Identification System Based on Radio Frequency Technique." Advanced Materials Research 433-440 (January 2012): 6760–63. http://dx.doi.org/10.4028/www.scientific.net/amr.433-440.6760.

Повний текст джерела

Анотація:

Using radio frequency technique, the reader machine will load call signal into 70MHz radio frequency, and send to response machine wirelessly. The call signal will be sent to the control of response machine by circuit coupling, demodulation, voltage comparator. The control will analyze and identify the call signal, send the stored 4-bit binary code back to the reader machine by transmitting modulation circuit, and display the detail of response machine.

Стилі APA, Harvard, Vancouver, ISO та ін.

38

Unchenko, I. V., and A. A. Emelyanov. "Specific Features of Designing Microwave Photonic Receiving and Transmitting Channels of Onboard Systems for Communication, Radar and Radio Monitoring." Journal of the Russian Universities. Radioelectronics 26, no. 1 (March 7, 2023): 58–67. http://dx.doi.org/10.32603/1993-8985-2023-26-1-58-67.

Повний текст джерела

Анотація:

Introduction. Designers of modern on-board systems for communication, radar, and radio monitoring face the problem of improving their qualitative characteristics, including the operating frequency, instantaneous bandwidth, receiver sensitivity, and electromagnetic compatibility. In addition, the dimensions, weight, and power of such systems, as well their cost, should be minimized. However, the current semiconductor microwave electronics has reached its limits in terms of frequency and dynamic characteristics. A possible solution consists in the implementation of microwave photonic transmissio

Стилі APA, Harvard, Vancouver, ISO та ін.

39

Wei, Zifei. "Research on STM32-Based Signal Conditioning System Measurement System." Highlights in Science, Engineering and Technology 42 (April 7, 2023): 9–17. http://dx.doi.org/10.54097/hset.v42i.7050.

Повний текст джерела

Анотація:

The measurement of the signal modulation system is a vital part of channel transmission signal technology, which has a very important position in the signal communication quality assurance system. With the development of radio communications in modern radio technology, the research of AM and FM signal modulation measurement methods has become an important element in this field of research. This research is a signal modulation system using an STM32F407 microcontroller as the control core. The hardware of the system is mainly composed of a coherent demodulation circuit system and a comparator ju

Стилі APA, Harvard, Vancouver, ISO та ін.

40

Chen, Chien-Sheng, Chyuan-Der Lu, Ho-Nien Shou, and Le-Wei Lin. "Baseband Transceiver Design of a High Definition Radio FM System Using Joint Theoretical Analysis and FPGA Implementation." International Journal of Antennas and Propagation 2014 (2014): 1–9. http://dx.doi.org/10.1155/2014/580479.

Повний текст джерела

Анотація:

Advances in wireless communications have enabled various technologies for wireless digital communication. In the field of digital radio broadcasting, several specifications have been proposed, such as Eureka-147 and digital radio mondiale (DRM). These systems require a new spectrum assignment, which incurs heavy cost due to the depletion of the available spectrum. Therefore, the in-band on-channel (IBOC) system has been developed to work in the same band with the conventional analog radio and to provide digital broadcasting services. This paper discusses the function and algorithm of the high

Стилі APA, Harvard, Vancouver, ISO та ін.

41

Zakharchenko, Vladimir, and Alexander Khoperskov. "Scheme features of radio pulse gating for radar measurements." ITM Web of Conferences 30 (2019): 11011. http://dx.doi.org/10.1051/itmconf/20193011011.

Повний текст джерела

Анотація:

The model of a radio pulse stroboscopic converter consisting of a mixer and a narrowband filter tuned to the difference frequency of the carrier signals is considered. We demonstrate that the measurement of the phase structure of the input signals can be made at low frequency by amplitude methods by changing the phase both in the channel of the gating radio pulses and in the low frequency channel. The radio-pulse gating scheme goes into a phase-sensitive mode when the system clock frequency is synchronized with the second harmonic of the difference frequency, however, in this case, a parasitic

Стилі APA, Harvard, Vancouver, ISO та ін.

42

Liu, Bing, and Xinhong Hao. "Research on Anti-Frequency Sweeping Jamming Method for Frequency Modulation Continuous Wave Radio Fuze Based on Wavelet Packet Transform Features." Applied Sciences 12, no. 17 (August 30, 2022): 8713. http://dx.doi.org/10.3390/app12178713.

Повний текст джерела

Анотація:

Frequency modulation continuous wave (FMCW) radio fuze is widely used in military equipment, due to its excellent range and anti-jamming ability. However, the widespread use of radio fuze jammers on modern battlefields poses a serious threat to fuzes. In this study, a classification method of targeting and sweeping frequency jamming signals of FMCW radio fuze based on wavelet packet transform features is proposed, which improves the anti-jamming ability of fuze. The wavelet packet transform of the output signal of the radio fuze detector is used to form a feature vector, which is fed into a su

Стилі APA, Harvard, Vancouver, ISO та ін.

43

Avdeev, Vladimir B., S. I. Babusenko, V. Yu Gorovoi, A. I. Katrusha, N. I. Kozachek, S. N. Panychev, D. V. Senkevich, and A. A. Chaplygin. "An Active Nonlinear Radio-Range Station with Frequency and Pulse Modulation for Measuring Distances to Radio-Frequency Sources." Telecommunications and Radio Engineering 65, no. 9 (2006): 847–56. http://dx.doi.org/10.1615/telecomradeng.v65.i9.80.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

44

Lin, Wei-Lun. "Orthogonal Time/Frequency Multiplexed Modulation Families for Software Defined Radio." Recent Advances in Communications and Networking Technology 5, no. 1 (December 29, 2016): 43–48. http://dx.doi.org/10.2174/2215081105666160726165552.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

45

CANSIZ, Mustafa. "Radio Frequency Energy Harvesting with Phase Shift Keying Modulation Technique." DÜMF Mühendislik Dergisi 11, no. 1 (March 27, 2020): 105–11. http://dx.doi.org/10.24012/dumf.639282.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

46

Bykov, Yu N. "Noise Immunity of a Radio-Control System with Frequency Modulation." Telecommunications and Radio Engineering 66, no. 8 (2007): 729–39. http://dx.doi.org/10.1615/telecomradeng.v66.i8.30.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

47

Jachura, Michał, Jan Szczepanek, Wojciech Wasilewski, and Michał Karpiński. "Measurement of radio-frequency temporal phase modulation using spectral interferometry." Journal of Modern Optics 65, no. 3 (October 17, 2017): 262–67. http://dx.doi.org/10.1080/09500340.2017.1387676.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

48

Fulda, P., D. Voss, C. Mueller, L. F. Ortega, G. Ciani, G. Mueller, and D. B. Tanner. "Alignment sensing for optical cavities using radio-frequency jitter modulation." Applied Optics 56, no. 13 (May 1, 2017): 3879. http://dx.doi.org/10.1364/ao.56.003879.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

49

Tiwari, V., K. Makita, M. Arino, M. Morita, T. Crozes, E. Bellet-Amalric, S. Kuroda, H. Boukari, and L. Besombes. "Radio-frequency stress-induced modulation of CdTe/ZnTe quantum dots." Journal of Applied Physics 127, no. 23 (June 21, 2020): 234303. http://dx.doi.org/10.1063/5.0011124.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

50

Ciobanu, A. A., D. D. Brown, P. J. Veitch, and D. J. Ottaway. "Mode matching error signals using radio-frequency beam shape modulation." Applied Optics 59, no. 31 (October 28, 2020): 9884. http://dx.doi.org/10.1364/ao.404646.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Ми пропонуємо знижки на всі преміум-плани для авторів, чиї праці увійшли до тематичних добірок літератури. Зв'яжіться з нами, щоб отримати унікальний промокод!