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Готові списки джерел за темами / Nulling-antenna

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Добірка наукової літератури з теми "Nulling-antenna"

Автор: Grafiati

Опубліковано: 30 травня 2022

Оновлено: 31 липня 2025

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Статті в журналах з теми "Nulling-antenna"

1

Bucciarelli, M., D. Pastina, D. Cristallini, M. Sedehi, and P. Lombardo. "Integration of Frequency Domain Wideband Antenna Nulling and Wavenumber Domain Image Formation for Multi-Channel SAR." International Journal of Antennas and Propagation 2016 (2016): 1–13. http://dx.doi.org/10.1155/2016/2834904.

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A Multichannel Synthetic Aperture Radar (M-SAR) exploiting an antenna nulling based Electronic Counter-Counter Measures (ECCM) technique shall be able to cancel the effects of noise-like interferences over the collected SAR data. Since SAR systems often work with wide bandwidths to provide high resolution images, ECCM technique must account for the presence of wideband interference signal. In this paper we consider a wideband antenna nulling technique based on space-frequency adaptive nulling and we propose an integration of the WB antenna nulling scheme within the focusing algorithm for M-SAR

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2

Acharya, Om Prakash, Amalendu Patnaik, and Sachendra N. Sinha. "Null Steering in Failed Antenna Arrays." Applied Computational Intelligence and Soft Computing 2011 (2011): 1–9. http://dx.doi.org/10.1155/2011/692197.

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Antenna array pattern nulling is desirable in order to suppress the interfering signals. But in large antenna arrays, there is always a possibility of failure of some elements, which may degrade the radiation pattern with an increase in side lobe level (SLL) and removal of the nulls from desired position. In this paper a correction procedure is introduced based on Particle Swarm Optimization (PSO) which maintains the nulling performance of the failed antenna array. Considering the faulty elements as nonradiating elements, PSO reoptimizes the weights of the remaining radiating elements to resha

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3

Dufort, E. "An optical subarray antenna having antenna nulling applications." IEEE Transactions on Antennas and Propagation 35, no. 6 (1987): 643–51. http://dx.doi.org/10.1109/tap.1987.1144164.

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4

Ding, Tongyu, Shaoqing Zhang, Liang Zhang, and Yanhui Liu. "Smart Cylindrical Dome Antenna Based on Active Frequency Selective Surface." International Journal of Antennas and Propagation 2017 (2017): 1–14. http://dx.doi.org/10.1155/2017/5901625.

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In this paper, we proposed a beamforming antenna, which is realized using an omnidirectional antenna in the center surrounded by a cylindrical smart dome. The smart dome is made of 16 active frequency selective surface columns of which the amplitude and phase response can be continuously tuned by varying the bias voltages of the employed varactors. Thus, the performance of the proposed antenna could achieve higher gain, better nulling level, and more agility than many switch methods-based cylindrical reconfigurable antennas. Moreover, in order to overcome the unavailable analytical synthesis c

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5

Gong, Yanyun, Ling Wang, Rugui Yao, and Zhaolin Zhang. "A Robust Method to Suppress Jamming for GNSS Array Antenna Based on Reconstruction of Sample Covariance Matrix." International Journal of Antennas and Propagation 2017 (2017): 1–12. http://dx.doi.org/10.1155/2017/9764283.

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The Global Navigation Satellite System (GNSS) receiver is vulnerable to active jamming, which results in imprecise positioning. Therefore, antijamming performance of the receiver is always the key to studies of satellite navigation system. In antijamming application of satellite navigation system, if active jamming is received from array antenna main-lobe, main-lobe distortion happens when the adaptive filtering algorithm forms main-lobe nulling. A robust method to suppress jamming for satellite navigation by reconstructing sample covariance matrix without main-lobe nulling is proposed in this

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6

Georgiadis, Apostolos, Ana Collado, and Almudena Suarez. "Pattern Nulling in Coupled Oscillator Antenna Arrays." IEEE Transactions on Antennas and Propagation 55, no. 5 (2007): 1267–74. http://dx.doi.org/10.1109/tap.2007.895631.

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7

Ерохин, А. А. "Синтез "нулей" в диаграмме направленности частотно-независимой антенной решетки". Письма в журнал технической физики 47, № 7 (2021): 35. http://dx.doi.org/10.21883/pjtf.2021.07.50797.18469.

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Анотація:

A method for radiation pattern nulling of a frequency-invariant antenna array is proposed in the paper. Numerical experiments are carried out to determine the characteristics of the proposed method, a comparison is made with the existing wideband beamspace method.

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8

Aksoy, Ertugrul, and Erkan Afacan. "Planar antenna pattern nulling using differential evolution algorithm." AEU - International Journal of Electronics and Communications 63, no. 2 (2009): 116–22. http://dx.doi.org/10.1016/j.aeue.2007.11.006.

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9

Castella, F. R., and J. R. Kuttler. "Optimised array antenna nulling with phase-only control." IEE Proceedings F Radar and Signal Processing 138, no. 3 (1991): 241. http://dx.doi.org/10.1049/ip-f-2.1991.0031.

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10

Zheng, Xiao Zhe, Yu Hao Liu, and Cui Gai Lv. "Research on Anti-Jamming Algorithm Based on Beidou Satellite Navigation System." Applied Mechanics and Materials 380-384 (August 2013): 4128–31. http://dx.doi.org/10.4028/www.scientific.net/amm.380-384.4128.

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Анотація:

According to the four array elements of Beidou satellite navigation model as the research object, put forward a kind of Compass satellite navigation signal model construction method, and using Matlab software to build the satellite navigation signal system model . Based on the power inversion principle, try to use the recursive least squares (RLS) algorithm for getting the power inversion Optimum weights, compared and evaluated in terms of this performance. The results show that the power inversion based on RLS algorithm can make the antenna array in the direction of interference to automatica

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Більше джерел

Дисертації з теми "Nulling-antenna"

1

Maesto, Tony V. (Tony Vu) 1973. "Nulling performance on antenna patterns using multiple null constraints vs. derivative constraints." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/84209.

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2

Ghani, Sarfraz M. "Improving the Performance of Wireless Systems via Selective Interference Nulling and Adaptive Medium Access Control Design." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/34041.

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Escalating demands for high performance wireless systems requires the confluence of smart communication methods, network protocols and ongoing advances in fabrication technologies, in order to bring smaller form factor mobile handsets to market. On par with these trends, this thesis focuses on two main areas, namely, Multiple Antenna Systems and Adaptive MAC Design to improve wireless system performance. The first part of this research work presents a mathematical framework for characterizing the performance of cellular mobile radio systems equipped with smart antennas at the mobile handset

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3

Швець, Валеріян Анатолійович, та Тетяна Вікторівна Мелешко. "Напрями забезпечення доступності і цілісності інформації глобальних навігаційних супутникових систем". Thesis, RS Global Sp. z O.O. Warsaw, Poland, 2020. http://er.nau.edu.ua/handle/NAU/41256.

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Анотація:

Based on the analysis of reports and literature on the vulnerability of global navigation satellite systems, the robot presents a developed threat model and an intruder model for navigation information. Using the developed models, organizational and technical measures to protect information are determined. Directions for improving consumer equipment to jamming are given. Organizational measures for protecting against jamming are described.

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4

Johnson, Sandra Gomulka. "Antenna array output power minimization using steepest descent adaptive algorithm." [Tampa, Fla.] : University of South Florida, 2004. http://purl.fcla.edu/fcla/etd/SFE0000561.

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5

Wang, Hsiao-Sheng, and 汪效聖. "Realization of a Two-Dimensional Array Array Antenna using Robust Multiple Nulling Method." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/59111045641706431263.

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碩士<br>元智大學<br>通訊工程學系<br>97<br>In this paper, a multiple null algorithm that can be adjust the number, width and depth of multiple nulls in according with the requirements is presented for the improvement of the interference cancellation capability of two dimensional array antennas. The Howells-Applebaum algorithm, Eigen value decomposition (EVD) and principal component methods are employed to robustly simplify the computation of inverse interference covariance matrix and determine the optimal weighting matrix of the multiple null digital beam former (DBF). If there is no jamming occurred, the

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Книги з теми "Nulling-antenna"

1

DeMinco, N. Automated steerable nulling antenna processor (SNAP) model. U.S. Dept. of Commerce, National Telecommunications and Information Administration, 1989.

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2

United States. National Telecommunications and Information Administration., ed. Automated steerable nulling antenna processor (SNAP) model. U.S. Dept. of Commerce, National Telecommunications and Information Administration, 1989.

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Частини книг з теми "Nulling-antenna"

1

Van Luyen, Tong, Phan Dang Hung, Hoang Manh Kha, and Nguyen Van Cuong. "Antenna Array Pattern Nulling via Convex Optimization." In Ad Hoc Networks. Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-55993-8_5.

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2

Shi, Rong. "Main Beam Pointing and Null Constraint Optimization for Satellite Navigation Nulling Antenna." In Lecture Notes in Electrical Engineering. Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0029-5_25.

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3

Bélisle, C., L. Mason, and B. Felstead. "Design of an Opto-Electronic Beam Nulling Network for a Multiple-Beam Antenna." In Applications of Photonic Technology. Springer US, 1995. http://dx.doi.org/10.1007/978-1-4757-9247-8_28.

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4

Feng, Tianming, Yuquan Shu, and Zhihui Yao. "SIR Meta Distribution Analysis for Multi-antenna Multi-user Networks with Interference Nulling." In Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering. Springer Nature Switzerland, 2025. https://doi.org/10.1007/978-3-031-86203-8_14.

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5

Kaviya K R and Deepa S. "Improved Linearly Constrained Minimum Variance Algorithm for 5G Communications System." In Advances in Parallel Computing. IOS Press, 2021. http://dx.doi.org/10.3233/apc210090.

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Beamforming is a process formulated to produce the radiated beam patterns of the antennas by completely building up the processed signals in the direction of the desired terminals and cancelling beams of interfering signals. Adaptive beamforming is a key technology of smart antenna. The core is to obtain optimum weights of the antenna array by some adaptive beamforming algorithms and finally adjust the main lobe to focus on the arriving direction of the desired signal as well as suppressing the interfering signal. There are several beamforming algorithms that includes Linearly Constrained Mini

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6

Amin, Moeness. "Adaptive Interference Nulling and Direction of Arrival Estimation in GPS Dual-Polarized Antenna Receiver." In Adaptive Signal Processing in Wireless Communications. CRC Press, 2008. http://dx.doi.org/10.1201/9781420046021.ch14.

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Тези доповідей конференцій з теми "Nulling-antenna"

1

Kozick, Richard J., Fikadu T. Dagefu, Brian M. Sadler, and Justin Kong. "Nulling and Sectorized Jamming with Distributed Compact Antenna Arrays." In 2024 IEEE International Symposium on Antennas and Propagation and INC/USNC‐URSI Radio Science Meeting (AP-S/INC-USNC-URSI). IEEE, 2024. http://dx.doi.org/10.1109/ap-s/inc-usnc-ursi52054.2024.10686660.

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2

Erokhin, Alexey A., Evgeniy R. Gafarov, Yury P. Salomatov, Stanislav V. Polenga, Anton M. Aleksandrin, and Roman O. Ryazantsev. "Horizon Nulling Backfire Helix Antenna for Interference-Resistant GNSS Applications." In 2024 IEEE 25th International Conference of Young Professionals in Electron Devices and Materials (EDM). IEEE, 2024. http://dx.doi.org/10.1109/edm61683.2024.10615086.

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3

Hussain, Moayyed A., and Kai-Bor Yu. "Phase-only nulling for transmit antenna." In SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, edited by Franklin T. Luk. SPIE, 1999. http://dx.doi.org/10.1117/12.367656.

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4

Chen, Yikai, Shiwen Yang, Gang Li, and Zaiping Nie. "Adaptive nulling in time-modulated antenna arrays." In 2008 8th International Symposium on Antennas, Propagation and EM Theory. IEEE, 2008. http://dx.doi.org/10.1109/isape.2008.4735314.

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5

Hsieh, Sung-Nien, and Tah-Hsiung Chu. "A four-element reflecto-nulling antenna array." In 2006 Asia-Pacific Microwave Conference. IEEE, 2006. http://dx.doi.org/10.1109/apmc.2006.4429822.

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6

Cheng, George G., Yong Zhu, Gene Wu, and Jan Grzesik. "An agile reconfigurable beam antenna with nulling capability." In 2013 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting. IEEE, 2013. http://dx.doi.org/10.1109/aps.2013.6711294.

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7

LeComte, William L., Scott R. Henion, and Peter A. Schultz. "Adaptive wideband optical nulling for an antenna system." In OE/LASE '94, edited by Brian M. Hendrickson. SPIE, 1994. http://dx.doi.org/10.1117/12.177406.

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8

Sung-Nien Hsieh and Tah-Hsiung Chu. "A linear retro- and reflecto-nulling antenna array." In 2008 Asia Pacific Microwave Conference. IEEE, 2008. http://dx.doi.org/10.1109/apmc.2008.4957958.

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9

Godara, Lal C., and M. R. Sayyah Jahromi. "An optimized sector nulling technique for broadband antenna array." In 2008 2nd International Conference on Signal Processing and Communication Systems (ICSPCS 2008). IEEE, 2008. http://dx.doi.org/10.1109/icspcs.2008.4813689.

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10

Bucciarelli, Marta, Matteo Sedehi, and Pierfrancesco Lombardo. "Wideband adaptive antenna nulling schemes for synthetic Aperture Radar." In 2008 IEEE Radar Conference. IEEE, 2008. http://dx.doi.org/10.1109/radar.2008.4720827.

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Звіти організацій з теми "Nulling-antenna"

1

DeMinco, Nicholas. Automated Steerable Nulling Antenna Processor (SNAP) Model. Institute for Telecommunication Sciences, 1989. https://doi.org/10.70220/fv441t26.

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2

LJR EL SEGUNDO CA. Simulation and Evaluation of an Antenna Polarization Nulling Processor. Defense Technical Information Center, 1995. http://dx.doi.org/10.21236/ada299581.

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