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Статті в журналах з теми "Anti-jam"
Casabona, Mario M., and Murray W. Rosen. "Discussion of GPS Anti-Jam Technology." GPS Solutions 2, no. 3 (January 1999): 18–23. http://dx.doi.org/10.1007/pl00012752.
Повний текст джерелаFairhurst, Godred, and Tim Spracklen. "An anti-jam packet data satellite link." International Journal of Satellite Communications 7, no. 3 (July 1989): 201–7. http://dx.doi.org/10.1002/sat.4600070310.
Повний текст джерелаAriyanti, Ariyanti, Eni Masruriati, Tsani Imadahidayah, and Eka Nur Sulistianingsih. "Pemanfaatan kitosan dari cangkang kerang bulu (Anadara antiquata) sebagai pengawet ikan pari (Dasyatis sp.) dan udang vaname (Litopenaeus vannamei)." Riset Informasi Kesehatan 9, no. 1 (June 29, 2020): 12. http://dx.doi.org/10.30644/rik.v9i1.241.
Повний текст джерелаNemov, A. V., D. A. Nemov, D. L. Minh, S. A. Saveliev, and A. N. Plastikov. "Efficiency of the Miniature Anti-jam GNSS Antenna Array." Journal of the Russian Universities. Radioelectronics, no. 2 (June 5, 2018): 37–46. http://dx.doi.org/10.32603/1993-8985-2018-21-2-37-46.
Повний текст джерелаDhiancinantyan Windydaca Brata Putri and Ni Putu Aryati Suryaningsih. "EFEK EKSTRAK DAUN SENDOK (Plantago major L.) TERHADAP ERITEMA PADA MARMUT PUTIH BETINA (Guinea pig) OLEH RADIASI ALAT MODIFIKASI UV 04-08." Jurnal Ilmiah Medicamento 4, no. 1 (March 30, 2018): 1–12. http://dx.doi.org/10.36733/medicamento.v4i1.872.
Повний текст джерелаByarushengo, Denice, Rwaichi Minja, and Abraham Temu. "Lemongrass and Cinnamon Essential Oils as Vitamin C Preservatives and Flavour Enhancers in Jam." Tanzania Journal of Engineering and Technology 35, no. 1 (June 30, 2014): 46–53. http://dx.doi.org/10.52339/tjet.v35i1.468.
Повний текст джерелаMartynyuk, S. Ye, D. O. Vasylenko, F. F. Dubrovka, and A. G. Laush. "Novel microstrip antenna array for anti-jam satellite navigation system." Radioelectronics and Communications Systems 58, no. 3 (March 2015): 97–106. http://dx.doi.org/10.3103/s0735272715030012.
Повний текст джерелаFairhurst, G. "On-board processing for anti-jam packet data satcom services." Electronics & Communications Engineering Journal 4, no. 3 (1992): 115. http://dx.doi.org/10.1049/ecej:19920021.
Повний текст джерелаZhu, Zhou, Zhang Er-yang, and Lu Shu-jun. "A Kind of Cascade Anti-Jam Method for GPS Receiver." Procedia Engineering 23 (2011): 16–23. http://dx.doi.org/10.1016/j.proeng.2011.11.2458.
Повний текст джерелаAulia, Cindy Rizka. "PENGARUH WAKTU DAN PELARUT EDTA (Ethylenediaminetetraacetic Acid) PADA EKSTRAKSI FUKOIDAN DARI RUMPUT LAUT COKELAT Sargassum binderi Sonder." Inovasi Pembangunan : Jurnal Kelitbangan 8, no. 03 (December 6, 2020): 265. http://dx.doi.org/10.35450/jip.v8i03.211.
Повний текст джерелаДисертації з теми "Anti-jam"
Eng, Thomas. "ANTI-JAM PERFORMANCE OF SEVERAL DIVERSITY COMBINERS." International Foundation for Telemetering, 1997. http://hdl.handle.net/10150/609757.
Повний текст джерелаThe relative anti-jam (AJ) performance of several diversity combiners are investigated. The modulation is 8-ary frequency-shift-keying (FSK), the demodulation process consists of energy detection of the eight frequency bins at each hop and the subsequent combining of detector outputs. Three combiners are considered : the linear combiner, where the detector outputs of each hop (corresponding to the same frequency bin) are summed without any processing; the self-normalized combiner, where the eight detector outputs of any particular hop are normalized so that they add to unity; and the max-normalized combiner, where the eight detector outputs of any hop are divided by the maximum value among those eight outputs. Results indicate that under worst-case tone jamming, the selfnormalized combiner performs the best, the max-normalized combiner second best, and the linear combiner performs the worst among the three.
Kavvadias, Vasilios Christos. "Joint tactical anti-jam communications: a systems approach." Thesis, Monterey, California. Naval Postgraduate School, 1989. http://hdl.handle.net/10945/26032.
Повний текст джерелаFairhurst, Godred. "A study of error control techniques and the use of an enhanced X.25 LAPB protocol on a pseudo-random frequency-hopped anti-jam satellite link." Thesis, University of Aberdeen, 1987. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=129205.
Повний текст джерелаJelena, Nađpal. "Fitohemijski skrining i biološka aktivnost ekstrakata i tradicionalnih proizvoda od plodova divljih ruža (Rosa L.;Rosaceae)." Phd thesis, Univerzitet u Novom Sadu, Prirodno-matematički fakultet u Novom Sadu, 2017. https://www.cris.uns.ac.rs/record.jsf?recordId=104437&source=NDLTD&language=en.
Повний текст джерелаThe aim of presented doctoral thesis was investigation of phytochemical composition and biological activity of water and methanol extracts of fresh and air- dried rose hips, as well as purée and jam made according to traditional recipe of hips of six wild growing Rosa L. species: R. canina, R. dumalis, R. dumetorum, R. tomentosa, R. arvensis, and R. sempervirens. Examination of phytochemical composition included LC-MS/MS analysis of 64 selected phenolic compounds, quinic acid (organic acid) and three triterpenoids. Also, total phenolic and flavonoid contents, as well as vitamin C contents were determined spectrophotometrically. Biological activity evaluation of extracts of six Rosa species included in vitro investigation of antioxidant, anti- inflammatory, anti-acetylcholinesterase and cytotoxic activity. According to obtained results, fresh and air-dried rose hips, as well as their preserves present valuable source of vitamin C and phenolic compounds, especially ellagic acid, which was the most abundant examined phenolic compound. Furthermore, high concentration of ursolic acid was detected in some Rosa tomentosa and R. rumetorum extracts, while notable concentration of quinic acid was present in all examined extracts. Extracts of all examined species, apart from Rosa arvensis, showed considerable antioxidant activity in terms of radical scavenging ability, reduction potential and inhibition of lipid peroxidation. Moreover, extracts exhibited moderate anti- inflammatory activity by means of inhibition of the main arachidonic acid metabolites formed incyclooxygenase-1 (12-HHT, TXB2, PGE 2 ) and 12-lipoxygenase (12-HETE) pathway, especially prostaglandin E2 . Also, investigation of anti- cetylcholinesterase activity revealed moderate activity of extracts of all examined species. In addition, predominantly water extracts of fresh andair-dried rose hips, as well as purée of R. canina, R. tomentosa and R. sempervirens showed inhibitory activity toward HeLa, while R.sempervirens extracts also inhibited HT-29 cell growth. Presented results indicate significant potential of examined rose hips and their preserves for use as nutraceuticals and functional food.
Zorica, Mrkonjić. "Fitohemijska karakterizacija i biohemijska ispitivanja plodova vrsta roda Sorbus L. 1753 (Rosaceae, Maloideae) kao izvora prirodnih nutraceutika." Phd thesis, Univerzitet u Novom Sadu, Prirodno-matematički fakultet u Novom Sadu, 2017. https://www.cris.uns.ac.rs/record.jsf?recordId=104909&source=NDLTD&language=en.
Повний текст джерелаThe aim of presented PhD thesis was investigation of phytochemical composition and biological activity of water and methanol extracts of fresh and air-dried fruits, as well as jam, made according to traditional recipe, of fruits of four (one of them occurs in two forms) wild growing Sorbus L. species: S. aucuparia, S. domestica, S. torminalis f. torminalis, S. torminalis f. semitorminalis and S. intermedia. Examination of phytochemical composition included LC-MS/MS analysis of 44 selected phenolic compounds and quinic acid (organic acid). Also, total phenolic and flavonoid contents, as well as ascorbic acid content, were determined spectrophotometrically. Biological activity evaluation of extracts of Sorbus species included in vitro investigation of antioxidant, anti-acetylcholinesterase, antimicrobial and cytotoxic activity. According to obtained results, fresh and air-dried fruits, as well as jam present moderate source of phenolic compounds. Amongs examined phenolic acids protocatechuic and ferulic acids were the most abundant, and amongs investigated flavonoids amentoflavone and quercetin-3-O-glucoside wete present in noticeable amount. Furthermore, high concentration of quinic acid was present in all examined extracts. Extracts of all examined species showed moderate antioxidant activity in terms of radical scavenging ability, reduction potential and inhibition of lipid peroxidation. Also, investigation of anti-acetylcholinesterase activity revealed moderate activity only of extracts of S. aucuparia. Furthermore, examinated extracts of Sorbus species showedmoderate antimicrobial activity against Gram–positive bacteria, Staphylococcus aureus, and Gram-negative bacteria, Escherichia coli. In addition, water and methanol extracts of fresh and air-dried fruits of S.aucuparia showed inhibitory activity toward tumor (HeLa, MCF7, HT-29), and also non-tumor (MRC-5) cell lines. Presented results indicate significant biopotential of examined fruits of Sorbus species and support their use in food industry as functional food.
Li, Joy. "GPS interference mitigation for small UAV applications." Thesis, 2008. http://hdl.handle.net/2440/50719.
Повний текст джерелаThesis (M.Eng.Sc.) - University of Adelaide, School of Electrical and Electronic Engineering, 2008
Chang, Shon-Wei, and 張雄偉. "Anti-jam Design of Fine-time Synchronization Algorithms in FH Satellite Systems." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/25270764683389740517.
Повний текст джерела國立交通大學
電信工程研究所
86
In a frequency - hopped multiple access (FHMA) satellite communication system, the hopping clocks of the ground users must be synchronous with that of the transponder. This FH clock synchronization process is usually divided into two parts, namely, the coarse clock synchronization and fine - time synchronization. This thesis deals exclusively with the fine - time synchronization process. Because of the long round - trip delay between the ground users and the satellite, correct estimate of the clock timing error is made aboard the satellite and sent via the downlink to the ground users to adjust their carrier hop transition times. After a few closed - loop iterations, a ground user's signal arriving at the satellite receiver will be synchronous with the hop transition time of the dehopper. To carry out such a fine - time synchronization, a ground user would send a probe signal for a number of hop periods. Several estimation algorithms using the probe signal had been proposed. Among them, the so - called method F2,. which is based on an early - late filter technique to process the probe reponse, was shown to render the best overall performance. Since the satellite FHMA system is designed for military applications, it is necessary to examine the anti - jam capability of such a system. Unfortunately, the F2 estimator is far from robust against jamming. We suggest practical solutions to save this estimator.Performance analysis of various modified estimators is presented. Numerical examples using either analytical results or computer simulations are provided to study the behaviors of the proposed new estimators under various jamming threats. It is shown that, with proper design, fine - time synchronization using probe signals can be accomplished even in the presence of jamming.
張祖瑞. "Anti-Jam Performance of DFT-Based Acquisition Schemes for Frequency-Hopped Signals." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/14841945661067225950.
Повний текст джерела國立交通大學
電機學院碩士在職專班電信組
95
As we are entering the information age, the communication security has become a more important issue than ever. Military communication systems are faced with the electronic warfare (EW) threat in the digitized battlefield. Communication jamming is one of the most-encountered EW threat. It is well known that the spread spectrum communications have the anti-jam capability against intentional jamming. In this thesis, we first review some basics of the satellite communications. Examples for Ka band link budget analysis in the adverse environment are given. We propose three different DFT-based discrete acquisition schemes for the acquisition of the frequency-hopped signals. The acquisition process proceeds in both time and frequency domain. The proposed schemes make acquisition in just one period become possible. Mathematical expressions for the detection probability and false alarm probability using various acquisition schemes in the ideal AWGN channel (noise power perfectly known), the non-ideal AWGN channel(noise power is estimated), the non-ideal AWGN channel with broad-band noise jamming and partial-band noise jamming are derived. We also propose methods for the estimation and normalization of the noise and the noise-plus-jamming power in the jamming environment. The Debruijn sequence is adopted as the pseudo random hopping pattern generating sequence since it has a code length of power of 2. This allows an efficient computation for FFT algorithm. Finally, numerical results of the system performance for the aforementioned scenarios are presented. Besides, we also give numerical results using hopping patterns with a longer and a shorter period.
Книги з теми "Anti-jam"
Kavvadias, Vasilios Christos. Joint tactical anti-jam communications: A systems approach. Monterey, Calif: Naval Postgraduate School, 1989.
Знайти повний текст джерелаUnited States Government US Army. Training Circular TC 6-02. 21 Secure Mobile Anti-Jam Reliable Tactical-Terminal (SMART-T) Handbook July 2019. Independently Published, 2019.
Знайти повний текст джерелаЧастини книг з теми "Anti-jam"
Milstein, Laurence B. "An Introduction to Anti-Jam Performance of Spread Spectrum Communications." In Space Communication and Nuclear Scintillation, 418–49. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-017-5418-7_5.
Повний текст джерелаZhang, Xudong. "Application of Improve Subspace Projection Technique in of GNSS Space–Time Anti-Jam Receiver." In Lecture Notes in Electrical Engineering, 555–64. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-37398-5_51.
Повний текст джерелаJerne, Christina. "The syntax of social movements: jam, boxes and other anti-mafia assemblages." In Reassembling Activism, Activating Assemblages, 26–42. Routledge, 2020. http://dx.doi.org/10.4324/9780429320798-2.
Повний текст джерелаLin, Jan. "Introduction." In Taking Back the Boulevard, 1–16. NYU Press, 2019. http://dx.doi.org/10.18574/nyu/9781479809806.003.0001.
Повний текст джерелаFarhana, Nikhat. "Meticulous Endorsement of Black Seed and Jambolana: A Scientific Review." In Herbs and Spices - New Processing Technologies. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.99225.
Повний текст джерелаТези доповідей конференцій з теми "Anti-jam"
Cerasoli, Carmen, and James Dimarogonas. "Geographic-Based Satellite Anti-Jam Strategies." In 28th AIAA International Communications Satellite Systems Conference (ICSSC-2010). Reston, Virigina: American Institute of Aeronautics and Astronautics, 2010. http://dx.doi.org/10.2514/6.2010-8809.
Повний текст джерелаMartel, Cedric. "Low profile and anti-jam GPS array." In 2013 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting. IEEE, 2013. http://dx.doi.org/10.1109/aps.2013.6711268.
Повний текст джерелаZheng, Yue, Yikun Huang, and Yuanxun E. Wang. "Design of Small GPS Anti-Jam Antenna." In 2018 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting. IEEE, 2018. http://dx.doi.org/10.1109/apusncursinrsm.2018.8608862.
Повний текст джерелаDing, Wang, and Zhao Yi-Xuan. "Multi-Subchannel Spread Spectrum for Anti-jam Communications." In 2012 International Conference on Industrial Control and Electronics Engineering (ICICEE). IEEE, 2012. http://dx.doi.org/10.1109/icicee.2012.50.
Повний текст джерелаPoberezhskiy, Y. S., and G. Y. Poberezhskiy. "On adaptive robustness approach to Anti-Jam signal processing." In 2013 IEEE Aerospace Conference. IEEE, 2013. http://dx.doi.org/10.1109/aero.2013.6496827.
Повний текст джерелаFarahmand, Shahrokh, Alfonso Cano, and Georgios B. Giannakis. "Anti-jam distributed MIMO decoding using wireless sensor networks." In ICASSP 2008 - 2008 IEEE International Conference on Acoustics, Speech and Signal Processing. IEEE, 2008. http://dx.doi.org/10.1109/icassp.2008.4518095.
Повний текст джерелаCole, Chad A., Chowdhury Shahriar, and T. Charles Clancy. "An Anti-jam Communications Technique via Spatial Hiding Precoding." In 2014 IEEE Military Communications Conference (MILCOM). IEEE, 2014. http://dx.doi.org/10.1109/milcom.2014.88.
Повний текст джерелаKOLBA, DEAN, DAVID MVELROY, and WILLIAM CUMMINGS. "Lightweight EHF satellites for augmentation of anti-jam communications." In 14th International Communication Satellite Systems Conference and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1992. http://dx.doi.org/10.2514/6.1992-1811.
Повний текст джерелаKeller, Steven D., Steven J. Weiss, Jeffrey A. Maloney, Do-Hoon Kwon, Ramakrishna Janaswamy, and John Morley. "Design Considerations for a Wearable Anti-Jam GPS Antenna." In 2018 2nd URSI Atlantic Radio Science Meeting (AT-RASC). IEEE, 2018. http://dx.doi.org/10.23919/ursi-at-rasc.2018.8471663.
Повний текст джерелаMeagher, Christopher J., Randall B. Olsen, and Robert C. Ferro. "Semi-automated Rotman lens design focusing on anti-jam performance." In 2010 IEEE International Conference on Wireless Information Technology and Systems (ICWITS). IEEE, 2010. http://dx.doi.org/10.1109/icwits.2010.5611915.
Повний текст джерелаЗвіти організацій з теми "Anti-jam"
Keller, Steven D. Anti-Jam GPS Antennas for Wearable Dismounted Soldier Navigation Systems. Fort Belvoir, VA: Defense Technical Information Center, June 2016. http://dx.doi.org/10.21236/ad1011921.
Повний текст джерелаZoltowski, Michael D. NWV Topic 20 Jam-Proof Area Deniable Propagation: Anti-Jam Protection for GPS via Robust Efficient Space-Time Adaptive Processing. Fort Belvoir, VA: Defense Technical Information Center, October 2000. http://dx.doi.org/10.21236/ada384716.
Повний текст джерела