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Artykuły w czasopismach na temat "Doppler spread"
Benani, Abdelmoumen, Andre Carr i Martin Quenneville. "Doppler spread technique". IEEE Vehicular Technology Magazine 4, nr 1 (marzec 2009): 78–86. http://dx.doi.org/10.1109/mvt.2008.931621.
Pełny tekst źródłaDang, Qun, i Xiao Li Lei. "Doppler Frequency Shift Tolerance Extension in Burst Spread Spectrum Communication System". Advanced Materials Research 443-444 (styczeń 2012): 237–40. http://dx.doi.org/10.4028/www.scientific.net/amr.443-444.237.
Pełny tekst źródłaKrasny, L., H. Arslan, D. Koilpillai i S. Chennakeshu. "Doppler spread estimation in mobile radio systems". IEEE Communications Letters 5, nr 5 (maj 2001): 197–99. http://dx.doi.org/10.1109/4234.922758.
Pełny tekst źródłaKO, Y. C. "Doppler Spread Estimation in Mobile Communication Systems". IEICE Transactions on Communications E88-B, nr 2 (1.02.2005): 724–28. http://dx.doi.org/10.1093/ietcom/e88-b.2.724.
Pełny tekst źródłaHoward, S. J., i K. Pahlavan. "Doppler spread measurements of indoor radio channel". Electronics Letters 26, nr 2 (1990): 107. http://dx.doi.org/10.1049/el:19900074.
Pełny tekst źródłaHines, Colin O. "The Doppler spread theory and parameterization revisited". Journal of Atmospheric and Solar-Terrestrial Physics 66, nr 11 (lipiec 2004): 949–56. http://dx.doi.org/10.1016/j.jastp.2004.02.005.
Pełny tekst źródłaBaddour, K. E., i N. C. Beaulieu. "Robust Doppler spread estimation in nonisotropic fading channels". IEEE Transactions on Wireless Communications 4, nr 6 (listopad 2005): 2677–82. http://dx.doi.org/10.1109/twc.2005.858362.
Pełny tekst źródłaFrigyes, I., B. G. Molnár, R. Vallet, Z. Herczku i Z. Bodnár. "Doppler spread characteristics of satellite personal communication channels". International Journal of Satellite Communications 19, nr 3 (maj 2001): 251–62. http://dx.doi.org/10.1002/sat.685.
Pełny tekst źródłaOkada, Minoru, Hideaki Takayanagi i Heiichi Yamamoto. "Array antenna assisted doppler spread compensator for OFDM". European Transactions on Telecommunications 13, nr 5 (wrzesień 2002): 507–12. http://dx.doi.org/10.1002/ett.4460130511.
Pełny tekst źródłaHuang, Pengda, Dinesh Rajan i Joseph Camp. "An Autoregressive Doppler Spread Estimator for Fading Channels". IEEE Wireless Communications Letters 2, nr 6 (grudzień 2013): 655–58. http://dx.doi.org/10.1109/wcl.2013.091113.130593.
Pełny tekst źródłaRozprawy doktorskie na temat "Doppler spread"
Eggen, Trym H. 1963. "Underwater acoustic communication over Doppler spread channels". Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/42768.
Pełny tekst źródłaMalachias, Nickolaos. "Doppler shift and spread study for ionospherically propagated signals". Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1994. http://handle.dtic.mil/100.2/ADA284610.
Pełny tekst źródłaWen, Hui. "Comparison and Evaluation of Doppler Spread Estimation Algorithms in WCDMA". Thesis, KTH, Kommunikationsteori, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-152226.
Pełny tekst źródłaI ett kommunikationssystem baserat p WCDMA kan egenskaperna hos radiotransmissionskanalernapverkas starkt av mobilens eller omgivningens rrelser.Estimering av Doppler spridningen r drfr av stor betydelse eftersom den r nrabeslktad med mobilens hastighet och den kan ocks anvndas fr att karakteriseraden snabba fdning i radiokanalen. Sledes kan estimat av Dopplerspridning ha ettbrett anvndningsomrde och forskningen om detta mne har varit intesiv. Mngaalgoritmer fr estimatering av Doppler spridning har freslagits i litteraturen. Idenna rapport, dessa algoritmer r indelade i fyra kategorier och analysen utfrsbde med avseende p prestanda och implementerbarhet. Simuleringar r utfrdamed Rayleigh fading och Rician modeller med olika hastigheter hos mobilen,och olika signal till brus frhllanden. Simuleringar har ocks gjorts fr olika vrdenav Ricianfaktorn och vinkel fr inkommande signal. Vidare har den berkningsmssigakomplexiteten av varje algoritm analyserats. Utifrn simuleringsresultathar de bakomliggande orsakerna till de olika algoritmernas prestatandadiskuterats. Dopplerspridningsestimat med Mosers metod (korrelation baseradestimator) visar det bsta resultatet bland dessa fyra estimator med avseendep skattningsnoggrannhet. Denna metod har ven frhllandevis lg berkningskomplexitetvilket gr den implementeringsvnlig.
Fofanah, Ibrahim, i Wannaw Assegu. "Delay Spread Characterization of the Aeronautical Channel". International Foundation for Telemetering, 2012. http://hdl.handle.net/10150/581653.
Pełny tekst źródłaRadio transmission channel influences greatly the quality of transmitted voice and data signal in terms of data rate and robustness. This degradation is as a result of many factors, notable amongst them are having multiple replica of the transmitted signal at the receiver (multipath), changes of frequency as a result of the movement of the aircraft (Doppler shift) and noise. This paper characterizes the scattered components of the aeronautical channel in terms of delay spread. Geometric representation is used to derive expressions for the maximum delay spread using the 2-ray model and the three dimensional model of the scattered path. Furthermore, the delay and Doppler frequencies are described as a function of the horizontal distance to the specular reflection point between a ground station and a test article. The simulated results are compared to measured data of related articles and the value of the maximum delay spread is compared with the proposed intersymbol guard band for Orthogonal Frequency Division Multiplexing (OFDM) in the Integrated Network Enhanced Telemetry (iNET) program to see if this proposition can be adapted to the aeronautical channel.
Peng, Ziqi. "Performance and Complexity Comparison of Doppler Spread Estimation for WCDMA Systems". Thesis, KTH, Kommunikationsteori, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-152225.
Pełny tekst źródłaEstimatering av en mobils hastighet i form av Dopplerspridning har ett brett spektrum av tillmpningar i cellulra kommunikationssystem ssom fr yttningen avmobiler mellan celler, kanaltilldelningsschema, adaptiv sndning, eektstyrning,etc. En stor mngd algoritmer fr estimering av Dopplerspriding har frslagitsi litteraturen, men det r ovanligt med heltckande jmfrelser mellan med dessaalgoritmer. Drfr r det av stor betydelse att jmfra och utvrdera resultaten avbentliga algoritmer inom ramen fr samma simuleringsvertyg.I denna rapport anvnds upplnken fr WCDMA fr utvrdering av fyra olikatyper av algoritmer fr estimering av Dopplerspridning. Metriker fr utvrderingenr prestanda och implementeringsvnlighet. Bde Rayleigh och Rician fdningskanalmodeller har utvrderas, samt eekten av mobilens hastighet, signaltill brus frhllande, Rician faktor och infallsvinkel i ppet flt scenario. Dessutomhar den berkningsmssiga komplexiteten analyseras fr att utvrdera den praktiskaanvndbarheten i riktiga system.
Scaife, Bradley J. "DOPPLER SHIFTED SPREAD SPECTRUM CARRIER RECOVERY USING REAL-TIME DSP TECHNIQUES". International Foundation for Telemetering, 1998. http://hdl.handle.net/10150/607365.
Pełny tekst źródłaIn any satellite communication, the Doppler shift associated with the satellite’s position and velocity must be calculated in order to determine the carrier frequency. If the satellite state vector is unknown then some estimate must be formed of the Doppler-shifted carrier frequency. One elementary technique is to examine the signal spectrum and base the estimate on the dominant spectral component. If, however, the carrier is spread (as in most satellite communications) this technique may fail unless the chip rate-to-data rate ratio (processing gain) associated with the carrier is small. In this case, there may be enough spectral energy to allow peak detection against a noise background. In this paper, we present a method to estimate the frequency (without knowledge of the Doppler shift) of a spread-spectrum carrier assuming a small processing gain and binary-phase shift keying (BPSK) modulation. Our method relies on a simple, averaged discrete Fourier transform along with peak detection. We provide simulation results indicating the accuracy of this method. In addition, we will describe an all-digital hardware design based around a Motorola DSP56303 and high-speed A/D which implements this technique in real-time. The hardware design is to be used in NMSU’s implementation of NASA’s demand assignment, multiple access (DAMA) service.
Widodo, Slamet. "Wind and Doppler Shift Compensation for Spread Spectrum Sound-based Positioning System". Kyoto University, 2013. http://hdl.handle.net/2433/180518.
Pełny tekst źródła0048
新制・課程博士
博士(農学)
甲第17901号
農博第2024号
新制||農||1017(附属図書館)
学位論文||H25||N4797(農学部図書室)
30721
京都大学大学院農学研究科地域環境科学専攻
(主査)教授 近藤 直, 准教授 小川 雄一, 教授 飯田 訓久
学位規則第4条第1項該当
Landon, David. "DOPPLER BANDWIDTH CHARACTERIZATION OF ARTM CHANNEL SOUNDING DATA". International Foundation for Telemetering, 1999. http://hdl.handle.net/10150/608760.
Pełny tekst źródłaData from ARTM channel sounding test flights is examined to characterize the dynamic channel behavior of aeronautical telemetry channels. The dynamic behavior is characterized using the Doppler power spectrum. The width of the Doppler power spectrum is the Doppler bandwidth of the channel which indicates the required bandwidth of adaptive detection techniques such as adaptive equalization, adaptive modulation, adaptive channel selection and adaptive error control coding. Data collected from ARTM Flight 11 suggest a Doppler bandwidth exceeding 6.7 Hz for the channel, but greater accuracy and resolution will only be possible with more data.
Jian-zhong, Qi, Gong Yan i Song Peng. "Realization of Fast Acquisition for Spread Spectrum Signal Based on FFT". International Foundation for Telemetering, 2011. http://hdl.handle.net/10150/595763.
Pełny tekst źródłaAcquisition based on Fast Fourier Transform (FFT) can acquire Pseudo-random code phase quickly and improve the performance of the satellite navigation receivers. In the paper Real-time receiver adopts the FPGA to realize the function of FFT and uses DSP processor to control the implementation process of Acquisition. For increasing the sensitivity of Acquisition incoherent accumulation were used in the process. Also, in the paper we have discussed the process method for decreasing the negative influence of signal power changes and carrier's Doppler frequency.
Landon, David. "PARAMETRIC ESTIMATION OF THE SCATTERING FUNCTION FOR ARTM CHANNEL SOUNDING DATA". International Foundation for Telemetering, 2000. http://hdl.handle.net/10150/608249.
Pełny tekst źródłaParameterized data from ARTM channel sounding test flights are used to derive a parameter-based estimate of the scattering function. The Doppler bandwidth and Doppler spread, important measures of channel dynamics, can be estimated from such a scattering function. Data collected from ARTM Flight 11 suggest that the Doppler bandwidth is larger than 6.7 Hz. Even for very small collections of parameterized data, surprising agreement is shown to non-parametric scattering function estimates. This confirms modeling assumptions and offers a way to achieve significant reductions of storage requirements.
Książki na temat "Doppler spread"
Eggen, Trym H. Underwater acoustic communication over Doppler spread channels. Woods Hole, Mass: Woods Hole Oceanographic Institution, 1997.
Znajdź pełny tekst źródłaNational Institute of Standards and Technology (U.S.), red. Characterization of a residential fire sprinkler using phase Doppler interferometry. Gaithersburg, MD: U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 2000.
Znajdź pełny tekst źródłaCzęści książek na temat "Doppler spread"
Weik, Martin H. "Doppler spread". W Computer Science and Communications Dictionary, 454. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_5520.
Pełny tekst źródłaWelch, Thad B., i Rodger E. Ziemer. "Simulation of a DSSS/MCM System in a Doppler Spread Channel". W Multi-Carrier Spread-Spectrum, 219–26. Boston, MA: Springer US, 1997. http://dx.doi.org/10.1007/978-1-4615-6231-3_26.
Pełny tekst źródłaNagai, N., M. Okada, M. Saito i H. Yamamoto. "Array Antenna Assisted Doppler Spread Compensator with Vehicle Speed Estimator for OFDM Receiver". W Multi-Carrier Spread-Spectrum, 299–306. Dordrecht: Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-94-017-0502-8_34.
Pełny tekst źródłaOkada, Minoru, Hideaki Takayanagi i Heiichi Yamamoto. "Array Antenna Assisted Doppler Spread Compensator for OFDM". W Multi-Carrier Spread-Spectrum & Related Topics, 337–44. Boston, MA: Springer US, 2002. http://dx.doi.org/10.1007/978-1-4757-3569-7_36.
Pełny tekst źródłaRobertson, Patrick, i Stefan Kaiser. "Doppler Spread Analysis and Simulation for Multi-Carrier Mobile Radio and Broadcast Systems". W Multi-Carrier Spread Spectrum & Related Topics, 279–86. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/978-1-4615-4463-0_32.
Pełny tekst źródłaZiemer, Rodger E., i Thaddeus B. Welch. "MCM-DSSS with DPSK Modulation and Equal Gain Combining in Delay and Doppler-Spread Rician Fading". W Multi-Carrier Spread Spectrum & Related Topics, 99–108. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/978-1-4615-4463-0_11.
Pełny tekst źródłaJeong, Haeseong, i Heung-Gyoon Ryu. "Efficient Doppler Spread Compensation with Frequency Domain Equalizer and Turbo Code". W Communications in Computer and Information Science, 9–18. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-27186-1_2.
Pełny tekst źródłaManzini, E., N. A. McFarlane i C. McLandress. "Middle Atmosphere Simulations with the ECHAM4 Model: Sensitivity to the Doppler Spread Gravity Wave Parameterization". W Gravity Wave Processes, 367–81. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-642-60654-0_25.
Pełny tekst źródłaMayr, Hans G., J. G. Mengel, C. O. Hines, K. L. Chan i N. F. Arnold. "Modeling the Seasonal Cycles and Equatorial Oscillations with a Parameterization of the Doppler Spread Gravity Wave Theory". W Gravity Wave Processes, 257–74. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-642-60654-0_18.
Pełny tekst źródłaMcFarlane, N., C. McLandress i S. Beagley. "Seasonal Simulations with the Canadian Middle Atmosphere Model: Sensitivity to a combination of orographic and Doppler Spread Parameterizations of Gravity Wave Drag". W Gravity Wave Processes, 351–66. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-642-60654-0_24.
Pełny tekst źródłaStreszczenia konferencji na temat "Doppler spread"
"Session TA2b: Communications under doppler spread". W 2010 44th Asilomar Conference on Signals, Systems and Computers. IEEE, 2010. http://dx.doi.org/10.1109/acssc.2010.5757560.
Pełny tekst źródłaGao Yuan, Chen Wei, Xie Tao i Long Biqi. "Doppler spread estimation for nonRayleigh fading channel". W 2009 4th IEEE Conference on Industrial Electronics and Applications (ICIEA). IEEE, 2009. http://dx.doi.org/10.1109/iciea.2009.5138373.
Pełny tekst źródłaYudnikov, Alexander, Dmitriy Zabirov, Vladimir Lyashev i Mikhail Kirichenko. "Doppler Spread Impact Minimization via Terminal Sensors Usage". W 2020 IEEE International Black Sea Conference on Communications and Networking (BlackSeaCom). IEEE, 2020. http://dx.doi.org/10.1109/blackseacom48709.2020.9234964.
Pełny tekst źródłaTao, Jun, Jingxian Wu i Chengshan Xiao. "Doppler Spread Estimation for Broadband Wireless OFDM Systems". W IEEE GLOBECOM 2007-2007 IEEE Global Telecommunications Conference. IEEE, 2007. http://dx.doi.org/10.1109/glocom.2007.545.
Pełny tekst źródłaGomes, Joao, i Victor Barroso. "Time-reversed communication over Doppler-spread underwater channels". W Proceedings of ICASSP '02. IEEE, 2002. http://dx.doi.org/10.1109/icassp.2002.5745242.
Pełny tekst źródłaGomes i Barroso. "Time-reversed communication over Doppler-spread underwater channels". W IEEE International Conference on Acoustics Speech and Signal Processing ICASSP-02. IEEE, 2002. http://dx.doi.org/10.1109/icassp.2002.1005280.
Pełny tekst źródłaCao, Mingzheng, Hongya Ge, Hong Zhang i Ali Abdi. "Parametric Doppler Spread Estimation in Mobile Fading Channels". W MILCOM 2007 - IEEE Military Communications Conference. IEEE, 2007. http://dx.doi.org/10.1109/milcom.2007.4455007.
Pełny tekst źródłaSharif, Zaiton, i Ahmad Zuri Sha'ameri. "Estimation of the Doppler spread and time delay spread for the wireless communication channel". W 2010 International Conference on Computer Applications and Industrial Electronics (ICCAIE). IEEE, 2010. http://dx.doi.org/10.1109/iccaie.2010.5735119.
Pełny tekst źródłaZheng, Min, i Kemal Ozdemir. "GPS-aided Doppler spread estimation in a mobile system". W 2012 26th Biennial Symposium on Communications (QBSC). IEEE, 2012. http://dx.doi.org/10.1109/qbsc.2012.6221377.
Pełny tekst źródłaCannizzaro, Rocco Claudio, Paolo Banelli i Geert Leus. "Adaptive Channel Estimation for OFDM Systems with Doppler spread". W 2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications. IEEE, 2006. http://dx.doi.org/10.1109/spawc.2006.346485.
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