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Your search keyword '"Ultra wideband technology -- Research"' showing total 278 results
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278 results on '"Ultra wideband technology -- Research"'

2. A novel multilayer UWB antenna on LTCC

Author

Ya-Qiong Zhang, Yong-Xin Guo, and Mook Seng Leong

Subjects
Antennas (Electronics) -- Design and construction, Impedance (Electricity) -- Measurement, Microwave wiring -- Usage, Ultra wideband technology -- Research, Business, Computers, Electronics, Electronics and electrical industries
Published
2010

6. Wideband Photometry of Saturn in 2008-2009

Author

Schmude, Jr., Richard

Subjects
Ultra wideband technology -- Research, Brightness (Photometry) -- Measurement, Photometry -- Methods -- Technology application, Saturn (Planet) -- Observations -- Spectra, Technology application, Science and technology
Abstract

ABSTRACT A total of 52 brightness measurements of Saturn were made during its 2008-2009 apparition. (An apparition is the time interval between when the planet is in conjunction with the [...]

Published
2010

7. Ultrawideband antennas for magnetic resonance imaging navigator techniques

Author

Schwarz, U., Thiel, F., Seifert, F., Stephan, R., and Hein, M.A.

Subjects
Antennas (Electronics) -- Design and construction, Magnetic resonance imaging -- Analysis, Ultra wideband technology -- Research, Business, Computers, Electronics, Electronics and electrical industries
Published
2010

8. Post-time-reversed MIMO ultrawideband transmission scheme

Author

Xiaofei Liu, Bing-Zhong Wang, Shaoqiu Xiao, and Shengjian Lai

Subjects
MIMO communications -- Analysis, Ultra wideband technology -- Research, Quality of service, Business, Computers, Electronics, Electronics and electrical industries
Published
2010

10. Experimental characterization of UWB on-body radio channel in indoor environment considering different antennas

Author

Sani, A., Alomainy, A., Palikaras, G., Nechayev, Y., Hao, Y., Parini, C., and Hall, P. S.

Subjects
Antennas (Electronics) -- Design and construction, Cardiovascular system -- Models, Cardiopulmonary system -- Models, Ultra wideband technology -- Research, Mobile communication systems -- Analysis, Wireless communication systems -- Analysis, Wireless technology, Business, Computers, Electronics, Electronics and electrical industries
Published
2010

12. A simple ultrawideband planar rectangular printed antenna with band dispensation

Author

Thomas, K. G. and Sreenivasan, M.

Subjects
Antenna arrays -- Design and construction, Impedance (Electricity) -- Measurement, Ultra wideband technology -- Research, Mobile communication systems -- Analysis, Wireless communication systems -- Analysis, Wireless technology, Business, Computers, Electronics, Electronics and electrical industries
Published
2010

13. On the accuracy of localization systems using wideband antenna arrays

Author

Yuan Shen and Win, Moe Z.

Subjects
Digital signal processor, Technology application, Signal processing -- Methods, Signal processing -- Equipment and supplies, Signal processing -- Technology application, Ultra wideband technology -- Research, Antenna arrays -- Usage, Antenna arrays -- Technology application
Published
2010

18. Calibration of a UWB sub-band channel model using simulated annealing

Author

Jemai, Jaouhar, Eggers, Patrick C.F., Pedersen, Gert Frolund, and Kurner, Thomas

Subjects
Dielectrics -- Models, Dielectrics -- Properties, Ultra wideband technology -- Research, Simulated annealing (Mathematics) -- Methods, Communications circuits -- Design and construction, Communications circuits -- Models, Business, Computers, Electronics, Electronics and electrical industries
Published
2009

19. Time domain characteristics of band-notched ultrawideband antenna

Author

Yang, Ying-Ying, Chu, Qing-Xin, and Zheng, Zhi-An

Subjects
Antennas (Electronics) -- Design and construction, Time-domain analysis -- Methods, Ultra wideband technology -- Research, Correlation (Statistics) -- Methods, Pulse-duration modulation -- Methods, Business, Computers, Electronics, Electronics and electrical industries
Published
2009

23. Scanning performances of wideband connected arrays in the presence of a backing reflector

Author

Neto, Andrea, Cavallo, Daniele, Gerini, Giampiero, and Toso, Giovanni

Subjects
Antenna arrays -- Design and construction, Potential theory (Mathematics) -- Research, Ultra wideband technology -- Research, Electromagnetic waves -- Polarization, Electromagnetic waves -- Measurement, Business, Computers, Electronics, Electronics and electrical industries
Published
2009

24. An effective technique for symmetric planar monopole antenna miniaturization

Author

Radiom, Soheil, Aliakbarian, Hadi, Vandenbosch, Guy A.E., and Gielen, Georges G.E.

Subjects
Antennas (Electronics) -- Design and construction, Miniaturization (Electronics) -- Methods, Ultra wideband technology -- Research, Business, Computers, Electronics, Electronics and electrical industries
Published
2009

26. A UWB dipole antenna with enhanced impedance and gain performance

Author

Low, Xue Ni, Chen, Zhi Ning, and See, Terence S.P.

Subjects
Dipole antennas -- Design and construction, Ultra wideband technology -- Research, Impedance (Electricity) -- Control, Impedance (Electricity) -- Measurement, Business, Computers, Electronics, Electronics and electrical industries
Published
2009

27. Indoor radio reception at 60 GHz: fading mitigation using diversity techniques

Author

Sanchez, Manuel Garcia, Alejos, Ana Vazquez, and Cuinas, Inigo

Subjects
Wave propagation -- Methods, Millimeter wave communication systems -- Design and construction, Ultra wideband technology -- Research, Electromagnetic waves -- Scattering, Electromagnetic waves -- Measurement, Electromagnetic waves -- Control, Business, Computers, Electronics, Electronics and electrical industries
Published
2009

30. Frequency-dependent UWB channel characteristics in office environments

Author

Choi, Jinwon, Kang, Noh-Gyoung, Sung, Yu-Suk, Kang, Jun-Sung, and Kim, Seong-Cheol

Subjects
Estimation theory -- Research, Communications circuits -- Design and construction, Communications circuits -- Models, Work environment -- Influence, Ultra wideband technology -- Research, Business, Electronics, Electronics and electrical industries, Transportation industry
Published
2009

31. 22.7-dB Gain--19.7-dBm [ICP.sub.1dB] UWB CMOS LNA

Author

Pepe, Domenico and Zito, Domenico

Subjects
Amplifiers (Electronics) -- Design and construction, Complementary metal oxide semiconductors -- Design and construction, Ultra wideband technology -- Research, Circuit design -- Methods, Circuit designer, Integrated circuit design, Business, Computers and office automation industries, Electronics, Electronics and electrical industries
Published
2009

32. An ultra-wideband high-linearity CMOS mixer with new wideband active baluns

Author

Rao, Pei-Zong, Chang, Tang-Yuan, Liang, Ching-Piao, and Chung, Shyh-Jong

Subjects
Complementary metal oxide semiconductors -- Design and construction, Mixers (Electronics) -- Design and construction, Ultra wideband technology -- Research, Business, Computers, Electronics, Electronics and electrical industries
Published
2009

34. A compact ultrawideband monopole antenna for wireless communication application

Author

Lee, Jaewon, Hong, Seokjin, Shin, Jaewoong, and Choi, Jaehoon

Subjects
Antennas (Electronics) -- Design and construction, Ultra wideband technology -- Research, Broadband transmission -- Research, Broadband Internet, Business, Computers, Electronics, Electronics and electrical industries
Published
2009

36. Modeling and state representation of uitrawideband antennas

Author

Duroc, Y., Najam, A.I., Vuong, T.P., and Tedjini, S.

Subjects
Antennas (Electronics) -- Models, Antennas (Electronics) -- Design and construction, Ultra wideband technology -- Research, Parameter estimation -- Methods, Business, Computers, Electronics, Electronics and electrical industries
Published
2009

39. Time transfer in impulse radio networks

Author

Chui, Chee-Cheon and Scholtz, Robert A.

Subjects
Ultra wideband technology -- Research, Radio receivers -- Design and construction, Signals and signaling -- Methods
Published
2009

40. Capacity bounds for peak-constrained multiantenna wideband channels

Author

Schuster, Ulrich G., Durisi, Giuseppe, Bolcskei, Helmut, and Poor, H. Vincent

Subjects
MIMO communications -- Research, Communications circuits -- Design and construction, Ultra wideband technology -- Research, Antennas (Electronics) -- Design and construction
Published
2009

43. A 22-29-GHz UWB pulse-radar receiver front-end in 0.18-[micro]m CMOS

Author

Jain, Vipul, Sundararaman, Sriramkumar, and Heydari, Payam

Subjects
Complementary metal oxide semiconductors -- Design and construction, Ultra wideband technology -- Research, Business, Computers, Electronics, Electronics and electrical industries
Published
2009

49. Blind and efficient serial search strategy for ultrawideband signal initial acquisition

Author

Arias-de-Reyna, Eva and Acha-Catalina, Jose I.

Subjects
Signals and signaling -- Methods, Ultra wideband technology -- Research, Communications circuits -- Design and construction, Business, Electronics, Electronics and electrical industries, Transportation industry
Abstract

The problem of initial acquisition of ultrawideband (UWB) signals in the dense multipath channel is addressed. We demonstrate the advantages of designing the acquisition system so that the size of the uncertainty region is a Fibonacci number and propose a simple search strategy for coarse synchronization that uses no channel knowledge, extending a previous work where we proposed a method based on the golden section, which practically achieved the minimum mean acquisition time (MAT) under a simplistic model. We derive the MAT of the new strategy for this model and compare it with simulation results for a realistic propagation scenario with a high signal-to-noise ratio (SNR). There is an agreement between the theoretical and simulated MATs, which is limited by the differences between the two models. Simulations from moderate to high SNRs confirm that the proposed strategy provides a simple way to achieve the performance of the best strategies for acquisition of wide-bandwidth signals. In particular, it is similar in terms of complexity and performance to the popular bit reversal search, thus providing alternatives in the choice of design parameters wherever the bit reversal search is advisable. Index Terms--Acquisition, serial search, ultrawideband (UWB).

Published
2009

50. Time-reversed ultra-wideband (UWB) multiple input multiple output (MIMO) based on measured spatial channels

Author

Zhou, Chenming, Guo, Nan, and Qiu, Robert Caiming

Subjects
Ultra wideband technology -- Research, MIMO communications -- Research, Communications circuits -- Design and construction, Electromagnetic interference -- Control, Business, Electronics, Electronics and electrical industries, Transportation industry
Abstract

Ultra-wideband (UWB) technology is envisioned for future wireless high-data-rate transmission. A UWB system with multiple antennas takes advantage of the rich scattering environment to increase the data rate. On the other hand, given rich multipath, time reversal (TR) uses scatterers to create space and time focalization at a target point by coherent addition of all scattered contributions at that point. This paper analyzes the performance of an impulse TR-multiple-input-multiple-output (MIMO)-UWB system with a simple one-correlator receiver. The performance analyses are based on UWB spatial channels measured in an office environment. Index Terms--Impulse multiple-input-multiple-output (MIMO), intersymbol interference (ISI), multipath, spatial focusing, time reversal (TR), ultra-wideband (UWB).

Published
2009

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