Results 131 to 140 of about 4,630 (180)
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A statistical model of urban multipath propagation
IEEE Transactions on Vehicular Technology, 1972An urban multipath propagation experiment, involving the simultaneous transmission from a fixed site of 100-ns pulses at 488, 1280, and 2920 MHz and their reception at a mobile van, is described. A statistical analysis of the data in the resulting multipath responses is given and used as a basis for a statistical model of urban multipath propagation.
G.L. Turin +4 more
exaly +2 more sources
IEEE Global Telecommunications Conference and Exhibition. Communications for the Information Age, 2003
Wideband multipath measurements at 1300 MHz have been made in five factories in Indiana. The RMS delay spread ( sigma ) values were found to range between 30 ns and 300 ns. Median sigma values were 96 ns for line-of-sight (LOS) paths along aisleways and 105 ns for obstructed paths across aisles.
T.S. Rappaport, C.D. McGillem
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Wideband multipath measurements at 1300 MHz have been made in five factories in Indiana. The RMS delay spread ( sigma ) values were found to range between 30 ns and 300 ns. Median sigma values were 96 ns for line-of-sight (LOS) paths along aisleways and 105 ns for obstructed paths across aisles.
T.S. Rappaport, C.D. McGillem
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Effects of Multipath Propagation on Digital Radio
IEEE Transactions on Communications, 1981This paper summarizes experimental work at Bell Laboratories in the field of multipath propagation as it affects digital radio. Field and laboratory measurements are presented on commercial-quality high-speed digital radio systems working in the 4, 6, and 11 GHz common carrier bands. Circuits and equipment used in these systems are all state of the art,
Adolf J. Giger, William T. Barnett
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Propagation Characteristics of Dense Multipath Components
IEEE Antennas and Wireless Propagation Letters, 2010The dense multipath components (DMC) represent the part of the radio channel that cannot be characterized by a superposition of distinct plane waves, i.e., the specular components (SC). In this letter, the propagation characteristics of the DMC are analyzed in indoor environments from two perspectives. First, the proportion of DMC in the total power is
Salmi, Jussi +6 more
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An adaptive antenna for a multipath propagation environment
ICC '98. 1998 IEEE International Conference on Communications. Conference Record. Affiliated with SUPERCOMM'98 (Cat. No.98CH36220), 2002A multipath propagation environment is inevitable in mobile radio. Frequency-selective fading is serious hindrance in high-speed TDMA transmission because the delay difference between multipath signals is large in comparison with the symbol duration. This paper presents a novel adaptive antenna for mobile radio.
Yasutaka Ogawa +3 more
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A Statistical Model for Indoor Multipath Propagation
IEEE Journal on Selected Areas in Communications, 1987The results of indoor multipath propagation measurements using 10 ns, 1.5 GHz, radarlike pulses are presented for a medium-size office building. The observed channel was very slowly time varying, with the delay spread extending over a range up to about 200 ns and rms values of up to about 50 ns. The attenuation varied over a 60 dB dynamic range.
Reinaldo A. Valenzuela, Adel A. M. Saleh
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Multipath propagation for helicopter-to-ground MIMO links
2011 - MILCOM 2011 Military Communications Conference, 2011Air-to-ground communication for aeronautical telemetry is often impaired by multipath propagation, particularly when the aircraft is near the flight-line. This paper experimentally studies such a channel using measurements from multiple antennas on a helicopter to multiple receiving antennas on the ground as the helicopter maneuvers on a taxiway near ...
Michael Rice, Michael Jensen
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Automotive Radar Multipath Propagation in Uncertain Environments
2018 21st International Conference on Intelligent Transportation Systems (ITSC), 2018Future use of high-resolution near range radar sensors for vehicle environment perception is facing challenges in terms of detection and correct assignment of multipath reflections (false-positives) from surfaces and obstacles. This paper presents a novel geometric model to determine the relative positions from surrounding targets and reflection ...
Alexander Kamann +5 more
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Cooperative simultaneous localization and mapping by exploiting multipath propagation
IEEE Transactions on Signal Processing, 2016An affordable and reliable indoor positioning is a highly needed service. Moreover, maps of the indoor environment are vital to many applications. In this paper, a method for joint localization and mapping using multipath delay estimates is developed.
Koivunen, Visa, Naseri, Hassan
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Simulation of multipath propagation inside building
Proceedings of ICC '93 - IEEE International Conference on Communications, 2002Preliminary studies are required in order to use microwaves as support of information transmission inside buildings because of the problems of multipath propagation. Simulations based on the uniform theory of diffraction (UTD) are presented. The first example concerns diffraction phenomena due to an elementary wedge formed by two walls.
P. Mariage, S. Baranowski, M. Lienard
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