A new path-gain/delay-spread propagation model for digital cellular channels

Greenstein, L.J.; Erceg, V.; Yeh, Y. S.; Clark, M.V.

doi:10.1109/25.580786

Cited by 312 publications

(195 citation statements)

References 25 publications

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“…For the other buildings in this motionless case, we cannot categorically state that RMS-DS increases with distance for all cases, although the simplest linear fits to the measured points would indeed show positive slopes. In cellular cases, RMS-DS typically increases with distance [16], whereas in narrow confined environments such as corridors or tunnels, RMS-DS decreases with distance once beyond a distance larger than the corridor/tunnel width [17]. In the classic indoor channel work of [11], RMS-DS was found to be generally not correlated with distance in the indoor environment with transmitter and receiver located in the same floor without LOS.…”

Section: Rms Delay Spreadmentioning

confidence: 96%

Characterization of the 5-GHz Elevator Shaft Channel

Sun

Matolak

2013

IEEE Trans. Wireless Commun.

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Abstract-In this paper we provide channel characterization results for the elevator shaft channel in the 5-GHz band, based upon measurements conducted in four buildings. This channel is of interest for several applications, including WiFi and public safety. Although several authors have provided elevator shaft channel characteristics for lower-frequency bands (255-MHz, 900-MHz, 1.9-GHz), to our knowledge this is the first work that addresses the 5-GHz band. Moreover, prior work has not thoroughly addressed channel characteristics when the elevator car is in motion, whereas here we provide measurement and modeling results for this dynamic condition. Our measurements were of power delay profiles, from which we estimated propagation path loss and root-mean square delay spread (RMS-DS). Path loss exponents were approximately 2.5 in one building and 5.5 in the other three buildings, with standard deviations about the log-distance linear fits equal to approximately 3 dB and 5.5 dB, respectively. Mean RMS-DS values range from approximately 14-60 ns when the elevator car is motionless. Maximum RMS-DS values were 144 ns and 152 ns in the two different types of buildings when the elevator car is moving. The significant differences in these channel characteristics among the four buildings are likely attributable to the distinct physical features of the buildings.Index Terms-Path loss, RMS delay spread, tapped delay line.

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Section: Rms Delay Spreadmentioning

confidence: 96%

Characterization of the 5-GHz Elevator Shaft Channel

Sun

Matolak

2013

IEEE Trans. Wireless Commun.

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“…Furthermore, it is correlated with shadowing [11], [12]. Measurement results have also shown that in some environments, multipath components are not always uniformly spread out.…”

Section: Introductionmentioning

confidence: 93%

“…Channel measurement analyses, such as those by Greenstein et al [11], show that the dispersion encountered in a given environment statistically increases with the distance of the mobile from the base station (BS). Furthermore, it is correlated with shadowing [11], [12].…”

Section: Introductionmentioning

confidence: 99%

“…The model is among the most comprehensive models available currently [16]- [18]. It builds upon the COST231 studies, is widely supported for realistic simulations of WCDMA, and incorporates the results of several extensive measurement campaigns, e.g., [11], [12], [15], [19]. While using stored traces or ray-tracing methods leads to very accurate channel descriptions, as they can incorporate most of the details of the radio environment, their results are location-specific and can suffer from a lack of generality.…”

Section: Introductionmentioning

confidence: 99%

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Macrocell-Wide Behavior of the Orthogonality Factor in WCDMA Downlinks

Mehta

Molisch

Greenstein

2006

IEEE Trans. Wireless Commun.

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The orthogonality factor (OF) quantifies the loss of orthogonality between the signals transmitted simultaneously on a wideband code division multiple access (WCDMA) downlink due to multipath dispersion. It is one of the fundamental parameters that determines the signalto-interference-plus-noise ratio at the output of the Rake receiver and, consequently, it has a significant impact on downlink system capacity. The OF depends greatly on the delay profile of the multipath channel between the mobile and its serving base station; this profile varies considerably from one location in the cell to another. In this paper, we study how the statistical properties of the small-scale-fading-averaged OF vary over the entire macrocellular area. We use an ensemble of channel profiles at different locations in a cell generated from an implementation of the comprehensive COST259 channel model, which incorporates results from several experimental investigations. We show that the small-scale-fading-averaged OF is itself a random variable whose statistics depend on the mobile's distance from its serving base station. The large observed variance of the OF indicates that using a single value for all users in downlink capacity analyses and simulations, as has been the practice, may lead to erroneous conclusions. Finally, we propose a simple model that closely matches the statistics of the OF as a function of mobileto-base distance, thus obviating the need to set up the complicated channel model every time OF values are to be generated. IEEE Transactions on Wireless Communications (2006)This work may not be copied or reproduced in whole or in part for any commercial purpose. Permission to copy in whole or in part without payment of fee is granted for nonprofit educational and research purposes provided that all such whole or partial copies include the following: a notice that such copying is by permission of Mitsubishi Electric Research Laboratories, Inc.; an acknowledgment of the authors and individual contributions to the work; and all applicable portions of the copyright notice. Copying, reproduction, or republishing for any other purpose shall require a license with payment of fee to Mitsubishi Electric Research Laboratories, Inc. All rights reserved. Abstract-The orthogonality factor (OF) quantifies the loss of orthogonality between the signals transmitted simultaneously on a wideband code division multiple access (WCDMA) downlink due to multipath dispersion. It is one of the fundamental parameters that determines the signal-to-interference-plus-noise ratio at the output of a Rake receiver and, consequently, it has a significant impact on downlink system capacity. The OF depends greatly on the delay profile of the multipath channel between the mobile and its serving base station; this profile varies considerably from one location in the cell to another.In this paper, we study how the statistical properties of the small-scale-fading-averaged OF vary over the entire macrocellular area. We use an ensemble of channel profiles ...

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“…The delay profile is characterized by τ rms (rms delay spread of the entire delay profile). It was found that the rms delay spread for omnidirectional antennas [12] follows a lognormal distribution and that the median of this distribution grows as some power of …”

Section: A Estimation Of Delay Spreadmentioning

confidence: 99%

Performance evaluation of broadband fixed wireless system based on IEEE 802.16

Joseph

Martens

2006

IEEE Wireless Communications and Networking Conference, 2006. WCNC 2006.

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Abstract-Fixed Wireless Access systems operating below 11 GHz have the potential to provide broadband wireless access for non line-of-sight operation. In this paper the performance of a typical broadband fixed wireless system based on the IEEE 802.16-2004 specifications is determined. A scenario for business applications with outdoor customer premises equipment is investigated in the 3.5 GHz frequency band. Different path loss models and terrain types are considered. Coverage and throughput in a sector are determined for this business scenario.

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A new path-gain/delay-spread propagation model for digital cellular channels

Cited by 312 publications

References 25 publications

Characterization of the 5-GHz Elevator Shaft Channel

Characterization of the 5-GHz Elevator Shaft Channel

Macrocell-Wide Behavior of the Orthogonality Factor in WCDMA Downlinks

Performance evaluation of broadband fixed wireless system based on IEEE 802.16

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