A CDMA-distributed antenna system for in-building personal communications services

Xia, H.H.; Herrera, A.; Kim, S.; Rico, F.

doi:10.1109/49.490415

Cited by 35 publications

(22 citation statements)

References 4 publications

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“…A common belief for achieving better coverage and lowpower consumption is to allocate antenna symmetrically for the DAS [1,2,16]y. However, the investigation results illustrated here show that the improvement by utilizing the DAS is marginal due to the non-negligible cross-correlation attributed to the symmetric antenna constellations.…”

Section: Modeling Spatial Cross-correlation Of Fading In a Dasmentioning

confidence: 99%

“…First, it allows the same coverage of an area with less power consumption since the distributed antennas create line-of-sight (LoS) connections to the mobile station, which can significantly reduce the power consumption caused by wall penetration inside buildings. Also, it reduces the delay spreads of the received signals, as well as the complexity of receivers [1,2]. The locations of antennas can be designed following different principles, e.g., achieving better coverage, enhancing spectral efficiency [3], or increasing the quality of received signals [4].…”

Section: Introductionmentioning

confidence: 99%

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Spatial cross-correlation modeling for propagation channels in indoor distributed antenna systems

Tian

Yin

Zhou

et al. 2013

J Wireless Com Network

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In this contribution, the spatial cross-correlation of composite channels in a distributed antenna system (DAS) is studied for the case that a nine-antenna DAS is deployed in an indoor environment. As few measurement data of DAS propagation channels are available, the propagation graph modeling based on the electromagnetic wave reverberation theory is used to generate the synthetic impulse responses (IRs) for the composite channels induced by the different groups of antennas in the DAS. The simulations take into account the geographic parameters of the environment, the cluttering scatterers, the realistic visibility conditions, as well as the flexible locations for the antennas, and the user equipment. The uncorrelated scattering assumption is proved to be valid by using the real measurement data from the indoor environments. Based on this assumption, narrowband channel cross-correlation is computed by integrating the small-scale fading cross-correlation within the same delay bins in two channel IRs. The characteristics of the cross-correlation in four cases with different antenna grouping are investigated for the nine-antenna DAS. Part of the modeling results are shown to be consistent with the empirical counterparts for specific DAS constellations calculated using the real measurement data.

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Section: Modeling Spatial Cross-correlation Of Fading In a Dasmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Spatial cross-correlation modeling for propagation channels in indoor distributed antenna systems

Tian

Yin

Zhou

et al. 2013

J Wireless Com Network

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“…The problem of selecting the minimum number of transmitters, however, is NPhard [1]. There are existing optimization methods to determine the locations of transmitting antennas [2,3] and ray-tracing [4][5][6][7][8][9][10][11][12][13][14][15][16] methods to design and optimize the base stations; however, none of them provides an efficient integrated approach that can lead to the achievement of an optimum wireless coverage. To achieve this goal, it is imperative to incorporate the ray-tracing technique with the proper optimization algorithm.…”

Section: Introductionmentioning

confidence: 99%

“…The node 3 of t 2 becomes the next E-node, which generates nodes 10 and 11 for t 3 and t 4 , respectively and skips node for t 6 because of the second bounding function. The next E-node 4 of t 3 generates only one node 12 for t 4 and skips node for t 6 because of the second bounding function. The last node 6 on the same level cannot generate any node because of the second bounding condition as well.…”

mentioning

confidence: 99%

A Novel Integrated Mathematical Approach of Ray-Tracing and Genetic Algorithm for Optimizing Indoor Wireless Coverage

Reza¹,

Sarker²,

Dimyati³

2010

PIER

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Abstract-While designing wireless networks, it is crucial to obtain the maximum coverage by using the minimum number of transmitting antennas. This paper proposes a new algorithm for determining the minimum number of transmitting antennas as well as their appropriate locations to provide the optimized wireless coverage in the indoor environment. The proposed algorithm uses a ray-tracing method to predict the signal distribution among the sampling points in the indoor area due to one or more transmitters and the genetic algorithm (GA) incorporated with the Breath First Search (BFS) terminology to determine the minimum number of transmitters and their corresponding locations to achieve the optimum wireless coverage. The proposed method outperforms the existing method in terms of both space and time complexities. The results obtained from this study also show that the computation time using the proposed algorithm is much less than that of the existing algorithm.

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“…To improve the throughput of indoor wireless access, distributed antenna techniques have been proposed in [1] - [6] over ten years ago. Recently, it has taken on renewed interesting.…”

mentioning

confidence: 99%

Hot-spot wireless access exploiting shadowing diversity of distributed antennas

Zhang

2008

2008 IEEE International Symposium on Broadband Multimedia Systems and Broadcasting

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In this paper, we investigate throughput improvement of hot-spot wireless access with distributed antennas. To exploit shadowing diversity of multiple distributed antennas, we propose an antenna selection, which takes both desired signal strength and interference strength into consideration. We also develop a power allocation approach to further enhance the throughput of wireless access. We then use wireless stadium as an example to demonstrate the effectiveness of the proposed approaches.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. Jinyun Zhang Mitsubishi Electric Research LabsAbstract-In this paper, we investigate throughput improvement of hot-spot wireless access with distributed antennas. To exploit shadowing diversity of multiple distributed antennas, we propose an antenna selection approach, which takes both desired signal strength and interference strength into consideration. We also develop a power allocation approach to further enhance the throughput of wireless access. We then use wireless stadium as an example to demonstrate the effectiveness of the proposed approaches.

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A CDMA-distributed antenna system for in-building personal communications services

Cited by 35 publications

References 4 publications

Spatial cross-correlation modeling for propagation channels in indoor distributed antenna systems

Spatial cross-correlation modeling for propagation channels in indoor distributed antenna systems

A Novel Integrated Mathematical Approach of Ray-Tracing and Genetic Algorithm for Optimizing Indoor Wireless Coverage

Hot-spot wireless access exploiting shadowing diversity of distributed antennas

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