Large-Scale Characteristics of 5.25 GHz Based on Wideband MIMO Channel Measurements

Gao, Xin; Zhang, Jianhua; Xu, Ding; Zhang, Ping; Lu, Yang; Wang, Dong

doi:10.1109/lawp.2007.897513

Cited by 30 publications

(18 citation statements)

References 6 publications

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“…In indoor environment, if LOS was dominant, the measured XPD (14 dB) was higher than 10 dB [5]. Here XPD values are also consistent with the measurement in indoor propagation environment in [6]. Fig.…”

Section: Numerical Resultssupporting

confidence: 86%

Cross-polarization discrimination of MIMO antenna configuration at a mobile station in indoor propagation environment

Xiao

Ouyang

2010

AEU - International Journal of Electronics and Communications

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Section: Numerical Resultssupporting

confidence: 86%

Cross-polarization discrimination of MIMO antenna configuration at a mobile station in indoor propagation environment

Xiao

Ouyang

2010

AEU - International Journal of Electronics and Communications

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“…The measured PL values are calculated in decibels as fitting the decibel path loss to the decibel distance with a random variation. The empirical model of log-distance PL [6][7] is where expressed as…”

Section: A Path Lossmentioning

confidence: 99%

Channel Properties of indoor part for high-speed train based on wideband channel measurement

Wang

Ding

et al. 2010

Proceedings of the 5th International ICST Conference on Communications and Networking in China

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In this paper, the statistical channel properties and channel modeling of indoor part for high-speed train communication sysem is presented based on wideband channel measurement at 2.35GHz. Two configurations of base station (8S) antennas, the omni-directional ceiling antenna and the planar antenna on the wall, are used in the measurement, in order to compare different channel characteristics and facilitate the future wide band system deployment. Channel properties, such as Path Loss (PL), Delay Spread (DS) and Ricean K-factor, are analyzed and modeled. The empirical log-distance PL models are derived. It is found that PL with planar antenna at BS is 10dB bigger than that with omni-directional antenna. The latter is even smaller than the PL of the free space. The distributions of DS under these two configurations are both well fitted with the lognormal distribution, and the mean values of them are similar. However, K-factors in decibel are quite different, although both follow well with the normal distribution. The mean values of K-factor with the omni-directional antenna and the planar antenna at BS are 10.41 dB and 4.09 dB, respectively.

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“…Finally and most importantly, due to the variation in layout of buildings, building materials, user density, the propagation environments in China manifest different characteristics from environments in Europe. Our former measurement results in the conventional BS-MS link indicate that the divergence in the statistics of channel parameters is significant, no matter whether in indoor [11] or outdoor [12] scenarios. Thus, an insight into the characteristics of relay channel in typical propagation environments of China is of important significance for the deployment of relay-based communication systems in China.…”

Section: Introductionmentioning

confidence: 84%

Experimental investigation of MIMO relay channels statistics and capacity based on wideband outdoor measurements at 2.35 GHz

Nie

Zhang

Liu

et al. 2011

Sci. China Inf. Sci.

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Relay, which serves to enhance the performance of future communication networks, is one of the most promising techniques for IMT-Advanced systems. The potential performance improvement of relay is investigated in this work. Our investigation consists of two steps. In the first step, to obtain a better understanding of the fundamental properties of relay channels, we conducted outdoor measurements at 2.35 GHz with 50 MHz bandwidth in a typical urban area of China. Three links constituting the relay transmission, i.e., the link between base station and relay station, the link between relay station and mobile station and the link between base station and mobile station were measured by employing a real-time channel sounder. Two main factors that affect the MIMO channel capacity, i.e., the channel gain and effective degrees of freedom, are investigated. The cross-polarization discrimination was obtained by utilizing space-alternating generalized expectation-maximization algorithm. The channel parameters of the three links are statistically analyzed and compared. In the second step, based on the measured data, the performance of different relaying schemes, i.e., amplify-and-forward and decode-and-forward, is evaluated. The impact of RS antenna configuration on the capacity is also analyzed. The measurement and evaluation results reveal that the relay can significantly improve the system coverage and performance. CitationNie X, Zhang J H, Liu Z M, et al. Experimental investigation of MIMO relay channels statistics and capacity based on wideband outdoor measurements at 2.

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Large-Scale Characteristics of 5.25 GHz Based on Wideband MIMO Channel Measurements

Cited by 30 publications

References 6 publications

Cross-polarization discrimination of MIMO antenna configuration at a mobile station in indoor propagation environment

Cross-polarization discrimination of MIMO antenna configuration at a mobile station in indoor propagation environment

Channel Properties of indoor part for high-speed train based on wideband channel measurement

Experimental investigation of MIMO relay channels statistics and capacity based on wideband outdoor measurements at 2.35 GHz

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