Large Scale Parameters and Double-Directional Characterization of Indoor Wideband Radio Multipath Channels at 11 GHz

Kim, Minseok; Konishi, Y.; Chang, Yanxun; Takada, Jun‐ichi

doi:10.1109/tap.2013.2288633

Cited by 54 publications

(41 citation statements)

References 25 publications

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“…where ∆ τ is the delay resolution and 4∆ τ is the length of a sliding window. The condition (10) ensures that only local maximums above a local average are detected as peaks in order to avoid detecting artifacts and noisy peaks. The azimuth angle ϕ i is defined based on the maximum of the PADPs at delay τ i .…”

Section: Dual-polarized Multipath Detectionmentioning

confidence: 99%

Modeling the Multipath Cross-Polarization Ratio for 5–80-GHz Radio Links

Karttunen

Järveläinen

Nguyen

et al. 2019

IEEE Trans. Wireless Commun.

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In this paper, we parameterize an excess loss-based multipath component (MPC) cross-polarization ratio (XPR) model in indoor and outdoor environments for above-6 GHz frequency bands. The results are based on 28 measurement campaigns in several frequency bands ranging from 15 to 80 GHz. A conventional XPR model of an MPC assuming a constant mean value fits our measurements very poorly and moreover overestimates the depolarization effect. Our measurements revealed a clear trend that the MPC XPR is inversely proportional to an excess loss in reference to the free-space path loss. The model is physically sound as a higher excess loss is attributed to more lossy interactions or to a greater number of interactions with objects, leading to a greater chance of depolarization. The measurements furthermore showed that the MPC XPR is not strongly frequency or environment dependent. In our MPC XPR model, an MPC with zero-dB excess loss has a mean XPR of 28 dB. The mean XPR decreases half-a-dB as the excess loss increases by every dB and the standard deviation around the mean is 6 dB.The model is applicable to existing channel models to reproduce realistic MPC XPRs for the above 6-GHz radio links.

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Section: Dual-polarized Multipath Detectionmentioning

confidence: 99%

Modeling the Multipath Cross-Polarization Ratio for 5–80-GHz Radio Links

Karttunen

Järveläinen

Nguyen

et al. 2019

IEEE Trans. Wireless Commun.

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“…However, (15) leads to an enormous computational complexity to find the optimum multi-dimensional parameters of L MPCs if L increasing. Therefore, to relax the computational complexity some modified MLEs have been implemented using iterative methods such as SAGE (space alternative generalized expectation maximization) algorithm [58], RIMAX (Richter maximum likelihood estimation) [59], etc.…”

Section: Mpc Extraction and Automatic Clusteringmentioning

confidence: 99%

“…Comparing with the 3GPP UMi model, it can be seen that the AS at MS significantly decreases while the AS at BS are similarly distributed. Figure 18(c) shows the cluster's polarization properties of cross-polarization power ratio (XPR) and co-polarization power ratio (CPR) [15] where the cluster XPR and CPR were characterized averaging those of all paths within a cluster. It can be seen that the distributions of them are very similar to those of 3GPP UMi model for both conditions of NLoS and LoS.…”

Section: Cluster Parametersmentioning

confidence: 99%

“…In Dec. 2012, the world's first 10-Gbps transmission experiments using 8 × 16 MIMO were successfully demonstrated [13], [14]. At the same time, propagation channel measurement campaigns in various indoor/outdoor environments have been extensively performed and the large scale characteristics have partly been reported in [15], [16]. When this piCopyright © 2018 The Institute of Electronics, Information and Communication Engineers oneering work was launched, the authors were even doubtful about the success of the use of such a high frequency above 10 GHz for the mobile communication systems, recognizing the theoretical limitations of the propagation characteristics [17].…”

Section: Introductionmentioning

confidence: 99%

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Multi-Dimensional Radio Channel Measurement, Analysis and Modeling for High Frequency Bands

Kim

Takada

Saito

2018

IEICE Trans. Commun.

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SUMMARY In order to utilize higher frequency bands above 6 GHz, which is an important technical challenge in fifth generation mobile systems, radio propagation channel properties in a large variety of deployment scenarios should be thoroughly investigated. The authors' group has been involved in a fundamental research project aimed at investigating multipleinput-multiple-output (MIMO) transmission performance and propagation channel properties at microwave frequency above 10 GHz from 2009 to 2013, and since then they have been conducting measurement and modeling for high frequency bands. This paper aims at providing comprehensive tutorial of a whole procedure of channel modeling; multi-dimensional channel sounding, propagation channel measurement, analysis, and modeling, by introducing the developed MIMO channel sounders at high frequency bands of 11 and 60 GHz and presenting some measurement results in a microcell environment at 11 GHz. Furthermore, this paper identifies challenges in radio propagation measurements, and discusses current/future channel modeling issues as future works.

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“…Additional frequency resources are needed to fulfill a massive increase in data traffic. During the past few years, the properties of radio channel have been investigated at higher frequency bands, e.g., at 11 GHz [1], 28 GHz [2] and 60 GHz [3]. The most important parameter in the field of radio channel modeling is the propagation loss at a given link distance.…”

Section: Introductionmentioning

confidence: 99%

Outdoor-to-indoor path loss modeling at 10.1 GHz

Roivainen

Hovinen

Tervo

2016

2016 10th European Conference on Antennas and Propagation (EuCAP)

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This paper presents a grazing angle dependent outdoor-to-indoor (O2I) path loss model at 10.1 GHz for a glass and a concrete wall. The COST 231 O2I path loss model is used as a baseline in model creation. The parameters for the model are derived from radio channel measurements performed with a vector network analyzer and a single-input single-output antenna configuration at 500 MHz bandwidth. The results indicate that attenuation through the concrete wall is heavily dependent on the wall material whereas the attenuation through the window is on the same level as in the lower frequencies.

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Large Scale Parameters and Double-Directional Characterization of Indoor Wideband Radio Multipath Channels at 11 GHz

Cited by 54 publications

References 25 publications

Modeling the Multipath Cross-Polarization Ratio for 5–80-GHz Radio Links

Modeling the Multipath Cross-Polarization Ratio for 5–80-GHz Radio Links

Multi-Dimensional Radio Channel Measurement, Analysis and Modeling for High Frequency Bands

Outdoor-to-indoor path loss modeling at 10.1 GHz

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