Clustering method based on scatterer locations for indoor dynamic MIMO channel

Hanpinitsak, Panawit; Saito, Kentaro; Takada, Jun‐ichi; Kim, Minseok; Materum, Lawrence

doi:10.1109/eucap.2016.7481586

Cited by 8 publications

(7 citation statements)

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“…Theory-based using PO [34]. In the measurement-based analysis, MPC parameters and scattering points (SPs) were estimated from the channel sounder [5], [6] using SAGE [32] and an enhanced measurement-based ray tracer (MBRT) [30], [33]. These SPs can be divided into single bounce (SB) SPs (SBSPs), double bounce (DB) SPs (DBSPs), and triple bounce (TB) SPs (TBSPs).…”

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confidence: 99%

“…Our contributions and enhancements in relation to our previous papers [23], [24] are divided into three aspects: First, we identified the geometry-based clusters and IOs in the propagation environment automatically by applying the scattering point-based KPowerMeans (SPKPM) algorithm to the SIMO channel to estimate the geometrybased clusters. SPKPM was already proposed by the authors in [30], [33], but only applied to the 11 GHz channel. This approach is also different from that of [31], which utilizes visual inspection to obtain the geometry-based clusters.…”

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confidence: 99%

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Frequency Characteristics of Geometry-Based Clusters in Indoor Hall Environment at SHF Bands

et al. 2019

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This paper presents an analysis of geometry-based cluster frequency dependency at super-highfrequency bands, including 3, 10, and 28 GHz. First, multipath components were extracted from the measured data by using the space-alternating generalized expectation-maximization algorithm. Then, geometry-based clusters were estimated by using the enhanced scattering point-based KPowerMeans (SPKPM) algorithm. Finally, the frequency dependencies of their scattering intensities were discussed with the assistance of physical optics. The analysis results showed that the SPKPM could also be applied to obtain reasonable scattering locations at multiple frequencies in most cases. In addition, reflection on smooth surfaces was the dominant mechanism of clustering where there was no frequency dependence, whereas diffraction, scattering, and shadowing were significant causes of frequency dependence. Assuming that the line-of-sight is obstructed, diffraction, scattering, and shadowing accounted for 30-40% of the entire channel in terms of power, which was not negligible and thus the channel was largely frequency-dependent. The analysis results are expected to provide crucial insights for multiple-frequency channel modeling for fifth-generation wireless systems. INDEX TERMS Radio propagation, SHF bands, indoor, MPC clustering, channel models, physical optics. I. INTRODUCTION Owing to the large available bandwidth and the possibility to construct a compact antenna array with a large number of elements, millimeter wave (mmWave) bands have been suggested as the primary enabler of fifth-generation (5G) communication systems [1], [2], in order to accommodate a dramatic increase in data traffic. However, the transmitted signals suffer from larger free space path loss in these bands. Furthermore, the performance is more susceptible to shadowing and mobile station movement. Thus, to compensate for these effects as well as to ensure compliance with strict regulations, it is possible that a very large bandwidth or several subbands from the microwave to mmWave bands may be The associate editor coordinating the review of this manuscript and approving it for publication was Jose Saldana.

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Frequency Characteristics of Geometry-Based Clusters in Indoor Hall Environment at SHF Bands

et al. 2019

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“…Its database configuration can duplicate the systems of [19,20]. The concept of this research can be used in the following Control Systems model in the studies of [21,22,23,24,25,26].…”

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Fuzzy Logic Control System with Gaussian Membership Functions

Africa¹,

Arevalo²,

Publico³

et al. 2019

IJETER

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One of the most widely known advanced control techniques is Fuzzy Logic Control. This paper aims to define the concept and function of Fuzzy Logic Control. Furthermore, this paper consists of brief discussion on how this type of control works, and how it is applied to several types of control systems. The procedure followed by this approach is explained and presented in this paper as well. This includes a discussion on the three steps namely fuzzification, Fuzzy Logic has become a popular approach in researches in the fields of science, technology, engineering, and medicine. This paper also shows the versatility of this approach in terms of numerous functions and applications.

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“…At the right side of every checkbox, there the Enabled/Disabled button, which will activate or deactivate the timer sequence for overheating. For this type of configuration Clustering Methods and Fuzzy Logic can be used [24,25] and so is Spatial Imaging algorithms and ANN [26,27]. 1.…”

Section: Mobile Phone Graphical User Interface (Gui) For Appliance Remote Control: An Sms-based Electronic Appliance Monitoring and Contrmentioning

confidence: 99%

Mobile Phone Graphical User Interface (GUI) for Appliance Remote Control: An SMS-based Electronic Appliance Monitoring and Control System

Africa¹

2019

IJATCSE

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The home monitoring system is an effective way to prevent many household accidents that may occur whether we are aware or not. There are a lot of home control devices which were developed in the past. Take fire hazards for example, there are a lot of ways for a house fire to occur like overheating appliances. Fire imposes a big hazard in our homes but there is a device that was built to lessen the probability of this from occurring or at least lessen the damage done. The fire alarm works whenever there is enough smoke that goes in the detector. It will automatically make a sound to alarm the people inside the house, some home systems have a built-in sprinkler that work when the fire alarm activates preventing further property destruction. There are a lot of ways of designing a home control system but at these times, the design must be adaptable and adaptive to most people. Global System for Mobile Communication (GSM) is a means of wireless communication between people. It can also be used to communicate with devices such that it functions even if a user is not physically present in the vicinity of the device. GSM is the most adaptable medium since it has a further range of communication compared to Bluetooth and infrared. Moreover, it is also more accessible than Wi-Fi since it is more widely available. A home monitoring system interfaced with GSM poses a great advantage and convenience to the public. The user can be updated regarding the status (ON or OFF) of his appliances which can prevent future damage. It will also be able to alarm the user of any irregular activities of the appliances immediately even if the user is at another place.

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Clustering method based on scatterer locations for indoor dynamic MIMO channel

Cited by 8 publications

References 4 publications

Frequency Characteristics of Geometry-Based Clusters in Indoor Hall Environment at SHF Bands

Frequency Characteristics of Geometry-Based Clusters in Indoor Hall Environment at SHF Bands

Fuzzy Logic Control System with Gaussian Membership Functions

Mobile Phone Graphical User Interface (GUI) for Appliance Remote Control: An SMS-based Electronic Appliance Monitoring and Control System

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