Millimeter‐wave directional‐antenna beamwidth effects on the ITU‐R building entry loss (BEL) propagation model

Lee, Juyul; Kim, Kyungwon; Kim, Myung‐Don; Park, Jaejoon; Yoon, Young-Joong; Chong, Young Jun

doi:10.4218/etrij.2018-0662

Cited by 14 publications

(6 citation statements)

References 16 publications

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“…L b and L a are the basic transmission loss and the additional loss, respectively. The effects of reflection, scattering, and diffraction are considered in the basic transmission loss, including clutter loss [27,28]. The additional loss comprises the feeder loss, the polarization loss, and BEL [29].…”

Section: Calculation Methodologies For Spectrum Sharing Informationmentioning

confidence: 99%

“…The effects of reflection, scattering, and diffraction are considered in the basic transmission loss, including clutter loss [27,28]. The additional loss comprises the feeder loss, the polarization loss, and BEL [29]. RISS k is selected by confirming the maximum value among all pixels' RISS k , l Here, the RISS k is a value obtained with the assumption that the whole interference signal is fully injected into the FWS receiver.…”

Section: Spectrum Sharing Informationmentioning

confidence: 99%

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Comparison of two methodologies on spectrum sharing information for unlicensed use in the 6‐GHz band

Kim

et al. 2021

ETRI Journal

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With the increasing demand for unlicensed spectrum, several regulators have been opening up the 6-GHz band for unlicensed use while ensuring compliance with the technical requirement to avoid harmful interference in the existing primary services (PSs). In this paper, we present two methodologies, a channel-based method and a frequency-based method, which are applicable to a frequency coordination system that calculates the permissible transmit power in the channels or frequencies available to a secondary service (SS). In addition, we have demonstrated that the available transmit power of an SS can be maximized by adjusting the power allocation of the assigned resource units under the condition that the channel of the SS is partially overlapped with that of the PS. Based on the analysis results, it is suggested that it would be better to utilize the two methods selectively according to the operating channel conditions of the PS and the SS.

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Section: Calculation Methodologies For Spectrum Sharing Informationmentioning

confidence: 99%

Section: Spectrum Sharing Informationmentioning

confidence: 99%

Comparison of two methodologies on spectrum sharing information for unlicensed use in the 6‐GHz band

Kim

et al. 2021

ETRI Journal

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“…We developed a broadband 32 GHz measurement sounder capable of detecting multipath signals with time-and space-varying characteristics. For the configuration of the broadband measurement sounder, the 32 GHz millimeter wave radio frequency part (RF part) was combined with the existing intermediate-frequency part (IF part) and the baseband processing part (BB processing part) [12], [16]. The RF part with a bandwidth of 500 MHz operates at the center frequency of 32.4 GHz.…”

Section: Measurement Description a Measurement Systemmentioning

confidence: 99%

Empirical Model Including the Statistics of Location Variability for the Over-Rooftop Path in the 32 GHz Band

2020

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This paper proposes a propagation prediction model including the statistics of location variability for over-rooftop path in millimeter-wave suburban environments. The predictive model derived from the measurement was developed to analyze the propagation characteristic of the signal according to the distance within the area of a millimeter-wave band or future fifth-generation service band. The measurement was carried out using a radio wave characteristic measurement system called the channel sounder, and the signal transmitted to the air was captured to make the received signal level data. The measurement system was constructed to predict spatial propagation characteristics by transmitting and receiving a signal with a 500 MHz bandwidth, and this system was capable of predicting characteristics of a signal that varied with space and time by capturing wideband multipath signals. Measurements were performed in a small town covered with low-rise commercial restaurants or houses. The transmission signal propagated through the rooftops of low-rise houses on average 10 meters high. Their multipath signal arrived at a receiving station located under the roof of the house through reflection, diffraction, and scattering mechanisms. The change in the signals due to the variation in location was measured up to a distance of about 500 meters from the transmitter. The basic transmission loss prediction model with a probability density distribution was analyzed and interpreted based on these measurements. In practice, it was necessary to statistically model for path loss according to the characteristics of the location due to the various environment changes, such as buildings and roads. The proposed prediction model derived from the measurement data reflects the propagation impact on over-rooftop paths in a small town and includes the statistics of location variability in line-of-sight and non-line-of-sight regions.

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“…However, since the wavelength shrinks by an order of magnitude compared with the microwave, mmW suffers from greater attenuation [9], [11], [12]. Measurements showed the penetration loss of common building materials from 20 to 50dB [13], the diffraction loss over rooftop from 10 to 80dB [14], the rain attenuation with a few dB/km [15].…”

Section: Introductionmentioning

confidence: 99%

A Vector-Based Approach for Dimensioning Small Cell Networks in Millimeter-Wave Frequencies

Zhang

Sun

2022

IEEE Trans. Veh. Technol.

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Millimeter wave (mmW) is being deployed in hotspot scenarios for providing high bandwidths. However, the coverage of mmW cell is limited due to the rapid attenuation during the propagation and sensitivity to blockage by obstacles. In this paper, we propose a novel dynamic programming approach for automated dimensioning and appropriate placement of mmW small cells (SCs) in dense urban under the constraints of coverage and budget. Being cognizant of the blockage by city buildings, a fast search algorithm based on vector is introduced to enable most line-of-sight (LOS) communication links between base stations (BSs) and mobile stations (MSs). The analysis of time complexity is also derived in closed forms. The evaluation of our approach was carried out in both hypothetic and realistic scenarios. Results show that the studied model is effective for a real large-scaled network and 4 or 5 times faster than the conventional ones based on grid-map.

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Millimeter‐wave directional‐antenna beamwidth effects on the ITU‐R building entry loss (BEL) propagation model

Cited by 14 publications

References 16 publications

Comparison of two methodologies on spectrum sharing information for unlicensed use in the 6‐GHz band

Comparison of two methodologies on spectrum sharing information for unlicensed use in the 6‐GHz band

Empirical Model Including the Statistics of Location Variability for the Over-Rooftop Path in the 32 GHz Band

A Vector-Based Approach for Dimensioning Small Cell Networks in Millimeter-Wave Frequencies

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