Multi-band Measurements in Indoor Environments

Salous, Sana; Al-jzari, Amar; Abdulali, Mohamed; Towers, Jack

doi:10.23919/eucap51087.2021.9410968

Cited by 4 publications

(7 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Table (2) displays path loss parameters from previous studies for indoor propagation channel modeling at mmWave and sub-THz frequency bands. In order to validate the presented models, we use the different parameters that have been published in previous work such as [11,12,13]. So that figs ( 2) and (3) show the CI, FI and ABG path loss models LOS and NLOS at frequencies 28GHz and 73GHz respectively and fig (4) shows CI, FI and ABG path loss models LOS at frequencies 300GHz.…”

Section: Model Verificationmentioning

confidence: 99%

“…Following, calculate path loss using various propagation models, SINR, and aggregated throughput. In this paper, we will utilize three path-loss models: The primary is the single-frequency close-in (CI) free space, the single-frequency floating-intercept (FI), and the alphabeta-gamma (ABG) [11]. The first is the single-frequency close-in (CI) free space reference distance model, which is defined as in equation (1).…”

Section: Model Verificationmentioning

confidence: 99%

See 1 more Smart Citation

Indoor Mobile Network Planning by Utilizing B5G/6G mmWave and Sub-THz Bands

Sayed Ahmed,

El-Badawy,

Zainud-Deen

et al. 2024

Menoufia Journal of Electronic Engineering Research

View full text Add to dashboard Cite

Nowadays, there is a tremendous discussion of the B5G/6G air interface and its different propagation models that are suitable for the mid and high bands (mmWave) spectrum. The key RF characteristics and planning parameters are traffic types, propagation modeling, and techniques for estimating system throughput and capacity. The goal of this research is to describe initial planning and radio deployment perspectives for the implementation of B5G/6G new radio (NR) technology in indoor scenario. This scenario is suitable to predict and design the modern mobile networks inside administrative new capital known as "Knowledge City". In addition, This paper study and compare the path loss while using three different path loss propagation models close-in (CI), floating intercept (FI) and alpha-beta-gamma (ABG) model inside a building at different frequency bands 28 GHz, 73 GHz, and 300 GHz where the signal effected by distances, obstacles and surrounded environment. The case study is in indoor conference meeting room inside a building in one of the "Knowledge City in New Administrative Capital" that can accommodate up to 80 people, where the antennas can operate with each other directly line-of-sight (LOS) or are obstructed non-line-of-sight (NLOS). Also, antennas use matched polarization vertical to vertical direction (V-V). The paper also proposed coverage and capacity network planning model for indoor radio networks using highfrequency bands in the mmWave and sub-THz ranges.

show abstract

Section: Model Verificationmentioning

confidence: 99%

Section: Model Verificationmentioning

confidence: 99%

Indoor Mobile Network Planning by Utilizing B5G/6G mmWave and Sub-THz Bands

Sayed Ahmed,

El-Badawy,

Zainud-Deen

et al. 2024

Menoufia Journal of Electronic Engineering Research

View full text Add to dashboard Cite

show abstract

“…The conventional procedure for calibration is to disconnect the antennas from the channel sounder and to calibrate the RF front ends between the antenna ports and the antennas separately. 1 To calibrate the front ends, a full two-port calibration is prescribed for vector network analyzer (VNA)-based systems [8], [13], [16]; other correlation-based systems employ a back-to-back method [9]- [12], [15]. These calibration procedures have been well established for years and so are relatively standard and straightforward, yet some do not calibrate the front ends at all [4]- [7].…”

Section: Introductionmentioning

confidence: 99%

“…And to enable precision antenna de-embedding, it is spherical angle (AZ and EL) that must be estimated, yet only a few papers do [9]- [11], [16] -the others either estimate AZ only [12], [13] or no angle at all. Finally, although an antenna may be classified as omnidirectional [15], antenna gain is never truly omnidirectional in both planes and so its effects on estimated path gain cannot be ignored.…”

Section: Introductionmentioning

confidence: 99%

“…In any case, when different channel sounders are deployed by different organizations to record measurements [14], a meaningful comparison across bands is difficult to obtain since specific calibration procedures will vary from organization to organization. This is true even when different channel sounders are used by the same organization [4]- [8], [15] since calibration is never perfect. The comparison is more meaningful when the same organization uses the same channel sounder across all bands, albeit with different antennas [9]- [12].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Methodology for Measuring the Frequency Dependence of Multipath Channels Across the Millimeter-Wave Spectrum

Güven

Jamroz

Chuang

et al. 2022

IEEE Open J. Antennas Propag.

View full text Add to dashboard Cite

Millimeter-wave (mmWave) communications promise Gigabit/s data rates thanks to the availability of large swaths of bandwidth between 10-100 GHz. Although cellular operators prefer the lower portions of the spectrum due to popular belief that propagation there is more favorable, the measurement campaigns to confirm this -conducted by ten organizations thus far -report conflicting results. Yet it is not clear whether the conflict can be attributed to the channel itself -measured in different environments and at different center frequencies -or to the differences in the organizations' channel sounders and sounding techniques. In this paper, we propose a methodology to measure mmWave frequency dependence, using the 26.5-40 GHz band as an example. The methodology emphasizes calibration of the equipment so that the measurement results represent the channel alone (and not the channel coupled with the channel sounder). Our results confirm that free-space propagation is indeed frequency invariant -a well understood phenomena but to our knowledge reported nowhere else at mmWave to date. More interestingly, we found that specular paths -the strongest after the line-of-sight path and so pivotal to maintaining connectivity during blockage -are the least invariant compared to weaker diffracted and diffuse paths.

show abstract