Outdoor-Indoor Propagation Measurements and Link Performance in the VHF/UHF Bands

Karam, M.; Turney, W.; Baum, K.L.; Sartori, P.; Malek, L.

doi:10.1109/vetecf.2008.66

Cited by 12 publications

(6 citation statements)

References 15 publications

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“…Previously reported VHF and UHF RMS delay spreads have been observed to be typically in ranges of 100 ns to 2 µs at distances of up to 2 km in various urban settings [12], [13], [14], [15] though occasionally reaching 5 µs when indoor-outdoor transitions are included [16]. In contrast, the delay spreads in mountainous regions at VHF have achieved 8 µs [13] to 30 µs [17].…”

Section: Vhf / Uhf Propagation and Iot Use Casesmentioning

confidence: 99%

Design and field trial measurement results for a portable and low‐cost very‐high‐frequency/ultra‐high‐frequency channel sounder platform for Internet of things propagation research

Ball

2019

IET Microwaves, Antennas & Propagation

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Propagation research is vital for informing the design of reliable very high‐frequency and ultra‐high‐frequency communications systems for the Internet of things. In this study, a cost‐effective and highly portable system is proposed and then used to obtain propagation measurements in city and suburban scenarios at 71 and 869.525 MHz. The system calculates the received power, power delay profile and channel frequency response. The portable sounding receiver uses readily available parts: an RTL‐SDR (covering 27 MHz–1.7 GHz) and a Raspberry Pi with a touchscreen. The Pi implements all the channel sounding signal processing algorithms in Python, in near real time. Extracted propagation data and models are presented, from example city and suburban field trials incorporating pedestrian and car use.

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Section: Vhf / Uhf Propagation and Iot Use Casesmentioning

confidence: 99%

Design and field trial measurement results for a portable and low‐cost very‐high‐frequency/ultra‐high‐frequency channel sounder platform for Internet of things propagation research

Ball

2019

IET Microwaves, Antennas & Propagation

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“…[2,3]), recently including short range applications [4]. RMS delay spreads in the VHF and UHF bands have been observed to be typically in ranges of 100ns to 2µs at distances of up to 2km in various urban settings [5,6,7] though occasionally reaching 5µs when indoor-outdoor transitions are included [8]. VHF delay spreads in mountainous regions have been seen to reach 8µs [6] to 30µs [9].…”

Section: Vhf / Uhf Propagation and Iot Use-casesmentioning

confidence: 99%

Portable and Low Cost Channel Sounding Platform for VHF / UHF IoT Propagation Research

Ball

2017

Loughborough Antennas &Amp; Propagation Conference (LAPC 2017)

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This paper presents work into realising a cost-effective and portable platform to support Internet of Things (IoT) propagation research at VHF and UHF. The sounding receiver uses a low cost RTL-SDR, Raspberry Pi and touchscreen. The platform runs dedicated channel sounding DSP algorithms written in Python. The resulting platform is a portable and convenient propagation measurement tool, covering 27MHz to 1.7GHz. Initial results from a city measurement campaign at 71MHz and 869.525MHz are presented, showing channel response and interference.

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“…The parameters we used in the rest of this work are detailed in Table I. We note that these values are common in literature, and assumed as realistic by several works [5] [15], and the technical group on 802.11n [13], and show the better obstacle penetration lower frequencies have, compared to the upper bands.…”

Section: A Pathloss and Shadowingmentioning

confidence: 99%

Cognitive modulation and coding scheme adaptation for 802.11n and 802.11af networks

Bedogni

Felice

Malabocchia

et al. 2014

2014 IEEE Globecom Workshops (GC Wkshps)

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In the recent years, wireless communication experienced a huge growth, and nowadays many services are built on top of it. Much of the user demands comes from indoor environments, in which obstructions like walls and floors decrease the received signal to levels not suitable for reliable and high speed communication. Recently, national regulators worldwide started to investigate the usage of TV bands, thanks to the switch from analog to digital TV. These regulations gave birth to different wireless standards to make use of this new opportunistic spectrum. In this paper, we show how different 802.11 standard behave in indoor environment. Namely, we analyze IEEE 802.11n networks in the 2.4 GHz band, and IEEE 802.11af in the TV band, by means of theoretical analisys and simulations. Then, we design an algorithm that leverages the use of the different IEEE 802.11 amendments, by monitoring the achievable data rates with respect to the packet-error-rate, and provide simulation results on its performance on different modeled scenarios.

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Outdoor-Indoor Propagation Measurements and Link Performance in the VHF/UHF Bands

Cited by 12 publications

References 15 publications

Design and field trial measurement results for a portable and low‐cost very‐high‐frequency/ultra‐high‐frequency channel sounder platform for Internet of things propagation research

Design and field trial measurement results for a portable and low‐cost very‐high‐frequency/ultra‐high‐frequency channel sounder platform for Internet of things propagation research

Portable and Low Cost Channel Sounding Platform for VHF / UHF IoT Propagation Research

Cognitive modulation and coding scheme adaptation for 802.11n and 802.11af networks

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