Path-loss model for broadcasting applications and outdoor communication systems in the VHF and UHF bands

Pérez‐Vega, C.; Zamanillo, J. M.

doi:10.1109/tbc.2002.1021273

Cited by 45 publications

(29 citation statements)

References 5 publications

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“…As this model does not take into account the antenna height difference (which was approximately 400m between the transmitter and the USRP receiver), a second calculation was performed using the Perez-Vega Zamanillo / FCC F(50,50) free space VHF model for comparison. A MATLAB implementation was created based on [24], and this showed the expected receive power to be 24 W/ -16.2 dBm. While the F(50,50) model is likely more accurate, it was noted that neither it nor the Friis model take into account the geography of the transmit channel, so some further attenuation should be expected.…”

Section: Design Of An Fs-fbmc Transmittermentioning

confidence: 99%

Secondary User Access for IoT Applications in the FM Radio Band using FS-FBMC

Barlee

Stewart

Crockett

2018

2018 IEEE 5G World Forum (5GWF)

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In this paper a Dynamic Spectrum Access (DSA) Physical layer (PHY) technique is proposed that allows Secondary User (SU) access to the traditional FM Radio spectrum (88-108 MHz) for alternative data communication applications. FM radio waves have excellent propagation characteristics for long distance transmission, and have high levels of penetration through buildings. Using tools such as a structured geolocation database of licensed Primary User (PU) FM Radio transmitters, unlicensed SUs can access portions of the 20 MHz-wide band and transmit signals that place spectral 'holes' with suitable guard bands around all known PUs. Based on the PU protection ratios published by Ofcom and the FCC, the operation of a FBMC (Filter Bank Multi-Carrier) transmitter is demonstrated for an urban environment, and through 'field test' simulation it is shown that the Out Of Band (OOB) leakage of the proposed PHY (energy in the 'holes' that can interfere with the PU) is 47 dB lower than that of using an equivalent OFDM PHY. The results show that the proposed PHY is a suitable candidate for DSA-SU communication (e.g. in smart city IoT applications), whilst ensuring the integrity of incumbent PU signals.

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Section: Design Of An Fs-fbmc Transmittermentioning

confidence: 99%

Secondary User Access for IoT Applications in the FM Radio Band using FS-FBMC

Barlee

Stewart

Crockett

2018

2018 IEEE 5G World Forum (5GWF)

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“…The path loss model presented in [24] is independent of frequency and is applicable to outdoor environments in a range of distances from about 800 m to 65 km and transmitting antenna heights from 100 ft (30.48 m) up to 2000 ft (609.6 m), and is based on a receiving antenna height of 30 ft (9 m). This model is not applicable for ground-to-ground communications.…”

Section: E) Scenario 5: Outdoor-to-indoor Propagationmentioning

confidence: 99%

VHF General Urban Path Loss Model for Short Range Ground-to-Ground Communications

Andrusenko

Miller

Abrahamson

et al. 2008

IEEE Trans. Antennas Propagat.

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From a radio frequency propagation perspective, the general focus of the commercial wireless communications community has been primarily on frequencies above 800 MHz. Therefore, there is a limited number of available empirical data and validated prediction methods indicating what type of path loss or signal degradation one should expect in various urban settings at a very high frequency (VHF) range, which is the range of operation for numerous military tactical communications systems. Furthermore, the extensive literature survey revealed that indoor propagation models are particularly lacking in either availability and/or proven fidelity. This paper presents a new general urban path loss model derived from a log-distance path loss model, floor attenuation factor model and path loss measurements taken on campus of The Johns Hopkins University Applied Physics Laboratory (JHU/ APL), Laurel, MD, with a measurement hardware suite in 30-88 MHz frequency range. The authors felt that there is a void in the open literature on simple, empirically-verified large-scale path loss models that implicitly address the lower VHF range, more than one urban setting, short communications ranges ( 1 km) and low transmitting and receiving antenna heights as well as offer reasonably high fidelity without requiring a lot of information about the site.Index Terms-Ground-to-ground communications, indoor propagation, land mobile, land mobile to land mobile communications, low antenna height, military tactical communications, military operations on urban terrain (MOUT), path loss, peer to peer communications, radio frequency (RF) propagation prediction, short range communications, single channel ground and airborne radio system (SINCGARS), squad radio, urban canyon, very high frequency (VHF) , wireless communications.

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“…Urban path-loss models in the upper VHF and military UHF bands based on field measurements have been presented in [1], [13]. Similar path-loss models in the lower VHF range have also been proposed [2], [14], [15].…”

Section: Introductionmentioning

confidence: 99%

Short-Range Low-VHF Channel Characterization in Cluttered Environments

Dagefu

Verma

Rao

et al. 2015

IEEE Trans. Antennas Propagat.

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The lower VHF band has potential for low-power, short-range communications, as well as for geolocation applications, in both indoor and urban environments. Most prior work at low VHF focuses on longer range path loss modeling, often with one node elevated. In this paper, we study indoor/outdoor nearground scenarios through experiments and electromagnetic wave propagation simulations. These include the effects of indoor penetration through walls and obstacles, as well as indoor/outdoor cases, for both line of sight (LoS) and nonLoS (NLoS), at ranges up to 200 m. Mounting our receiver (Rx) on a robotic platform enabled the collection of thousands of measurements over an extended indoor/outdoor test area. We measure the channel transfer function, employing bandpass waveform sampling, with pulse and tone probe signals. Based on statistical tests, we show that the measured channels have a nearly ideal scalar attenuation and delay transfer function, with minimal phase distortion, and little to no evidence of multipath propagation. Compared with higher VHF and above, the measured short-range VHF channels do not exhibit small-scale fading, which simplifies communications Rx signal processing, and enables phase-based geolocation techniques.

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Path-loss model for broadcasting applications and outdoor communication systems in the VHF and UHF bands

Cited by 45 publications

References 5 publications

Secondary User Access for IoT Applications in the FM Radio Band using FS-FBMC

Secondary User Access for IoT Applications in the FM Radio Band using FS-FBMC

VHF General Urban Path Loss Model for Short Range Ground-to-Ground Communications

Short-Range Low-VHF Channel Characterization in Cluttered Environments

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