Radio channel propagation measurements using a multiband agile chirp sounder

Salous, Sana; Cheema, Adnan Ahmad; Raimundo, Xavier

doi:10.1109/ursigass.2014.6929650

Cited by 4 publications

(7 citation statements)

References 1 publication

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“…The femtocell operating scenario was retained. The channel sounder in [17] was used with a 500 MHz channel bandwidth and 1.2 kHz repetition rate to log a total of 30 data points covering line of sight, as well as one and two brick walls. The measurements are limited to a maximum of 33 m, due to the physical restrictions imposed by nearby buildings.…”

Section: Results and Analysismentioning

confidence: 99%

“…We derive a model that incorporates indoor signal attenuation as a key parameter, and also investigate the channel shadowing parameters, where results are conveniently obtained as a consequence of using the SVD method. We validate our proposed empirical models against those in [13] and against independently measured path loss data using the University of Durham's channel sounder described in [17].…”

Section: Introductionmentioning

confidence: 99%

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Indoor‐to‐outdoor empirical path loss modelling for femtocell networks at 0.9, 2, 2.5 and 3.5 GHz using singular value decomposition

Allen¹,

Mahato

Gao

et al. 2017

IET Microwaves, Antennas & Propagation

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Two empirical indoor‐to‐outdoor path loss models to facilitate femtocell network deployment are derived from continuous wave power measurements. A large set of indoor–outdoor transmitter locations in two residential streets in an urban setting and operating at 900 MHz, 2 GHz, 2.5 GHz and 3.5 GHz have been used to derive the model parameters by using singular value decomposition (SVD). The path loss models have been compared and validated against existing models as well as independent measurement data and good comparison is shown. The root mean square error of the residual path loss data obtained from the measurement data, which directly relates to the channel shadowing characteristics, is compared and validated with known results and has led to new model parameters being proposed. The expressions derived from the modelling can be used in system‐level simulators, as well as for shadowing interference analysis of two‐tier heterogeneous networks operating in indoor–outdoor scenarios at or close to the operating frequencies considered. In this study, the models extend the operating frequency range compared to related models and introduce SVD as a convenient means of deriving parameters from measured path loss data.

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Section: Results and Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Indoor‐to‐outdoor empirical path loss modelling for femtocell networks at 0.9, 2, 2.5 and 3.5 GHz using singular value decomposition

Allen¹,

Mahato

Gao

et al. 2017

IET Microwaves, Antennas & Propagation

View full text Add to dashboard Cite

show abstract

“…The VNA can be employed in indoor measurements where the channel characteristics are assumed to be time-invariant for the duration of the sweep, or for CW measurements for the evaluation of narrowband transmissions. Wideband measurements with a large number of frequency samples requires long sweep times and can lead to a dispersed response due to movement [9]. In addition to the duration of the sweep, VNA's require the use of long cables since both the transmitter and receiver need to be connected to the same unit which reduces the range of the measurement or require an external amplifier to compensate for cable loss.…”

Section: Mm-wave Channel Soundingmentioning

confidence: 99%

“…A custom designed sounder on the other hand can use separate transmitters and receivers and allow for outdoor cellular measurements as well as outdoor to indoor measurements and between floors. Such sounders use two different types of waveforms: continuous waveform with a Pseudo-Random Binary Sequence (PRBS) [41][42] [50] and frequency modulated continuous wave (FMCW) [9][51] [52]. Using a sliding correlator in a PRBS sounder or a heterodyne detector at the receiver in a FMCW sounder compresses the bandwidth of the detected signal thereby alleviating the data acquisition requirements.…”

Section: Mm-wave Channel Soundingmentioning

confidence: 99%

“…The need for new channel models to support 5G networks planning has been recently reaffirmed during the 3GPP RAN Workshop on 5G held in Phoenix [8]. While significant studies of the channel characteristics are available in the 60 GHz band for indoor and short-range scenarios, and more recently for body networks [9] for secure communication, only a few trials have been conducted in other mm-wave bands and for outdoor, outdoor-indoor, and scenarios with mobility [10]- [15].…”

Section: Introductionmentioning

confidence: 99%

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Millimeter-Wave Propagation: Characterization and modeling toward fifth-generation systems. [Wireless Corner]

Salous

Degli-Esposti²,

Fuschini

et al. 2016

IEEE Antennas Propag. Mag.

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Abstract-The World Radiocommunications Conference WRC15 identified a number of frequency bands between 24-86 GHz as candidate frequencies for future cellular networks. In this paper an extensive review of propagation characteristics and challenges related to the use of millimetre wave in future wireless systems is presented. Reference to existing path loss models including atmospheric and material attenuation in recommendations of the International Telecommunication Union is given and the need for new multidimensional models and measurements is identified. A description of state of the art mm wave channel sounders for single and multiple antenna measurements is followed by a discussion of the most recent deterministic, semi-deterministic and stochastic propagation and channel models. Finally, standardization issues are outlined with recommendations for future research.

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A Portable 28-GHz Channel Sounder Platform and Measurement Results From Close-to-Ground Field Tests

Ball

Joseph

2023

IEEE Open J. Instrum. Meas.

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This article describes a novel, bespoke, and low-cost 28 GHz RF TX and RX front end design that has been combined with a commercial Software Defined Radio and Raspberry Pi controller to realize a portable propagation measurement system for the 28 GHz band. The complete sounder system can resolve an impulse from RX powers down to -107 dBm (3 dB impulse SNR) and the sounder TX can generate a signal of -8 dBm. Therefore, using 20 dBi antennas supports path loss measurements of 139 dB. The sounder can resolve time domain reflections to 33 ns in a channel measurement bandwidth of 60 MHz, producing both time domain and frequency domain results. The complete sounding system has been used to perform close-to-ground RF channel measurements, with propagation loss models and time domain impulses extracted. Close-to-ground measurement is an underreported area of propagation research that is relevant for novel use-cases, such as in military applications or for mobile device-to-device communications. A key initial finding from the trials is that the path losses for 28 GHz indoor and outdoor links at circa 70 cm above ground seem close to that of free space, with very few strong reflections with delays exceeding 33 ns.

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Radio channel propagation measurements using a multiband agile chirp sounder

Cited by 4 publications

References 1 publication

Indoor‐to‐outdoor empirical path loss modelling for femtocell networks at 0.9, 2, 2.5 and 3.5 GHz using singular value decomposition

Indoor‐to‐outdoor empirical path loss modelling for femtocell networks at 0.9, 2, 2.5 and 3.5 GHz using singular value decomposition

Millimeter-Wave Propagation: Characterization and modeling toward fifth-generation systems. [Wireless Corner]

A Portable 28-GHz Channel Sounder Platform and Measurement Results From Close-to-Ground Field Tests

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