A Measurement-Based Model for Outdoor Near-Ground Ultrawideband Channels

Sangodoyin, Seun; Niranjayan, S.; Molisch, Andreas F.

doi:10.1109/tap.2015.2505004

Cited by 31 publications

(27 citation statements)

References 46 publications

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“…The mean root mean square delay spread values increase with the increasing distance between the transmitter and the receiver. A similar trend is observed in [31]. The relation between the mean root mean square delay spread and the distance can be fitted with linear mode σ τ UHF,H = 20d+27 for ultra high frequency with horizontal co-polarization, σ τ UHF,V = 15d + 55 for ultra high frequency with vertical co-polarization, σ τ SHF,H = 34d − 33 for super high frequency with horizontal co-polarization, and σ τ SHF,V = 25d + 15 for super high frequency with vertical co-polarization, where d is the distance between the transmitter and the receiver in kilometers.…”

Section: Root Mean Square Delay Spreadsupporting

confidence: 87%

Wideband UHF and SHF long-range channel characterization

Kassem

Blumenstein

Povalač

et al. 2019

J Wireless Com Network

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This paper presents an outdoor long-range (from 315 m up to 5.3 km) fixed channel campaign for both ultra high frequency and super high frequency bands with co-polarized horizontal and vertical antenna configurations. It investigates the channel characteristics of device to device communication scenarios underlaying the 5th generation networks by providing detailed research. Both line of sight and non-line of sight measurements in 1.3 GHz and 5.8 GHz frequency bands with bandwidth up to 600 MHz were conducted. The path loss, root mean square delay spread, coherence bandwidth, and channel frequency response variation are characterized. We observed that the variation is negligible in microcell line of sight environment for both above mentioned frequencies, whereas it significantly increases with frequency in different macrocell non-line of sight environments. The distance dependency of path loss was also derived. It was observed that the root mean square delay spread decreases with frequency for both line of sight microcell and non-line of sight macrocell measurements. A dependency between the root mean square delay spread and transmitter-receiver distance in non-line of sight environments was also captured. The relation between the coherence bandwidth and the root mean square delay spread was depicted. It demonstrates an exponential function in all considered channel combinations.

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Section: Root Mean Square Delay Spreadsupporting

confidence: 87%

Wideband UHF and SHF long-range channel characterization

Kassem

Blumenstein

Povalač

et al. 2019

J Wireless Com Network

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“…Several channel measurement works such as [15], [16] have described the SSF statistics as either lognormal, Rician, Rayleigh or m-Nakagami distributed (with an analysis of the Nakagami fading in the same environment as this work provided in [3]), however in this work, the SSF statistics was modeled as Rician distribution with the K-factor parameter computed using the method of moments as described by Eqs. (1)- (9) in [17].…”

Section: Small-scale Fading Analysismentioning

confidence: 99%

System Performance Assessment in Dual-Band Device-to-Device MIMO Channels

Sangodoyin

Virk

Burghal

et al. 2019

ICC 2019 - 2019 IEEE International Conference on Communications (ICC)

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Device-to-Device (D2D) communications has been embraced as a novel approach for extending coverage in fifthgeneration (5G and beyond) wireless networks. Throughput and reliability assessment of such wireless networks are therefore of utmost importance for D2D communication systems design. In this paper, we consider the capacity results of wireless propagation channels in two 5G modes namely the sub-6 GHz centimeter-wave (cm-wave) and 60 GHz millimeter-wave (mmwave) bands for a multiple-input-multiple-output (MIMO) D2D fading channel. Results presented in this paper were obtained from propagation channel measurements jointly conducted in both cm-wave (2-6 GHz) and mm-wave (59-63 GHz) bands using an 8 ⇥ 8 MIMO virtual array setup in an outdoor environment. These measurements were conducted at the exact same locations (with constituents unchanged) in both cm-wave and mm-wave bands for comparability of results. Capacity values were computed using two power policies (with and without channel state information (CSI)). We also investigated the eigenmode spectral structure to understand the spatial correlatedness of the channel and the Rician K-factor to analyze small-scale fading in the channel. The results presented in this paper can be used by wireless systems designer for assessing the performance of D2D systems operating in the cm-wave and/or mm-wave bands for this type of environment.

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“…This model gives a statistical distribution for the path gains based on a UWB propagation experiment. Because of the frequency sensitivity of the UWB channel, the pulse shapes with different excess delays are path-dependent [9]. Also, it is assumed that the pulse shapes associated with all the propagation paths are identical.…”

Section: Channel Modelmentioning

confidence: 99%

Performance Analysis of PN Code Acquisition with MIMO Scheme for an UWB TH/CDMA System

Hwang

Kim

2018

Wireless Communications and Mobile Computing

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This paper presents performance and its simulation results of pseudonoise (PN) code acquisition scheme with MIMO scheme for an ultra-wideband time-hopping/code-division-multiple-access (UWB TH/CDMA) system. The transmission channel is modelled as a frequency selective lognormal fading channel. In almost practical PN code acquisition system, the existence of more than two synchronous cells in the uncertainty region of the search process is possible due to multipath effect. Therefore, based on deriving the detection probability, false alarm rate, miss detection probability, and mean acquisition time, the acquisition performance is analyzed under the hypothesis of multiple synchronous states (cells) in the uncertainty region of the PN code. And the code acquisition performance is evaluated when the correlator outputs are noncoherently combined by using equal gain combining (EGC) scheme. In this procedure, the closed form for the conditional probability of decision variable is derived using the Gauss-Hermite quadrature formula. The performance comparison of the scheme mentioned above shows that the code acquisition performance with the diversity combining technique, especially when increasing the number of antenna, is more robust than that using no diversity. And code acquisition performance comparison also shows that if the detection threshold is set inappropriately, the performance might be degraded, even if an antenna diversity method is applied. It is also shown that Tx diversity can improve the acquisition performance but not as much as Rx diversity does. And Rx diversity can be applied to the acquisition system for additional diversity gain if the complexity of the receiver can be accepted.

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A Measurement-Based Model for Outdoor Near-Ground Ultrawideband Channels

Cited by 31 publications

References 46 publications

Wideband UHF and SHF long-range channel characterization

Wideband UHF and SHF long-range channel characterization

System Performance Assessment in Dual-Band Device-to-Device MIMO Channels

Performance Analysis of PN Code Acquisition with MIMO Scheme for an UWB TH/CDMA System

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