Investigations on fading scaling with bandwidth and directivity at 60 GHz

Dupleich, Diego; Iqbal, Naveed; Schneider, Christian; Haefner, Stephan; Müller, Robert; Skoblikov, Sergii; Luo, Jian; Thomä, Reiner S.

doi:10.23919/eucap.2017.7928451

Cited by 17 publications

(13 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They observe high Rician K-factors even at non-line-of-sight (NLOS). This effect is explained by spatial filtering of directive antennas, as they suppress many multipath components [25]. Outdoor measurements in [28,29], show a graphical agreement with the Rice fit, but especially Fig.…”

Section: Related Workmentioning

confidence: 66%

“…The authors of [25] investigated a simple wall scattering scenario and analysed how fading scales with various antenna directivities and different bandwidths. Increasing directivity [25], as well as increasing bandwidth [25,26], results in an increased Rician K-factor. The authors of [27] analysed fading at 28 GHz with high gain horn antennas on both link ends.…”

Section: Related Workmentioning

confidence: 99%

See 1 more Smart Citation

Better than Rician: modelling millimetre wave channels as two-wave with diffuse power

Zöchmann

Caban

Mecklenbräuker

et al. 2019

J Wireless Com Network

View full text Add to dashboard Cite

This contribution provides experimental evidence for the two-wave with diffuse power (TWDP) fading model. We have conducted two indoor millimetre wave measurement campaigns with directive horn antennas at both link ends. One horn antenna is mounted in a corner of our laboratory, while the other is steerable and scans azimuth and elevation. Our first measurement campaign is based on scalar network analysis with 7 GHz of bandwidth. Our second measurement campaign obtains magnitude and phase information, additionally sampled directionally at several positions in space. We apply Akaike's information criterion to decide whether Rician fading sufficiently explains the data or the generalized TWDP fading model is necessary. Our results indicate that the TWDP fading hypothesis is favoured over Rician fading in situations where the steerable antenna is pointing towards reflecting objects or is slightly misaligned at line-ofsight. We demonstrate TWDP fading in several different domains, namely, frequency, space, and time.few with dielectric lenses [21][22][23]. When the link-quality depends so much on the achieved beam-forming gain, antennas must be considered as part of the wireless channel again. Small-scale fading is then influenced by the antenna.According to Durgin [24, p. 137], "The use of directive antennas or arrays at a receiver, for example, amplifies several of the strongest multipath waves that arrive in one particular direction while attenuating the remaining waves. This effectively increases the ratio of specular to nonspecular received power, turning a Rayleigh or Rician fading channel into a TWDP fading channel." The mentioned two-wave with diffuse power (TWDP) fading channel describes this spatial filtering effect by two non-fluctuating receive signals together with many smaller diffuse components.

show abstract

Section: Related Workmentioning

confidence: 66%

Section: Related Workmentioning

confidence: 99%

Better than Rician: modelling millimetre wave channels as two-wave with diffuse power

Zöchmann

Caban

Mecklenbräuker

et al. 2019

J Wireless Com Network

View full text Add to dashboard Cite

show abstract

“…It was reported that log-normal distribution had a good fit to measured received signal envelopes in some indoor mobile radio channels [59]. Important work on wideband directional small-scale fading also appears in [60]- [64]. In the following subsections, small-scale fading distributions…”

Section: Small-scale Spatial Statistics a Introduction Of Small-mentioning

confidence: 93%

Small-Scale, Local Area, and Transitional Millimeter Wave Propagation for 5G Communications

Rappaport

MacCartney

Sun

et al. 2017

IEEE Trans. Antennas Propagat.

137

121

View full text Add to dashboard Cite

This paper studies radio propagation mechanisms that impact handoffs, air interface design, beam steering, and MIMO for 5G mobile communication systems. Knife edge diffraction (KED) and a creeping wave linear model are shown to predict diffraction loss around typical building objects from 10 to 26 GHz, and human blockage measurements at 73 GHz are shown to fit a double knifeedge diffraction (DKED) model which incorporates antenna gains. Small-scale spatial fading of millimeter wave received signal voltage amplitude is generally Ricean-distributed for both omnidirectional and directional receive antenna patterns under both line-of-sight (LOS) and non-line-of-sight (NLOS) conditions in most cases, although the log-normal distribution fits measured data better for the omnidirectional receive antenna pattern in the NLOS environment. Small-scale spatial autocorrelations of received voltage amplitudes are shown to fit sinusoidal exponential and exponential functions for LOS and NLOS environments, respectively, with small decorrelation distances of 0.27 cm to 13.6 cm (smaller than the size of a handset) that are favorable for spatial multiplexing. Local area measurements using cluster and route scenarios show how the received signal changes as the mobile moves and transitions from LOS to NLOS locations, with reasonably stationary signal levels within clusters. Wideband mmWave power levels are shown to fade from 0.4 dB/ms to 40 dB/s, depending on travel speed and surroundings.

show abstract

“…Such discussions are beyond the scope this work. For detailed analysis on the impact of the system assumptions on the radio channel properties, we refer the interested reader to our earlier work (e.g., [39], [40], and references therein).…”

Section: Introductionmentioning

confidence: 99%

Multi-Band Vehicle-to-Vehicle Channel Characterization in the Presence of Vehicle Blockage

et al. 2019

Self Cite

View full text Add to dashboard Cite

Vehicle-to-vehicle (V2V) channels exhibit unique properties due to the highly dynamic environment and low elevation of the antennas at both ends of the link. Of particular importance for the behavior of V2V channels, and consequent reliability of the communication link, is the severity and dynamics of blockage of both the line-of-sight and other multipath components (MPCs). The characteristics of blockage become more important as the carrier frequency increases, and the ability of the signal to penetrate through objects diminishes. To characterize the effects of vehicle blockage, we performed V2V channel measurements in four different frequency bands (6.75, 30, 60, and 73 GHz) in urban and highway scenarios. We analyzed the impact of the blocker size and position on the received power and fast fading parameters, as well as the frequency dependence of these parameters under blockage. Our results show that there is a strong influence of the size of the blocking vehicle on the blockage loss and the angular/delay spread. The position of the blocker relative to the transmitter and receiver also plays an important role. On the other hand, the frequency dependence is quite limited, with the blockage loss increasing slightly and the number of scattered MPCs reducing slightly as frequency increases. The main conclusion of this paper is that V2V communication will be possible in high (millimeter-wave) frequencies, even in the case of blockage by other vehicles. INDEX TERMS V2V, channel modeling, mmWave, cmWave, multi-band measurements, blockage.

show abstract

Investigations on fading scaling with bandwidth and directivity at 60 GHz

Cited by 17 publications

References 8 publications

Better than Rician: modelling millimetre wave channels as two-wave with diffuse power

Better than Rician: modelling millimetre wave channels as two-wave with diffuse power

Small-Scale, Local Area, and Transitional Millimeter Wave Propagation for 5G Communications

Multi-Band Vehicle-to-Vehicle Channel Characterization in the Presence of Vehicle Blockage

Contact Info

Product

Resources

About