Antenna Deembedding for mmWave Propagation Modeling and Field Measurement Validation at 73 GHz

Zhang, Ruonan; Zhou, Yuliang; Lu, Xiaofeng; Cao, Chang; Guo, Qi

doi:10.1109/tmtt.2017.2743702

Cited by 13 publications

(7 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…e RX was placed 1, 2.5, and 5.5 meters away from the window along a straight line in the rooms on the 5th and 7th floors, as illustrated in Figure 3. At each position, the receiving antenna was raised to the heights of 0.5, 1.5, and 2.5 m. It was rotated around with the step of the HPBW of 10°, to capture the received power at the directions [20]. As illustrative examples, the angular power profiles at the three measurement positions are plotted in Figure 4.…”

Section: Spatial Propagation Measurement For O2i Coverage At 28mentioning

confidence: 99%

Outdoor-to-Indoor Channel Measurement and Coverage Analysis for 5G Typical Spectrums

Zhong

Zhao

2019

International Journal of Antennas and Propagation

View full text Add to dashboard Cite

The fifth-generation (5G) mobile communications system will adopt the millimeter wave (mmWave) band for outdoor-to-indoor (O2I) coverage to achieve ultrahigh data rate. However, it is a challenging task because of the large path loss and almost total blocking by building walls. In this work, we performed extensive measurements on the O2I propagation at 3.5, 4.9, and 28 GHz simultaneously by using a multiband channel sounder. We captured the path loss distribution and angular power arrival profiles. We also measured the penetration loss at 28 GHz through different kinds of glass windows. The widely adopted ordinary glass windows introduce the penetration loss of 3 to 12 dB that is acceptable and makes mmWave O2I coverage feasible. But the low-emissivity (low-E) windows that will be more popular in the future introduce 10 dB higher loss. The measurement results in this work can help analyse and anticipate the O2I coverage by mmWave, which is important for the design and deployment of the 5G network.

show abstract

Section: Spatial Propagation Measurement For O2i Coverage At 28mentioning

confidence: 99%

Outdoor-to-Indoor Channel Measurement and Coverage Analysis for 5G Typical Spectrums

Zhong

Zhao

2019

International Journal of Antennas and Propagation

View full text Add to dashboard Cite

show abstract

“…[8] investigated how to reconstruct the power delay profile seen by an omni-directional antenna based on directional scanning measurements. A technique was proposed in [9] to de-embed the antenna pattern from captured channel profiles to obtain propagation channel. In [10], it was numerically demonstrated that the multipath parameter estimation accuracy is related to the ratio of the antenna half power beamwidth (HPBW) to Wei Fan, Fengchun Zhang, Ole K. Jensen and Gert F. Pedersen are with the Antenna Propagation and Millimeter-wave Systems (APMS) section, Department of Electronic Systems, Aalborg University, 9220 Aalborg, Denmark.…”

Section: Introductionmentioning

confidence: 99%

“…The first one is introduced by non-ideal antenna radiation pattern (i.e. wide beamwidth for the main beam and undesired high side-lobes) [9], [10]. In practical measurements, antenna pattern of the measurement antenna often cannot be de-embedded from the measured data easily.…”

Section: Introductionmentioning

confidence: 99%

On Angular Sampling Intervals for Reconstructing Wideband Channel Spatial Profiles in Directional Scanning Measurements

Fan

Zhang

Wang

et al. 2020

IEEE Trans. Veh. Technol.

View full text Add to dashboard Cite

Directional scanning measurement is the dominant strategy taken to measure channel spatial profiles for millimeter wave (mmWave) frequency bands. The focus of the paper is on wideband channel spatial profile reconstruction and angular sampling interval (ASI) selection for directional scanning measurement. We propose to employ the trigonometric interpolation technique to reconstruct the spatial channel profile and to use Nyquist sampling theorem and spherical wave mode theory to determine the ASI. Our analysis demonstrated that the half-power beam width (HPBW) of the antenna is a good approximation for the ASI setting to ensure accurate directional scanning measurements. The reconstructed power-angle-delay profile (PADP), composite power angular spectrum (PAS), delay and angle characteristics match well with those of the target in the measured data when the ASI is set to the antenna HPBW.

show abstract

“…Although, mMIMO mmWave systems are very promising, they still face some difficulties such as: the mmWave mMIMO channels tend to be more correlated [5][6][7]; the power consumption of some hardware components of radio frequency (RF) chains, such as analog-to-digital converters (ADCs), digital-to-analog converters (DACs), mixers, power amplifiers, is higher; and the cost of some hardware components of the referred RF chains is also higher. Therefore, new techniques that consider the specific characteristics of the channel and hardware constraints should be explored.…”

Section: Introductionmentioning

confidence: 99%

Multiuser Equalizer for Hybrid Massive MIMO mmWave CE-OFDM Systems

et al. 2019

View full text Add to dashboard Cite

This paper considers a multiuser broadband uplink massive multiple input multiple output (MIMO) millimeter-wave (mmWave) system. The constant envelope orthogonal frequency division multiplexing (CE-OFDM) is adopted as a modulation technique to allow an efficient power amplification, fundamental for mmWave based systems. Furthermore, a hybrid architecture is considered at the user terminals (UTs) and base station (BS) to reduce the high cost and power consumption required by a full-digital architecture, which has a radio frequency (RF) chain per antenna. Both the design of the UT’s precoder and base station equalizer are considered in this work. With the aim of maximizing the beamforming gain between each UT and the BS, the precoder analog coefficients are computed as a function of the average angles of departure (AoD), which are assumed to be known at the UTs. At the BS, the analog part is derived by assuming a system with no multi-user interference. Then, a per carrier basis nonlinear/iterative multi-user equalizer, based on the iterative block decision feedback equalization (IB-DFE) principle is designed, to explicitly remove both the multi-user and residual inter carrier interferences, not tackled in the analog part. The equalizer design metric is the sum of the mean square error (MSE) of all subcarriers, whose minimization is shown to be equivalent to the minimization of a weighted error between the hybrid and the full digital equalizer matrices. The results show that the proposed hybrid multi-user equalizer has a performance close to the fully digital counterpart.

show abstract

Antenna Deembedding for mmWave Propagation Modeling and Field Measurement Validation at 73 GHz

Cited by 13 publications

References 15 publications

Outdoor-to-Indoor Channel Measurement and Coverage Analysis for 5G Typical Spectrums

Outdoor-to-Indoor Channel Measurement and Coverage Analysis for 5G Typical Spectrums

On Angular Sampling Intervals for Reconstructing Wideband Channel Spatial Profiles in Directional Scanning Measurements

Multiuser Equalizer for Hybrid Massive MIMO mmWave CE-OFDM Systems

Contact Info

Product

Resources

About