Experimental verification of massive antenna systems employing parallelogram planar arrays

Maruta, Kazuki; Arai, T.; Ohta, Akio; Kurosaki, Satoshi; Iwakuni, Tatsuhiko; Iwakuma, Masataka

doi:10.1002/tee.22568

Cited by 4 publications

(3 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The effects of antenna element types with uniform array geometries on the correlation and the capacity have been investigated in [10][11][12][13][14]. The uniform horizontal linear, the uniform vertical linear and the uniform planar antenna arrays consisting of 64 elements with half-wavelength separation are compared in [14], and it was shown that the horizontal linear array performs better than others in terms of channel separability.…”

Section: Introductionmentioning

confidence: 99%

“…In terms of array geometry, a parallelogram antenna array (PPA) was proposed to reduce the channel correlation in [12]. The performance of the PPA was evaluated using system-level simulations and experiments in [13] where it was concluded that the PPA mitigates the overall channel correlation compared to uniform arrays. However, this study did not consider the spaces occupied by the antenna arrays, hence, the PPA geometry causes a wider antenna array size because of its parallelogram shape.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

On the Impact of Antenna Array Geometry on Indoor Wideband Massive MIMO Networks

Temiz

Alsusa

Danoon

et al. 2021

IEEE Trans. Antennas Propagat.

View full text Add to dashboard Cite

Multi-user massive multiple-input-multiple-output (massive MIMO) will play a key role in future wireless communication networks. Since spatial channel diversity is the fundamental merit of this technique, high channel correlation may significantly restrict its abilities. This study investigates the impact of channel correlation on a prototyped massive MIMO network with the objective to identify an antenna array geometry which has reduced mutual coupling and channel correlation. To this end, a highly-efficient directional wideband single antenna element was designed for the antenna arrays and the user equipments (UEs). The designed array geometry is tested in an experimental indoor wideband massive MIMO setup. Important system parameters, such as channel correlation, power delay profile, and average received power from the UEs, are studied by analyzing the measured channel data. Furthermore, system-level simulations and network capacity calculations are performed based on the measured channel data to evaluate the performance of the prototyped antenna arrays. A regular array was also fabricated and used for benchmarking comparison. Moreover, a power control algorithm is introduced for the uplink, which was shown to improve the network capacity by up to 3 dB. The results demonstrate that the introduced antenna array outperforms the uniform antenna array in terms of mutual coupling and channel capacity. Massive MIMO, antenna array, mutual coupling, channel correlation, power control algorithm * This work was presented in part at 2019 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting [1].† This study has been accepted to be published at IEEE Transactions on Antennas and Propagation, this is a preprint and is not the final version of the study which will be published by the journal.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

On the Impact of Antenna Array Geometry on Indoor Wideband Massive MIMO Networks

Temiz

Alsusa

Danoon

et al. 2021

IEEE Trans. Antennas Propagat.

View full text Add to dashboard Cite

show abstract

“…RSs are uniformly distributed within the range of 45 • ≤ ϕ ≤ 135 • (horizontal) and 90 • ≤ θ ≤ 95 • (looking down). Thanks to the low spatial correlation nature provided by the PPA, the simplified threshold based RS scheduling is applied[31,32]. Combination of RSs is determined such that their spatial correlation is lower than the threshold of 0.3.…”

mentioning

confidence: 99%

Frequency Domain Backoff for Continuous Beamforming Space Division Multiple Access on Massive MIMO Wireless Backhaul Systems

Maruta

2020

J. commun. softw. syst. (Online)

Self Cite

View full text Add to dashboard Cite

This paper newly proposes a frequency domain backoff scheme dedicated to continuous beamforming space division multiple access (CB-SDMA) on massive antenna systems for wireless entrance (MAS-WE). The entrance base station (EBS) has individual base band signal processing units for respective relay stations (RSs) to be accommodated. EBS then continuously applies beamforming weight to transmission/reception signals. CB-SDMA yields virtual point-to-point backhaul link where radio resource control messages and complicated multiuser scheduling are not required. This simplified structure allows RSs to work in a distributed manner. However, one issue remains to be resolved; overloaded multiple access resulting in collision due to its random access nature. The frequency domain backoff mechanism is introduced instead of the time domain one. It can flexibly avoid co-channel interference caused by excessive spatial multiplexing. Computer simulation verifies its superiority in terms of system throughput and packet delay.

show abstract

Reducing channel spatial correlation by rotating planar antenna array

et al. 2019

View full text Add to dashboard Cite

Experimental verification of massive antenna systems employing parallelogram planar arrays

Cited by 4 publications

References 22 publications

On the Impact of Antenna Array Geometry on Indoor Wideband Massive MIMO Networks

On the Impact of Antenna Array Geometry on Indoor Wideband Massive MIMO Networks

Frequency Domain Backoff for Continuous Beamforming Space Division Multiple Access on Massive MIMO Wireless Backhaul Systems

Reducing channel spatial correlation by rotating planar antenna array

Contact Info

Product

Resources

About