Performance Evaluation of 44GHz Band Massive MIMO Based on Channel Measurement

Taira, Akinori; Iura, Hiroki; Nakagawa, Kenji; Uchida, Shigeru; Kazuaki, Ishioka; Okazaki, Atsushi; Suyama, Satoshi; Tatsunori, Obara; Okumura, Yukihiko; Okamura, Atsushi

doi:10.1109/glocomw.2015.7414009

Cited by 18 publications

(7 citation statements)

References 15 publications

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“…New antenna techniques like multiple-input multiple-output (MIMO), massive MIMO [5] [6], active phased array antenna (APAA), massive APAA [7], and beamforming [8] are the basis of the emerging 5G systems. In this case, knowledge of AOA statistic properties plays a significant role in the construction of antenna arrays and radio resource management in the 5G systems [9].…”

Section: Introductionmentioning

confidence: 99%

Comparison of angular spread for 6 and 60 GHz based on 3GPP standard

Kelner

Ziółkowski

Uljasz

2018

2018 22nd International Microwave and Radar Conference (MIKON)

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In an urban environment, a multipath propagation is one of the basic phenomena affecting a quality of received signals. This causes dispersions in time and angular domains. Basic parameters describing these dispersions are the rms delay spread and rms angle spread, respectively. The delay spread is related to a frequency of the transmitted signal and the nature of the propagation environment. In this paper, we show a mutual relationship between the time and angular dispersions in the received signal. The obtained simulation results present a comparison of the described dispersions for two different frequencies. In this case, the multi-elliptical propagation model and standard model developed by 3GPP are the basis for the simulation analysis of new communication system solutions.

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Section: Introductionmentioning

confidence: 99%

Comparison of angular spread for 6 and 60 GHz based on 3GPP standard

Kelner

Ziółkowski

Uljasz

2018

2018 22nd International Microwave and Radar Conference (MIKON)

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“…Targeting the analog-digital hybrid configuration with multiple subarrays as massive MIMO [21,22], an antenna corresponding to a TX port at BS was assumed to be a planar APAA, so the TX array was composed of 16 APAA subarrays arranged in a plane, where we exactly had 2 Â 4 ¼ 8 pairs of ideally-isolated cross-polarized (45 -slanted V/H) subarrays as shown in Fig. 8.…”

Section: Antenna Configurationmentioning

confidence: 99%

Performance Evaluation of NL-BMD Precoding over Analog-Digital Hybrid Beamforming for High SHF Wide-Band Massive MIMO in 5G

Nishimoto

Taira

Iura

et al. 2017

Int J Wireless Inf Networks

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Massive multiple-input multiple-output (MIMO) technology is a key enabler in 5G. A configuration combining analog beamforming and digital MIMO signal processing for multi-beam multiplexing, i.e. analog-digital hybrid beamforming, is one of the promising approaches of massive MIMO. With the configuration, we can mitigate the problems of complexity and power consumption, which are serious in higher super high frequency and extremely high frequency bands. In this paper, we evaluate the performance of nonlinear block multi-diagonalization (NL-BMD) precoding, an intermediate solution between the conventional linear precoder (LP) and nonlinear precoder (NLP), over an analog-digital hybrid beamforming constitution. Through numerical evaluation assuming indoor hotspot scenarios, it is clarified that, NL-BMD yields up to 18.8% improvement and 5.1 dB gain in average sum-rate spectral efficiency performance, compared with block diagonalization (BD), which is one of the typical schemes of conventional LP, while reducing the complexity to 1/2 of the conventional NLP. In addition, even under a dynamic fading condition, NL-BMD shows tolerance for channel transitions and still better performance than BD: NL-BMD suppresses performance loss in sum-rate spectral efficiency due to channel transitions to 18.3%, whereas BD shows over 20% loss.

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“…The numbers of TX&RX baseband ports and users were set to N tx = 16, N rx = 32, and N usr = 8, respectively, where the number of RX ports per user was fixed to N rx,i = 4 irrespective of users. Targeting the analog-digital hybrid configuration with multiple subarrays as massive MIMO [7], [29], an antenna corresponding to a TX port at BS was assumed to be a planar active phased array antenna (APAA), so the TX array was composed of 16 APAA subarrays arranged in a plane, where we exactly had 2×4 = 8 pairs of ideally-isolated cross-polarized (45 • -slanted V/H) subarrays as shown in Figs. 4 and 5.…”

Section: Scenario Setupmentioning

confidence: 99%

NL-BMD: Nonlinear Block Multi-Diagonalization Precoding for High SHF Wide-Band Massive MIMO in 5G

Nishimoto

Taira

Iura

et al. 2017

IEICE Trans. Commun.

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Massive multiple-input multiple-output (MIMO) technology is one of the key enablers in the fifth generation mobile communications (5G), in order to accommodate growing traffic demands and to utilize higher super high frequency (SHF) and extremely high frequency (EHF) bands. In the paper, we propose a novel transmit precoding named "nonlinear block multi-diagonalization (NL-BMD) precoding" for multiuser MIMO (MU-MIMO) downlink toward 5G. Our NL-BMD precoding strategy is composed of two essential techniques: block multi-diagonalization (BMD) and adjacent inter-user interference pre-cancellation (IUI-PC). First, as an extension of the conventional block diagonalization (BD) method, the linear BMD precoder for the desired user is computed to incorporate a predetermined number of interfering users, in order to ensure extra degrees of freedom at the transmit array even after null steering. Additionally, adjacent IUI-PC, as a nonlinear operation, is introduced to manage the residual interference partially allowed in BMD computation, with effectively-reduced numerical complexity. It is revealed through computer simulations that the proposed NL-BMD precoding yields up to 67% performance improvement in average sum-rate spectral efficiency and enables large-capacity transmission regardless of the user distribution, compared with the conventional BD precoding.

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Performance Evaluation of 44GHz Band Massive MIMO Based on Channel Measurement

Cited by 18 publications

References 15 publications

Comparison of angular spread for 6 and 60 GHz based on 3GPP standard

Comparison of angular spread for 6 and 60 GHz based on 3GPP standard

Performance Evaluation of NL-BMD Precoding over Analog-Digital Hybrid Beamforming for High SHF Wide-Band Massive MIMO in 5G

NL-BMD: Nonlinear Block Multi-Diagonalization Precoding for High SHF Wide-Band Massive MIMO in 5G

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