Practical Demonstration of Limited Feedback Beamforming for mmWave Systems

Berraki, Djamal E.; Barratt, Thomas; Beach, M.A.; Armour, Simon; Nix, Andrew R

doi:10.1109/vtcspring.2015.7146023

Cited by 5 publications

(1 citation statement)

References 11 publications

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“…notable prototype [48] operates at 8GHz with two phased arrays synchronized by cabled reference clock. In addition to CFO, as emphasized in this work, the phase noise can also severely degrade coherency among channel observations.…”

Section: Discussion On Open Issuesmentioning

confidence: 99%

Compressive Initial Access and Beamforming Training for Millimeter-Wave Cellular Systems

Han

Čabrić

2019

IEEE J. Sel. Top. Signal Process.

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Initial access (IA) is a fundamental physical layer procedure in cellular systems where user equipment (UE) detects nearby base station (BS) as well as acquire synchronization. Due to the necessity of using antenna array in millimeter-wave (mmW) IA, the channel spatial information can also be inferred. The state-of-the-art directional IA (DIA) uses sector sounding beams with limited angular resolution, and thus requires additional dedicated radio resources, access latency and overhead for refined beam training. To remedy the problem of access latency and overhead in DIA, this work proposes to use a quasi-omni pseudorandom sounding beam for IA, and develops a novel algorithm for joint initial access and fine resolution initial beam training without requiring extra radio resources. We provide the analysis of the proposed algorithm miss detection rate under synchronization error, and further derive Cramér-Rao lower bound of angular estimation under frequency offset. Using QuaDRiGa simulator with mmMAGIC model at 28 GHz, the numerical results show that the proposed approach is advantageous to DIA with hierarchical beam training. The proposed algorithm offers up to two order of magnitude access latency saving compared to DIA, when the same discovery, post training SNR, and overhead performance are targeted. This conclusion holds true in various propagation environments and 3D locations of a mmW pico-cell with up to 140m radius.

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Section: Discussion On Open Issuesmentioning

confidence: 99%

Compressive Initial Access and Beamforming Training for Millimeter-Wave Cellular Systems

Han

Čabrić

2019

IEEE J. Sel. Top. Signal Process.

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Benefits of the sparsity of mmWave outdoor spatial channels for beamforming and interference cancellation

Berraki

Armour

Nix

2018

Physical Communication

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Codebook Designs for Millimeter-Wave Communication Systems in Both Low- and High-Mobility: Achievements and Challenges

Mabrouki

Dayoub

et al. 2022

IEEE Access

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More connectivity, higher data rates, more reliability, massive network capacity, higher performance and fewer delays are required in the fifth generation (5G) of cellular networks. The last ten years have contained explosive growth in mobile data traffic due to the rapid proliferation of Internetconnected smart devices. For 5G mobile and wireless networks, one of the challenges is to discover how to solve the dilemma between capacity requirements and spectrum shortage. Millimeter-wave communication is therefore a key enabler for 5G technologies. Due to the high path and penetration losses at millimeter wavelengths, antenna beamforming assumes a pivotal role in establishing and maintaining a robust communication link. Recently, codebook-based beamforming has been proposed to achieve a fair balance between complexity and performance and to eliminate the overheads. In this paper, we track the techniques of codebook-based beamforming for millimeter-wave communications in the context of the distinct requirements for low-mobility channel and high-mobility channel scenarios. Subsequently, we will provide a comparison of existing codebook-based beamforming techniques in terms of their respective benefits and shortcomings. Finally, some open directions of research are discussed, and challenges that need to be met are pointed out.

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Practical Demonstration of Limited Feedback Beamforming for mmWave Systems

Cited by 5 publications

References 11 publications

Compressive Initial Access and Beamforming Training for Millimeter-Wave Cellular Systems

Compressive Initial Access and Beamforming Training for Millimeter-Wave Cellular Systems

Benefits of the sparsity of mmWave outdoor spatial channels for beamforming and interference cancellation

Codebook Designs for Millimeter-Wave Communication Systems in Both Low- and High-Mobility: Achievements and Challenges

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