Analysis of Spatial Overlap Constellations in Hybrid Beamforming Communication Systems

2018 ◽  
Author(s):  
Joerg Eisenbeis ◽  
Pablo Ramos Lopez ◽  
Tobias Mahler ◽  
Thomas Zwick
Keyword(s):  
Communication Systems ◽  
Spatial Overlap ◽  
Hybrid Beamforming

scholarly journals Advanced Hybrid Beamforming Technique in MU-MIMO Systems

2020 ◽  
Vol 10 (17) ◽  
pp. 5961
Author(s):  
Seong-Joon Shim ◽  
Seulgi Lee ◽  
Won-Seok Lee ◽  
Jae-Hyun Ro ◽  
Jung-In Baik ◽  
...  
Keyword(s):  
Communication Technology ◽  
Communication Systems ◽  
High Performance ◽  
Mimo Systems ◽  
Error Performance ◽  
Fifth Generation ◽  
New Radio ◽  
Sum Rate ◽  
Hybrid Beamforming ◽  
Beam Patterns

This paper proposes a high performance wireless commmunication technology in MU-MIMO systems. The millimeter wave (mmWave) communication technology was considered for the future wireless communication systems such as the fifth-generation new radio (5G NR). In 5G NR, the mmWave communication technology was studied to increase the use of wide bandwidth and the data rate. Therefore, MU-MIMO systems can be used in mmWave. To decrease the complexity of conventional digital beamforming system, the hybrid beamforming system was studied. In particular, the proposed hybrid beamforming system improves the error performance and average sum rate in partially connected structure (PCS) hybrid beamforming system. The proposed PCS hybrid beamforming system forms variously combined beam patterns using the information of azimuth and elevation angles for the multi-paths according to the number of bits. In addition, the azimuth and elevation angles among the formed beam patterns are estimated according to the received signal strength (RSS). In the simulation results, the proposed PCS hybrid beamforming system has better error performance and the average sum rate than the conventional hybrid beamforming system.

scholarly journals 2D-OPC Subarray Structure for Efficient Hybrid Beamforming over Sparse mmWave Channels

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Junhyuk Yoo ◽  
Wonjin Sung ◽  
In-Kyung Kim
Keyword(s):  
Antenna Arrays ◽  
Communication Systems ◽  
Dimensional Space ◽  
Path Loss ◽  
Two Dimensional ◽  
Hardware Cost ◽  
Antenna Structure ◽  
Digital Beamforming ◽  
Trade Offs ◽  
Hybrid Beamforming

Millimeter-wave (mmWave) communication is a key technology of 5G new radio (NR) mobile communication systems. Efficient beamforming using a large antenna array is important to cope with the significant path loss experienced in the mmWave spectrum. The existing fully digital beamforming scheme requires a separate radio frequency (RF) chain for each antenna, which results in an excessive hardware cost and consumption power. Under these circumstances, hybrid beamforming which approaches the performance of fully digital beamforming while reducing the complexity is a promising solution for the mmWave multiuser transmission. By extending the existing hybrid beamforming strategies, this paper proposes a novel architecture which effectively reduces the hardware cost and complexity for large antenna arrays. The proposed scheme includes multiple subarrays in the form of uniform planar array (UPA) which are allowed to be overlapped in the two-dimensional space. The corresponding antenna structure is referred to as the two-dimensional overlapped partially connected (2D-OPC) subarray structure. We evaluate the performance of the proposed scheme to suggest performance-complexity trade-offs in designing versatile antenna arrays for efficient beamforming over the mmWave channel.

scholarly journals Low-Complexity and Robust Hybrid Beamforming Design for Multi-Antenna Communication Systems

2018 ◽  
Vol 17 (3) ◽  
pp. 1445-1459 ◽  
Author(s):  
Mehdi M. Molu ◽  
Pei Xiao ◽  
Mohsen Khalily ◽  
Kanapathippillai Cumanan ◽  
Lei Zhang ◽  
...  
Keyword(s):  
Communication Systems ◽  
Low Complexity ◽  
Hybrid Beamforming

scholarly journals Hybrid Beamforming Analysis Based on MIMO Channel Measurements at 28 GHz

2020 ◽  
Author(s):  
Joerg Eisenbeis ◽  
Magnus Tingulstad ◽  
Nicolai Kern ◽  
Zsolt Kollár ◽  
Jerzy Kowalewski ◽  
...  
Keyword(s):  
Communication Systems ◽  
Channel Model ◽  
Multiple Input Multiple Output ◽  
Wireless Channel ◽  
Mimo Channel ◽  
Channel Measurements ◽  
Electromagnetic Propagation ◽  
Channel Models ◽  
Input Multiple Output ◽  
Hybrid Beamforming

<div>Hybrid beamforming systems represent an efficient</div><div>architectural solution to realize massive multiple-input multiple-output (MIMO) communication systems in the centimeter wave (cmW) and millimeter wave (mmW) region. These hybrid beamforming systems separate the beamforming process into a digital and analog beamforming network. The analog beamforming networks can be realized by different architectural solutions, which demand dedicated algorithms to determine the complex weighting factors in the digital and analog domain. To date, novel hybrid beamforming architectures and algorithms are solely compared in numerical simulations based on statistical channel models. These abstract channel models simplify the complicated electromagnetic propagation process, thereby not exactly reconstructing the wireless channel. Within this work, we present a measurement-based evaluation of hybrid beamforming algorithms and compare them with numerical results gained from a statistical path-based MIMO channel model. The results show that by adjustment of the channel model parameter the simulation achieves a good match with the measured maximum achievable spectral efficiencies.</div>

scholarly journals A Hybrid Beamforming Design for Massive MIMO LEO Satellite Communications

2021 ◽  
Vol 2 ◽  
Author(s):  
Joan Palacios ◽  
Nuria González-Prelcic ◽  
Carlos Mosquera ◽  
Takayuki Shimizu ◽  
Chang-Heng Wang
Keyword(s):  
Communication Systems ◽  
Satellite Communication ◽  
Channel Model ◽  
Satellite Communications ◽  
Mobile Terminal ◽  
Low Earth Orbit ◽  
Special Focus ◽  
Codebook Design ◽  
Hybrid Beamforming ◽  
Leo Satellite

5G and future cellular networks intend to incorporate low earth orbit (LEO) satellite communication systems (SatCom) to solve the coverage and availability problems that cannot be addressed by satellite-based or ground-based infrastructure alone. This integration of terrestrial and non terrestrial networks poses many technical challenges which need to be identified and addressed. To this aim, we design and simulate the downlink of a LEO SatCom compatible with 5G NR, with a special focus on the design of the beamforming codebook at the satellite side. The performance of this approach is evaluated for the link between a LEO satellite and a mobile terminal in the Ku band, assuming a realistic channel model and commercial antenna array designs, both at the satellite and the terminal. Simulation results provide insights on open research challenges related to analog codebook design and hybrid beamforming strategies, requirements of the antenna terminals to provide a given SNR, or required beam reconfiguration capabilities among others.

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