An Overlapped Subarray Structure in Hybrid Millimeter-Wave Multi-User MIMO System

Wang, Zhiqiang; Zhu, Jinle; Wang, Jun; Yue, Guangrong

doi:10.1109/glocom.2018.8647446

Cited by 12 publications

(11 citation statements)

References 20 publications

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“…Focusing on the HBF architecture, different subarray structures can be realized depending on the interconnection among the RF chains, PSs and AEs (i.e., the RF-PS-AE mapping). The three structures that have been proposed in the literature are: (i) the fully-connected structure [7], [11], [14], (ii) the sub-connected structure [11], [13], [14] (also known as the partially-connected or array-of-subarrays [5]) and (iii) the overlapped subarray structure [12], [16]. The performance analyses of these HBF structures have been investigated for diverse scenarios.…”

Section: A Related Workmentioning

confidence: 99%

“…In addition, the fully-connected and the sub-connected array structures have received considerable attention in the literature [5], [8], [11]. However, the investigation of the overlapped array structure is rather very limited [12], [16]. More so, the analyses of the HBF structures are usually done in a disjoint manner.…”

Section: A Related Workmentioning

confidence: 99%

“…Thus, energy efficiency (EE) is a critical key performance indicator (KPI) for THz massive MIMO. The research community has thus been investigating different system architectures with a view to identifying the optimal model, not only in terms of the SE-EE performance but also with respect to the hardware requirement, cost and implementation complexity [5], [11], [12].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Generalized Hybrid Beamforming for Vehicular Connectivity Using THz Massive MIMO

Busari

Huq

Mumtaz

et al. 2019

IEEE Trans. Veh. Technol.

112

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Hybrid beamforming (HBF) array structure has been extensively demonstrated as the practically-feasible architecture for massive MIMO. From the perspectives of spectral efficiency (SE), energy efficiency (EE), cost and hardware complexity, HBF strikes a balanced performance tradeoff when compared to the fully-analog and the fully-digital implementations. Using the HBF architecture, it is possible to realize three different subarray structures, specifically the fully-connected, the sub-connected and the overlapped subarray structures. This paper presents a novel generalized framework for the design and performance analysis of the HBF architecture. A parameter, known as the subarray spacing, is introduced such that varying its value leads to the different subarray configurations and the consequent changes in system performance. Using a realistic power consumption model, we investigate the performance of the generalized HBF array structure in a cellular infrastructure-toeverything (C-I2X) application scenario (involving pedestrian and vehicular users) using the single-path terahertz (THz) channel model. Simulation results are provided for the comparative performance analysis of the different subarray structures. The results show that the overlapped subarray implementation maintains a balanced tradeoff in terms of SE, EE and hardware cost when compared to the popular fully-connected and the sub-connected structures. The overlapped subarray structure, therefore, offers promising potentials for the beyond-5G networks employing THz massive MIMO to deliver ultra-high data rates whilst maintaining a balance in the EE of the network.

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Section: A Related Workmentioning

confidence: 99%

Section: A Related Workmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Generalized Hybrid Beamforming for Vehicular Connectivity Using THz Massive MIMO

Busari

Huq

Mumtaz

et al. 2019

IEEE Trans. Veh. Technol.

112

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show abstract

“…In other words, beamforming (BF) is another technology that is critical for communication in the fifth generation. There are several methods to BF, including the mechanical process, phased array antennas [5] (analog BF, digital BF, and hybrid BF [6]), metamaterial antennas, reflector antennas, traveling wave antenna, and switched beam antenna [7].…”

Section: Introductionmentioning

confidence: 99%

“…[16]- [20]. The second technique uses an aperiodic array that is achieved by random subarray (RSA) [7], [11], and randomly overlap subarray (ROSA) [16]- [21].…”

Section: Introductionmentioning

confidence: 99%

Wide Scan Angle Randomly Overlap Subarray Antenna for 5G in 28GHz

Shadi

Atlasbaf

2021

Preprint

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Synthesizing antenna arrays for fifth-generation communication technology is the most significant issue in the electromagnetic industry and academia. This paper focused on a comprehensive algorithm to design an antenna array used as a 5G base station antenna. The proposed algorithm's goal has an array antenna with high gain, continuous wide scan angle without grating lobe, compact size, minimum cost, and simplicity of construction, particularly in the array feeding network's system. For this purpose, several factors, such as subarray topology, complex weighting function, the minimum number of RF elements, and the optimum number of microstrip layers will be intended. The desired topology is specified with the grating lobe's minimum level by comparing the array factor of different subarray combinations. We consider some limitations in our algorithm that improve the specification than before research and reduce the runtime algorithm. Moreover, the number of phase shifters is decreased to more than 53%, substantially improved than previous works. The GAPSO technique is then used to determine the excitation coefficients' optimal value to control SLL and beam scanning. Amplitude accuracy and phase are considered 0.1 and 1 degree, respectively, to avoid tolerance construction. The proposed method is also applied to design a linear array antenna using a 5G base station antenna in 28 GH. This aperiodic linear array's electromagnetic parameter consists of HPBW of 2.8◦, a gain of 20 dB, scanning up to ±50◦ in one direction, and SLL is below -15 dB.

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Hybrid Precoding for mmWave MIMO Systems With Overlapped Subarray Architecture

2022

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Traditional precoding is incompatible with millimetre wave (mmWave) multiple input multiple output (MIMO) systems due to hardware costs and power consumption. As a result, hybrid precoding is being considered as a promising technology for balancing hardware complexity and system performance. This paper proposes a hybrid precoding technique for overlapped subarrays (OSA) architecture in mmWave MIMO systems. It exploits the OSA's structure to decompose the hybrid precoding problem into a series of 𝐿 𝑡 𝑁 𝑠 /2 subproblems and then solves them iteratively, where 𝐿 𝑡 and 𝑁 𝑠 are the numbers of RF chains and transmitted data streams, respectively. First, the proposed scheme determines the analog and digital precoding submatrices of each OSA iteratively and then constructs the analog and digital precoding matrices of the whole OSA architecture. The digital precoding submatrix of each OSA is determined from each vector in the OSA submatrix. The results show that the proposed hybrid precoding for the OSA architecture outperforms the successive interference cancellation (SIC)-based hybrid precoding for non-overlapped SA (NOSA) and provides performance close to the fullyconnected (FC) spatially sparse hybrid precoding, despite requiring less hardware and computational complexities.

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An Overlapped Subarray Structure in Hybrid Millimeter-Wave Multi-User MIMO System

Cited by 12 publications

References 20 publications

Generalized Hybrid Beamforming for Vehicular Connectivity Using THz Massive MIMO

Generalized Hybrid Beamforming for Vehicular Connectivity Using THz Massive MIMO

Wide Scan Angle Randomly Overlap Subarray Antenna for 5G in 28GHz

Hybrid Precoding for mmWave MIMO Systems With Overlapped Subarray Architecture

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