On the Application of K-User MIMO for 6G Enhanced Mobile Broadband

Yerrapragada, Anil Kumar; Kelley, Brian

doi:10.3390/s20216252

Cited by 11 publications

(6 citation statements)

References 29 publications

(42 reference statements)

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“…Hybrid beamforming can be categorized depends on average or instantaneous CSI where instantaneous CSI provides better SNIR and average CSI gives lower overhead in CSI acquisition. Therefore, algorithm selection to get best trade-off essentially depends on channel characteristics [113]. CSI availability at Rx (CSIR) is collected using pilot signals and CSI at Tx (CSIT) is collected using feedback channels from Rx to Tx.…”

Section: Mu-mmimo Hybrid Beamformingmentioning

confidence: 99%

Design and Feasibility Verification of 6G Wireless Communication Systems with State of the Art Technologies

Dilli

2021

Int J Wireless Inf Networks

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Frequencies above 100 GHz are the promising frequency bands for 6G wireless communication systems because of the abundant unexplored and unused spectrum. The increasing global demand for ultra-high spectral efficiencies, data rates, speeds and bandwidths in next-generation wireless networks motivates the exploration of peak capabilities of massive MIMO (Multi–Input–Multi–Output) wireless access technology at THz bands (0.1–10 THz). The smaller wavelengths (order of microns) of these frequencies give an advantage of making high gain antennas with smaller physical dimensions and allows massive spatial multiplexing. This paper presents the design of ultra-massive MIMO (ultra-mMIMO) hybrid beamforming system for multi users and its feasibility to function at THz frequency bands. The functionality of the proposed system is verified at higher order modulation schemes to achieve higher spectral efficiencies using performance metrics that includes error vector magnitude, symbol constellations, and antenna array radiation beams. The performance results suggest to use a particular mMIMO antenna configuration based on number of independent data streams per user and strongly recommended to use higher number of data streams per user in order to achieve higher throughputs that satisfy the needs of 6G wireless systems. Also the performance of the proposed system at 0.14 THz is compared with mmWave systems that operate at 28 GHz and 73 GHz bands to justify the feasibility of the proposed work.

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Section: Mu-mmimo Hybrid Beamformingmentioning

confidence: 99%

Design and Feasibility Verification of 6G Wireless Communication Systems with State of the Art Technologies

Dilli

2021

Int J Wireless Inf Networks

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“…While beamforming techniques (analog, digital, or hybrid [19] may be more attractive for BSs, due to the need for many transmit antennas, STBC; on the other hand, can be used in the bath downlink and uplink connections. The combination of modulation system and MIMO is a major trend in mobile communication systems [20], [21], [22], [23], and [24], such as 5G and the next generations, which are based on the socalled MIMOOFDM and mMIMO-OFDM [25] approaches. Nevertheless, digital communication systems over wireless channels can experience severe signal degradations due to multipath propagation, additive white Gaussian noise (AWGN) [26] and [ 27], and Doppler effects [28].…”

Section: Introductionmentioning

confidence: 99%

The Contribution of Artificial Intelligence in Blind Equalization Using SOSA-MIMO Algorithm with QOSTBC Coding

Abderrazak,

Abdessalam

2023

Preprint

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The recent evolution in communications forces us to rely on AI to improve the quality of communications. Artificial intelligence has become one of the necessities in the development of scientific life. In this article, we integrate artificial intelligence into blind equalization using the coding technique QOSTBC with Multi-input Multi-output (MIMO) transmission. The Multi-input Multi-output (MIMO) transmission and the blind equalizer schemes by using the QOSTBC coding have become the techniques of choice for increasing spectral efficiency in bandwidth-congested areas are hit in demand nowadays, especially in mobile applications, where devices with size, weight, and power constraints are common. In this paper, we propose a new blind equalizer using the second-order statistical algorithm in a MIMO system with QOSTBC coding used. QOSTBCs with MIMO-SOSA are used to enhance the energy efficiency of the communication system with 8; 4 and 2 antennas. We obtain the optimal performance that ensures full diversity and maximizes the QOSTBC minimum coding gain distance. Simulation results are presented for MIMO-SOSA under 5g wireless Rayleigh channels so that a fair performance comparison with other reference techniques can be established. The results show that by using MIMO-SOSA along with a coding QOSTBC and with diversity in the fading channel and thus low BER at high SNR can be ensured. More importantly, it is also shown that QOSTBC using MIMO-SOSA achieves a better error performance than those using conventional modulation format.

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“…Several interference management techniques against the CLI have been recently studied within the context of exploiting interference alignment (IA) and a degrees-of-freedom (DoF) optimal approach [ 15 ]. Interference is a traditional major impairment factor for the QoS, such as data rate and reliability in multi-user cellular networks, and IA is a prominently investigated technique for interference management [ 15 , 16 , 17 , 18 , 19 , 20 ]. Briefly, the basic idea of IA is to project (align) unintended signals (interference) into a signal subspace orthogonal to the desired signal direction through cooperative pre- and post-coding at the transmitter and receiver, respectively.…”

Section: Introductionmentioning

confidence: 99%

A QoS-Adaptive Interference Alignment Technique for In-Band Full-Duplex Multi-Antenna Cellular Networks

Lee

Park

Jung

2022

Sensors

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In this paper, we propose a novel interference alignment (IA) technique for an in-band full-duplex (IBFD) multiple-input multiple-output (MIMO) cellular network where a base station (BS) and user equipment (UE) are equipped with multiple antennas, and the local channel state information (CSI) is available at all nodes. Considering a practical IBFD MIMO cellular network, it is assumed that only the BS operates with full-duplex (FD) communication while UE operate in half-duplex (HD) mode. These IBFD networks introduce a new type of interference called cross-link interference (CLI), in which uplink UE affects downlink UE. The proposed IA technique consists of two symmetric IA schemes according to the number of antennas in the uplink and downlink UE, and both schemes effectively mitigate CLI in the IBFD MIMO network. It is worth noting that both IA schemes are adaptively applicable according to the network’s quality-of-service (QoS) requirements, such as uplink and downlink traffic demands. Furthermore, we theoretically characterize and prove the achievable sum-degrees-of-freedom (DoF) of the proposed IA technique. Simulation results show that the proposed IA technique significantly improves the sum rate performance compared to conventional HD communications (multi-user MIMO) while achieving the same achievable DoF as the interference-free IBFD MIMO network.

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On the Application of K-User MIMO for 6G Enhanced Mobile Broadband

Cited by 11 publications

References 29 publications

Design and Feasibility Verification of 6G Wireless Communication Systems with State of the Art Technologies

Design and Feasibility Verification of 6G Wireless Communication Systems with State of the Art Technologies

The Contribution of Artificial Intelligence in Blind Equalization Using SOSA-MIMO Algorithm with QOSTBC Coding

A QoS-Adaptive Interference Alignment Technique for In-Band Full-Duplex Multi-Antenna Cellular Networks

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