Massive MIMO Assisted Aerial-Terrestrial Network: How Many UAVs Need to Be Deployed?

Ullah, Arif; Choi, Wooyeol

doi:10.36227/techrxiv.19397558.v1

Cited by 3 publications

(3 citation statements)

References 26 publications

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“…The reason is that this work focuses on Highrise Urban scenarios, consisting of many ground obstructions. Therefore, traditional air-to-ground channels (e.g., Nakagami fading channels [36,37]) may not be suitable for our considered scenarios. This assumption has been widely used for vehicular communications [38,39].…”

Section: Network Modelmentioning

confidence: 99%

Files Cooperative Caching Strategy Based on Physical Layer Security for Air-to-Ground Integrated IoV

Wang

Liu

et al. 2023

Drones

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Mobile edge cache (MEC)-enabled air-to-ground integrated Internet of Vehicles (IoV) technology can solve wireless network backhaul congestion and high latency, but security problems such as eavesdropping are often ignored when designing cache strategies. In this paper, we propose a joint design of cache strategy and physical layer transmission to improve the security offloading ratio of MEC-enabled air-to-ground IoV. By using the random geometry theory and Laplace transform, we derive the closed-form expression of the network security offloading ratio, which is defined as the probability that the request vehicle (RV) successfully finds the required file around it and obtains the file with a data rate larger than a given threshold. During the file acquisition process, we collectively consider the impact of the successful connection and secure transmission in the vehicle wireless communication. Then, we establish an optimization problem for maximizing the network security offloading ratio, in which the cache strategy and the secure transmission rate are jointly optimized. Furthermore, we propose an alternating optimization algorithm to solve the joint optimization problem. Simulation experiments verify the correctness of our theoretical derivation, and prove that the proposed cache strategy is superior to other existing cache strategies.

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Section: Network Modelmentioning

confidence: 99%

Files Cooperative Caching Strategy Based on Physical Layer Security for Air-to-Ground Integrated IoV

Wang

Liu

et al. 2023

Drones

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“…The mmWave communications generally operate at 30 GHz–300 GHz with a wavelength of 1 mm–10 mm, which leads to a relatively small physical size of the antennas. This enables the large-scale multiple input multiple output (MIMO) with hundreds of antennas that can meet the high throughput and coverage needs of future networks to be integrated in a limited space for practical applications [ 5 ], and also to compensate for the high path loss of mmWave channels for long-distance communications [ 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

Transceiver Optimization for mmWave Line-of-Sight MIMO Systems Using Hybrid Arrays

Deng

Zhang

et al. 2023

Micromachines

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The performance of millimeter wave (mmWave) line-of-sight multiple input multiple output (LOS MIMO) systems using hybrid arrays of planar subarrays was studied. We characterized the achievable maximum spatial multiplexing gain for such LOS MIMO systems by the measures of spectral efficiency and effective degree of freedom (EDoF). By proposing a joint plane-wave and spherical-wave-based general 3D channel model, we derived the optimal design parameters in the analog domain, i.e., the optimal subarray separation products, and analyzed their sensitivity on the system performance. We also gave analytical eigenvalue expressions of the equivalent LOS MIMO channel matrix, which are applicable to the case of a non-optimal design, as well as the upper and lower bounds of the EDoF for system performance evaluation. A piecewise uniform quantization codebook was further designed for quantizing phase shifter values in practical applications. The numerical and simulation results show that planar subarrays are superior to traditional arrays in terms of spectral efficiency and EDoF in Ricean fading channels because they are more robust to the change in the communication distance and the deviation from the optimal design. The use of hybrid arrays of planar subarrays effectively removes the limitation of mmWave LOS MIMO systems using traditional arrays, through which, the conventional Rayleigh distance criterion has to be satisfied to achieve the optimal performance.

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“…Multiple-input-multiple-output (MIMO) is one of the key technologies for meeting the constantly growing throughput requirement in modern wireless communication systems. In MIMO systems the transmitter and receiver are equipped with larger number of antennas to increase throughput and ensure higher spectral efficiency [1], [2]. However, these systems pose design challenges including low-complexity optimal signal detection at the receiver with higher number of antenna elements.…”

Section: Introductionmentioning

confidence: 99%

Soft-Output Deep-LAS Detection for Coded MIMO System: A Learning-Aided LLR Approximation

Ullah¹,

Choi²,

Sambo³

et al. 2022

Preprint

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Massive MIMO Assisted Aerial-Terrestrial Network: How Many UAVs Need to Be Deployed?

Cited by 3 publications

References 26 publications

Files Cooperative Caching Strategy Based on Physical Layer Security for Air-to-Ground Integrated IoV

Files Cooperative Caching Strategy Based on Physical Layer Security for Air-to-Ground Integrated IoV

Transceiver Optimization for mmWave Line-of-Sight MIMO Systems Using Hybrid Arrays

Soft-Output Deep-LAS Detection for Coded MIMO System: A Learning-Aided LLR Approximation

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