Joint Mobility-Aware UAV Placement and Routing in Multi-Hop UAV Relaying Systems

Gholami, Anousheh; Torkzaban, Nariman; Baras, John S.; Papagianni, Chrysa

doi:10.1007/978-3-030-67369-7_5

Cited by 6 publications

(3 citation statements)

References 30 publications

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“…In order to solve the above optimization problem, we rewrite the integral in (10) as the equivalent infinite series as follows,…”

Section: Composite Codebook Design Problemmentioning

confidence: 99%

“…Each entry of the codebook is a beamforming vector that generates a composite beam defined as a beam which covers a union of disjoint ACIs out of a set of all desired ACIs. Such composite codebook can be used in variety of applications in next-generation mmWave communications such as user tracking [6], target monitoring [7], 5G positioning, twoway communications [8], design of reconfigurable intelligent surfaces [9], UAV-enabled networks [10], etc. The composite codebook design problem may be also viewed as generalized version of the codebook design problem [11] [2] where the angular range under study is divided into equal-length ACIs and each codeword is supposed to cover only a single ACI.…”

Section: Introductionmentioning

confidence: 99%

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Codebook Design for Composite Beamforming in Next-generation mmWave Systems

Torkzaban¹,

Mohamamd²,

Khojastepour³

et al. 2022

Preprint

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In pursuance of the unused spectrum in higher frequencies, millimeter wave (mmWave) bands have a pivotal role. However, the high path-loss and poor scattering associated with mmWave communications highlight the necessity of employing effective beamforming techniques. In order to efficiently search for the beam to serve a user and to jointly serve multiple users it is often required to use a composite beam which consists of multiple disjoint lobes. A composite beam covers multiple desired angular coverage intervals (ACIs) and ideally has maximum and uniform gain (smoothness) within each desired ACI, negligible gain (leakage) outside the desired ACIs, and sharp edges. We propose an algorithm for designing such ideal composite codebook by providing an analytical closed-form solution with low computational complexity. There is a fundamental trade-off between the gain, leakage and smoothness of the beams. Our design allows to achieve different values in such trade-off based on changing the design parameters. We highlight the shortcomings of the uniform linear arrays (ULAs) in building arbitrary composite beams. Consequently, we use a recently introduced twin-ULA (TULA) antenna structure to effectively resolve these inefficiencies. Numerical results are used to validate the theoretical findings.

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“…In order to solve the above optimization problem, we rewrite the integral in (10) as the equivalent infinite series as follows,…”

Section: Composite Codebook Design Problemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Codebook Design for Composite Beamforming in Next-generation mmWave Systems

Torkzaban¹,

Mohamamd²,

Khojastepour³

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…The AoI has been applied to different network models as a performance metric for various communication systems that timeliness of data is critical , e.g., trust-aware resource allocation schemes [6,7], source nodes powered by energy harvesting [8][9][10][11][12], wireless erasure networks and coding [13][14][15][16][17], scheduling in networks [18][19][20][21][22], and unmanned aerial vehicle 1 (UAV)-assisted communication systems [23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%