Distance-based attenuation is a critical aspect of wireless communications. As opposed to the ubiquitous powerlaw path loss model, this paper proposes stretched exponential model that suitable for short-range communication. In signal power attenuates over distance r as e <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-αr</sup> xmlns:xlink="http://www.w3.org/1999/xlink">β</sup> , where α and β are tunable parameters. Using experimental...

This paper studies the asymptotic properties of average area spectral efficiency (ASE) a downlink cellular network in limit very dense base station (BS) and user densities. analysis relies on three assumptions: 1) interference is treated as noise; 2) BS locations are drawn from Poisson point process; 3) path loss function bounded above satisfying mild regularity conditions. We consider possible definitions ASE, all which give units bits per second unit bandwidth area. When there no...

A beam codebook of 5G millimeter wave (mmWave) for data communication consists multiple high-peak-gain beams to compensate the high pathloss at mmWave bands. These also have point different angular directions, such that by performing searching over codebook, a good signal coverage full sphere around terminal (spherical coverage) can be achieved. model-based design assumes ideal omni-directional antenna pattern, and neglects impact housing antenna, does not work well because radiation pattern...

In-band full-duplex (FD) communications have been optimistically promoted to improve the spectrum utilization and efficiency. However, penetration of FD cellular networks domain is challenging due imposed uplink/downlink interference. This paper presents a tractable framework, based on stochastic geometry, study in networks. Particularly, we assess effect network performance quantify associated gains. proves vulnerability uplink downlink interference shows that rate gains harvested (up 97%)...

Joint phase-time arrays (JPTA) is a new mmWave radio frequency front-end architecture constructed with appending time-delay elements to phase shifters for analog beamforming. JPTA allows the base station (BS) form multiple frequency-dependent beams single RF chain, exploiting extra degrees of freedom offer. Without requiring power-hungry chains, BS can schedule users in different directions frequency-division multiplexing (FDM) manner. A achieves various advantages over traditional...

This paper contributes a comprehensive study on the effect of user hand grip design 5G millimeter-wave (mmWave) mobile handsets, specifically in terms antenna module placement and beamforming codebook. The high-frequency structure simulator (HFSS) is used to characterize radiation fields for different placements 14 possible handgrip profiles based experiments that we conducted. loss from blockage gains can be up 20-25 dB, which implies need taken into account while designing Specifically,...

Hybrid beamforming is an attractive solution to build cost-effective and energy-efficient transceivers for millimeter-wave terahertz systems. However, conventional hybrid techniques rely on analog components that generate a frequency flat response such as phase-shifters switches, which limits the flexibility of achievable beam patterns. As novel alternative, this paper proposes new class called Joint phase-time arrays (JPTA), additionally use true-time delay elements in create...

Summary In cases where the licensed radio spectrum is underutilized, cognitive technology enables devices to sense and then dynamically access this scarce resource making most out of it. work, we introduce a simple intuitive, yet powerful efficient, technique that allows opportunistic channel in systems completely distributed fashion. Our proposed method achieves very high values utilization throughput. It also minimizes interference between base stations primary users use spectrum. The...

In cellular systems, the user equipment (UE) can request a change in frequency band when its rate drops below threshold on current band. The UE is then instructed by base station (BS) to measure quality of candidate bands, which requires measurement gap data transmission, thus lowering rate. We propose an online-learning based switching approach that does not require any gap. Our proposed classifier-based policy instead exploits spatial and spectral correlation between radio signals...

We exploit tools from stochastic geometry to develop a tractable analytical approach for modeling uplink cellular networks. The developed model is load aware and accounts per-user power control as well the limited transmit constraint users' equipment (UEs). proposed paradigm based on simple scheme in which each user inverts his path-loss such that signal received at serving base station (BS) with certain threshold ρ Due of UEs, users cannot invert their BSs are allowed maximum power. show...

Backward compatibility is an essential ingredient for the success of new technologies.In context inband full-duplex (FD) communication, FD base stations (BSs) should support half-duplex (HD) users' equipment (UEs) without sacrificing foreseen gains.This paper presents flexible and tractable modeling framework multi-tier cellular networks with BSs FD/HD UEs.The presented model based on stochastic geometry accounts intrinsic vulnerability uplink transmissions.The results show that UEs are not...

Stochastic geometry (SG) has been widely accepted as a fundamental tool for modeling and analyzing cellular networks. However, the fading models used with SG analysis are mainly confined to simplistic Rayleigh fading, which is extended Nakagami-m in some special cases. neither nor accounts dominant specular components (DSCs) may appear realistic channels. In this paper, we present tractable model networks generalized two-ray (GTR) channel. The GTR explicitly two DSCs addition diffuse offers...

Full-Duplex (FD) transceivers may be expensive in terms of complexity, power consumption, and price to implemented all user terminals. Therefore, techniques exploit in-band full-duplex communication with FD base stations (BSs) half-duplex (HD) users' equipment (UEs) are required. In this context, 3-node topology (3NT) has been recently proposed for BSs reuse the uplink (UL) downlink (DL) channels HD terminals within same cell. paper, we present a tractable mathematical framework, based on...

We characterize the stability, metastability, and stationary regime of traffic dynamics in a single-cell uplink wireless system. The is represented terms spatial birth-death processes, which users arrive as Poisson point process time space, each with file to transmit base station. service rate user based on its signal interference plus noise ratio, where from other active cell. Once fully transmitted, leaves derive necessary sufficient condition for network independent specific bounded path...

In-band full-duplex (FD) communications have been optimistically promoted to improve the spectrum utilization in cellular networks. However, explicit impact of spatial interference, imposed by FD communications, on uplink and downlink transmissions has overlooked literature. This paper presents an extensive study effect performances. For sake rigorous analysis, we develop a tractable framework based stochastic geometry toolset. The developed model accounts for truncated channel inversion...

In-band full-duplex (FD) communications have been optimistically promoted to improve the spectrum utilization in cellular networks. However, explicit impact of spatial interference, imposed by FD communications, on uplink and downlink transmissions has overlooked literature. This paper presents an extensive study effect performances. For sake rigorous analysis, we develop a tractable framework based stochastic geometry toolset. The developed model accounts for truncated channel inversion...

In-band full-duplex (FD) communications have been optimistically promoted to improve the spectrum utilization and efficiency. However, penetration of FD cellular networks domain is challenging due imposed uplink/downlink interference. This paper presents a tractable framework, based on stochastic geometry, study in networks. Particularly, we assess effect network performance quantify associated gains. The proves vulnerability uplink downlink interference shows that improved rate gains...

Distance-based attenuation is a critical aspect of wireless communications. As opposed to the ubiquitous power-law path loss model, this paper proposes stretched exponential model that suitable for short-range communication. In signal power attenuates over distance r as e <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-αrβ</sup> , where α, β are tunable parameters. We integrate into downlink cellular network with base stations modeled by...

This paper studies the asymptotic properties of area spectral efficiency (ASE) a downlink cellular network in limit very dense base station (BS) and user densities. analysis relies on three assumptions: (1) interference is treated as noise; (2) BS locations are drawn from Poisson point process; (3) path loss function bounded above satisfying mild regularity conditions. When there no constraint minimum operational SINR instantaneous full channel state information available at transmitter, ASE...

We characterize the stability, metastability, and stationary regime of traffic dynamics in a single-cell uplink wireless system. The is represented terms spatial birth-death processes, which users arrive as Poisson point process time space, each with file to transmit base station. service rate user based on its signal interference plus noise ratio, where from other active cell. Once fully transmitted, leaves derive necessary sufficient condition for network independent specific path loss...

We study the scaling laws of signal-to-interference-plus-noise ratio (SINR) and area spectral efficiency ( ASE) in multi-antenna cellular networks, w here number antennas scales with base station (BS) spatial density λ, under assumption independent identically distributed (i.i.d.) channels. start MISO case N <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">t</sub> (λ) transmit a single receive antenna prove that average SINR as <sup...