This paper investigates the optimal transmit beamforming designs for simultaneous wireless information and power transfer (SWIPT) in multiple-input single-output interference channels (IFC). Based on cooperation level among transmitters receivsers, we classify SWIPT IFC systems into two categories. First, consider with partial cooperation, where only channel state (CSI) is available at receivers, but not signal waveform. Second, examine both CSI waveforms are known to receivers. Then,...

This paper investigates multiuser multiple-input-multiple-output (MIMO) wireless powered communication networks where a multiantenna hybrid access point (H-AP) transfers energy to users in downlink phase, and the utilize harvested for their information transmission H-AP an uplink phase. By employing space-division multiple-access techniques, we propose optimal algorithm that jointly computes precoding matrices, time allocation between phases maximizing sum-rate performance. To this end,...

Designing RNAs that form specific secondary structures is enabling better understanding and control of living systems through RNA-guided silencing, genome editing protein organization. Little known, however, about which RNA might be tractable for downstream sequence design, increasing the time expense design efforts due to inefficient structure choices. Here, we present insights into structural features increase difficulty finding sequences fold a target structure, summarizing tens thousands...

In this paper, we investigate wireless powered communication network for OFDM systems, where a hybrid access point (H-AP) broadcasts energy signals to users in the downlink, and transmit information H-AP uplink based on orthogonal frequency division multiple access. We consider full-duplex which simultaneously transmits receives signals. scenario, address joint subcarrier scheduling power allocation problem maximize sum-rate under two cases: perfect self-interference cancellation (SIC) fully...

In this paper, we study a vertical beamforming technique for multiple-input multiple-output downlink multi-user systems. general, the transmit antenna gain is controlled by adjusting boresight of antennas in directional antennas, and thus cell average rate varies according to angle boresight. First, compute tilting angles systems which maximize rate. To end, probability density function three-dimensional user distribution derived. Based on result, analyze active over passive single case....

This letter investigates hybrid networks composed of a radio frequency (RF) access point (AP) and multiple visible light communication (VLC) APs. We consider mobile multi-homing users that can aggregate resources from both RF VLC In RF/VLC networks, channel gains vary faster than channels due to small scale fading. By leveraging multi-agent Q-learning interact with the dynamics wireless environments, we develop an online two-timescale power allocation strategy optimizes transmit powers at...

This letter investigates covert communication in an intelligent reflecting surface (IRS)-assisted system. We propose a novel algorithm that jointly optimizes the transmission probability, transmit power at transmitter, and reflection matrix of IRS with goal maximizing achievable rate receiver while ensuring covertness transmission. first analyze expected detection error probability warden, then develop technique for maximization using only one-dimensional search methods. The proposed...

In this paper, we investigate the outage and ergodic capacity of downlink distributed antenna systems (DAS) where each unit (DAU) has multiple antennas with per-DAU power constraint. We first derive optimal beamforming vector in a closed form by applying matrix minor condition to relax positive semi-definite observe that our derived solution maximum ratio transmission per DAU full power. Based on beamforming, under Rayleigh fading channels are analyzed. To end, show distribution received...

In this paper, we study a transmit beamforming technique for multiple input single output downlink single-user systems with three dimensional antennas where antenna gain is determined in coordinates. general, the controlled by adjusting boresight of directional antennas. To derive optimal tilting angles systems, provide probability density functions (PDF) user distribution. Furthermore, based on PDF, analysis average rates passive and active presented. Simulation results verify accuracy...

The Poisson point process (PPP) has been widely employed to model wireless networks and analyze their performance. PPP the property that nodes are conditionally independent from each other. As such, it may not be a suitable for many networks, where there exists repulsion among nodes. In order address this limitation, we adopt hardcore (PHCP), in which no two can closer than radius one another. We consider two-tier heterogeneous spatial distributions of transmitters first-tier second-tier...

In this paper, we analyze the average sum rate of downlink multi-antenna systems with zero-forcing beamforming (ZFBF). practical implementations, each antenna is equipped its own power amplifier and limited individually by linearity amplifier. Thus, paper adopts a more realistic per-antenna constraint instead conventional sum-power on transmit antennas. To end, first show that distribution received signal-to-noise ratio (SNR) ZFBF scheme equal-rate metric can be approximated as minimum...

Ambient radio frequency (RF) energy harvesting methods have drawn significant interests due to their ability provide wireless devices from ambient RF sources. This paper considers sensor networks where a node transmits data sink using the harvested signals transmitted by We analyze performance of network, i.e., mean energy, power outage probability, and transmission probability. In many practical networks, locations sources are spatially correlated exhibit repulsive behaviors. Therefore, we...

This paper focuses on the development of energy efficient hybrid networks consisting radio frequency (RF) base stations (BSs) and visible light communication (VLC) BSs. More specifically, since quality-of-service cost are key parameters in designing networks, this optimizes RF BS VLC intensities to minimize area power consumption (APC) under an outage probability constraint. Using stochastic geometry, approximations which applicable arbitrary field-of-view at photodiodes present low...

Link instability induced by users' mobility is one of the challenges optical wireless communications (OWC) inherited from propagation nature light. Hence, good understanding channel characteristics in dynamic environments plays a vital role developing robust resource management strategies OWC networks. Unfortunately, it quite difficult to collect accurate indoor data environments. In addition, trajectory dataset not publicly available. To overcome such limitations, this paper proposes mobile...

In this paper, we propose new beamforming techniques based on virtual signal-to-interference-plus-noise ratio (VSINR) for weighted sum-rate (WSR) maximization in coordinated multi-cell transmission. earlier works the VSINR maximization, parameters which control interference power and noise variance were set to fixed values regardless of channel realizations signal-to-noise level. order obtain an improved WSR performance, a method adaptively adjusts after establishing connection between...

We study joint processing (JP) for network MIMO systems where base stations exchange the user's message and channel state information under per-BS power constraint. In this letter, we propose a weighted sum mean square error (WS-MSE) minimization algorithm JP by considering gain as weight factor in MSE metric. To efficiently solve formulated WS-MSE problem, an alternating optimization method which iteratively finds local optimal solution is employed our algorithm. The simulation results...

Mutations in the transcription factors PAX9 and MSX1 cause selective tooth agenesis humans. In bud mesenchyme of mice, both proteins are required for expression Bmp4, which is key signaling factor progression to next step development. We have previously shown that Pax9 can transactivate a 2.4-kb Bmp4 promoter construct, most tooth-agenesis-causing mutations impair DNA binding activation. also found Msx1 by itself represses from this proximal promoter, that, combination with Pax9, it acts as...

In this paper, we propose a new beamforming technique that maximizes the end-to-end signal-to-noise ratio (SNR) for amplify-and-forward multiple-input-multiple-output cooperative relaying systems with direct link between thesource and destination. Instead of conventional schemes resorting to an iterative method, such as gradient ascentalgorithm, our scheme provides simple closed-form solution source-relay joint beamformer designs. To end, wefirst derive expression SNR its lower bound, which...

In this paper, we analyze the performance of wireless sensor networks using stochastic geometry. practical networks, since nodes in are not independently placed, there exists a correlation among locations nodes. order to capture effect correlation, model spatial distribution as α-Ginibre point processes (GPPs), which reflect repulsion. It is assumed that each node associated with closest gateway and employs fractional channel inversion power control, adjusts transmit based on contact...

Autonomous teams of unmanned ground and air vehicles rely on networking distributed processing to collaborate as they jointly localize, explore, map, learn in sometimes difficult adverse conditions. Co-designed intelligent wireless networks are needed for these autonomous mobile agents applications including disaster response, logistics transportation, supplementing cellular networks, agricultural environmental monitoring. In this paper we describe recent progress systems using a low...

In this paper, we consider fog radio access networks (F-RANs) consisting of cache-enabled device-to-device (D2D) transmitters and points (F-APs), which deliver data by exploiting cached contents or leveraging cloud processing. We three types modes at a typical user, namely, D2D, F-AP, cooperative modes. the D2D F-AP modes, when user requests content, receives content from transmitter an caching respectively. mode, F-APs located near send aided centralized processing unit. also examine mode...

In this letter, we study multiple-input single-output joint processing (JP) systems with limited feedback where base stations exchange both channel state information and their data via ideal backhaul links. order to optimize the sum-rate performance of JP system, propose a new bit allocation scheme which maximizes quantization accuracy in presence pathloss. The is formulated by expectation inner product between actual vector quantized vector. First, derive as closed form, compensates phase...

In this article, we investigate the problem of distributed coherent beamforming in wireless networks where multiple transmitters adjust phases their signals to form a directional and targeted communication link client receiver. The quality-of-service (QoS) security are key components robust secure networks. Although can be improved by exploiting information about potential adversaries, such may not available practical since adversaries often passive. Therefore, introduce transmission...

In this paper, we consider weighted sum-rate (WSR) maximization problems in multiple-input single-output (MISO) interference channels (IFC) and interfering broadcast (IFBC). Most of existing techniques have tried to improve the WSR performance by utilizing instantaneous channel state information. However, since these methods general should be carried out for each realization, they require high computational complexity, which may not suitable practical systems. To overcome issue, propose a...

In this paper, we provide minimum mean-squared error-based source-relay-destination transceiver designs for multiple-input multiple-output amplify-and-forward relaying systems, where direct link between the source and destination is non-negligible. an earlier work, a local optimal technique was introduced which employs projected gradient method interior point method. Since these methods may have quite high computational complexity, investigate new solution has low complexity. To end, first...