Non-orthogonal multiple access (NOMA) has been recognized as a promising technique for providing high data rates in 5G systems. This letter is to study physical layer security single-input single-output (SISO) NOMA system consisting of transmitter, legitimate users and an eavesdropper. The aim this maximize the secrecy sum rate (SSR) subject users' quality service (QoS) requirements. We firstly identify feasible region transmit power satisfying all QoS Then we derive closed-form expression...

Non-orthogonal multiple access (NOMA) is considered as a promising technology for improving the spectral efficiency in fifth-generation systems. In this correspondence, we study benefit of NOMA enhancing energy (EE) multiuser downlink transmission, wherein EE defined ratio achievable sum rate users to total power consumption. Our goal maximize subject minimum required data each user, which leads nonconvex fractional programming problem. To solve it, first establish feasible range...

Backscatter wireless communication is an emerging technique widely used in low-cost and low-power systems, especially passive radio frequency identification (RFID) systems. Recently, the requirement of high data rates, reliability, security drives development RFID which motivates our investigation on physical layer a multiple-input multiple-output (MIMO) system. In this paper, we propose noise-injection precoding strategy to safeguard system with resource-constrained nature backscatter taken...

Non-orthogonal multiple access (NOMA) has been recognized as a potential technique to achieve higher spectral efficiency (SE) for future 5G systems. However, the anticipated thousand-fold increase in wireless data traffic urgently calls new designs of power-efficient communication In this paper, we investigate NOMA from perspective energy (EE) multiuser downlink system. Firstly, generalize an existing cognitive radio (CR) inspired scheme by introducing antenna techniques and extending number...

A manipulator is considered as a system of rigid bodies interconnected by joints that permit relative motions with certain degrees freedom. Nonlinear equations relate the parameters generally do not provide unique solutions, and consequently (links) mechanical may form various configuratxons. The authors propose method for determination configurations this associated displacement functions are based on singularities in motion system. Applica tion to execution prescribed trajectories Uni...

In this work, we develop DeepWiPHY, a deep learning-based architecture to replace the channel estimation, common phase error (CPE) correction, sampling rate offset (SRO) and equalization modules of IEEE 802.11ax based orthogonal frequency division multiplexing (OFDM) receivers. We first train DeepWiPHY with synthetic dataset, which is generated using representative indoor models includes typical radio (RF) impairments that are source nonlinearity in wireless systems. To further evaluate...

When designing mechanical assemblies, assembly tolerance design is an important issue which must be seriously considered by designers. Assembly tolerances reflect functional requirements of assembling, can used to control assembling qualities and production costs. This paper proposes a new method for networks assemblies. The establishes the structure tree model based on its product model. On this basis, information relation are set up polychromatic sets (PS) theory. According two models,...

Channel reciprocity is one of the primary superiorities time-division duplexing-based massive multiple-input multiple-output systems. However, uplink and downlink cannot be realized due to inevitable radio-frequency (RF) impairments in practice. In this paper, presence carrier frequency offset (CFO), quasi-static RF mismatch channel estimation error, we derive closed-form expressions achievable rate for matched filter (MF) zero-forcing (ZF) precoders. Herein, concentrate on two oscillator...

In this paper, we develop algorithms for joint user scheduling and three types of mmWave link configuration: relay selection, codebook optimization, beam tracking in millimeter wave (mmWave) networks. Our goal is to design an online controller that dynamically schedules users configures their links minimize system delay. To solve complex problem, model it as a dynamic decision-making process two reinforcement learning-based solutions. The first solution based on deep learning (DRL), which...

Millimeter-wave (mmWave) communications, using directional beams, is a key enabler for high-throughput mobile ad hoc networks. These beams are organized into multiple codebooks according to beam resolution, with each codebook consisting of set equal-width that cover the whole angular space. The code-book narrow delivers high throughput, at expense scanning time. Therefore overall throughput maximization achieved by selecting mmWave balances between beamwidth (beamforming gain) and alignment...

Establishing and maintaining millimeter-wave (mm-wave) links are challenging due to the changing environment high sensibility of mm-wave signals user mobility channel conditions. mm-Wave link configuration problems often involve a search for optimal system parameter(s) under environmental uncertainties from finite set alternatives that supported by hardware protocol. For example, beam sweeping aims at identifying beam(s) data transmission discrete codebook. Selecting parameters such as...

This paper investigates the effect of robot adoption on employment adjustment at firm level in China. Using an instrument that exploits source firm-level variation adoption, we find using industrial robots increases within firms, especially when focusing high-educated and high-skilled individuals. We further analyze mechanisms underlying strong support for productivity adopters gain improvement thereby increase their demand labor. In addition, limited evidence intra-industry labor...

A robotic bevel-gear train with three input parameters is considered. The contents of this paper cover: (1) derivation basic kinematic equations that relate the parame ters and end-effector direction cosines, (2) determination singularities in motion gear train, (3) com putational procedure for invert kinematics.

Designing efficient and robust beam alignment strategies for millimeter wave (mmWave) systems is important overcoming training overheads practical hardware impairments. In this work, we leverage side information in the form of prior knowledge angular support propagation channel (direction information) to design a compressive sensing (CS) based algorithm. Existing CS estimation approaches assume perfect phase measurements, which not case with low-cost off-the-shelf mmWave phased arrays....

A probe for wireless monitoring of the vaginal conductivity and temperature in cows has been developed, manufactured, tested in-situ approximately 48 hours. The cow was filmed during testing, events activities correlated with obtained data. This allowed systematic variations due to stress, position activity, as well circadian patterns, be identified. three electrode pairs measurements that are probed consecutively, which allow related investigated. One main applications this type sensor is...

This paper proposes a novel location-based multi-group multicast framework, which is termed non-orthogonal multiple access (NOMA)-assisted multi-region geocast. spectrum sharing framework exploits the NOMA technology to realize simultaneous delivery of different messages user groups characterized by geographical locations. The essence proposed that information unites and enhance spectral efficiency (SE) energy (EE) wireless transmissions. Specifically, we investigate downlink beamforming...

Backscatter wireless communication is an emerging technique widely used in passive radio frequency identification (RFID) systems. Recently, the requirement of a high data rate, reliability, and secure transmission becoming main driving force for development RFID systems, which motivates introduction multiple-input multiple-output (MIMO) schemes physical layer security techniques into backscatter In this paper, combination multiple antennas exploited to improve level We propose...

A scalable video delivery transmission framework over MIMO OFDM wireless channels by combining power allocation and antenna selection scheme has been proposed. The consisting of independently decodable layers (3D ESCOT), UEP channel coding structure, provide more system error resilience even during deep fading period in channels. new algorithm is proposed to obtain the optimal rate among multiple layers, subject constraints on total level. This joint enables us both overcome challenge full...

In this paper, we study the secrecy throughput in millimeter wave systems under slow fading channels considering multipath propagation. For specific propagation characteristics of wave, provide transmission scheme designs and a comprehensive performance analysis. Specifically, maximize outage probability (SOP) constraint through dynamic parameter scheme, optimal solution to parameters, including codeword rate power allocation ratio information signal total transmit power. We find that system...

We consider signal detection in amplify-and forward wireless relay networks when we have an imperfect partial channel estimate available at the destination. Channel state information is required coherent distributed space-time coding employed relays. For case of maximum a posteriori detection, propose modified detector formulation that takes variance estimation errors into account. Although proposed modification based on some simplifying assumptions distribution and noise, show it permits...

In Multiuser Multiple-Input Multiple-Output (MU-MIMO) downlink systems, the zero-forcing algorithm is a simple and effective technique for separating users data streams of each user at transmitter side, but its performance depends greatly on accuracy available channel state information (CSI) transmitter. Due to existence CSI delay estimation error in practical always imperfect, which degrades system significantly. this paper, by using correlation between actual estimated one as well...