Communication in millimeter wave (mmWave) and even terahertz (THz) frequency bands is ushering a new era of wireless communications. Beam management, namely initial access beam tracking, has been recognized as an essential technique to ensure robust mmWave/THz communications, especially for mobile scenarios. However, narrow beams at higher carrier lead huge measurement overhead, which negative impact on acquisition tracking. In addition, the management process further complicated by...

Deploying ultra-dense networks that operate on millimeter wave (mmWave) band is a promising way to address the tremendous growth mobile data traffic. However, one key challenge of mmWave network (UDmmN) beam management due high propagation delay, limited coverage as well numerous beams and users. In this paper, novel systematic control scheme presented tackle problem which difficult nonconvex objective function. We employ double deep Q-network (DDQN) under federated learning (FL) framework...

For future networks [i.e., the fifth generation (5G) wireless and beyond], millimeter-wave (mmWave) communication with large available unlicensed spectrum is a promising technology that enables gigabit multimedia applications. Thanks to short wavelength of mmWave radio, massive antenna arrays can be packed into limited dimensions transceivers. Therefore, directional beamforming, both transmitters (MTXs) receivers (MRXs) are capable supporting multiple beams in 5G networks. However, for...

Recently, millimeter-wave (mmWave) and even terahertz wireless (with higher frequency) networks have attracted significant research interests as alternatives to support the formidable growth of communication services. Normally, directional beamforming (BF) is shown a promising technique compensate its high path loss. We focus on mmWave communications assume that both base stations (MBSs) user equipments (UEs) can BF. As spectrum has short wavelength, massive antenna arrays be deployed at...

Millimeter-wave (mm-wave) communication has attracted increasing attention as a promising technology for 5G networks. One of the key architectural features mm-wave is possibility using large antenna arrays at both transmitter and receiver sides. Therefore, by employing directional beamforming, base stations (MBSs) user equipments (MUEs) are capable supporting multi-beam simultaneous transmissions. However, most existing research results have only considered single beam. Thus, potentials not...

Due to the long-distance communication and limited resources, traditional full offloading algorithms cannot fully exploit radio computation which may cause more delays higher energy consumption in mobile edge computing (MEC)-based vehicle-to-everything (V2X) networks. To solve this problem, a novel resource allocation (RA) algorithm with partial for uplink multiuser MEC-based V2X networks is proposed. The optimization objective minimize weighted sum of subject constraints on delay...

Super-resolution is the problem of generating one or a set high-resolution images from sequence low-resolution frames. Most methods have been proposed for super-resolution based on multiple low resolution same scene, which called multiple-frame super-resolution. Only few approaches produce image single image, with help training scenes different types. It referred to as single-frame This article reviews variety in recent years. In paper, new manifold learning method: locally linear embedding...

Cognitive radio and backscatter communication (BackCom) have been viewed as two promising technologies for the future green Internet of Things (IoT). The combination these can not only enhance spectrum efficiency but also improve energy efficiency. However, most existing resource allocation (RA) algorithms in cognitive BackCom networks consider ideal channel state information a time division multiple access protocol, which is unrealistic practical systems support massive number accessing...

In recent years, the electronic nose (E-nose) technology has made a great progress in practical application. However, interferences, such as interferences from non-target gas, manufacturing deviation and sensor drift, have negative impact on detection accuracy during real-time process, which will affect industrialization commercialization of E-nose. Thus, it is necessary to research method interference suppression for realizing long-term stable detection. This paper proposes sparse...

To explore the potential of multiple collaborative reconfigurable intelligent surfaces (RISs) for millimeter wave (mmWave) communications, in this letter, we consider a double-RIS-aided multi-user mmWave uplink communication system, which aims to maximize system throughput by jointly optimizing transmission power, active beamforming, and passive beamforming. address challenging problem, low complexity optimization algorithm with semi-closed-form solution employing fractional programming...

In this paper, we investigate the joint unmanned aerial vehicle (UAV) deployment and resource allocation problem to minimize latency of multi-UAV-assisted computation offloading in air-ground integrated millimeter-wave (mmWave) networks, which UAVs have both computing relaying capabilities, thereby providing more opportunities for ground user equipments (UEs) access moble edge (MEC) servers with rich resources. Moreover, study also takes into account dynamic interference experienced by UEs...

For ultra-dense networks, user-centric architecture is regarded as a promising candidate to offer mobile users better quality of service. One the main challenges exploring efficient scheme for user association in network. In this letter, we study dynamic (UCA) problem millimeter wave (mmWave) networks provide reliable connectivity and high achievable data rate. We consider time-varying network environments propose deep Q-network based UCA find optimal policy on historical experience....

Owing to the deployment flexibility, unmanned aerial vehicles (UAVs), equipped with lightweight base stations (BSs), provide a new paradigm for wireless access from sky temporarily complement terrestrial networks, which bring benefits many applications, such high-speed railway (HSR) communications. In UAV-assisted communications, advantage of line sight (LOS) dominant air-ground channels makes it more attractive apply directional millimeter wave (mmWave) where beam management is highly...

Exploiting highly directional antenna arrays to compensate for severe propagation loss is one of the defining features in millimeter-wave (mmWave) communications. With efficient beamforming techniques, mmWave transceivers can form steerable narrow beams. Therefore, different from convenient microwave networks, signal or interference power communications and closely related critical parameters such as distance angles departure/arrival. The high directivity implies that co-channel among...

Symbiotic radio is a new communication paradigm for improving spectrum efficiency and system capacity. However, most of the existing resource allocation algorithms do not consider impact channel estimation errors information leakage. To improve transmission security robustness, in this letter, we investigate robust secure problem downlink multiuser symbiotic network with imperfect station (CSI) eavesdroppers. Based on bounded CSI error models, overall throughput maximized subject to rate...

The abundant available spectrum resources have made millimeter wave (mmWave) communications the key feature of fifth generation (5G) mobile communications, allowing ultra-high transmission capacity. Additionally, mmWave bands, already widely used in radar systems, show a great advantage environment sensing. Based on these observations, to satisfy ever-growing service requirements, and meanwhile improve maintenance efficiency for high-speed railways (HSRs), this paper, we present joint...

In the application of oil-air lubrication system, electrical capacitance tomography (ECT) provides a promising way for monitoring oil film in pipelines by reconstructing cross sectional distributions real time. While case small diameter pipe and thin film, thickness is hard to be observed visually since interface air not obvious reconstructed images. And existence artifacts reconstructions has seriously influenced effectiveness image segmentation techniques such as level set method. Besides,...

Intelligent reflecting surface (IRS) has been considered as a promising technology to alleviate the blockage effect and enhance coverage in millimeter wave (mmWave) communication. To explore impact of IRS on performance mmWave communication, we investigate multi-IRS assisted communication network formulate sum rate maximization problem by jointly optimizing active passive beamforming set IRSs for assistance. The optimization is intractable due lack convexity objective function binary nature...

Millimeter wave (mmWave) communication has attracted increasing attention as a promising technology for 5G networks. One of the key architectural features mmWave is use massive antenna arrays at both transmitter and receiver sides. Therefore, by employing directional beamforming (BF), base stations (MBSs) users (MUEs) are capable supporting multi-beam simultaneous transmissions. However, most researches have only considered single beam, which means that they do not make full potential...

Millimeter-Wave (mmWave) communication has been considered as one of enabling technologies for the sixth generation (6G) network and beyond to boost system throughput, which however is hard provide robust reliable transmissions since it easy be blocked. Coordinated multi-beam transmission emerged an effective way overcome this challenge. In letter, we first define incomplete blockage probability a correlated each user equipment (UE) measure robustness reliability in coordinated...