Research and development on the next generation wireless systems, namely 5G, has experienced explosive growth in recent years. In physical layer (PHY), massive multiple-input-multiple-output (MIMO) technique use of high GHz frequency bands are two promising trends for adoption. Millimeter-wave (mmWave) such as 28 GHz, 38 64 71 which were previously considered not suitable commercial cellular networks, will play an important role 5G. Currently, most 5G research deals with algorithms...

Unmanned aerial vehicles (UAVs) for wireless communications have rapidly grown into a research hotspot as the mass production of high-performance, low-cost, and intelligent UAVs becomes practical. In meantime, fifth generation (5G) communication Internet-of-Things (IoT) technologies are being standardized planned global deployment. During this process, becoming an important part 5G IoT, expected to play crucial role in enabling more functional diversity communications. paper, we first...

The fifth generation (5G) research and development has been fueled by many new breakthroughs in various areas. recent progress carrier aggregation (CA), licensed assisted access (LAA), massive MIMO (MaMi), beamforming techniques, cooperative spectrum sensing (CSS), compressive (CS), machine learning, etc., provided inspiring promising approaches to address 5G beyond challenges. However, at the user equipment (UE) end, limited design budget hardware resources bring along a series of...

The rapid advancement of Internet Things (IoT) and fifth generation beyond technologies is transforming the marine industry research. Our understanding vast sea that covers 71% Earth's surface being enhanced by various ocean sensor networks equipped with effective communication technologies. In this article, we begin a review research development status-quo Maritime IoT (MIoT) enabled multiple wireless Then, study impact waves on radio propagation communications link quality. Due to severe...

At the dawn of next-generation wireless systems and networks, massive multiple-input multiple-output (MIMO) in combination with leading-edge technologies, methodologies, architectures are poised to be a cornerstone technology. Capitalizing on its successful integration scalability within 5G beyond, MIMO has proven merits adaptability. Notably, series evolutionary advancements revolutionary trends have begun materialize recent years, envisioned redefine landscape future 6G networks. In...

Unmanned aerial vehicles (UAVs) are being integrated as an active element in 5G and beyond networks. Because of their flexibility mobility, UAV base stations (UAV-BSs) can be deployed according to the ground user distributions quality-of-service (QoS) requirement. Although there has been quite some prior research on deployment, no work studied this problem a 3-D setting taken into account UAV-BS capacity limit QoS requirements users. Therefore, article, we focus deploying UAV-BSs provide...

With the fifth-generation (5G) networks widely commercialized and fast deployed, sixth-generation (6G) wireless communication is envisioned to provide competitive quality of service (QoS) in multiple aspects global users. The critical underlying research 6G is, firstly, highly dependent on precise modeling characterization propagation when spectrum believed expand terahertz (THz) domain. Moreover, future networks' power consumption energy efficiency are factors consider. In this research,...

Motivated by providing solutions to design challenges of coexisting cellular and WiFi for future 5G application scenarios, this paper, first, conducts an in-depth investigation current technological trends from user equipment (UE) perspective, then presents a cost-effective cellular-WiFi methodology based on the new distributed phased array MIMO (DPA-MIMO) architecture practical UE devices as example. Furthermore, additional scenarios co-operation details within heterogeneous networks are...

As the Internet of Things (IoT) continues to expand and reshape our world, new vertical application scenarios have emerged, such as underwater communications, leading increased interest in academia industries. The multiple-input–multiple-output (MIMO) technology plays a critical role enhancing channel capacity for acoustic (UWA) where accurate prediction is essential system performance. In this article, we propose novel efficient impulse response (CIR) model UWA MIMO communications with...

Millimeter-wave (mmWave), massive multiple-input multiple-output (MIMO), are expected to play a crucial role for 5G and beyond cellular next-generation wireless local area network (WLAN) communications. Moreover, unmanned aerial vehicles (UAVs) also considered as an important component of networks. In this paper, we propose present mmWave distributed phased-arrays (DPA) architecture proof-of-concept (PoC) designs user equipment (UE) which will be used in 5G/Beyond communication Through...

In light of China’s ambitious "dual carbon" targets, accurate emission predictions are essential for effective reduction strategies. Traditional forecasting methods often fail to capture the complex nonlinear relationships in data, whereas Boosting algorithms enhance prediction accuracy by addressing these challenges. This study leverages algorithms, a state-of-the-art ensemble learning technique, predict future carbon emissions Hebei. By incorporating critical factors such as industrial...

Abstract Layered quasi‐two‐dimensional (quasi‐2D) halide perovskites have emerged as a promising platform for high‐efficiency electroluminescence. Narrowing the multi‐quantum well distribution and eliminating wide‐bandgap 2D phases are crucial achieving flat energy landscape, minimizing loss, ensuring high‐color‐purity emission. Here, it is demonstrated that solution‐processed quasi‐2D perovskite films with broad component distributions arise from an incomplete kinetic transition low‐ n ( ,...

Distributed phased arrays based multiple-input multiple-output (DPA-MIMO) is a newly introduced architecture that enables both spatial multiplexing and beamforming while facilitating highly reconfigurable hardware implementation in millimeter-wave (mmWave) frequency bands. With DPA-MIMO system, we focus on channel state information (CSI) acquisition hybrid precoding. As benefited from coordinated open-loop pilot beam pattern design, all the sub-arrays can perform sounding with less training...

Unmanned aerial vehicle (UAV)-assisted communications is a promising solution to improve the performance of future wireless networks, where UAVs are deployed as base stations for enhancing quality service (QoS) provided ground users when traditional terrestrial unavailable or not sufficient. An effective framework proposed in this paper manage dynamic movement multiple unmanned vehicles (UAVs) response user mobility, with objective maximize sum data rate users. First, we discuss relationship...

The fifth-generation (5G) and beyond networks are designed to efficiently utilize the spectrum resources meet various quality of service (QoS) requirements. unlicensed frequency bands used by WiFi mainly deployed for indoor applications not always fully occupied. cellular industry has been working enable coexistence. In particular, 5G New Radio in channel (NR-U) supports uplink downlink transmission on maximum occupation time (MCOT) duration. this paper, we consider maximizing total...

Unmanned aerial vehicles (UAVs) for wireless communications has rapidly grown into a research hotspot as the mass production of high-performance, low-cost, intelligent UAVs become more practical and feasible. In meantime, fifth generation (5G) is being standardized planned deployment globally. During this process, are gradually considered an important part 5G expected to play critical role in enabling functional diversity communications. article, we conduct in-depth investigation mainstream...

With the fifth-generation (5G) mobile networks being actively standardized and deployed, many new vehicular communications technologies are developed to support enrich various application scenarios. Unmanned aerial vehicle (UAV) enabled emerges as one of promising solutions constructing next-generation highly reconfigurable networks. In this article, we first investigate envision challenges future UAV applications from net-work, system, hardware design perspectives, then pre-sent a base...

Our study proposes a UAV communications recovery strategy under meteorological conditions based on ray tracing simulation of excessive path loss in four distinct three-dimensional (3D) urban environments. We start by reviewing the air-to-ground propagation model conditions, as well specific attenuation rain, fog, and snow, we propose new expression for line-of-sight (LoS) probability. Using two frequency bands 28 GHz 71 GHz, investigate impact caused different weather analyze relationship...

Through ray tracing simulation on three-dimensional (3D) urban environments, we characterize air-to-ground (A2G) channels for 5G and beyond wireless communications. In this study, review four types of elevation angle-dependent probability line-of-sight (LoS) expressions according to building distribution types. With channel characterization data extracted from the (RT) simulation, LoS versus angle agrees better with that assumes buildings are randomly distributed. Furthermore, provide a more...

This paper presents a low-cost wideband 60-GHz on-chip Artificial Magnetic Conductor (AMC) Yagi antenna utilizing standard 0.13-μm CMOS process. The stand-alone is designed based on four-element topology in coplanar waveguide (CPW), using the top thick metal and layer M2. Furthermore, by designing integrating an optimized AMC plane, which has very wide fractional bandwidth of 31%, radiation efficiency this novel significantly improved more than 90% compared to common without AMC. simulation...

Transmitted reference pulse cluster (TRPC) signaling was recently proposed and developed for noncoherent ultra-wideband (UWB) communications. In this paper, a practical passband TRPC-UWB system is designed analyzed to deal with the carrier frequency offset, phase noise inherent in voltage-controlled oscillators (VCO) of transmitter receiver. Based on general model noisy VCO employing some reasonable assumptions, an equivalent linear time-invariant analytical obtained facilitate bit error...