Millimeter wave (mmWave) communications have been considered as a key technology for next generation cellular systems and Wi-Fi networks because of its advances in providing orders-of-magnitude wider bandwidth than current wireless networks. Economical energy efficient analog/digial hybrid precoding combining transceivers often proposed mmWave massive multiple-input multiple-output (MIMO) to overcome the severe propagation loss channels. One major shortcoming existing solutions lies...

In mmWave communication systems, existing hybrid beamforming solutions generally require a large number of high-resolution phase shifters (PSs) to realize analog beamformers, which still suffer from high hardware complexity and power consumption. Targeting at this problem, article introduces novel hardware-efficient precoding/combining architecture, only employs limited simple over-samplers (POSs) switch (SW) network achieve maximum efficiency while maintaining satisfactory spectral...

This letter investigates analog/digital hybrid precoder and combiner design for millimeter wave (mmWave) multiuser multiple-input multiple-output (MU-MIMO) systems. We propose a novel iterative algorithm the joint by exploiting duality of uplink downlink MU-MIMO channels. For initialization stage, proposed selects analog precoder-combiner pair based on orthogonal matching pursuit (OMP) to enhance channel gain, while mitigating multiple access interference, obtains digital via minimum mean...

Millimeter wave (mmWave) communication has become a key enabling technology for 5G and beyond networks because of its large bandwidth high transmission rate. In vehicular mmWave system, beam tracking is challenging task due to the user's fast mobility narrow transmission. this paper, we study intelligent scheme with low training overhead Specifically, utilize past channel state information (CSI) efficiently predict future by designing machine learning prediction model. Using such predicted...

Millimeter wave (mmWave) communication is considered as a key enabling technology for 5G cellular networks because abundant spectrum in mmWave bands can provide multi-gigabit service. Analog beamforming architecture, which employs energy-efficient phase shifters (PSs) instead of energy-hungry radio frequency (RF) components, has emerged promising solution to overcome severe propagation loss channels. On the other hand, multicast another efficient approach address dramatic traffic demand by...

Millimeter-wave (mmWave) communications with large-scale antenna arrays have been deemed as a key technology for future 5G networks. Analog beamforming implemented by low-resolution phase shifters (PSs) has widely considered because of its significant advantages low hardware complexity and power consumption. Antenna selection is an efficient approach to compensate the accuracy loss due use PSs utilizing augmented diversity. In this letter, we consider joint transmit analog beamformer design...

Millimeter wave (mmWave) communications have been considered as a key technology to enable very high data rate in the fifth-generation applications. Multiple-input-multiple-output (MIMO) systems with hardware efficient analog/digital hybrid beamformer architecture widely overcome severe propagation loss of mmWave channels. However, physical layer security wiretap MIMO and secure design not well investigated. In this paper, we consider problem for transmission order protect legitimate from...

Cell-free millimeter-wave (mmWave) multiple-input multiple-output (MIMO) communications have been proposed as promising enablers for the next generation wireless networks. In this paper, we study user association and hybrid beamforming in cell-free mmWave systems without full channel state information (CSI) acquisition. We consider a cloud radio access network (C-RAN), where multiple remote heads (RRHs) are distributed to communicate with users via analog beamforming, connected centralized...

Millimeter wave (mmWave) communications have been considered as a key technology for future 5G wireless networks. In order to overcome the severe propagation loss of mmWave channel, multiple-input multiple-output (MIMO) systems with analog/digital hybrid precoding and combining transceiver architecture widely in systems. However, physical layer security (PLS) MIMO secure beamformer design not well investigated. this paper, we consider problem precoder combiner transmission protect legitimate...

Analog precoder was introduced recently to millimeter wave (mmWave) systems with large-scale antenna arrays as a promising hardware-efficient transceiver architecture. In practice, low-resolution phase shifters (PSs) are generally adopted achieve low hardware cost and power consumption, which, however, makes fine beam tuning challenging. Recent achievements in selection technology motivate us exploit the augmented diversity of array compensate accuracy loss caused by this PS implementation....

Economical and energy-efficient analog/digital hybrid beamforming has been widely considered as a promising approach for millimeter wave (mmWave) multiple-input multiple-output (MIMO) systems. While most techniques consider fully-connected structure with large number of phase shifters (PSs), the partially-connected drawn more attention recently since it requires much less PSs can further improve energy-efficiency. However, impractical assumption infinite or high resolution in existing...

This paper considers the cloud radio access network (C-RAN) based millimeter-wave (mmWave) cell-free communications, where multiple remote heads (RRHs) are distributed to provide reliable communication links users via analog beamforming and connected centralized baseband unit (BBU) which carries out digital signal processing. We aim jointly design user association analog/digital hybrid along with fronthaul compression maximize minimum interference-plus-noise ratio (SINR) among while...

Geographical simulation is a popular method in geographical and environmental research. Many models developed to address geographic issues are distributed worldwide. However, due the lack of portals, these still difficult invoke for simulations open web environments. This study designs develops framework assemble service-oriented from volunteers worldwide on web. The consists three layers (task layer, data exchange model execution layer) that establish network locally shared tasks user...

Analog beamformer with large-scale antenna arrays has been widely considered in millimeter wave (mmWave) communication systems because of its superiority hardware cost and energy consumption compared traditional fully digital beamforming schemes. In this paper, we introduce an efficient dynamic subarray analog architecture low-resolution phase shifters (PSs) for mmWave multiuser multipleinput single-output (MU-MISO) systems. effort to mitigate the performance loss due use low- resolution...

This paper investigates hybrid beamforming for cooperative multi-user millimeter-wave (mmWave) multiple-input multiple-output (MIMO) networks. We aim to jointly design the user scheduling and maximize sum-rate subject transmit power of each base station. Due non-convexity constant modulus phase shifters objective function, problem is mathematically intractable. propose a low-complexity two-step scheme, in which analog are first obtained sum-beamforming-gain, followed by digital calculation...

Predictive analysis on cellular traffic is important for the control and monitoring of wireless networks. Cellular prediction a challenging problem due to non- stationarity dynamic spatial-temporal correlation traffic. In this paper, we address accurate in base station by proposing deep neural network called RAConv. Its structure includes residual network, attention mechanism, convolutional network. proposed architecture, 3D (ResConv3D) with three blocks are employed learn local features. An...

Integrated sensing and communications (ISAC) has emerged as a promising technology for predictive beamforming design in vehicle-to-infrastructure (V2I) networks. Most of the existing works use two-step approach design. The first step is to estimate state parameters vehicle (e.g., angle arrival (AoA), channel information (CSI)) from received signal samples at road side unit (RSU). second determine vector based on estimated parameters. However, estimation errors may be introduced which impacts...

Acting like a legitimate user via sending identical pilot signals, the spoofing attack launched by an active eavesdropper can disrupt reception of receiver and, more importantly, cause severe information leakage. Although such be detected recently presented random-training-aided (RTA) detector with high accuracy and low complexity, assumption that remains silent during random phase limits usage RTA algorithm in practice. In addition, natural question to ask is how secure data transmission...

This paper investigates analog beamforming with large-scale antenna arrays for single-group multicast transmission. We focus on the max-min fair (MMF) problem and aim to design beamformer infinite finite resolution phase shifters (PSs), respectively, maximize minimum signal-to-noise ratio (SNR) over all users subject a transmit power constraint. However, constant magnitude infinite/finite constraints imposed by PSs frustrate access of an optimal solution beamformer. thus formulate...

Inhibition of polydimethylsiloxane (PDMS) polymerization could be observed when spin-coated over vinyl substrates. The degree polymerization, partially curing or fully curing, depended on the PDMS thickness coated substrate. This characteristic was exploited to achieve simple and fast patterning method using a adhesive layer patterned through cutting plotter. proposed showed results resembling etching. Therefore, PDMS, glass, silicon, gold substrates were tested compare with conventional...