Terahertz (THz) communications open a new frontier for the wireless network thanks to their dramatically wider available bandwidth compared current micro-wave and forthcoming millimeter-wave communications. However, due short length of THz waves, they also suffer from severe path attenuation poor diffraction. To compensate THz-induced propagation loss, this paper proposes combine two promising techniques, viz., massive multiple input output (MIMO) intelligent reflecting surface (IRS), in...

Intelligent reflecting surface (IRS) is envisioned as a promising technology to broaden signal coverage and enhance transmission in terahertz (THz) communications. Due the passivity of IRS, channel measurement can not be achieved by traditional pilot manner subsequent cooperative design remains an open problem. This paper investigates estimation solutions for massive multiple input output (MIMO) IRS-assisted THz system. The realized beam training quantization error analyzed evaluating...

Future networks are envisioned to create digital twin representations of the physical world, motivated by integrated sensing and communication (ISAC). To meet needs, millimetre wave (mmWave) terahertz (THz) signals shine with outstanding performance in high-speed transmission high-accuracy perception, but requiring narrow beamwidth compensate for high path-loss. It turn causes severe beam misalignment that induces link failures, leaving reliable inter-cell handovers intra-cell switches...

Terahertz (THz) band has attracted increasingly attention from the academic and industry for communications, as it enables gigabit-level data rates 6G. However, compared to sub-6GHz signals, THz signals suffer more severe coverage issue due significant propagation loss vulnerability line-of-sight (LoS) blockage, which hinders applications of communications. In this article, we propose an integrated sensing communications (ISAC) assisted beam management technology tackle issue. First, review...

Terahertz (THz) communication has been envisioned as a key technology for providing ultra-wide bandwidth and high-speed data transmission in future networks. However, THz band signal suffers from frequency-dependent path-loss, molecular absorption line-of-sight (LoS) blockage. Thus, coverage modelling networks essential difference low-band In this letter, considering blockage, directional antennas absorption, we develop an analytical model probability analysis outdoor based on stochastic...

Low-temperature growth of c-axis oriented aluminum nitride (AlN) thin films on silicon (Si) substrates by reactive rf magnetron sputtering was investigated. The structural and morphological characterizations determined x-ray diffraction (XRD) measurement scanning electron microscopy (SEM) were found to be sensitive the deposition conditions, such as pressure, power, substrate temperature, N2 concentration. A strong AlN (002) preferred orientation perpendicular surface identified at...

Aluminum nitride (AlN) thin films are deposited on Corning 7059 glass at low substrate temperature by reactive RF magnetron sputtering. The structural and morphological characterizations found to be sensitive deposition conditions such as sputtering pressure, power, N 2 concentration. A highly oriented AlN (002) plane parallel the surface is identified X-ray diffraction (XRD) measurement a dense pebble-like texture observed scanning electron microscopy (SEM). cross-sectional SEM micrograph...

Terahertz (THz) communications open a new frontier for the wireless network thanks to their dramatically wider available bandwidth compared current micro-wave and forthcoming millimeter-wave communications. However, due short length of THz waves, they also suffer from severe path attenuation poor diffraction. To compensate THz-induced propagation loss, this paper proposes combine two promising techniques, viz., massive multiple input output (MIMO) intelligent reflecting surface (IRS), in...

Based on the Fujian coal resource utilization and distribution, samples from Peifeng mining were chosen as research object. This paper studies effects of deashing with oil agglomeration technology, which mainly includes size, concentration, types its dosage, alcohol PAM dosage. The results showed that ash content can be reduced 32% to 2.8% by one time rejection rate is arrived 93.0% when slurry concentration 11.1% dosage 12.5%.

Terahertz (THz) communication is capable of providing ultra-wide bandwidth and high data rates. Therefore attracts widespread attention to its applications in next-generation networks. Highly directional antennas are used compensate for the THz propagation loss, which also incurs beam management challenges. Specifically, caused by node mobility blockage, frequent reselections misalignment greatly degrade network performance terms reliability spatial throughput. In this paper, using...

c-axis oriented aluminum nitride (AlN) films deposited on GaAs substrates by reactive rf magnetron sputtering were fabricated. The structural and morphological characterizations found to be sensitive the deposition conditions including power, N2 concentration, pressure substrate temperature. A highly AlN film was identified as low 350 °C x-ray diffraction. crystallization of with (002) preferred orientation tended improve increased power concentration within experimental range. densely...

This paper investigates the optimal secure beam steering design of millimeter wave (mmWave) communications, where an Alice-Bob pair wishes to communicate in secret presence Eve, with each node equipped large-scale antenna arrays. Owing reduced peak-to-average power ratio and hardware cost, emerges as attractive technique mmWave communications recently. However, from physical layer perspective, subject security requirement has not been investigated yet. In this paper, we consider a secrecy...

Samples from Peifeng were studied to further investigate the influence of particle specific surface area, oil dosage, system energy input and concentration electrolyte on cleaning Fujian coal with agglomeration. The results showed that area particles around 24m2 g-1 led minimum value ash content 3.14% obtained, sulfur decrease 2.0% 0.44%; After 10 min stirring at 2400r min-1, product 3.8% was obtained. Within dosage range studied, considerable reduction occurred NaCl in appropriate...

As a key pillar technology for the future 6G networks, Terahertz (THz) communications can provide high-capacity transmissions, but suffers from severe propagation loss and line-of-sight (LoS) blockage that limits network coverage. Narrow beams are required to compensate loss, they in turn bring beam misalignment challenge degrade THz The high sensing resolution of signals enables integrated (ISAC) assist LoS user mobility-induced misalignment, enhancing Based on 5G management, we propose...

Intelligent reflecting surface (IRS) is envisioned as a promising technology to broaden signal coverage and enhance transmission in terahertz (THz) communications. Due the passivity of IRS, channel measurement can not be achieved by traditional pilot manner subsequent cooperative design remains an open problem. This paper investigates estimation solutions for massive multiple input output (MIMO) IRS-assisted THz system. The realized beam training quantization error analyzed evaluating...

Array-of-subarrays (AoSA) is an appealing architecture in terahertz (THz) communications since the analog beamformers on sub arrays can provide beam gain to combat severe propagation loss, by low-cost phase shifters. However, traditional beamforming scheme for AoSA, i.e., each subarray serves exclusive user, cannot cope with effect of split THz wideband communications. In this paper, we propose a novel concept, aggregation and multiplexing (BSAM), support communication AoSA architecture....

The ultra-wide Terahertz (THz) band with jointly high-speed transmission and precise sensing has come into vision to realize integrated communication (ISAC) for emerging immersive applications. However, THz networks face a coverage bottleneck. Narrow beams are exploited compensate the limited signal power path loss. But they bring in beam misalignment that degrades link connectivity affects network coverage, characterized by probability. ISAC-THz can benefit from sensing-aided alignment...

This paper exploits the potential of millimeter wave (mmWave) system, where large-scale antenna arrays are allowed to implement in small physical dimension. We investigate a novel hybrid beamforming design for joint data and artificial noise (AN) precoding power fraction selection massive multi-input multi-output (MIMO) system. aim at secrecy rate maximization problem with respect precoders design. The challenge this lies its non-convexity. To address issue, we decouple analog digital...

Abstract The 2-bit/cell nitride-trapping device (NROM/Nbit) is an important type of NVM (Non-Volatile Memory). NROM/Nbit a potential candidate for replacing FG-type devices below the 45nm node. In this study, electrical and physical failure analyses (PFA) were used. mechanisms root causes test vehicle, 130nm NBit device, determined. Because cell dimensions spacing requirements high-density memory are quite aggressive, these observations help to optimize process improve yield.

In recent years, passive localization has been applied in various fields. However, the accuracy of base stations' positions significantly influences performance system. To address problem presence position errors, this paper presents a method that intro-duces calibration sources into system and jointly calibrates errors stations, sources, targets. The core idea proposed algorithm is based on Gauss-Newton iteration method. Simulation results demonstrate effectiveness improving