High temperature operation (250–340 K) of short-wavelength interband cascade infrared photodetectors (ICIPs) with InAs/GaSb/Al0.2In0.8Sb/GaSb superlattice absorbers has been demonstrated a 50% cutoff wavelength 2.9 μm at 300 K. Two ICIP structures, one two and the other three stages, were designed grown to explore this multiple-stage architecture. At λ = 2.1 μm, two- three-stage ICIPs had Johnson-noise-limited detectivities 5.1 × 109 5.8 cm Hz1/2/W, respectively, The better device...

Practical applications of all-optical regeneration require from it a graceful scalability with the number wavelength-division-multiplexed (WDM) channels. We describe several main approaches to WDM-compatible and review in greater detail two recent demonstrations 16-channel regeneration: one using time-lensing other group-delay-management. discuss scalability, practical issues, outlook for these WDM methods.

Cognitive Radio technology improves spectrum utilization by enabling secondary users to access primary user's unutilized in an opportunistic manner. However, it causes disruptions both and communication leads high switching overhead. In this paper, we propose a novel proactive handoff approach based on time estimation(TPSH) reduce the increase channel efficiency. Secondary utilize past histories maintain estimation vector of remaining idle period make predictions future availability, then...

This paper proposed an original four-layer architecture of MEC support for C-V2X system, summarizing the participants in scenarios and logical relationship between participants. Three novel APIs are designed to meet requirement end-to-end service under system architecture. The general process our is also considered this with two typical CV2X user cases as examples: HD Map Intelligent Intersection.

The multiple-input multiple-output (MIMO)-enabled beamforming technology offers great data rate and channel quality for next-generation communication. In this paper, we propose a beam model enable it with time-varying simulation capability by adopting the stochastic geometry theory. First, clusters are generated located within transceivers' ranges based on Matern hardcore Poisson cluster process. line-of-sight, single-bounce, double-bounce components calculated when generating complex...

In this work, we report the demonstration of quaternary GaInAsSb-based mid-wavelength infrared photodetectors with cutoff wavelengths longer than 4 μm at 300 K. Both interband cascade photodetector (ICIP) a three-stage discrete absorber architecture and conventional one-stage detector structures have been grown by molecular beam epitaxy investigated in experiments for their electrical optical properties. High absorption coefficient gain were observed both structures. The ICIPs had superior...

Device-free passive intrusion detection is a promising technology to determine whether moving subjects are present without deploying any specific sensors or devices in the area of interest. With rapid development wireless technology, multi-input multi-output (MIMO) and orthogonal frequency-division multiplexing (OFDM) which were originally exploited improve stability bandwidth Wi-Fi communication, can now support extensive applications such as indoor detection, patient monitoring, healthcare...

We investigate high-temperature and high-frequency operation of interband cascade infrared photodetectors (ICIPs)-two critical properties. Short-wavelength ICIPs with a cutoff wavelength 2.9 μm had Johnson-noise limited detectivity 5.8×10⁹ cmHz^1/2/W at 300 K, comparable to the commercial Hg_1-xCd_xTe similar wavelengths. A simple but effective method estimate minority carrier diffusion length in short-wavelength is introduced. Using this approach,...

We demonstrate simultaneous regeneration of 12×10 Gb/s WDM channels in a group-delay-managed Mamyshev 2R regenerator. For signals degraded by broadband noise, eye opening improvements 3 dB or higher are observed for all 12 channels.

High-mobility In0.6Ga0.4As channel metal oxide semiconductor high electron mobility transistor (MOSHEMT) and field effect (MOSFET) are investigated based on simulation experiment in this paper. It is found that InAlAs barrier layer has a great influence the characteristics of MOSHEMT. MOSHEMT exhibits excellent electrical compared with MOSFET. The experimental results show effective 2812 cm2/V·s-1, which 3.2 times A 0.02 mm gate length shows higher drive current, peak transconductance,...

Zero-forcing precoding is a commonly-used multiple-user, multiple-input multiple-output beamforming technique. Applying such precoding, the signal-to-interference-plus-noise ratio (SINR) statistics with outdated channel state information, which involve various projections related to multi-dimensional vectors and vectors, have never been explicitly derived. In this paper, for single-output scenario uniform power allocation, distributions of these are derived, then SINR distribution...

An advanced comprehensive test system, designed for testing synergetic erosion due to cavitation and sand abrasion in hydraulic machinery, is presented this paper. This system includes an integrated rig, control platform, state-of-the-art measurement etc. For the there are three modes, Venturi-section water tunnel, rotating disc with jet nozzle. The maximum velocity 45 m/s tunnel mode, 85 mode. pressure range those two modes can be regulated within -0.09 MPa~0.6 MPa. highest flow relative...

This paper proposes a longitudinal protection scheme utilizing empirical wavelet transform (EWT) for through- type cophase traction direct power supply system, where both sides of network line exhibit distinctive boundary structure. approach capitalizes on the boundary's capacity to attenuate high-frequency component fault signals, resulting in variation transient energy ratio when faults occur inside or outside line. During internal faults, at checkpoints located ends surpasses that its...

Since the outbreak of world-wide novel coronavirus pandemic, crowd counting in public areas, such as shopping centers and commercial streets, has gained popularity among health administrations for preventing crowds from gathering. In this paper, we propose a adaptive method based on Wi-Fi channel state information (CSI) by using common wireless routers. Compared with previous researches device-free counting, our proposed is more to change environment can achieve high accuracy count...

We investigate three-channel performance of a stand-alone Mamyshev 2R regenerator based on Raman-assisted group-delay-managed medium. Our results indicate, for the first time to our knowledge, feasibility simultaneous regeneration 100-GHz-spaced WDM channels.

We discuss new possibilities in simultaneous and independent nonlinear-optical signal processing of multiple wavelength-division-multiplexing (WDM) channels that have been enabled by the recent development group-delay-managed (GDM) nonlinear medium, which high intra-channel nonlinearity can be accumulated without suffering from inter-channel crosstalk.

In this paper we present two different bit and power loading algorithms for the non-coherent multiband impulse UWB architecture. The first one is a very simple threshold based algorithm an extension of detect avoid (DAA) presented in [1]. second more powerful algorithm, enabling also loading. These allow efficient flexible spectrum use, higher data rates use less transmission power. error rate performance significantly improved. Both support inherent DAA.

In coherent optical communications, the relationship between singularity problem and polarization dependent loss when using constant modulus algorithm for adaptive demultiplexing are proposed. A theoretical quantitative description of this is given. The simulation results prove validity analysis.

We discuss simultaneous and independent 2R regeneration of many WDM channels, enabled by a group-delay-managed nonlinear medium, in which high intra-channel nonlinearity can be accumulated without suffering from the inter-channel crosstalk.

The train-to-ground communications for Hyperloop encounter numerous challenges compared to the previous systems as a result of ultrahigh velocity, metal confined tube, severe penetration attenuation, frequent handover, etc. Ultrareliable low latency communication (uRLLC) services are extremely pivotal operation Hyperloops since they responsible transmission safety-related messages like train control system (TCS) information. Furthermore, sporadic generated uRLLC traffic is strictly...