Articles tagged with Bandwidth
Researchers at the University of Rochester have generated an incredibly large bandwidth using a thin-film nanophotonic device, overcoming limitations of existing devices. The breakthrough could advance metrology, sensing, and quantum networks.
Researchers developed a novel spintronic-metasurface terahertz emitter that generates broadband, circularly polarized, and coherent terahertz waves. The design offers flexible manipulation of the polarization state and helicity with magnetic fields, enabling efficient generation and control of chiral terahertz waves.
Researchers from NICT demonstrated a world record 319 Tb/s long-haul transmission of wideband S, C and L-bands signal using 552 PDM-16QAM channels in a 4-core optical fiber. The system enabled transmission distance over 3,001 km with both erbium and thulium doped-fiber amplifiers and distributed Raman amplification.
Millimeter wave technology offers significant promise for improving wireless network speed and reliability. Researchers are developing machine learning-based schemes to advance the technology, addressing challenges such as channel estimation and blocking from obstacles.
Researchers have developed a new communication design that improves broadband wireless connectivity in the terahertz band, mitigating signal delay and achieving multi-Gbps speeds over short distances. The design uses multiple antennas and beamforming techniques to compensate for propagation losses and accurately estimate channels.
Researchers have developed a new multiplexer made from pure silicon for terahertz-range communications, enabling ultra-broadband wireless communications. The device can support aggregate data rates of up to 48 Gbit/s, paving the way for applications in 6G and beyond.
A new technique called time-extended ΦOTDR (TE-OTDR) allows for strain and/or temperature sensing with resolutions on the cm scale over up to 1 km range, enabling cost-effective DOFS in short-range and high-resolution applications.
Researchers have developed a semiconductor nanogroove enhanced millimeter and terahertz wave detector, achieving a noise equivalent power 2-3 orders superior to state-of-the-art detectors. The device operates at room temperature with fast response speed and broad spectral band detection.
Researchers at Purdue University have addressed an issue that was barring the development of quantum networks. By deploying a programmable switch, they can adjust how much data goes to each user by selecting and redirecting wavelengths of light carrying different data channels. This allows for the increase in users without adding to ph...
Researchers discovered that Neandertals possessed the ability to perceive and produce human speech, with similar auditory capacities as modern humans. The study found that Neandertal ear structures were 'tuned' to hear frequencies within the range of modern human speech sounds.
Researchers demonstrated the world's first transmission exceeding 1 petabit per second in a single-core multi-mode optical fiber, increasing the current record data rate by more than 2.5 times. This achievement showcases the potential of single-core multimode fibers for high-capacity transmission using standard manufacturing processes.
Cornell researchers received an NSF grant to design a new class of radio devices that can operate across a large portion of the electromagnetic spectrum while suppressing interferences. The team's approach uses adaptive filtering to reject any interference, allowing for efficient use of wireless frequencies.
A novel vertical-cavity surface-emitting laser design has been developed, combining multiple transverse coupled cavities to enhance optical feedback. This innovation extends the temporal bandwidth of VCSELs, enabling a modulation bandwidth of up to 100 GHz, beyond the known limit of relaxation oscillation frequency.
Researchers at NICT have developed a new superconducting hot electron bolometer mixer (HEBM) using magnetic materials, achieving low noise performance of about 570 K and wide IF bandwidth of 6.9 GHz at 2 THz frequency range.
Researchers developed a novel design approach for a miniature, low-frequency antenna that improves upon limitations of conventional antennas. The new antenna enables robust networking among compact, mobile robots in complex environments with more than threefold bandwidth enhancement.
A North Carolina State University study found that the number of robocalls isn't increasing, and answering a robocall has no effect on receiving additional calls. The researchers also identified and tracked thousands of robocall campaigns using audio analysis.
The project aims to address system impediments to pervasive 360-degree video sharing by improving efficiency at each stage. Researchers will explore approaches for generating high-quality frames, adapting content to available bandwidth, and optimizing projection efficiency.
A University of Houston engineer is developing a system capable of supporting 5G infrastructure, enabling faster speeds and greater bandwidth. The $1.7 million grant-funded project aims to improve radio frequency communication capacity and advance power electronics to support the demands of 5G networks.
Researchers developed a novel receiver scheme for detecting complex-valued double sideband signals with field recovery, called carrier-assisted differential detection (CADD). CADD doubles the electrical spectral efficiency compared to conventional carrier-less differential detection, and is insensitive to chromatic dispersion.
A new metasurface design enables high-directional beam forming in a wide band, with sidelobe levels below -10dB. The proposed design breaks the current bandwidth limit in transmission-type coding metasurfaces, indicating potential applications in radar and wireless communication systems.
Researchers from Tongji University and The Hong Kong Polytechnic University developed a compact broadband acoustic absorber using imperfect components with low absorption peaks. By modulating the coherent coupling effect, they achieved quasi-perfect absorption across a broad frequency range (870 - 3224 Hz) with an average coefficient o...
Researchers have created a new device that can rapidly switch functionality to support high-speed wireless communications, enabling multiple conversations over the same network. The device uses microcapillaries filled with plasma, metal or dielectric gas to generate multiple channels operating simultaneously at different frequencies.
The AF-369 VHF/UHF terrestrial antenna increases useable bandwidth by 80%, providing accurate direction finding across a wide frequency range. This innovation reduces the overall cost and complexity of monitoring systems, enabling critical spatial awareness for intelligence analysts.
A team led by Keren Bergman is developing on-chip integrated photonic devices for interconnects that consume 100 times less energy than today's communication systems while delivering 100 times more communication bandwidths between computing nodes. The project aims to break the boundaries on available communications capabilities of comp...
A three-year grant of 1.2 million rubles will support PhD candidate Angelina Markina's work on efficient algorithms for microstrip antenna design. The project aims to develop mathematical models and prototypes for various frequencies, enabling multi-bandwidth applications including 5G.
Researchers developed a 'risk-aware' mathematical model inspired by financial risk theories to improve cloud-computing networks. The model allocates traffic through optimal paths to minimize loss and maximize usage, reducing waste of energy and resources.
Researchers at SLAC National Accelerator Laboratory have developed a novel compact antenna that can enable mobile communication in situations where conventional radios fail. The device emits low-frequency radiation with wavelengths of tens to hundreds of miles, allowing it to penetrate environments that block radio waves.
A new Tel Aviv University study demonstrates improved radar detection using low-bandwidth technology, with applications in the automotive industry and beyond. The research, published in Nature Communications, uses a partially coherent approach to achieve high-range resolution without broadband signals.
Researchers found that interactive features on websites can discourage some users from adopting healthy behaviors, particularly among smokers with limited tech familiarity. In contrast, engaging features helped power users (nonsmokers) absorb and believe anti-smoking messages more accurately.
Researchers propose a novel technique called ExLL, which can reduce network latency and improve efficiency for 5G-based services. The new protocol is compared to Google's Biblio (BBR) and shows superior performance in reducing congestion issues.
A North Carolina State University researcher has developed technology to improve 5G data transmission rates by optimizing bandwidth partitioning. The framework, which combines hardware and software, can meet the international goal of 10 gigabits per second in peak performance areas.
Researchers at Duke University have demonstrated a photonic crystal waveguide that directs photons of light around sharp corners with virtually no losses due to backscattering. This breakthrough enables the development of efficient light-based computing systems, which could replace electronic devices and save energy.
Researchers have demonstrated a light-based system that can avoid jamming in wireless communication networks, using a neural algorithm inspired by a cave-dwelling fish. The system could enable more efficient use of limited bandwidth and reduce costs for service providers.
Researchers at North Carolina State University developed a new technology for steering light, allowing for greater efficiency and wider input angles. The new grating expands the window to 40 degrees, enabling users to have a greater field of view in immersive augmented-reality displays.
A new calculation predicts the maximum bandwidth of the universe, a fundamental limit on change speed. The study builds on satellite-based CMB measurements, aiming to reveal the fastest thing in the universe - the Big Bang.
The new optical receiver achieves an aggregate bandwidth of 160 Gb/s and features rapid power-on/off functionality, reducing energy consumption by up to 85%. This innovation is crucial for building faster and higher-performance computer systems while minimizing carbon dioxide emissions.
Researchers at ASRC have developed a new light wave-isolation method that ensures highly efficient broad bandwidth isolation without using external magnetic fields or devices. This breakthrough has potential uses in consumer communication systems, laser devices, automotive technology, and more.
Researchers at NIST have demonstrated a quantum method for detecting digitally modulated magnetic signals that can travel through building materials and water. The technology has the potential to improve communication range and accuracy in environments where GPS signals are weak or unreliable.
Researchers developed a new cache-management scheme that improves the data rate of in-package DRAM caches, reducing metadata transfer and increasing bandwidth. The 'Banshee' system adds three bits of data to each entry, enabling efficient storage and retrieval of frequently used data.
Researchers develop magnet-free non-reciprocal components on silicon chips for millimeter-wave frequencies, enabling full-duplex wireless communications, high-speed data transfer for self-driving cars and virtual reality, and transforming 5G networks.
A North Carolina State University team has developed a system that simultaneously delivers watts of power and transmits high-speed data, achieving true single-wire connections. The researchers found that their system is comparable in power transfer efficiency to similar wireless power transfer devices.
A flexible technology for streaming high-quality underwater video images has been developed by improving bandwidth to achieve better video quality. This innovation has the potential to open up new exploration and monitoring opportunities in oceans, which cover over two-thirds of our planet.
Researchers at UC Davis developed a novel, high-frequency chip capable of transmitting tens of gigabits of data per second. The chip's success marks an important step toward scalable systems for emerging applications like spectroscopy, sensing, and medical imaging.
The new sensor array-based instrument uses superconducting quantum interference to detect small amounts of energy with improved sensitivity and bandwidth. This advancement enables accurate tracking of nuclear materials, such as plutonium isotopes, and improves astronomical studies of cosmic microwave background radiation.
The US FCC's first direct-to-mobile radio spectrum auction successfully raised $19 billion, utilizing a complex AI-powered reverse auction system. This innovative approach allowed broadcasters to sell their unused airwaves, generating significant revenue while also addressing the growing demand for mobile data.
Researchers at EPFL challenge fundamental law of physics and discover asymmetric resonant and wave-guiding systems capable of storing large amounts of energy over prolonged periods while maintaining broad bandwidths. The breakthrough has implications for telecommunications, optical detection systems, and broadband energy harvesting.
Optical isolators are crucial for signal routing and protection in photonic circuits. Researchers demonstrated complete optical isolation within any dielectric waveguide using a simple approach without magnets or magnetic materials. The technique achieves ideal characteristics such as zero loss and perfect absorption, expanding on-chip...
Research found that birdsong duration and frequencies are adjusted in response to traffic noise, with songs returning to natural state after road closures. Temporary road closures can help mitigate this effect, providing birds with an opportunity to sing optimally.
Researchers at the University of Sydney have made a photonics breakthrough, achieving radio frequency signal control at sub-nanosecond time scales on a chip-scale optical device. This achievement could unlock the bandwidth bottleneck faced by wireless networks worldwide, enabling broader bandwidth instantaneously to more users.
Researchers from MIT's CSAIL develop a new system called Flowtune that allocates network bandwidth more fairly in data centers, reducing lag and improving page load speeds. In tests, Flowtune completed the slowest 1% of data requests nine to 11 times as rapidly as existing systems.
Researchers have created a multi-channel nano-optical device that dramatically increases the parallel processing speed, allowing for faster data transfer between microprocessors. The device uses disordered arrangement of nano antennas to minimize redundancy and enable independent operation, resulting in a 40-fold increase in bandwidth.
Researchers at the University at Buffalo have developed software that allows a swarm of low-cost drones to quickly map an offshore oil spill. The system uses principles from nature, such as flock dynamics, to optimize communication and data sharing among the drones, enabling them to determine the size of the spill in just nine minutes.
A new algorithm allows users from different network providers to pair up and make better use of the available wireless spectrum, reducing inefficiency in wireless technology. The 'blind' matching algorithm uses a simple learning process and converges to a stable-matching state, enabling mutually beneficial partnerships.
Researchers at Harvard John A. Paulson School of Engineering and Applied Sciences have developed the first flat lens that works across a continuous bandwidth of colors, from blue to green. This breakthrough enables new applications in imaging, spectroscopy, and sensing.
Scientists at the University of Strathclyde discovered a way to create narrowband radiation with high efficiency, challenging a fundamental understanding of electromagnetic radiation. This breakthrough has significant implications for materials science and medical treatments.
Researchers developed a spatial multiplexing technique that reshapes laser light into multiple modes, increasing data transmission capacity. The approach demonstrated in a laboratory free-space optical network showed 98% efficiency and could work in optical fibers.
Researchers are developing a crowdsourced system that allows users to contribute in helping detect and locate unauthorized radio frequency use. The system uses software-defined radio technology and smartphone apps to monitor for suspicious activity, potentially aiding authorities in combating wireless theft.
Researchers have quantified physical limitations on cloaking devices, allowing for calculation of optimal performance before designing a specific cloak. The new framework establishes boundaries on bandwidth capabilities of electromagnetic cloaks for objects of different sizes and composition.
African researchers have made a breakthrough in optical communication by demonstrating a significant increase in the amount of information that can be packed into light. The team used over 100 patterns of light, exploiting three degrees of freedom to achieve this result, which could potentially increase bandwidth by 100 times.
Researchers at NC State developed a model that expedites design of MIMO antennas, reducing calculation time from days to minutes. The model identifies efficient configurations for antenna designs, saving designers an enormous amount of time.