Articles tagged with Radio Signals
An international team of researchers has successfully characterized the earliest galaxies in the Universe, which formed only 200 million years after the Big Bang. The study found that these early galaxies were relatively small and dim, processing less than 5% of their gas into stars.
Researchers believe a black hole suddenly began devouring a nearby star, releasing energy and creating the brightest ever recorded TDE. The jet's direction may be pointing towards Earth, causing Doppler boosting, and could reveal insights into how supermassive black holes grow.
Astronomers have discovered a mysterious bright flash emanating from a relativistic jet of matter streaking out from a supermassive black hole. The signal, AT 2022cmc, is the brightest TDE ever detected and originates from a black hole that suddenly began devouring a nearby star, releasing an enormous amount of energy.
Researchers have created a more robust and accurate positioning system that surpasses GPS, particularly in urban settings. The new mobile network infrastructure achieved an accuracy of 10 centimeters, making it suitable for applications such as automated vehicles and quantum communication.
New research by Lancaster University and Bocconi University finds that Kenyan parents with access to mass media believe the risk of dying in a terrorist attack is 12 times larger than actual rates. This leads to children being kept out of schools, affecting their education and future earnings.
A research team proposes that magnetic reconnection around black holes energizes plasma, producing copious electron-positron pairs loaded into radio jets. This explanation aligns with M87 observations and predicts short-term X-ray emission when plasma is loaded.
Researchers using FAST telescope discover complex, magnetized environment around FRB 20201124A, contradicting young magnetar engine theories. The team analyzed 1863 bursts of the source, revealing irregular variations and circular polarization.
Researchers developed an in-home wireless device that monitors a patient's movement and gait speed to track Parkinson's disease progression. The device uses machine-learning algorithms to analyze over 200,000 data points collected from 50 participants, showing that it can effectively track the severity of the disease.
Researchers at MIT developed an AI model that can detect Parkinson's disease from breathing patterns, using a neural network to assess the presence and severity of the condition. The device is non-invasive and can be used in patients' homes without any bodily contact.
The Martian ionosphere's anisotropic characteristics cause dispersion of radio signals, distorting echoes and degrading image quality. A model simulating the ionospheric effect is developed to estimate Mars' subsurface without considering magnetic fields and solar activity.
Researchers developed a wireless system called Contactless Moisture Estimation (CoMEt) that estimates soil moisture in agricultural fields at multiple depths using radio signals. CoMEt can assess soil moisture without requiring in-ground sensors, making it more cost-effective and convenient for farmers.
Researchers have discovered a new millisecond pulsar in the globular cluster NGC 6397, shedding light on the apparent overabundance of isolated pulsars. The newly found pulsar, PSR J1740-5340B, has a faint radio signal and extended quiescent periods, suggesting it may be representative of a subgroup of hard-to-detect binary pulsars.
A team of astronomers has developed a novel way to observe the first stars and galaxies, detecting light through the fog of the early Universe. The Square Kilometre Array will likely make images of the earliest light, but current telescopes struggle to detect the cosmological signal through hydrogen clouds.
Researchers have detected a persistent radio signal from a far-off galaxy that repeats every 0.2 seconds in a clear periodic pattern, similar to a heartbeat. The source of the signal is unknown but may be related to a radio pulsar or magnetar, which could provide an astrophysical clock for measuring the universe's expansion.
A new robotic system, FuseBot, has been developed to efficiently retrieve buried objects in piles. The system uses radio frequency signals and computer vision to reason about the probable location and orientation of objects under the pile, enabling it to find more hidden items than a state-of-the-art robotics system in half the time.
Researchers develop a new method to detect hardware tampering by monitoring systems with radio waves. The technology can protect entire systems, not just individual components, and is suitable for both high-security applications and everyday problems.
Researchers developed IRShield, a novel system protecting privacy in wireless communication by disguising wireless channels with random IRS configurations. The solution prevents state-of-the-art human motion detection attacks, achieving high channel obfuscation and compatibility with existing wireless infrastructures.
NIST researchers have developed a new atomic radio receiver that boosts signal strength 100-fold by enclosing cesium atoms in a custom copper structure resembling headphones. The structure acts as a split-ring resonator, enhancing the incoming radio signal and enabling the detection of weaker signals.
Researchers at UC San Diego developed a new technology using WiFi sensors to help robots navigate indoors, even in poor lighting. The system accuracy rivals commercial camera and LiDAR sensors.
A new method for detecting tsunamis using existing GPS satellites has been developed by an international team of researchers. The system can issue warnings within 15 minutes of an earthquake or tsunami, and can be implemented in countries with a sparse GPS network.
The University of Missouri has received a grant to help nurses discuss COVID-19 vaccination hesitancy with their communities. The project will equip nursing students with knowledge and confidence to promote public health through effective communication strategies.
Researchers analyzed polarized properties of five repeating FRB sources using FAST and GBT, revealing systematic frequency evolution and rotation measure scattering. This unified description indicates complex environments around bursting sources, including supernova remnants or plasma near massive blackholes.
Researchers have discovered a source of fast radio bursts in the vicinity of galaxy M81, adding to the ongoing mystery surrounding these enigmatic events. The findings suggest that magnetars, highly magnetized neutron stars, may be responsible for generating FRBs, but further study is needed to fully understand this phenomenon.
Researchers at NIST developed an instrument to image acoustic waves over a wide range of frequencies with unprecedented detail. The new instrument captures these waves by relying on an optical interferometer, allowing for the creation of three-dimensional movies of microresonators' vibrational modes.
Researchers at MIT develop RFusion, a robotic system that uses data from a camera and radio frequency antenna to locate and retrieve lost items. The system relies on RFID tags and machine learning algorithms to optimize the robot's trajectory and grasp the object.
Researchers developed the first transparent fiber–millimeter-wave–fiber system in the 100-GHz band using a low-loss broadband optical modulator with direct photonic down-conversion. The system successfully demonstrated high-speed transmission of over 70 Gbit/s over a wired and wireless converged system.
Researchers at NIST developed a method using radio signals to image hidden and speeding objects, enabling real-time imaging around corners and through walls. The technique has potential applications in public safety, tracking hypersonic objects, and improving space debris detection.
Scientists at Rice University have developed a new model to detect magnetospheres in distant solar systems using nightside radio signals. This could provide valuable information about the characteristics of exoplanets, including their ability to protect themselves from solar winds.
The CHIME telescope has detected over 500 fast radio bursts, quadrupling the number of known radio bursts. The newly discovered signals reveal two distinct classes: repeaters and one-offs, which are thought to arise from separate mechanisms and astrophysical sources.
The CHIME/FRB catalogue reveals significant differences between repeater and non-repeater FRBs, with repeaters emitting more focused radio frequencies and bursting repeatedly. The discovery provides clues about the properties of FRBs and potentially offers an independent measurement of matter distribution in the Universe.
Researchers at Tohoku University have discovered a dying supermassive black hole in the Arp 187 galaxy through analyzing radio images and multi-wavelength data. The study indicates that AGN turn-off occurs within a 3000-year time scale, with the nucleus becoming over 1000 times fainter during the last 3,000 years.
Researchers at Tokyo Institute of Technology have developed a wirelessly powered relay network for 5G systems, addressing the challenges of flexible deployment. The proposed design is both economical and energy-efficient, leveraging high-capacity millimeter-wave frequencies to enhance 5G connectivity.
Researchers at Brigham Young University have developed the world's most power-efficient high-speed analog-to-digital converter (ADC) microchip, reducing power consumption by three times while increasing speed. This breakthrough technology has vast applications in fields like autonomous vehicles, smart wearables, and implantable devices.
Researchers from NUS and TU have developed a method to harness WiFi signals using spin-torque oscillators, converting them into energy to power small electronics. The device successfully harvested energy from WiFi-band signals to light up an LED wirelessly without using any battery.
The Institute of Astrofísica de Canarias is part of the DALI experiment, which aims to detect axions and paraphotons in the 6-60 GHz band. This could help explain dark matter's nature and its role in the universe.
Researchers at Penn State have developed a wearable, flexible transmitter that can send wireless data over long distances. The device uses a copper mesh with a wavy pattern to maintain its resonance frequency even when stretched or compressed.
Researchers at NIST have developed an atom-based sensor that can determine the direction of incoming radio signals, a crucial component for atomic communication systems. The sensor uses Rydberg atoms to measure phase differences and calculate signal arrival angles, offering advantages in accuracy and universality.
A NASA mission will test technologies for satellite swarms to operate autonomously in low-Earth orbit, setting the stage for thousands of small satellites working cooperatively. The V-R3x mission will deploy three CubeSats into polar orbit, exchanging radio signals and measuring distance between satellites.
Researchers have detected a possible radio signal from the exoplanet in the Tau Boötes system using the Low Frequency Array. The signal suggests that the planet's magnetic field may be contributing to its habitability by shielding its atmosphere from solar wind and cosmic rays.
Researchers at Argonne National Laboratory are upgrading a measurement system for the Muon g-2 experiment, which could reveal undiscovered particles. The upgraded system will enable precise measurements of the muon's spin precession rate and magnetic field strength.
A team of researchers used the FAST telescope to detect over 15 fast radio bursts, revealing a galaxy 3 billion light years away as the source. The bursts' polarization signals showed diverse swings, indicating production in compact star magnetospheres and disfavoring shock models.
A new project led by West Virginia University researcher Kevin Bandura aims to understand the nature of dark energy by mapping out the distribution of matter throughout the universe. The three-year project will use precise observations to study the expansion of the universe, which is currently accelerating due to dark energy.
Researchers at Princeton University developed an automated system using Doppler radar to spot oncoming traffic and pedestrians around corners. The system allows cars to see objects out of line of sight, improving automotive safety.
A new 28 GHz transceiver has been developed to support dual-polarized MIMO in 5G radio units, improving data rate and spectrum efficiency. The transceiver uses a built-in horizontal and vertical canceller to cancel cross-polarization leakage, resulting in reduced signal degradation.
Researchers at Virginia Tech propose that high-energy cosmic rays, rather than neutrinos, are responsible for the mysterious signals detected by the ANITA experiment. The team suggests that sub-surface firn, a dense layer of compacted snow, is causing the reflections.
The smartband iFeel-You detects high body temperatures and proximity to others, alerting users to respect social distancing. Researchers developed the wearable using technologies from a sensorized suit, aiming for practical solutions in industries and daily life.
Researchers at UC San Diego developed a new ultra-low power Wi-Fi radio that consumes just 28 microwatts of power, enabling IoT devices to communicate with existing Wi-Fi networks. The chip can transmit data at a rate of 2 megabits per second over a range of up to 21 meters.
Astronomers led by Penn State graduate student Sofia Sheikh conducted a massive survey of radio emissions from 20 nearby stars, looking for technological signatures of extraterrestrial civilizations. Despite finding no technosignatures, the analysis sets rigorous limits on the presence of advanced civilizations in our galaxy.
Emerging technologies are opening a new era in SETI research, with innovative approaches expanding beyond traditional radio signal searches. New systems will detect technosignatures, such as laser emissions or atmospheric chemicals, indicating the presence of extraterrestrial technologies.
Researchers at MIT have developed a low-cost, disposable smart diaper that uses RFID technology to alert caregivers when a baby is wet. The sensor detects moisture and sends a signal to a nearby receiver, which can send a notification to a smartphone or computer.
Physicists from MIPT and Russian universities have developed a parametric model to predict optimal waveguide configurations for magnonic circuits. The research reveals that spin wave interference can cause significant signal loss, leading to a breakthrough in designing efficient magnonic logic elements.
The 2019 Queen Elizabeth Prize for Engineering is awarded to four US engineers who created the first global satellite-based positioning system, GPS. The award celebrates the global benefit of engineering innovation on humanity.
Researchers analyzed data from the Murchison Widefield Array radio telescope to set a new limit for the strength of neutral hydrogen's ultra-faint signature. The analysis may reveal critical information about the first stars and galaxies in the universe.
A new power-saving chip developed by UC San Diego engineers significantly reduces the need to replace batteries in IoT devices and wearables. The wake-up receiver wakes up devices only when necessary, allowing for reduced power use and increased battery life.
Researchers propose a novel method to search for dark matter by harnessing the power of plasmas and magnetic fields. This approach, known as axion plasma haloscopes, enables the detection of dark matter in previously unexplored areas. By tuning into specific frequencies, scientists may uncover evidence of this elusive substance.
Using FRB 181112, researchers studied the diffuse gas in the halo of a massive galaxy, finding no evidence of cold turbulent clouds or small dense clumps of cool gas. The signal also revealed information about the magnetic field in the halo, which is very weak.
Astronomers have found that a distant galaxy is nestled in a serene ocean of gas, defying expectations and providing new insights into the composition of galaxy halos. The discovery was made possible by a new technique involving fast radio bursts, which allowed researchers to study the gas directly.
Astronomers analyze radio pulses from a fast radio burst to characterize the diffuse gas in a galactic halo, finding surprisingly low density and weak magnetic field. The discovery challenges previous models and provides new insights into ejection processes and galaxy evolution.
Scientists at University of Illinois replicate Hall Effect with photons, enhancing one-way radio transmission and absorbing opposing signals. The technique could protect sources from interference and ensure accurate quantum measurements.
The NIST team used cesium atoms to receive digital bits in phase shifting format, receiving up to 5 megabits of data per second. The atom-based system showed decent accuracy with an error vector magnitude (EVM) below 10 percent.