Results 101 to 110 of about 1,165,505 (404)
Fundamental Radar Properties: Hidden Variables in Spacetime [PDF]
, 2001 A derivation of the properties of pulsed radiative imaging systems is presented with examples drawn from conventional, synthetic aperture, and interferometric radar.
Altes +5 more
core +2 more sources
Optoelectronic Devices for In‐Sensor Computing
Advanced Materials, EarlyView.The raw data obtained directly from sensors in the noisy analogue domain is often unstructured, which lacks a predefined format or organization and does not conform to a specific data model. Optoelectronic devices for in‐sensor visual processing can integrate perception, memory, and processing functions in the same physical units, which can compress ...
Qinqi Ren +7 more
wiley +1 more source
Passive Radar at the Roadside Unit to Configure Millimeter Wave Vehicle-to-Infrastructure Links [PDF]
arXiv, 2019 Millimeter wave (mmWave) vehicular channels are highly dynamic, and the communication link needs to be reconfigured frequently. In this work, we propose to use a passive radar receiver at the roadside unit to reduce the training overhead of establishing an mmWave communication link.
arxiv
Investigations of the lower and middle atmosphere at the Arecibo Observatory and a description of the new VHF radar project [PDF]
, 1986 The atmospheric science research at the Arecibo Observatory is performed by means of (active) radar methods and (passive) optical methods. The active methods utilize the 430 NHz radar, the S-band radar on 2380 MHz, and a recently constructed Very High ...
Hagen, J. +3 more
core +1 more source
Overlapped-MIMO Radar Waveform Design for Coexistence With Communication Systems
, 2015 This paper explores an overlapped-multiple-input multiple-output (MIMO) antenna architecture and a spectrum sharing algorithm via null space projection (NSP) for radar-communications coexistence. In the overlapped-MIMO architecture, the transmit array of
Abdelhadi, Ahmed +2 more
core +1 more source
Colored Radiative Cooling: from Photonic Approaches to Fluorescent Colors and Beyond
Advanced Materials, EarlyView.Colored radiative cooling (CRC) has become a prevailing technology for achieving colorful appearance and simultaneously enhancing the effective solar reflectance of cooling coatings. This review presents recent advancements in CRC and its profound impact on energy savings in real‐world applications.
Tao Wang +5 more
wiley +1 more source
MIMO radar techniques: two-stage constant false alarm rate detection for fast-fluctuating targets
The Journal of Engineering, 2019 Here, the authors analyse a two-step constant false alarm rate (CFAR) detection problem in distributed sensor system (e.g. statistical multiple-input multiple-output (MIMO) radar) for fast-fluctuating targets (TS-AMF-II).
Zhihua Li +3 more
doaj +1 more source
Remote Monitoring of Human Vital Signs Using mm-Wave FMCW Radar
IEEE Access, 2019 Electromagnetic radars have been shown potentially to be used for remote sensing of biosignals in a more comfortable and easier way than wearable and contact devices.
M. Alizadeh +4 more
semanticscholar +1 more source
Advanced Materials, EarlyView.Nature‐inspired, photolithography‐free, flexible, pixelated perovskite photosensitive films serve not only as a high‐resolution pixelation platform but also as a stress‐relief mechanism for otherwise brittle perovskite films, enabling enhanced mechanical flexibility. This synergetic approach yields pixelated perovskite layers with ≈1.5 µm pixel sizes, ≈
Ding Zheng +17 more
wiley +1 more source
A Low-Complexity FMCW Surveillance Radar Algorithm Using Two Random Beat Signals
Sensors, 2019 This paper proposes a low-complexity frequency-modulated continuous wave (FMCW) surveillance radar algorithm using random dual chirps in order to overcome the blind-speed problem and reduce the computational complexity.
Bong-seok Kim +3 more
doaj +1 more source