Results 31 to 40 of about 281,646 (345)
Radar detection and speed estimation of high‐speed targets using phase‐modulated waveforms
Electronics Letters, 2023 Specifying parameters of high‐speed targets as range and velocity in radar systems operating with phase‐modulated signals is a problematic process because of the serious effect of high Doppler frequency on these types of waveforms.
Alaa G. Zahra +3 more
doaj +1 more source
Journal of Marine Science and Engineering, 2021 Velocity is vital information for navigation and oceanic engineering. Coherent Doppler sonar is an accurate tool for velocity measurement, but its use is limited due to velocity ambiguity.
Peng Liu, Nobuyoshi Kouguchi, Ying Li
doaj +1 more source
Observation of sub-Doppler absorption in the /Lambda-type three-level Doppler-broadened cesium system [PDF]
, 2003 Thanks to the atomic coherence in coupling laser driven atomic system, sub-Doppler absorption has been observed in Doppler-broadened cesium vapor cell via the /Lambda-type three-level scheme.
Liu, Tao +4 more
core +1 more source
Algorithm for frequency capture and rectification in a low-orbit satellite IoT communication network
Mathematical Biosciences and Engineering, 2021 In satellite communication systems, due to relative motion between satellites and that between satellites and the ground, the resulting Doppler frequency offset adversely affects communication synchronization.
Jie Shen +3 more
doaj +1 more source
Frequency-domain waveform approximants capturing Doppler shifts [PDF]
, 2018 Gravitational wave astrophysics has only just begun, and as current detectors are upgraded and new detectors are built, many new, albeit faint, features in the signals will become accessible.
Chamberlain, Katie +3 more
core +4 more sources
IEEE Photonics Journal, 2023 In this article, the wavelength division multiplexing (WDM) technology is applied to the space chaotic laser communication system. We deduce the bit error rate (BER) model of multi-channel space chaotic laser communication with Doppler frequency shift ...
Mi Li +5 more
doaj +1 more source
New Satellite Automatic Tracking by Doppler [PDF]
فصلنامه علوم و فناوری فضایی, 2015 In this paper a new method for satellite authomatic tracking presented by earth station via doppler frequency . This method done by calculating time diviation through difference between real dopper frequency by communication equipment and software ...
M. Nasirian, S. ghaemi Sardroodi
doaj
Cable force measurement system design and experiment based on heterodyne laser Doppler vibrometer
Dianzi Jishu Yingyong, 2020 Cable force of bridge cable is an important standard to measure the safety of bridge. According to the working principle of laser Doppler vibration measurement, a small and high-precision laser Doppler vibration measurement system is designed and applied
Li Dongming +5 more
doaj +1 more source
Blazar sequence - an artefact of Doppler boosting
, 2008 The blazar sequence is a scenario in which the bolometric luminosity of the blazar governs the appearance of its spectral energy distribution. The most prominent result is the significant negative correlation between the synchrotron peak frequencies and ...
Antón +34 more
core +1 more source
Laser Doppler holographic microscopy in transmission: application to fish embryo imaging [PDF]
, 2014 We have extended Laser Doppler holographic microscopy to transmission geometry. The technique is validated with living fish embryos imaged by a modified upright bio-microcope.
Alexandre, Daniel +2 more
core +3 more sources