Results 71 to 80 of about 7,545,238 (204)

Detection theory as application to the radar with a self-oscillating feedback

Известия высших учебных заведений России: Радиоэлектроника, 2015
The physical and mathematical models of radar with feedback through space and target, operating on the principle of self-oscillating system are discussed. The linear mode of fluctuations establishing is analyzed.
V. M. Kutuzov, V. N. Popov
doaj  

Terahertz Multicolor Imaging of Opaque Objects Using Self-Mixing Interferometry with Quantum-Cascade Lasers

Photonics
Self-mixing interference in a terahertz quantum-cascade laser has been demonstrated to be suitable for the detection of weak signals scattered or reflected by the target.
Jiaxuan Cai, Yan Xie, Yingxin Wang, Meng Chen, Lianhe Li, Mohammed Salih, Edmund H. Linfield, Ning Yang, Weidong Chu, Peng Bai, Ziran Zhao   +10 more
doaj   +1 more source

Simple Self-Homodyne Detection Scheme for Optical OFDM With Inserted Pilot Subframes and Application in Optical Access Networks

IEEE Access, 2017
In this paper, a simple self-homodyne detection scheme is proposed and experimentally demonstrated for applications in optical access networks. Unmodulated pilot subframes are periodically inserted and interleaved with data subframes to form an ...
Guo-Wei Lu, Xun Guan, Takahide Sakamoto, Naokatsu Yamamoto, Calvin Chun-Kit Chan   +4 more
doaj   +1 more source

A photonic analog-to-digital converter using phase modulation and self-coherent detection with spatial oversampling

Optics Express, 2014
We propose a new type of photonic analog-to-digital converter (ADC), designed for high-resolution (>7 bit) and high sampling rates (scalable to tens of GS/s). It is based on encoding the input analog voltage signal onto the phase of an optical pulse stream originating from a mode-locked laser, and uses spatial oversampling as a means to improve the ...
Ori, Golani, Luca, Mauri, Fabiano, Pasinato, Cristian, Cattaneo, Guido, Consonnni, Stefano, Balsamo, Dan M, Marom   +6 more
openaire   +2 more sources

Coherent optical binary polarisation shift keying heterodyne system in the free-space optical turbulence channel [PDF]

, 2011
In this paper, analytical and simulation results for the bit error rate (BER) performance and fading penalty of a coherent optical binary polarization shift keying (2PolSK) heterodyne system adopted for a free space optical (FSO) communication link ...
Z. Ghassemlooy, Tang, Xuan, S. Rajbhandari, Lee , Chung Ghiu, Ghassemlooy, Zabih, Popoola, Wasiu Oyewole, W.O. Popoola, C.G. Lee, Popoola, Wasiu O., Rajbhandari, Sujan, Lee, Chung Ghiu, X. Tang, Ghassemlooy , Zabih   +12 more
core   +1 more source

Waveform Self-Referencing Algorithm for Low-Repetition-Rate Laser Coherent Combination

Applied Sciences
Indirect detection phase control algorithms, such as the dithering algorithm and the stochastic parallel gradient descent algorithm (SPGD), have simple system structures and are applicable to filled-aperture coherent combinations with high efficiency ...
Zhuoyi Yang, Haitao Zhang, Dongxian Geng, Yixuan Huang, Jinwen Zhang   +4 more
doaj   +1 more source

A comparison of self-reported analgesic use and detection of urinary ibuprofen and acetaminophen metabolites by means of metabonomics (The INTERMAP Study) [PDF]

, 2012
Information on dietary supplements, medications, and other xenobiotics in epidemiologic surveys is usually obtained from questionnaires and is subject to recall and reporting biases.
Holmes, Elaine, Elliott, Paul, Nicholson, J.K., Stamler, Jeremiah, Nicholson, Jeremy K., Elliott, P., Loo, Ruey Leng, Robertson, C.E., Holmes, E., Chan, Queenie, Stamler, J., Brown, Ian J., Brown, I.J., Loo, R.L., Chan, Q., Robertson, Claire E.   +15 more
core   +1 more source

Non-coherent and Differentially Coherent code acquisition in MIMO assisted DS-CDMA multi-path downlink scenarios

, 2008
In this contribution we investigate both Differentially Coherent (DC) and Non-Coherent (NC) code acquisition schemes in the Multiple Input Multiple Output (MIMO)-aided Direct Sequence-Code Division Multiple Access (DS-CDMA) downlink, when communicating ...
Won, S, Hanzo, L.
core   +1 more source

Self-care readiness index [PDF]

, 2021
Global Self-Care Federation, 2021
core   +1 more source

Measurement of Stokes-operator squeezing for continuous-variable orbital angular momentum

Scientific Reports, 2017
We demonstrate experimentally a measurement scheme for the Stokes operators for the continuous-variable squeezed states of orbital angular momentum (OAM).
Jun Guo, Chunxiao Cai, Long Ma, Kui Liu, Hengxin Sun, Jiangrui Gao   +5 more
doaj   +1 more source