Results 31 to 40 of about 1,684,562 (352)
Applied Sciences, 2018 Digital holography is a well-established technology for optical quality control in industrial applications. Two common challenges in digital holographic measurement tasks are the ambiguity at phase steps and the limited depth of focus.
Tobias Seyler +5 more
doaj +1 more source
A Comprehensive Experimental Emulation for OTFS Waveform RF-Impairments
Sensors, 2022 The orthogonal time-frequency space (OTFS) waveform exceeds the challenges that face orthogonal frequency division multiplexing (OFDM) in a high-mobility environment with high time-frequency dispersive channels.
Abdelrahman Abushattal +3 more
doaj +1 more source
Passive Phase Noise Cancellation Scheme [PDF]
Physical Review Letters, 2012 We introduce a new method for reducing phase noise in oscillators, thereby improving their frequency precision. The noise reduction is realized by a passive device consisting of a pair of coupled nonlinear resonating elements that are driven parametrically by the output of a conventional oscillator at a frequency close to the sum of the linear mode ...
Kenig, Eyal +6 more
openaire +3 more sources
Influence of phase noise and interchannel interference on the performance of optical heterodyne FSK receiver [PDF]
Serbian Journal of Electrical Engineering, 2003 The moments approach is generally considered a systematic way to perform the analysis of coherent optical systems. Exact moments of the filtered signal corrupted by phase noise enable the construction of the Gaussian quadrature rule, which may be used to
Stefanović Mihajlo, Milić D.
doaj +1 more source
PHASE AND FREQUENCY NOISE METROLOGY [PDF]
Frequency Standards and Metrology, 2009 As a consequence of a general trend in the physics of oscillators and clocks towards optics, phase and frequency metrology is rapidly moving to optics too. Yet, optics is not replacing the traditional radio-frequency (RF) and microwave domains. Instead, it adds tough challenges.
Rubiola, Enrico +3 more
openaire +2 more sources
Pilot-aided carrier synchronization using an approximate DCT-based phase noise model [PDF]
, 2007 This contribution deals with phase noise estimation from pilot symbols. The phase noise process is approximated by an expansion of DCT basis functions containing only a few terms.
Bhatti, Jabran, Moeneclaey, Marc
core +2 more sources
On Phase Noise Suppression in Full-Duplex Systems [PDF]
, 2014 Oscillator phase noise has been shown to be one of the main performance limiting factors in full-duplex systems. In this paper, we consider the problem of self-interference cancellation with phase noise suppression in full-duplex systems. The feasibility
Ahmed, Elsayed, Eltawil, Ahmed M.
core +1 more source
Whole system radar modelling: Simulation and validation
IET Radar, Sonar & Navigation, 2023 The ever‐expanding horizon of radar applications demands solutions with high‐end radar functionalities and technologies and is often limited by the available radar equipment, cost and time.
Jithin Kannanthara +9 more
doaj +1 more source
Performance of DPSK Signals with Quadratic Phase Noise
, 2004 Nonlinear phase noise induced by the interaction of fiber Kerr effect and amplifier noises is a quadratic function of the electric field. When the dependence between the additive Gaussian noise and the quadratic phase noise is taking into account, the ...
Ho, Keang-Po
core +2 more sources
Oscillator Phase Noise and Small-Scale Channel Fading in Higher Frequency Bands [PDF]
, 2014 This paper investigates the effect of oscillator phase noise and channel variations due to fading on the performance of communication systems at frequency bands higher than 10GHz.
Eriksson, Thomas +3 more
core +2 more sources