Dual-Frequency Signal Enhancement Method of Moving Target Echoes for GNSS-S Radar
Remote Sensing, 2023 The GNSS-S radar utilizes the signals of a global navigation satellite system (GNSS) to carry out target detection. Due to the very low power of GNSS signals, long-term accumulation is needed to improve the gain of the echo signals.
Wenning Gao +6 more
doaj +1 more source
Observation of the quantum paradox of separation of a single photon from one of its properties [PDF]
, 2016 We report an experimental realization of the quantum paradox of the separation of a single photon from one of its properties (the so-called "quantum Cheshire cat"). We use a modified Sagnac interferometer with displaced paths to produce appropriately pre-
Ashby, James M. +2 more
core +3 more sources
Improvements on SCORE, Especially for Weak Signals [PDF]
Sankhya A, 2021 A network may have weak signals and severe degree heterogeneity, and may be very sparse in one occurrence but very dense in another. SCORE (Jin, 2015) is a recent approach to network community detection. It accommodates severe degree heterogeneity and is adaptive to different levels of sparsity, but its performance for networks with weak signals is ...
Jin, Jiashun +2 more
openaire +2 more sources
Stochastic resonance with weak monochromatic driving: gains above unity induced by high-frequency signals [PDF]
, 2007 We study the effects of a high-frequency (HF) signal on the response of a noisy bistable system to a low-frequency subthreshold sinusoidal signal.
Borromeo M. +3 more
core +2 more sources
Cosmogenic neutrinos and quasi-stable supersymmetric particle production [PDF]
, 2007 We study the signal for the detection of quasi-stable supersymmetric particles produced in interactions of cosmogenic neutrinos. We consider energy loss of high energy staus due to photonuclear and weak interactions.
I. Sarcevic +5 more
core +1 more source
IEEE Access, 2021 For weak signal detection with known frequency, based on the double coupling Duffing oscillator method, a differential double coupling Duffing oscillator and Van der Pol-Duffing oscillator detection method is proposed.
Guohui Li, Jiuyang Cui, Hong Yang
doaj +1 more source
Experimental investigation of the performance of different modulation techniques under controlled FSO turbulence channel [PDF]
, 2011 This paper experimentally investigates and compares the performance of the free space optics system employing three different modulation schemes, on-off keying (OOK) with nonreturn- to-zero (NRZ) and return-to-zero (RZ) and the binary phase shift keying (
Adebanjo, Olusegun +5 more
core +1 more source
Grouping FFT Based Two-Stage High Sensitivity Signal Acquisition With Sign Transitions
IEEE Access, 2018 The acquisition performance of weak global navigation satellite system signals, especially those with secondary codes, is susceptible to sign transitions. To better understand and overcome the negative impact of sign transitions, this paper derived a new
Aimeng Liu +3 more
doaj +1 more source
Subaru weak-lensing measurement of a z = 0.81 cluster discovered by the Atacama Cosmology Telescope Survey [PDF]
, 2012 We present a Subaru weak lensing measurement of ACT-CL J0022.2-0036, one of the most luminous, high-redshift (z=0.81) Sunyaev-Zel'dovich (SZ) clusters discovered in the 268 deg^2 equatorial region survey of the Atacama Cosmology Telescope.
Adam D. Hincks +28 more
core +3 more sources
Design and Performance Evaluation of a Dual Antenna Joint Carrier Tracking Loop
Sensors, 2015 In order to track the carrier phases of Global Navigation Satellite Systems (GNSS) signals in signal degraded environments, a dual antenna joint carrier tracking loop is proposed and evaluated.
Wenfei Guo +4 more
doaj +1 more source