Results 21 to 30 of about 451,753 (296)
On blind searches for noise dominated signals: a loosely coherent approach [PDF]
, 2010 We introduce a ‘loosely coherent’ method for detection of continuous gravitational waves that bridges the gap between semi-coherent and purely coherent methods.
Dergachev, V.
core +1 more source
Optical phase synchronization in coherent optical beamformers for phased array receive antennas [PDF]
, 2009 An optical phase synchronization system using a power feedback loop technique is experimentally demonstrated. The system allows coherent combining of signals modulated on the same optical carrier in a hybrid optical beam forming system ...
Burla, M. +7 more
core +3 more sources
Irregular Oscillatory-Patterns in the Early-Time Region of Coherent Phonon Generation in Silicon [PDF]
, 2017 Coherent phonon (CP) generation in an undoped Si crystal is theoretically investigated to shed light on unexplored quantum-mechanical effects in the early-time region immediately after the irradiation of ultrashort laser pulse.
Hase Muneaki +6 more
core +2 more sources
Coherence of early motion signals
Vision Research, 2001 Oscillation thresholds were evaluated for detecting motion and discriminating relative motion. Three horizontally aligned Gaussian blobs oscillated horizontally, with the center in-phase or out-of-phase with the two flankers. Motion thresholds were well below those for static bisection, and involved small contrast changes (
Lappin, Joseph S +2 more
openaire +2 more sources
Error-bound formulation for multichannel reception of M-DPSK and pilot-aided M-PSK over Rayleigh-fading channels with postdetection combining [PDF]
, 2004 Upper bounds for symbol-error probability are developed for multichannel reception of M-ary phase-shift keying (M-PSK) over frequency-flat Rayleigh-fading channels.
Chow, YC, McGeehan, JP
core +2 more sources
Sensors, 2013 A unitary transformation-based algorithm is proposed for two-dimensional (2-D) direction-of-arrival (DOA) estimation of coherent signals. The problem is solved by reorganizing the covariance matrix into a block Hankel one for decorrelation first and then
Chengpeng Hao +3 more
doaj +1 more source
Theoretical performance comparison between reference-based coherent BPSK and BCH coded differential BPSK [PDF]
, 1992 Both channel sounding and channel coding are well-known techniques for improving bit error rate (BER) performance of data transmission over a narrowband mobile radio channel.
Bateman, A, Li, M, McGeehan, JP
core +2 more sources
Entropy, 2023 Direction of arrival (DOA) estimation is an important research topic in array signal processing and widely applied in practical engineering. However, when signal sources are highly correlated or coherent, conventional subspace-based DOA estimation ...
Jiang’an Dai +4 more
doaj +1 more source
Loosely coherent searches for sets of well-modeled signals [PDF]
, 2011 We introduce a high-performance implementation of a loosely coherent statistic sensitive to signals spanning a finite-dimensional manifold in parameter space.
B. F. Schutz, V. Dergachev
core +2 more sources
Frontiers in Physics, 2020 Due to the limitation of analog-to-digital/digital-to-analog converters, photonics-assisted channelized receivers are thought to be a promising approach to receiving wideband microwave signals.
Huan Huang +8 more
doaj +1 more source