Results 291 to 300 of about 5,337,605 (357)
Optics Express, 2007 The performance of coherent pulse detection (CPD) and multichannel coherent detection (MCCD) based on a single dual-balanced homodyne receiver was experimentally demonstrated using a grating-coupled hybridly mode-locked semiconductor laser. Compared with
Wangkuen Lee, Ron Menendez
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200 Gbit/s/λ PDM-PAM-4 PON system based on intensity modulation and coherent detection
IEEE\/OSA Journal of Optical Communications and Networking, 2019A low-complexity and cost-efficient coherent detection-based 100 Gb/s or beyond passive optical network (PON) has attracted a lot of attention in recent years, as this technology offers high receiver sensitivity, colorless frequency selectivity, and ...
Jiao Zhang +9 more
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Generalized coherence (signal detection)
ICASSP-88., International Conference on Acoustics, Speech, and Signal Processing, 2003The authors introduce a test for detecting the presence of a common signal on M noisy channels that generalizes a popular technique using the magnitude-squared coherence (MSC) estimate for detecting a common signal on two channels. The basis of this test is the generalized coherence estimate, a statistic involving the normalized M*M Gram matrix ...
Herbert Gish, Douglas Cochran
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IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2019
Radar detection of maneuvering targets with high velocity and acceleration often results in severely deteriorative performance or even failure. Parameter-search approaches are commonly used to overcome such difficulty, but the substantial computational ...
Cunsuo Pang, Shengheng Liu, Yan Han
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Radar detection of maneuvering targets with high velocity and acceleration often results in severely deteriorative performance or even failure. Parameter-search approaches are commonly used to overcome such difficulty, but the substantial computational ...
Cunsuo Pang, Shengheng Liu, Yan Han
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Coherent detection of partially coherent sources
Optics Letters, 1980The mean square of the beating component of the photodetector output current of a coherent optical or infrared receiver, illuminated by partially coherent quasi-monochromatic radiation, is expressed in terms of the mutual intensity functions of the signal and local reference fields on the detector’s active surface.
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Improved Coherent Detection of GMSK
IEEE Transactions on Communications, 1984It is pointed out that the degradation effect due to premodulation filtering in GMSK (Gaussian-filtered minimum shift keying) is largest at the edges of time slots, which instant has been adopted as the sample timing in the conventional coherent detector of GMSK. Then a new coherent detector employing signals sampled at a different timing in a deviated-
Mitsuru Ishizuka, Yasuhiko Yasuda
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Conditions for the detection of coherent motion
Vision Research, 1991Previous studies have suggested that human motion perception involves at least two different detection stages: an orientation selective or component motion stage and a combination stage where selectivity to the coherent motion of a pattern, e.g. a plaid is established. These studies are inconclusive as to the motion detection process per se.
A V, van den Berg, W A, van de Grind
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IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2018
High-speed target often suffers from the range walk (RW) problem within the process of long-time coherent integration (CI). The aim of this paper is to present a new coherent detection algorithm, i.e., modified location rotation transform (MLRT), which ...
Zhi Sun +4 more
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High-speed target often suffers from the range walk (RW) problem within the process of long-time coherent integration (CI). The aim of this paper is to present a new coherent detection algorithm, i.e., modified location rotation transform (MLRT), which ...
Zhi Sun +4 more
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Coherent Detection Signal-to-Noise
Applied Optics, 1975General equations are derived for the signal-to-noise ratio of a coherent (heterodyne) receiver in terms of the distribution functions of the signal and local oscillator fields and the size and shape of the detector. The optimum local oscillator field distribution is identical to the signal field distribution over the detector surface. The special case
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Multiresolution detection of coherent radar targets
IEEE Transactions on Image Processing, 1997We develop and investigate several novel multiresolution algorithms for detecting coherent radar targets embedded in clutter. These multiresolution detectors exploit the fact that prominent target scatterers interfere in a characteristic manner as resolution is changed, while multiresolution clutter signatures are random. We show, both on simulated and
Nikola S. Subotic +3 more
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