Results 21 to 30 of about 522,881 (264)
Comparison of Three-Phase Modulation with Two-Phase and Four-Phase Modulation [PDF]
IEEE Transactions on Communications, 1980 For a constant added noise density at high signal-to-noise ratios and for the same error rate, three-phase PSK requires about 0.75 dB less energy per bit than two-phase or four-phase PSK. However, at very low signal-to-noise ratios, three-phase PSK requires about 0.74 dB more energy per bit of channel capacity than two-phase or four-phase PSK.
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Design and generation of structured array beams with shape-invariant properties
New Journal of Physics, 2023 We theoretically propose and experimentally demonstrate a flexible approach to generate an arbitrary shape-invariant structured array beam during propagation with the prescribed intensity distribution.
Yuqiu Zhang +7 more
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Phase Modulation of Retro-Reflected Radar Echo Signal Using a Microstrip Van-Atta Array
IEEE Access, 2019 Van-atta array is able to retro-reflect the incident signal back to the income direction and, thus, it can maintain a relatively larger radar cross-section (RCS) in a large range of incidence angles.
Kunpeng Song +4 more
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Continuous Phase-Modulated Halftones [PDF]
IEEE Transactions on Image Processing, 2009 A generalization of periodic clustered-dot halftones is proposed, wherein the phase of the halftone spots is modulated using a secondary signal. The process is accomplished by using an analytic halftone threshold function that allows halftones to be generated with controlled phase variation in different regions of the printed page.
Basak Oztan, Gaurav Sharma 0001
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A New Method for Total Fat Detection in Raw Milk Based on Dual Low-Coherence Interferometer
Sensors, 2019 The present work experimentally demonstrates a multimode fiber optic sensing setup for total fat detection in raw milk samples. The optical fiber arrangement incorporates a low-coherence Fabry−Perot cavity operating in dual response.
Abraham Gastélum-Barrios +4 more
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IEEE Photonics Journal, 2013 A noise reduction method of Fresnel computer-generated hologram (CGH) using wavelet transform and smooth filter is presented. Noise in hologram is very difficult to remove because an interference pattern is recorded on a digital camera during the digital
Le Thanh Bang +4 more
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EVALUATION METHOD FOR PARASITIC EFFECTS OF THE ELECTRO-OPTICAL MODULATOR IN A FIBER OPTIC GYROSCOPE [PDF]
Научно-технический вестник информационных технологий, механики и оптики, 2016 Subject of Research.The paper proposes an original method for studying the parasitic effects in the electro-optic modulator of the fiber optic gyroscope. Proposed method is based on the usage of a special waveform phase modulation signal. Method.
S. A. Volkovskiy +4 more
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Single-Shot Compressed Imaging via Random Phase Modulation
Applied Sciences, 2022 Compressed sensing (CS) provides an innovative framework for signal sampling, which enables accurate recovery of the sparse or compressible signal from a small set of linear measurements far fewer than the Nyquist rate in traditional signal processing ...
Cheng Zhang +5 more
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Measuring the Reflection Matrix of a Rough Surface
Applied Sciences, 2017 Phase modulation methods for imaging around corners with reflectively scattered light required illumination of the occluded scene with a light source either in the scene or with direct line of sight to the scene. The RM (reflection matrix) allows control
Kenneth Burgi +3 more
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Applied Sciences, 2016 Phase front modulation was previously used to refocus light after transmission through scattering media. This process has been adapted here to work in reflection.
Kenneth Burgi +3 more
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