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A Novel Demodulation Scheme of MSK Signals Based on One-Dimensional Convolutional Neural Network under Impulsive Noise.
Publication Type: Academic Journal
Source(s): Electronics (2079-9292). Nov2023, Vol. 12 Issue 21, p4520. 14p.
Abstract: The atmospheric noise widely present in very-low-frequency and low-frequency (VLF/LF) communication systems is usually considered as a type of impulsive noise, which can degrade the performance of signal processing methods based on Gaussian noise. To s...
Temperature Demodulation for an Interferometric Fiber-Optic Sensor Based on Artificial Bee Colony–Long Short-Term Memory.
Publication Type: Academic Journal
Source(s): Photonics. Oct2023, Vol. 10 Issue 10, p1157. 13p.
Abstract: Demodulation methods play a critical role in achieving high-performance interferometric fiber-optic temperature sensors. However, the conventional passive 3 × 3 coupler demodulation method overlooks certain issues, such as the non-1:1:1 splitting ratio...
Five-Step Phase-Shift-Based Multiwavelength Averaging for Extrinsic Fabry–Perot Interferometric Sensors.
Publication Type: Academic Journal
Source(s): Photonics. Oct2023, Vol. 10 Issue 10, p1076. 15p.
Abstract: In order to address issues such as low demodulation accuracy, large demodulation errors, small dynamic range, and complex algorithms for the extrinsic Fabry–Perot interferometric (EFPI) sensor, a five-step phase-shift algorithm based on a multiwaveleng...
Design of High-Precision Parallel AWG Demodulation System.
Publication Type: Academic Journal
Source(s): Micromachines. Sep2023, Vol. 14 Issue 9, p1662. 10p.
Abstract: Here, we present a high-precision demodulation method that supports the arrayed waveguide grating (AWG) system, which includes a 1 × 8 AWG as the primary filter with a 0.5 nm channel spacing and a 1 × 4 AWG as the auxiliary filter with a 1 nm channel s...
Weak Capacitance Detection Circuit of Micro-Hemispherical Gyroscope Based on Common-Mode Feedback Fusion Modulation and Demodulation.
Publication Type: Academic Journal
Source(s): Micromachines. Jun2023, Vol. 14 Issue 6, p1161. 12p.
Abstract: As an effective capacitance signal produced by a micro-hemisphere gyro is usually below the pF level, and the capacitance reading process is susceptible to parasitic capacitance and environmental noise, it is highly difficult to acquire an effective ca...
Wide Temperature Range and Low Temperature Drift Eddy Current Displacement Sensor Using Digital Correlation Demodulation.
Publication Type: Academic Journal
Source(s): Sensors (14248220). May2023, Vol. 23 Issue 10, p4895. 15p.
Abstract: Conventional eddy-current sensors have the advantages of being contactless and having high bandwidth and high sensitivity. They are widely used in micro-displacement measurement, micro-angle measurement, and rotational speed measurement. However, they ...
Phase Error Evaluation via Differentiation and Cross-Multiplication Demodulation in Phase-Sensitive Optical Time-Domain Reflectometry.
Publication Type: Academic Journal
Source(s): Photonics. May2023, Vol. 10 Issue 5, p514. 14p.
Abstract: Phase-sensitive optical time-domain reflectometry (φOTDR) is a technology for distributed vibration sensing, where vibration amplitudes are determined by recovering the phase of the backscattered light. Measurement noise induces phase errors, which deg...
Research on the Linear Demodulation Range and Background Noise of Fiber-Optic Interferometer System.
Publication Type: Academic Journal
Source(s): Photonics. Mar2023, Vol. 10 Issue 3, p283. 8p.
Abstract: The linear demodulation range and background noise of the Michelson interferometer system are investigated with a laser phase noise measurement system. We have theoretically and experimentally analyzed the performance of the interferometer system by ch...
FPGA-Based Hardware Implementation of Homodyne Demodulation for Optical Fiber Sensors.
Publication Type: Academic Journal
Source(s): Photonics. Mar2023, Vol. 10 Issue 3, p258. 13p.
Abstract: Homodyne demodulation is a convenient technique for signal detection in interferometric sensors. The demodulation process is typically developed using analog circuits. However, to improve the performance of the demodulator, a digital system must be emp...
A Wavelet Derivative Spectrum Length Method of TFBG Sensor Demodulation.
Publication Type: Academic Journal
Source(s): Sensors (14248220). Feb2023, Vol. 23 Issue 4, p2295. 14p.
Abstract: Fibre optic sensors using tilted fibre Bragg grating (TFBG) have high sensitivity for refractive index measurements. In order to achieve good metrological parameters of the measurement, an appropriate method of spectrum demodulation must be used. The m...