搜索结果: 1-15 共查到“Phase Noise”相关记录31条 . 查询时间(0.079 秒)
PHASE NOISE INVESTIGATION OF MAXIMUM LIKELIHOOD ESTIMATION METHOD FOR AIRBORNE MULTIBASELINE SAR INTERFEROMETRY
Synthetic aperture radar (SAR) Interferometry Multibaseline Maximum likelihood Phase unwrapping MEMPHIS Millimeter wave radar Ka-band
2015/4/1
The phase estimation of cross-track multibaseline synthetic aperture interferometric data is usually thought to be very efficiently achieved using the maximum likelihood (ML) method. The suitability o...
This investigation proposes a novel all-optical phase noise averager to reduce residual phase noise in the differential phase-shift keying (DPSK) transmission system with phase-preserving amplitude re...
Evaluation the Performance Improvement of DPSK Signals by Amplitude Regeneration and Phase Noise Suppression
Offset frequency dynamics and phase noise properties of a self-referenced 10 GHz Ti:sapphire frequency comb
Offset frequency dynamics phase noise properties self-referenced 10 GHz sapphire frequency comb
2011/8/11
Abstract: This paper shows the experimental details of the stabilization scheme that allows full control of the repetition rate and the carrier-envelope offset frequency of a 10 GHz frequency comb bas...
Low phase noise diode laser oscillator for 1S-2S spectroscopy in atomic hydrogen
Low phase noise diode laser oscillator 1S-2S spectroscopy atomic hydrogen
2011/8/16
Abstract: We report on a low-noise diode laser oscillator at 972 nm actively stabilized to an ultra-stable vibrationally- and thermally compensated reference cavity. To increase the fraction of laser ...
An Optical Fibre Pulse Rate Multiplier for Ultra-low Phase-noise Signal Generation
Optical Fibre Ultra-low Phase-noise Signal
2011/9/6
In this letter we report on an all optical-fibre approach to the synthesis of ultra-low noise microwave signals by photodetection of femtosecond laser pulses. We use a cascade of Mach-Zehnder fibre in...
Constant Envelope Optical OFDM for Improved Nonlinear and Phase Noise Tolerance
Fiber optics communication Phase Modulation
2015/5/25
We introduce a new concept of OFDM transmission with constant envelope and coherent detection to reduce the sensitivity of OFDM signals to nonlinear effects and phase noise.
System Impacts of Modulation Technology and Phase Noise on Coherent Analog Optical Links
Radio frequency photonics
2015/5/22
We describe an analog optical link using amplitude modulation and coherent detection for high SFDR, gain, and low noise figure. We then address the dominant performance-limiting parameters and discuss...
Nonlinearity and Phase Noise in High-Current Photodetectors
Photodetectors Radio frequency photonics
2015/5/22
Great progress has been made in the past decade in developing high-current photodetec-tors, but the modeling of these devices has not kept pace. The status of the devices and the models is reviewed.
Optimization of 16-point Ring Constellations in the Presence of Nonlinear Phase Noise
Fiber optics communications Coherent communications
2015/5/21
The optimum radius distribution in terms of the average symbol error rate (SER)for different 16-pointsignal sets is derived numericallyfor a fiber channel limited by nonlinear phase noise. The results...
Phase Noise and Timing Jitter Eliminator for Mode-locked Lasers Based on External Graphene Layers
Mode-locked lasers Nanomaterials
2015/5/21
We demonstrate a noise eliminator with a reduction of 34% for phase noise and timing jitter based on external graphene layers for mode-locked lasers by absorbing the low-power background noise from th...
Mitigation of Dispersion-Induced Phase Noise for an Optical OFDM Radio-over-Fiber System at 60-GHz Band
Fiber optics communications Lasers fiber Radio frequency photonics
2015/5/21
For OFDM RoF systems at 60-GHz band, dispersion-induced phase noise (PN) could heavily degrade transmission performance. We propose an algorithm to suppress PN and experimentally demonstrate the algor...
Characterization of Semiconductor-Laser Phase Noise with Digital Coherent Receivers
Characterization Semiconductor-Laser Phase Noise Digital Coherent Receivers
2015/5/20
We develop a method of characterizing semiconductor-laser phase noise using a digital coherent receiver. The field spectrum, FM-noise spectrum, and phase-error variance can completely describe phase-n...
2-cm spatial resolution over 40 km realized by bandwidth- division phase-noise-compensated OFDR
spatial resolution bandwidth- division noise-compensated OFDR
2015/5/18
We propose a bandwidth-division phase-noise-compensated optical frequency domain reflectometry technique. Using this approach, we realize a spatial resolution of 2 cm over 40 km in a normal laboratory...
High-Sensitivity Phase Noise Monitoring Using a Phase-Asymmetric Nonlinear Loop Mirror
High-Sensitivity Phase Noise Nonlinear Loop Mirror
2015/5/15
A high-sensitivity phase noise (PN) monitoring technique is proposed and demonstrated using a phase-asymmetric nonlinear loop mirror (PANLM). The phase-error variations from 4 0 to 52 0 are extracted ...