搜索结果: 1-15 共查到“知识库 光信息技术 Systems”相关记录66条 . 查询时间(0.229 秒)
COMPARATIVE GEOMETRICAL ACCURACY INVESTIGATIONS OF HAND-HELD 3D SCANNING SYSTEMS – AN UPDATE
3D mesh point cloud reference structured light systems VDI/VDE
2018/3/30
Hand-held 3D scanning systems are increasingly available on the market from several system manufacturers. These systems are deployed for 3D recording of objects with different size in diverse applicat...
3D VIRTUAL CH INTERACTIVE INFORMATION SYSTEMS FOR A SMART WEB BROWSING EXPERIENCE FOR DESKTOP PCS AND MOBILE DEVICES
3D model Cultural Heritage WebGL ICT UAV Photogrammetry HTML5
2018/3/30
Recently, the diffusion of knowledge on Cultural Heritage (CH) has become an element of primary importance for its valorization. At the same time, the diffusion of surveys based on UAV Unmanned Aerial...
Channel Estimation Using Superimposed Training for Coherent Optical OFDM Systems
Channel Estimation Superimposed Training Optical OFDM Systems
2013/12/2
We demonstrate by simulation that the superimposed training based channel estimation scheme can achieve similar performance as compared with conventional schemes, without any loss in bandwidth. An ite...
Speckle Reduction in Imaging Projection Systems
Diffractive Diffusers Speckle Contrast Reduction Laser Pico-Projectors
2012/12/28
Diffractive diffusers (phase gratings) are routinely used for homogenizing and beam shaping for laser beam applications. Another use for diffractive diffusers is in the reduction of speckle for pico-p...
A new impulse-type display named Local Blinking High Dynamic Range (HDR) LCD System was proposed, which utilized local dimming technology to achieve a local blinking effect that not only suppressed mo...
Impact of ADC Bandwidth and Clipping Ratio on COF-PON Systems Based on Spatial Coding and Subcarrier Multiplexing
Analog-to-digital convertor (ADC) clipping ratio code-division-multiplexing (CDM) passive optical networks (PON) subcarrier multiplexing
2011/12/2
In this paper, we analyze the impact of analog-to digital convertor (ADC) bandwidth and clipping ratio on the performance of a 1 Gb/s x 15 user CDM-over-fiber-PON (COF PON) system based on 16-QAM modu...
In this paper, we present a reliable architecture for high-capacity fiber-radio system and demonstrate its feasibility. The main trunk of the proposed architecture is a star network with branches comp...
Effects of filter bandwidth and driving voltage on optical duobinary transmission systems
2011/11/23
This work demonstrates how electrical driving voltage of a Mach–Zehnder modulator and the bandwidth of electrical low-pass filters (LPFs) affect optical duobinary signals. The fact that a 100% driving...
This work investigates the effect of phase fluctuation averaging on phase fluctuation induced by intrachannel four-wave mixing (IFWM) in highly dispersed differential phase-shift keying transmission s...
We propose a novel dispersion-free interleaver using optical delay lines by accurately locating the zeros in the transfer function. It has been implemented with the design of interleaver pairs with th...
Synthesis of Chained Achromatic Layer Systems Forming Controlled Low Transmittance Bands
Thin Films Design Light Propagation
2011/9/30
The approach utilized in the design of achromatic periods formed of two layers a high-index and a low-index is developed by combining the first two periods together. These two periods are therefore re...
Long-Haul Atmospheric Laser Communication Systems
Free-space optical comm Optical comm Atmospheric propagation
2011/5/26
Optical communications provides an attractive means of achieving wideband data transfer over long distances. We review perceived challenges and enabling technology developments that promise to facilit...
Fast Parallelized Simulation of 112 Gb/s CP-QPSK Transmission Systems using Stratified Monte-Carlo Sampling
Fiber optics communications Coherent communications
2011/5/26
A novel parallelized implementation of the split-step Fourier method on graphics processing units was developed. The combination of Monte-Carlo simulations with single and double precision yields a sp...
Characterization and Monitoring of Laser Linewidths in Coherent Optical OFDM Systems
Fiber optics communications Modulation
2011/5/26
We demonstrate monitoring of digitally-generated laser linewidths for 107-Gb/s coherent optical OFDM systems. Unique characteristics of time-domain phase-error variance are exploited to extract laser ...