搜索结果: 1-15 共查到“光学工程 UWB”相关记录16条 . 查询时间(0.048 秒)
一站固定式双基地低频UWB SAR具有方位移变的距离徙动和较长的合成孔径，这导致其距离方位耦合变得非常复杂，从而限制了频域算法的应用.为此，本文提出一种基于椭圆极坐标的一站固定式双基地低频UWB SAR FFBP算法.基于一站固定式双基地SAR的成像几何，分别推导了直角坐标与椭圆极坐标下后向投影算法的解析表达式，并讨论了双基地FFBP算法中采用椭圆极坐标的优势.然后分别从频带和斜距误差角度推导了子...
Transmission of Multi-Band OFDM-UWB Signals along NG-FTTH Networks using Directly Modulated Lasers
Modulation Optical communications
2011/5/26
Transmission of multi-band OFDM-UWB signals along FTTH networks using directly modulated lasers is experimentally evaluated. Reach of 100 km of standard SMF is achieved with a BER below 10 -4 and an O...
First Demonstration of HD Video Distribution over Large-Core POF employing UWB for In-Home Networks
Fiber optics communications Polymers Microwaves
2011/5/25
We demonstrate a proof of concept real time HD video stream delivery over 50m 1mm core diameter plastic optical fiber and 3m wireless link employing MB-OFDM UWB technology for in-home networks.
5 Gbps IR-UWB Signal Generation and Fiber Transmission Based on Optical Pulse Compression
Radio frequency photonics Optical communications
2011/5/22
Tunable optical pulse compression is proposed to generate the FCC compliant impulse radio utra-wideband (IR-UWB) pulses with high speed modulation. Experimental generation and transmission of up to 5 ...
Robust BPSK Impulse Radio UWB-over-Fiber Systems Using Optical Phase Modulation
Coherent communications Radio frequency photonics
2011/5/22
The impact of fiber dispersion on the performance of optical phase modulated impulse-radio-ultrawideband (IR-UWB) signals is experimentally investigated. 2Gbps BPSK IR-UWB over 78km fiber transmission...
Impact of Crosstalk on MB-OFDM UWB Transmission in Radio over Fiber WDM System
Fiber optics optical communications Radio frequency photonics
2011/5/22
We experimentally investigate the impact of crosstalk on the performance of MB-OFDM UWB signal transmission in RoF WDM system. It is found that OFDM signal’s orthogonalities are almost kept after 20 k...
Beyond 2.5Gb/s Photonic Generation and Wireless Transmission of Different Pulse Modulation Formats for a High Speed Impulse Radio UWB over Fiber System
Fiber optics communications Radio frequency photonics
2011/5/22
We experimentally demonstrate beyond 2.5Gbps photonic generation of different pulse modulation formats for impulse radio ultra-wideband (IR-UWB) over fiber application. IR-UWB transmission over 20km f...
Service Multicasting by All-Optical Routing of 1 Gb/s IR-UWB for In-Building Networks
Multicasting All-Optical Routing IR-UWB Building Networks
2011/5/18
We propose and demonstrate, for the first time, service multicasting by all-opticalrouting of 1 Gb/s IR-UWB using XGM of SOA. This technique has potential applications for integrating IR-UWB with WDM ...
Impact of RF Noise on Transmission Performance of Multiband OFDM UWB over Fiber Systems
RF Noise Multiband OFDM UWB over Fiber Systems Transmission Performance
2011/5/15
We investigate the performance of multiband OFDM ultra wideband (UWB) signal over fiber system considering the impact of RF noise. A compensation technique is proposed to reduce RF noise impact.
Bidirectional 3.125 Gbps Downstream / 2 Gbps Upstream Impulse Radio Ultrawide-band (UWB) over Combined Fiber and Wireless Link
Fiber optics communications Fiber optics links subsystems
2010/6/8
We demonstrate bidirectional fiber and wireless transmission of impulse radio ultra-wideband at 3.125Gbps downstream and 2Gbps upstream. After transmission over 50km fiber and 1.85m wireless link both...
Simultaneous Transmission of 256-QAM WIMAX at 5.7GHz and Optically Generated Impulse Radio UWB over Fiber for Indoor Wireless Multi-Services
Radio frequency photonics Optical communications
2010/6/4
Fiber transmission of simultaneous optically generated FCC compliant 625Mbps impulse radio UWB and 80Mbps 256-QAM IEEE 802.16 WIMAX signals is experimentally demonstrated by using a single directly mo...
A UWB over Fibre Transmitter Reconfigurable for Multiple Modulation Schemes
UWB Fibre Transmitter Multiple Modulation Schemes
2009/7/17
A UWB over fiber transmitter that can be reconfigured to implement pulse-polarity modulation, pulse-shape modulation, pulse-amplitude modulation and on-off keying modulation is proposed and demonstrat...
3.125 Gb/s Impulse Radio UWB over Fiber Transmission
Gb/s Impulse Radio UWB Fiber Transmission
2009/7/17
We demonstrate 3.125 Gb/s photonic impulse radio UWB generation using an uncooled distributed feedback laser. After 50km fiber transmission the signal is recovered without errors using a digital signa...
Novel Optical Generation of Ultrawideband (UWB) Signals Using Quadratic Nonlinear Interactions Seeded By Normal/Dark Pulses
Optical Ultrawideband (UWB) Quadratic Nonlinear Seeded Normal/Dark Pulses
2009/7/17
We report two approaches to generate optical ultrawideband (UWB) signals using quadratic nonlinear interactions in periodically poled lithium niobate (PPLN) seeded by either normal or dark pulses. Pai...
Performance comparison of radio-over-fibre UWB distribution in SSMF and MMF optical media
radio-over-fibre UWB distribution SSMF MMF optical media
2008/7/31
The performance of OFDM and IR-UWB radio-over-fibre distribution by direct and external modulation on SSMF/MMF is presented. Both UWB implementations achieve 75 km reach on SSMF.