搜索结果: 1-15 共查到“光纤光学及技术 OFDM”相关记录25条 . 查询时间(0.125 秒)
基于异步时钟的高速实时光OFDM 收发系统
光正交频分复用 异步时钟 误码率
2013/1/19
近年来, 由于正交频分复用(orthogonal frequency division multiplexing, OFDM)技术具有独特的优势, 已经在无线电领域得到广泛应用, 并开始被引入光通信中. 目前, 对于光正交频分复用(optical OFDM, OOFDM) 技术的研究, 主要集中在离线实验分析和基于全局时钟的实时分析. 提出了一种基于异步时钟的高速实时光OFDM收发系统, 通过实验...
非理想载波同步下的OFDM快衰落信道估计
非理想载波同步 快衰落 信道估计 正交频分复用
2012/2/29
针对非理想载波同步下的正交频分复用（orthogonal frequency-division multiplexing,OFDM）系统，提出一种快衰落信道估计算法.首先，提出一种紧凑型广义信道冲击响应（generalized channel impulse response,G-CIR）自相关矩阵的对角化方法，使其随机性仅体现在对角阵中;然后，提出一种紧凑型G-CIR矩阵的压缩表示方法及其等效信...
A Novel Scheme for Seamless Integration of ROF System with OFDM-CPM WDM Passive Optical Network
Networks Fiber optics communications
2011/5/26
A novel scheme to generate, transmit and receive an optical OFDM-CPM signal in the architecture for seamless integration of ROF system with 4 × 2.5Gb/s WDM-PON is proposed and experimentally validated...
Scattered Pilot Channel Tracking Method for PDM-CO- OFDM Transmissions Using Polar-Based Intra-Symbol Frequency-Domain Average
Fiber optics communications Modulation
2011/5/25
We have demonstrated an efficient scattered pilot channel tracking approach with a new polar-based intra-symbol frequency domain average (ISFA) for 16-QAM, 40-Gb/s PDM-CO-OFDM systems. This proposal c...
Cyclic Prefix Free 10-Gb/s OFDM for a DML-Based Long- Reach Optical Access Using Joint Time and Frequency Domain Equalization Algorithm
Fiber optics links subsystems Modulation
2011/5/25
Without using a cyclic prefix, a DML-based 10-Gb/s OFDM at 2.5-GHz bandwidth transmission over 65-km SMF is demonstrated to be possible while maintaining the efficient throughput and short-latency tim...
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...
117-Gb/s Optical OFDM Super-channel Transmission over 1200-km SSMF Using Direct Detection and EDFA-Only Amplification
Fiber optics communications Modulation
2011/5/22
With EDFA-only amplification, we successfully demonstrate the transmission of a 4-QAM, 117-Gb/s (100 Gb/s without overhead) DDO-OFDM super-channel over 1200-km SSMF with only 1-dB OSNR penalty. We als...
An Optimal Tone Reservation Method for IM/DD Optical OFDM Transmission in Multimode Fiber
Optimal Tone Reservation Method IM/DD Optical OFDM Transmission Multimode Fiber
2011/5/20
We propose an optimal, yet efficient tone reservation method which enables distortion-free IM/DD optical OFDM transmission with no additional bias. Compared to previous approaches, both spectral and p...
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.
Specialty Fiber Evaluation for In-building Distribution of Multiple-Format OFDM Radio Signals
OFDM Radio Signal building Distribution Specialty Fiber
2011/5/15
Optical fiber options for deployment within the home environment were investigated for distribution of triple-play services. Corning ClearCurve® ZBL single-mode bend-insensitive optical fiber per...
1-Tb/s Large Girth LDPC-Coded Coherent Optical OFDM Transmission over 1040-km Standard Single-Mode Fiber
Large Girth LDPC-Coded Coherent Optical OFDM Standard Single-Mode Fiber
2011/5/15
We experimentally demonstrate 1-Tb/s CO-OFDM transmission over 1040-km standard single-mode fiber using 50% overhead girth-12 LDPC-coded 16-QAM. More than 4-dB improvement in OSNR sensitivity is achie...
QPSK-OFDM Radio over Polymer Optical Fiber for Broadband In-building 60GHz Wireless Access
Fiber optical communications Fiber optics links subsystems
2010/6/9
500Mb/s Quadrature Phase-Shift Keying (QPSK)-Orthogonal Frequency Division Multiplexing (OFDM) signals on 60-GHz mm-wave are experimentally demonstrated over 100-m graded-index polymer optical fiber w...
Link Performance Improved 16QAM-OFDM 60-GHz Radio-over-Fiber System Employing Convolutional Codes
Fiber optical communications Fiber optics links subsystems
2010/6/8
We demonstrated the first transmission of 750-Mb/s 16QAM-OFDM signal over 1-km SMF-28 and 6-m air-link with 60-GHz ROF technology. The system improvement and low-power efficiency of RF transmitter are...
OFDM Spectral Efficiency Limits from Fiber and System Non-Linearities
Fiber optic communication Modulation
2010/6/8
Coherent optical OFDM systems offer a straight-forward approach to address high spectral effi-ciency. Non-linear impairments set limits to the maximum spectral efficiency. The limiting effects are ex-...
110-Gb/s Multi-band Real-time Coherent Optical OFDM Reception after 600-km Transmission over SSMF Fiber
Fiber optics links subsystems Coherent communications
2010/6/8
We demonstrate real-time reception of a 110-Gb/s multi-band OFDM signal after transmission of 600-km SSMF fiber and 400-ps differential-group-delay. The performance of 110-Gb/s CO-OFDM signal is chara...