搜索结果: 1-12 共查到“光学工程 MIMO”相关记录12条 . 查询时间(1.734 秒)
近日，北京理工大学信息与电子学院司黎明副教授，硕士研究生江海鑫，吕昕教授与华东师范大学信息科学技术学院丁军研究员利用超宽带各向异性超材料提升5G MIMO天线系统性能，在非常近的距离（1mm）下抑制了MIMO天线间互耦，同时增加5G MIMO天线系统的工作带宽和辐射增益。相关结果以“Broadband extremely close-spaced 5G MIMO antenna with mutu...
针对分布式MIMO雷达分集路径相关时对检测性能影响问题，基于有限散射点目标模型，在NeymanPearson准则下研究了分集路径相关时分布式MIMO雷达检测方法和性能；该检测器的充分统计量服从加权卡方分布，推导得到了检测概率与虚警概率的近似解析表达式；数值仿真表明：分集路径相关会降低分布式MIMO的空间分集能力，在高信噪比时，MIMO雷达的检测性能随着分集路径相关性的增强而恶化；而在低信噪比时分集...
FSO MIMO系统中迭代译码算法的研究
自由空间光通信 MIMO MCMC
2016/8/24
自由空间光通信（FSO）系统是一种新型的宽带接入系统，结合了光纤通信与微波通信的优点。但是FSO系统容易受到环境和天气状态的影响，把多输入多输出（MIMO）技术应用于FSO系统中可以有效改善大气对激光波束的影响，提高系统性能。文中主要研究了FSO-MIMO系统的空时译码问题，结合传统的一些译码算法，把Turbo码的迭代译码思想应用于FSO MIMO的空时译码中，分析了一种基于马尔科夫链蒙特卡洛（M...
Distributed MIMO Antenna Architecture for Wireless-over-Fiber Backhaul with Multicarrier Optical Phase Modulation
Coherent communications Phase modulation Radio frequency photonics
2015/5/26
A novel optical phase-modulated wireless-over-fiber backhaul architecture for next generation cellular network is presented and experimentally demonstrated for high capacity wireless multicarrier upli...
MIMO System Capacity Improvements Using Radio-over- Fibre Distributed Antenna System Technology
Fiber optics communications Radio frequency photonics Fiber optics links subsystems
2015/5/25
The effect of antenna separation in a 3×3 MIMO system using RoF DAS technology is investigated. Larger antenna separation is found to improve the throughput due to reduced channel correlation and impr...
Computationally-Efficient DSP-based MIMO Equalization for OSNR gains in 40Gb/s OFDMA-PON
Computationally-Efficient DSP-based MIMO Equalization OSNR gains 40Gb/s OFDMA-PON
2015/5/25
We present and experimentally verify a novel computationally-efficient MIMO equalization method in 40Gb/s OFDMA-PON with polarization multiplexing and direct detection. A 2.1dB DSP-based OSNR gain is ...
Optical Central Clock Distribution for MIMO-Enabled,Millimeter Wave Wireless Interconnects
Optics in Computing Optical Interconnects
2015/5/22
We propose a novel optical clock distribution scheme for MIMO-enhanced wireless interconnects. Low-power, error-free, multi-gigabit wireless transmission has been demonstrated by employing centrally d...
MIMO enabled 40 Gb/s transmission using mode division multiplexing in multimode fiber
Fiber optics links subsystems Optical communications
2015/6/8
Transmission of 40Gb/s intensity modulated NRZ data over 1.1km of multimode fiber has been experimentally demonstrated using modal diversity and receiver based 2x2 MIMO digital signal processing with ...
Multi-service Multi-carrier Broadband MIMO Distributed Antenna Systems for In-building Optical Wireless Access
Optical communications Radio frequency photonics
2015/6/4
A novel broad spectrum band-shifting technique is experimentally demonstrated to simultaneously transmit broadband (500MHz to 3 GHz) multi-service, multi-carrier MIMO signals for in-building radio-ove...
基于DPIM调制的MIMO空间光通信系统
光通信 分布式多入多出 数字脉冲间隔调制
2009/10/15
为了抑制空间光通信中大气湍流效应和降低误包率,提出了一种引入分布式多出多入技术，基于数字脉冲间隔调制的多出多入空间光通信系统.在弱湍流信道模型和APD探测器下建立了多出多入系统链路模型，推导了最大似然检测下的最佳阈值和误包率.计算结果表明：发射分集通过多路径传输平滑接收信号光强起伏|接收分集增加孔径平滑效应，减弱接收光强起伏|在发射平均功率、接收孔径总面积和背景噪音相同的条件下，数字脉冲间隔调制的...
100 Gb/s Per-Channel Free-Space Optical Transmission with Coherent Detection and MIMO Processing
Per-Channel Free-Space Optical Transmission Coherent Detection MIMO Processing
2015/7/20
We experimentally demonstrate the first 100 Gb/s per-channel free-space optical transmission using polarization-multiplexed QPSK, coherent detection, and MIMO processing. This is the highest per-chann...
Polarization Multiplexed 100 Gbps Direct-Detection OFDM Transmission without MIMO Processing
Polarization Multiplexed Direct-Detection OFDM Transmission MIMO Processing
2015/7/14
We propose a low-overhead method of polarization multiplexing in direct detection OFDM that requires no digital MIMO processing. Using 16QAM and only 31GHz bandwidth, 100 Gbps transmission over 80 km ...