概括
本研究提出了一个简化的极化不敏感的连贯无线电-光纤链接. 它通过使用一种新的数字信号处理算法来提高频谱效率和传输能力.
科学领域:
- 光电学是指光电子产品.
- 光学通信是指光学通信.
- 信号处理 信号处理
背景情况:
- 传统的偏振多样性连贯接收器 (PDCR) 是复杂的,需要多个偏振分离器,混合体和光探测器.
- 在无线电光纤 (RoF) 链路中实现极化不敏感的检测和光谱重叠信号的解复,存在重大挑战.
研究的目的:
- 提出并证明一种简化,极化不敏感的连贯的RoF链接,并提高频谱效率和传输能力.
- 引入一种新的数字信号处理 (DSP) 算法,用于极化不敏感的检测和联合相位噪声消除.
主要方法:
- 采用了一种简化的PDCR,使用一个偏振分离器 (PBS),一个光学合器 (OC) 和两个光电探测器 (PD).
- 开发了一种新的DSP算法,以实现两种光谱重叠的微波矢量信号的极化不敏感检测和解复.
- 该算法还解决了来自发射器和局部振荡器 (LO) 激光源的联合相位噪声的消除.
主要成果:
- 证明了在25公里单模光纤 (SMF) 上,成功传输和检测了两个独立的16次方格振幅调制 (16QAM) 微波矢量信号,其频率为3GHz,符号速率为0.5GSym/s.
- 与传统的PDCR相比,简化的接收器架构显著减少了组件数量.
- 微波矢量信号的频谱叠加导致了光谱效率和数据传输能力的提高.
结论:
- 拟议的简化一致的RoF链接与一个新的DSP算法为高容量光通信系统提供了具有成本效益和高效的解决方案.
- 这种方法有效地克服了传统PDCR的局限性,使得极化不敏感的操作和更好的光谱效率.
- 展示的系统为在未来的无线电光纤应用中提高性能铺平了道路.
相关概念视频
Energy Stored In A Coaxial Cable
1.6K
A coaxial cable consists of a central copper conductor used for transmitting signals, followed by an insulator shield, a metallic braided mesh that prevents signal interference, and a plastic layer that encases the entire assembly.
In the simplest form, a coaxial cable can be represented by two long hollow concentric cylinders in which the current flows in opposite directions. The magnetic field inside and outside the coaxial cable is determined by using Ampère's law. The magnetic...
In the simplest form, a coaxial cable can be represented by two long hollow concentric cylinders in which the current flows in opposite directions. The magnetic field inside and outside the coaxial cable is determined by using Ampère's law. The magnetic...
1.6K
Group Polarization
34.4K
Group polarization is the strengthening of an original group attitude following the discussion of views within a group (Teger & Pruitt, 1967). That is, if a group initially favors a viewpoint, after discussion the group consensus is likely a stronger endorsement of the viewpoint. Conversely, if the group was initially opposed to a viewpoint, group discussion would likely lead to stronger opposition.
34.4K
Dielectric Polarization in a Capacitor
4.8K
The presence of a dielectric medium in a capacitor not only changes the voltage and capacitance but also affects the electric field. In general, dielectrics can be of two types: polar and nonpolar. In a polar dielectric, the positive and negative charges in the molecules are separated by a distance and hence have a permanent dipole moment. In contrast, no such charge separation exists in a nonpolar dielectric, however the nonpolar molecules get polarized in the presence of an external electric...
4.8K
Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)
412
Insensitive Nuclei Enhanced by Polarization Transfer (INEPT) is an advanced Nuclear Magnetic Resonance (NMR) technique specifically designed to detect and enhance the signals of low-abundance nuclei, such as carbon-13 and nitrogen-15, in small molecules. The fundamental principle behind INEPT is the transfer of polarization from a more abundant and highly polarizable nucleus, typically hydrogen-1, to the low-abundance nucleus of interest. This process effectively boosts the NMR signal of the...
412
Propagation Speed of Electromagnetic Waves
3.5K
Electromagnetic waves are consistent with Ampere's law. Assuming there is no conduction current Ampere's law is given as:
3.5K
Maximum Power Transfer
293
Numerous practical applications within engineering disciplines, such as telecommunications, necessitate optimizing power delivery to a connected load. This pursuit, however, entails inherent internal losses, which can either equal or exceed the power supplied to the load. The Thevenin equivalent circuit is helpful in finding the maximum power a linear circuit can deliver to a load. It is assumed in this context that the load resistance can be adjusted.
By substituting the entire circuit with...
By substituting the entire circuit with...
293


