通过FBMC OWC中的功率负载平衡噪声和非线性扭曲
Applied optics
|August 12, 2025
概括
本研究引入了一种新的非线性功率负载 (NPL) 算法,以减轻光学无线通信中的非线性扭曲. 在不增加计算复杂性的情况下,NPL通过优化子载波功率和负载来提高数据速率.
科学领域:
- 光学无线通信的无线通信.
- 信号处理 信号处理
- 在 LED 技术 LED 技术.
背景情况:
- 非线性扭曲 (ND) 是基于LED的光学无线通信系统的一个主要局限性,特别是在多载波调制.
- 现有的缓解技术,如电源备用关闭或复杂的等效器增加计算负载.
- 有效地管理ND对于实现更高的数据速率至关重要.
研究的目的:
- 展示一种在不增加计算成本的情况下减轻多载波光学无线通信中的非线性扭曲的方法.
- 引入和评估一种新的自适应非线性功率负载 (NPL) 算法.
- 为了提高在使用偏移方格振幅调制过器银行多载体的系统中的非对称信息速率.
主要方法:
- 使用非线性LED行为模型进行理论分析.
- 实验验证子载体功率负载与位或负载相结合.
- 统一功率负载,预强调和拟议的NPL算法的比较.
主要成果:
- 拟议的NPL算法有效地抑制了ND,在中间功率水平上表现优于均负载和预强调.
- 将NPL与负荷 (EL) 结合起来,可以比传统EL提高11%的非对称信息速率.
- 与莱文-坎佩洛算法相比,观察到17%的收益.
结论:
- 副载波功率加载与位或加载相结合,是多载波光学无线系统中减轻ND的有效策略.
- 适应性NPL算法为ND缓解提供了卓越的性能,而不会增加计算复杂性.
- 这种方法可以在光学无线通信系统中实现更高的数据速率.
更多相关视频
11:44Real-Time DC-dynamic Biasing Method for Switching Time Improvement in Severely Underdamped Fringing-field Electrostatic MEMS Actuators
Published on: August 15, 2014
10.4K
08:32Assembly and Characterization of an External Driver for the Generation of Sub-Kilohertz Oscillatory Flow in Microchannels
Published on: January 28, 2022
2.5K
相关概念视频
Power Factor Correction
261
The power transmission to a factory involves the transfer of apparent power, a combination of active and reactive power. The power factor measures how effectively electrical power is converted into useful work output. The ratio of the real power (KW) that does the work to the apparent power (KVA) supplied to the circuit.
261
Biasing of FET
368
Biasing a Junction Field Effect Transistor (JFET) is crucial for setting operational parameters and ensuring efficient functioning in electronic circuits. JFETs are characterized by using a single carrier type in N-channel or P-channel configurations, where the channel is surrounded by PN junctions. These junctions are central to the device's ability to control current flow.
In an N-channel JFET, the structure consists of N-type material forming the channel on a P-type substrate, with the...
In an N-channel JFET, the structure consists of N-type material forming the channel on a P-type substrate, with the...
368
Cascaded Op Amps
731
Operational amplifiers (op-amps) are versatile electronic components that can be interconnected in a cascade - one after another in a linear sequence. This cascading is possible due to their infinite input resistance and zero output resistance, allowing them to maintain their input-output relationships even when connected in series.
In a cascaded system, each op-amp is referred to as a stage. The output of one stage drives the input of the subsequent stage. As the input signal passes through...
In a cascaded system, each op-amp is referred to as a stage. The output of one stage drives the input of the subsequent stage. As the input signal passes through...
731
Load-frequency control
257
Load-frequency control (LFC) is vital for maintaining power system stability, ensuring that frequency and power flows remain within acceptable limits during load changes. Turbine-governor control eliminates rotor accelerations and decelerations following load changes. However, a steady-state frequency error persists when the change in the turbine-governor reference setting is zero. In an interconnected power system, each area agrees to export or import a scheduled amount of power through...
257
Upsampling
310
Managing signal sampling rates is essential in digital signal processing to maintain signal integrity. A decimated signal, characterized by a reduced frequency range due to its lower sampling rate, can be upsampled by inserting zeros between each sample. This upsampling process expands the original spectrum and introduces repeated spectral replicas at intervals dictated by the new Nyquist frequency. To refine this zero-inserted sequence, it is passed through a lowpass filter with a cutoff...
310
Maximum Power Transfer
405
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...
405
