相关实验视频
Updated: Jul 16, 2025

09:36
Characterization of Anisotropic Leaky Mode Modulators for Holovideo
Published on: March 19, 2016
8.0K
诺玛合作VLC系统:设计和性能分析与OOK和L-PPM调制
Applied optics
|September 14, 2023
概括
本研究介绍了可见光通信 (VLC) 系统的非对角多重访问 (NOMA) 合作技术. 拟议的方法提高了空间多样性和系统容量,通过比特错误概率计算进行验证.
科学领域:
- 光学通信是指光学通信.
- 无线网络无线网络.
- 信号处理 信号处理
背景情况:
- 可见光通信 (VLC) 利用白色LED进行同时照明和数据传输,提高资源效率.
- 包括中继在内的合作通信策略可以显著提高无线系统的空间多样性,覆盖范围和容量.
- 非对角多重接入 (NOMA) 是一种先进的多重接入技术,使多个用户能够共享相同的资源,提高光谱效率.
研究的目的:
- 为可见光通信 (VLC) 系统提出和分析新的非对角多重访问 (NOMA) 合作技术.
- 通过使用开关键 (OOK) 和L-脉冲位置调制 (L-PPM) 来评估这些技术的性能.
- 为了研究连续干扰取消 (SIC) 在完美和不完美的条件下对系统性能的影响.
主要方法:
- 开发使用OOK和L-PPM调制的NOMA合作VLC系统模型.
- 在信号聚合的接收机上实现最大比率组合 (MRC).
- 通过了合作传输的解码和转发中继协议.
- 对多用户,两用户和三用户场景的比特错误概率 (BEP) 的分析计算.
主要成果:
- 该研究提供了拟议的NOMA合作VLC系统的比特错误概率 (BEP) 的分析表达式.
- 在完美和不完美的连续干扰取消 (SIC) 场景下进行性能评估.
- 模拟结果被生成以证实衍生的分析BEP结果.
结论:
- 拟议的NOMA合作技术提供了一种可行的方法来提高VLC系统的性能.
- 开发的分析框架允许在各种条件下准确预测系统行为.
- 这些发现证实了合作NOMA策略在提高VLC网络空间多样性和容量的有效性.
相关概念视频
Transmission Line Design Considerations
164
Aluminum has become the material of choice for overhead transmission lines, surpassing copper due to its abundance and cost-effectiveness. The most prevalent type is the aluminum conductor, steel-reinforced (ACSR), which combines aluminum strands around a steel core. Other variants include all-aluminum conductors (AAC), all-aluminum alloy conductors (AAAC), aluminum conductor alloy-reinforced (ACAR), and aluminum-clad steel conductors. Advanced designs, such as aluminum conductors with steel...
164
Characteristics of OpAmp
813
The operational amplifier, commonly known as an op-amp, is a specially designed electronic circuit component. Its purpose is to work in conjunction with other circuit elements to execute a defined signal-processing operation. Consider an equivalent circuit model of an op-amp, as depicted in Figure 1; the output section comprises a voltage-controlled source in parallel with the output resistance Ro.
813
Maximum Power Transfer
285
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...
285
Receiver Operating Characteristic Plot
280
A ROC (Receiver Operating Characteristic) plot is a graphical tool used to assess the performance of a binary classification model by illustrating the trade-off between sensitivity (true positive rate) and specificity (false positive rate). By plotting sensitivity against 1 - specificity across various threshold settings, the ROC curve shows how well the model distinguishes between classes, with a curve closer to the top-left corner indicating a more accurate model. The area under the ROC curve...
280
Design Example: Underdamped Parallel RLC Circuit
328
Consider designing an oscillator circuit, a crucial component in various electronic devices and systems. The objective is to create an oscillator circuit with specific characteristics: a damped natural frequency of 4 kHz and a damping factor of 4 radians per second. To accomplish this, a parallel RLC circuit is employed, known for its ability to sustain oscillations at a resonant frequency. In this case, the damping factor is pivotal in achieving the desired performance.
Starting with a fixed...
Starting with a fixed...
328
Linear time-invariant Systems
285
A system is linear if it displays the characteristics of homogeneity and additivity, together termed the superposition property. This principle is fundamental in all linear systems. Linear time-invariant (LTI) systems include systems with linear elements and constant parameters.
The input-output behavior of an LTI system can be fully defined by its response to an impulsive excitation at its input. Once this impulse response is known, the system's reaction to any other input can be...
The input-output behavior of an LTI system can be fully defined by its response to an impulsive excitation at its input. Once this impulse response is known, the system's reaction to any other input can be...
285

