统一性能分析限制干扰和无干扰双跳混合RF/FSO系统的干扰限制和无干扰的双跳混合RF/FSO系统,在指向错误的情况下进行部分继电器选择
Optics express
|February 1, 2024
概括
本研究分析了使用部分继电器选择的混合射频/自由空间光学系统. 新的公式量化干扰和指向错误的性能影响,验证系统效率.
科学领域:
- 无线通信系统无线通信系统
- 光学通信网络 光学通信网络
- 信号处理 信号处理
背景情况:
- 混合射频/FSO系统提供了更高的可靠性和容量.
- 部分继电器选择 (PRS) 和可变增益 (VG) 放大和向前 (AF) 继电器对于性能优化至关重要.
- 精确的通道建模对于分析复杂的通信环境至关重要.
研究的目的:
- 调查双跳混合RF/FSO系统与PRS和VG AF中继在干扰有限和无干扰条件下的性能.
- 开发一个通用的分析框架,用于准确的道表征.
- 为了获得系统性能指标的统一闭式表达式.
主要方法:
- 使用 κ-μ 阴影分布建模射频链接.
- 使用福克斯的H函数表示FSO链接,统一各种大气流模型.
- 模拟干扰信号具有独立的相同的 κ-μ 阴影分布.
- 导出累积分布函数 (CDF),平均位错误率 (BER) 和ergodic容量的闭式表达式.
- 提供高信号对噪声比 (SNR) 的平均BER的非对称表达式.
主要成果:
- 为CDF,平均BER和ErgodicCapacity获得了统一的封闭式表达式.
- 获得了高SNR的平均BER的非对称表达式.
- 分析量化了共同通道干扰,指向错误,继电器数量和选择的继电器排名对系统性能的影响.
结论:
- 由此产生的分析框架为研究混合RF/FSO系统提供了通用的方法.
- 数字和蒙特卡洛模拟结果验证了衍生表达式的准确性.
- 该研究为优化混合无线光通信系统的性能提供了有价值的见解.
相关概念视频
01:15Routh-Hurwitz Criterion I
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Consider an electrical power grid, where stability is essential to prevent blackouts. The Routh-Hurwitz criterion is a valuable tool for assessing system stability under varying load conditions or faults. By analyzing the closed-loop transfer function, the Routh-Hurwitz criterion helps determine whether the system remains stable.
To apply the Routh-Hurwitz criterion, a Routh table is constructed. The table's rows are labeled with powers of the complex frequency variable s, starting from the...
To apply the Routh-Hurwitz criterion, a Routh table is constructed. The table's rows are labeled with powers of the complex frequency variable s, starting from the...
244
01:19Routh-Hurwitz Criterion II
248
In the application of the Routh-Hurwitz criterion, two specific scenarios can arise that complicate stability analysis.
The first scenario occurs when a singular zero appears in the first column of the Routh table. This situation creates a division by zero issues. To resolve this, a small positive or negative number, denoted as epsilon (∈), is substituted for the zero. The stability analysis proceeds by assuming a sign for ∈. If ∈ is positive, any sign change in the first...
The first scenario occurs when a singular zero appears in the first column of the Routh table. This situation creates a division by zero issues. To resolve this, a small positive or negative number, denoted as epsilon (∈), is substituted for the zero. The stability analysis proceeds by assuming a sign for ∈. If ∈ is positive, any sign change in the first...
248
01:18Second Order systems II
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In an underdamped second-order system, where the damping ratio ζ is between 0 and 1, a unit-step input results in a transfer function that, when transformed using the inverse Laplace method, reveals the output response. The output exhibits a damped sinusoidal oscillation, and the difference between the input and output is termed the error signal. This error signal also demonstrates damped oscillatory behavior. Eventually, as the system reaches a steady state, the error diminishes to zero.
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