构建最佳的二维光学直角代码,每波长最多有一个脉冲
1School of Computer and Software Engineering, Xihua University, Chengdu 610097, China.
Entropy (Basel, Switzerland)
|September 27, 2024
概括
一种用于构建二维光学直角代码 (2D OOC) 的新方法,每波长最多为一个脉冲 (AM-OPPW),可以提高网络容量. 这些新的2D OOC支持更多的用户,并处理比现有设计更大的异步流量.
科学领域:
- 电信工程 电信工程 电信工程
- 信息理论 信息理论
- 光学网络 光学网络
背景情况:
- 光学代码分割多重接入 (OCDMA) 网络对于高速通信至关重要.
- 现有的二维光学直角码 (2D OOC) 在支持大量用户和流量负载方面存在局限性.
- 开发高效的编码方案对于提高OCDMA网络性能至关重要.
研究的目的:
- 为二维光学直角代码提出一个通用的构造,每波长最多有一个脉冲 (AM-OPPW 2D OOC).
- 证明使用新型参数生成最佳的AM-OPPW 2D OOC.
- 提高OCDMA网络的容量和流量处理能力.
主要方法:
- 为AM-OPPW 2D OOCs开发了一种全新的通用构造方法.
- 施工方法的应用是为了产生最佳的AM-OPPW 2D OOCs的特定实例.
- 业绩分析侧重于用户容量和异步流量处理.
主要成果:
- 为AM-OPPW 2D OOCs展示了一个新的,通用的构造.
- 成功生成了具有新参数的最佳AM-OPPW 2D OOC.
- 拟议的2D OOC在支持更多的用户和更重的异步流量方面表现出卓越的性能.
结论:
- 拟议的通用构造提供了一种灵活有效的方法来生成最佳的AM-OPPW 2D OOC.
- 这些新代码在OCDMA网络的现有构造上提供了显著的优势.
- 这些发现有助于推进高容量光通信系统的发展.
相关概念视频
01:26Linear Approximation in Frequency Domain
88
Linear systems are characterized by two main properties: superposition and homogeneity. Superposition allows the response to multiple inputs to be the sum of the responses to each individual input. Homogeneity ensures that scaling an input by a scalar results in the response being scaled by the same scalar.
In contrast, nonlinear systems do not inherently possess these properties. However, for small deviations around an operating point, a nonlinear system can often be approximated as linear....
In contrast, nonlinear systems do not inherently possess these properties. However, for small deviations around an operating point, a nonlinear system can often be approximated as linear....
88
01:10Reconstruction of Signal using Interpolation
179
Signal processing techniques are essential for accurately converting continuous signals to digital formats and vice versa. When a continuous signal is sampled with a period T, the resulting sampled signal exhibits replicas of the original spectrum in the frequency domain, spaced at intervals equal to the sampling frequency. To handle this sampled signal, a zero-order hold method can be applied, which creates a piecewise constant signal by retaining each sample's value until the next...
179
01:21Linear Approximation in Time Domain
70
Nonlinear systems often require sophisticated approaches for accurate modeling and analysis, with state-space representation being particularly effective. This method is especially useful for systems where variables and parameters vary with time or operating conditions, such as in a simple pendulum or a translational mechanical system with nonlinear springs.
For a simple pendulum with a mass evenly distributed along its length and the center of mass located at half the pendulum's length,...
For a simple pendulum with a mass evenly distributed along its length and the center of mass located at half the pendulum's length,...
70
01:19Routh-Hurwitz Criterion II
201
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...
201
01:17Bandpass Sampling
166
In signal processing, bandpass sampling is an effective technique for sampling signals that have most of their energy concentrated within a narrow frequency band. This type of signal is known as a bandpass signal. The key principle of bandpass sampling involves sampling the signal at a rate that is greater than twice the signal's bandwidth to prevent aliasing.
A bandpass signal has a spectrum with a lower frequency limit, denoted as ω1, and an upper frequency limit, denoted as ω2....
A bandpass signal has a spectrum with a lower frequency limit, denoted as ω1, and an upper frequency limit, denoted as ω2....
166
01:12Two-Dimensional (2D) NMR: Overview
632
The 1D NMR spectrum of large and complex molecules like natural products has complicated splitting patterns and overlapping signals, which can be easily interpreted using 2-dimensional (2D) NMR. Unlike 1D NMR, 2D NMR has two frequency axes that provide the coupling information between the nucleus A and nucleus B in a molecule. The process from which 2D spectra are obtained has four steps.
The first step is the preparation period, during which nucleus A is excited with a radiofrequency pulse....
The first step is the preparation period, during which nucleus A is excited with a radiofrequency pulse....
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