一个低复杂度的错误反格子等级器,具有相位跟踪功能,用于水下声通信
Fei-Yun Wu1, Hui-Zhong Yang2, Shengxing Liu3
1Navigation College, Jimei University, Xiamen, Fujian 361021, China.
The Journal of the Acoustical Society of America
|October 8, 2024
概括
本研究介绍了水下声学 (UWA) 通信的错误反格子等级器 (EFLE),与现有方法相比,显著降低了复杂性并提高了比特错误率 (BER) 性能.
科学领域:
- 信号处理 信号处理
- 水下通信是指水下通信.
- 适应性过是一种自适应性过.
背景情况:
- 在水下声学 (UWA) 通信中,递归最小方程 (RLS) 均等器存在很高的计算复杂性.
- 现有的自适应等分器在处理时间变化的UWA通道方面面临挑战,这会影响性能.
研究的目的:
- 为UWA通信系统提出一种新的自适应等级器,即错误反格子等级器 (EFLE).
- 为了减少基于RLS的等分器的复杂性,同时保持或提高性能.
- 通过相位跟踪,在时间变化的UWA通道中增强等效性能.
主要方法:
- 导出EFLE的递归最小方程算法,使用具有时间和顺序更新的格子结构.
- 在反射系数计算中实现错误反机制以实现数值稳定性.
- 整合相位跟踪方法,以解决在时间变化的频道中快速旋转的龙头问题.
主要成果:
- EFLE实现了与其长度线性相关的复杂性,与RLS相比显著减少.
- 模拟和海上实验表明EFLE的比特错误率 (BER) 性能优越.
- EFLE的性能优于线性复杂度等分器 (LMS变体) 和二次复杂度RLS等分器.
结论:
- 拟议的EFLE提供了一个计算高效和高性能解决方案,用于UWA通信均等.
- 在EFLE中的相位跟踪机制对于在动态UWA环境中有效等效至关重要.
- 对于具有挑战性的水下声道,EFLE代表了适应性平衡的重大进步.
相关概念视频
Phase-lead and Phase-lag Controllers
162
Understanding the working function of different types of controllers can be illustrated with practical analogies, such as adjusting a stereo's volume equalizer. Cranking up the bass involves a phase-lead controller, which functions as a high-pass filter, while increasing the treble uses a phase-lag controller, which acts as a low-pass filter. PD controllers, similar to high-pass filters, enhance the system's response to high-frequency components. PI controllers, akin to low-pass...
162
Time and frequency -Domain Interpretation of Phase-lag Control
87
Phase-lag controllers are widely used in control systems to improve stability and reduce steady-state errors. A dimmer switch controlling the brightness of a light bulb serves as a practical example of phase-lag control, gradually adjusting the bulb's brightness. Mathematically, phase-lag control or low-pass filtering is represented when the factor 'a' is less than 1.
Phase-lag controllers do not place a pole at zero, but instead influence the steady-state error by amplifying any...
Phase-lag controllers do not place a pole at zero, but instead influence the steady-state error by amplifying any...
87
Bewley Lattice Diagram
561
The Bewley lattice diagram, developed by L. V. Bewley, effectively organizes the reflections occurring during transmission-line transients. It visually represents how voltage waves propagate and reflect within a transmission line, making it easier to understand the complex interactions that occur.
561
Linear 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
Load-frequency control
132
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...
132
Linear Approximation in Time Domain
69
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,...
69


