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相关概念视频

Aliasing01:18

Aliasing

127
Accurate signal sampling and reconstruction are crucial in various signal-processing applications. A time-domain signal's spectrum can be revealed using its Fourier transform. When this signal is sampled at a specific frequency, it results in multiple scaled replicas of the original spectrum in the frequency domain. The spacing of these replicas is determined by the sampling frequency.
If the sampling frequency is below the Nyquist rate, these replicas overlap, preventing the original...
127
Reconstruction of Signal using Interpolation01:10

Reconstruction of Signal using Interpolation

186
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...
186

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相关实验视频

Updated: Jun 17, 2025

Simultaneous Data Collection of fMRI and fNIRS Measurements Using a Whole-Head Optode Array and Short-Distance Channels
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设计一个稀疏的传感器阵列用于声音场的重建,使用压缩等效源方法.

Yang Shen1, Chuan-Xing Bi1, Xiao-Zheng Zhang1

  • 1Institute of Sound and Vibration Research, Hefei University of Technology, 193 Tunxi Road, Hefei 230009, People's Republic of China.

The Journal of the Acoustical Society of America
|August 7, 2024
PubMed
概括
此摘要是机器生成的。

本研究引入了一种新的传感器阵列设计方法,以提高压缩等效源方法 (C-ESM) 对于声场重建的性能. 这种方法最大限度地减少了转移矩阵的连贯性,确保了使用更少传感器的C-ESM准确性.

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科学领域:

  • 声学 声学 在声学方面
  • 信号处理 信号处理
  • 阵列信号处理 阵列信号处理

背景情况:

  • 压缩等效源方法 (C-ESM) 通过将源作为等效点源建模,使得使用更少的传感器进行声场重建.
  • 传感器和同等源之间的传输矩阵中足够的不一致对于C-ESM性能至关重要.
  • 传感器阵列配置显著影响这种不连贯条件,需要优化阵列设计.

研究的目的:

  • 提出和验证一种传感器阵列设计方法,以确保有效的C-ESM所需的不一致性条件.
  • 为了最大限度地减少传输矩阵的平均连贯性在一个代框架内,以获得最佳的传感器放置.

主要方法:

  • 开发一个代框架来设计传感器阵列.
  • 将转移矩阵的平均连贯性最小化作为主要的设计目标.
  • 使用设计的传感器阵列与C-ESM用于声场重建.

主要成果:

  • 拟议的传感器阵列设计方法成功地将传输矩阵连贯性最小化.
  • 设计的传感器阵列增强了C-ESM的性能,用于声场重建.
  • 数字模拟和实验验证证证实了该方法的有效性和实用性.

结论:

  • 优化的传感器阵列设计对于实现C-ESM所需的不连贯性至关重要.
  • 开发的代方法为C-ESM应用设计传感器阵列提供了有效的策略.
  • 这项工作提供了一个实际的解决方案,以减少传感器数量来提高声音场重建的准确性.