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相关概念视频

Downsampling01:20

Downsampling

153
When considering a sampled sequence with zero values between sampling instants, one can replace it by taking every N-th value of the sequence. At these integer multiples of N, the original and sampled sequences coincide. This process, known as decimation, involves extracting every N-th sample from a sequence, thereby creating a more efficient sequence.
The Fourier transform of the decimated sequence reveals a combination of scaled and shifted versions of the original spectrum. This...
153
Upsampling01:22

Upsampling

227
Managing signal sampling rates is essential in digital signal processing to maintain signal integrity. A decimated signal, characterized by a reduced frequency range due to its lower sampling rate, can be upsampled by inserting zeros between each sample. This upsampling process expands the original spectrum and introduces repeated spectral replicas at intervals dictated by the new Nyquist frequency. To refine this zero-inserted sequence, it is passed through a lowpass filter with a cutoff...
227

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相关实验视频

Updated: Jun 24, 2025

Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles
11:54

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Published on: March 13, 2017

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基于LFM脉冲的分布式声学传感的步骤适应加速解调算法.

Zhongquan Chen, Junfeng Jiang, Kun Liu

    Applied optics
    |June 10, 2024
    PubMed
    概括
    此摘要是机器生成的。

    一个新的步骤适应交叉相关算法通过减少计算来加快分布式声学传感. 这项创新大大缩短了调节时间,同时确保传感系统的准确结果.

    更多相关视频

    A Simple Stimulatory Device for Evoking Point-like Tactile Stimuli: A Searchlight for LFP to Spike Transitions
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    Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
    08:39

    Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

    Published on: January 28, 2019

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    相关实验视频

    Last Updated: Jun 24, 2025

    Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles
    11:54

    Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles

    Published on: March 13, 2017

    9.3K
    A Simple Stimulatory Device for Evoking Point-like Tactile Stimuli: A Searchlight for LFP to Spike Transitions
    07:34

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    Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
    08:39

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    科学领域:

    • 信号处理 信号处理
    • 光学传感传感器是什么?
    • 数据分析 数据分析

    背景情况:

    • 分布式声学传感 (DAS) 系统对于监控至关重要.
    • 当前的DAS解调方法可能是计算密集的.
    • 线性频率调制 (LFM) 脉冲通常用于DAS.

    研究的目的:

    • 为基于LFM的DAS开发一个更快的解调算法.
    • 提高DAS数据处理的计算效率.
    • 为了保持解调精度,同时减少处理时间.

    主要方法:

    • 提出了一种新的步骤适应交叉相关算法.
    • 该算法采用了一个连续的精细化搜索策略.
    • 这种策略可自适应地调整步骤长度,以最大限度地减少计算.

    主要成果:

    • 解调时间缩短了大约15倍.
    • 拟议的算法保持了相同的解调精度.
    • 计算效率显著提高.

    结论:

    • 阶段适应交叉相关算法为基于LFM的DAS提供了实质性的改进.
    • 这种方法可以实现快速解调,而不会影响精度.
    • 该算法是实时DAS应用程序的宝贵进步.