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相关概念视频

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences01:17

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences

742
A pulse is a short burst of radio waves distributed over a range of frequencies that simultaneously excites all the nuclei in the sample. Upon passing a radio frequency pulse along the x-axis, the nuclei absorb energy corresponding to their Larmor frequencies and achieve resonance. This shifts the net magnetization vector from the z-axis toward the transverse plane. This angle of rotation of the magnetization vector, or the flip angle, is proportional to the duration and intensity of the pulse.
742
Fast Fourier Transform01:10

Fast Fourier Transform

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The Fast Fourier Transform (FFT) is a computational algorithm designed to compute the Discrete Fourier Transform (DFT) efficiently. By breaking down the calculations into smaller, manageable sections, the FFT significantly reduces the computational complexity involved. Direct computation of an N-point DFT requires N2 complex multiplications, whereas the FFT algorithm needs only (N/2)log⁡2N multiplications, offering a much faster performance.
The computational efficiency of the FFT becomes...
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Updated: Jun 3, 2025

Microfluidic Imaging Flow Cytometry by Asymmetric-detection Time-stretch Optical Microscopy ATOM
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对于高通量脉冲雷达系统的并行现场可编程门阵列数据处理.

Aaron D Pitcher1, Mihail Georgiev1, Natalia K Nikolova1

  • 1Electromagnetic Vision (EMVi) Research Laboratory, McMaster University, Hamilton, ON L8S 4L8, Canada.

Sensors (Basel, Switzerland)
|January 11, 2025
PubMed
概括
此摘要是机器生成的。

一种新的并行现场可编程门阵列 (FPGA) 架构使超高速超宽带 (UWB) 脉冲雷达系统成为可能. 这种设计通过将处理速度与雷达输出相匹配来消除数据丢失,每秒达到9000多个波形.

关键词:
隐藏武器检测系统 隐藏武器检测系统同等时间采样采样.现场可编程的门阵列.部分采样采样超宽带测量技术的超宽带测量技术超宽带雷达是一种超宽带雷达.

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科学领域:

  • 电气工程 电气工程
  • 计算机工程 计算机工程
  • 雷达系统 雷达系统

背景情况:

  • 目前基于FPGA的雷达的处理吞吐量很低,导致雷达接收器的数据损失很大.
  • 超宽带 (UWB) 脉冲雷达系统需要高的数据处理能力来处理高的采样率.

研究的目的:

  • 为超快速,紧,低成本的双通道UWB脉冲雷达系统提出并行FPGA架构.
  • 通过将处理吞吐量与雷达输出相匹配,克服现有的基于FPGA的雷达系统中的数据丢失问题.
  • 为了证明拟议的FPGA架构的可扩展性和多功能性.

主要方法:

  • 开发了一个并行FPGA架构,与内部UWB脉冲雷达集成,以20 GSa/s运行.
  • 在FPGA上实现实时信号处理,包括重建,平均,窗口和干扰抑制.
  • 通过以太网将数据卸载吞吐量向外部设备进行调查,利用FPGA功能来减少数据.

主要成果:

  • 实现了与雷达输出相匹配的FPGA数据处理速度,消除了数据丢失.
  • 演示了雷达系统的速度超过每道每秒9000个波形.
  • 确认了架构的可扩展性,以实现更高的采样速率和多功能性,包括双通道同步和信号增强.
  • 通过使用基于FPGA的平均和窗口来展示以太网卸载的有效数据减少.

结论:

  • 拟议的并行FPGA架构通过消除数据丢失和增加处理速度,显著提高了UWB脉冲雷达系统的性能.
  • 该架构为先进的雷达应用提供了一个可扩展,多功能和具有成本效益的解决方案.
  • 基于FPGA的数据处理和减少技术对于在雷达系统中管理高数据速率至关重要,特别是在外部数据传输方面.