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Related Concept Videos

Echo01:06

Echo

The human ear cannot distinguish between two sources of sound if they happen to reach within a specific time interval, typically 0.1 seconds apart. More than this, and they are perceived as separate sources.
Imagine the sound is reflected back to the ears. Assuming that the source is very close to the human, the difference between hearing the two sounds—the emitted sound and the reflected sound—may be more than the minimum time for perceiving distinct sounds. If this is the case, then the...
Difference from Background: Limit of Detection01:05

Difference from Background: Limit of Detection

The limit of detection (LOD) is the smallest amount of analyte that can be distinguished from the background noise. The LOD value corresponds to the concentration at which the analyte signal is three times larger than the standard deviation of the blank signal. Below this value, the analyte signal cannot be differentiated from the background noise. It is calculated by dividing the calibration slope by 3 times the standard deviation of the blank signals.
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Receiver Operating Characteristic Plot01:15

Receiver Operating Characteristic Plot

A ROC (Receiver Operating Characteristic) plot is a graphical tool used to assess the performance of a binary classification model by illustrating the trade-off between sensitivity (true positive rate) and specificity (false positive rate). By plotting sensitivity against 1 - specificity across various threshold settings, the ROC curve shows how well the model distinguishes between classes, with a curve closer to the top-left corner indicating a more accurate model. The area under the ROC curve...
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Electromagnetic waves are consistent with Ampere's law. Assuming there is no conduction current Ampere's law is given as:

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Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
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Published on: March 20, 2017

Error performance bounds for two receivers for optical communication and detection.

E A Bucher

    Applied Optics
    |February 2, 2010
    PubMed
    Summary
    This summary is machine-generated.

    This study evaluates receiver strategies for optical detectors, providing error probability bounds for optical communication and signal detection in background light using photoelectron emission statistics.

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    Wideband Optical Detector of Ultrasound for Medical Imaging Applications

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    Area of Science:

    • Optical communication systems
    • Photon detection and signal processing

    Background:

    • Optical detectors rely on photoelectron emissions, which follow Poisson statistics.
    • Understanding error probabilities is crucial for reliable optical communication and signal detection.

    Purpose of the Study:

    • To evaluate receiver strategies for photoelectron emitting optical detectors.
    • To derive upper bounds on error probability for pulse position modulation and pulsed signal detection in background light.

    Main Methods:

    • Utilizing Poisson statistics of photoelectron emissions.
    • Deriving analytical upper bounds on error probability.

    Main Results:

    • Developed simple, easily evaluated, yet tight upper bounds on error probability.
    • Demonstrated the effectiveness of derived bounds for specific optical communication and detection problems.

    Conclusions:

    • The derived bounds offer insights into fundamental principles of optical communication receiver design.
    • These principles are essential for optimizing performance in noisy optical environments.