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The role of the constant false alarm rate circuitry is to determine the power threshold above which any return can be considered to probably originate from a target as opposed to one of the spurious sources. If this threshold is too low, more real targets will be detected, but at the expense of increased numbers of false alarms.
Since V is a random variable and is a constant (), the false positive ratio is also a random variable, ranging between 0–1. The false positive rate (or "false alarm rate") usually refers to the expectancy of the false positive ratio , expressed by E ( V / m 0 ) {\displaystyle E(V/m_{0})} .
A false alarm, also called a nuisance alarm, is the deceptive or erroneous report of an emergency, ... (see Constant false alarm rate). ...
Constant false alarm rate processing is used to examine each FFT output to detect signals. This is an adaptive process that adjusts automatically to background noise and environmental influences. There is a cell under test, where the surrounding cells are added together, multiplied by a constant, and used to establish a threshold.
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Detection theory or signal detection theory is a means to measure the ability to differentiate between information-bearing patterns (called stimulus in living organisms, signal in machines) and random patterns that distract from the information (called noise, consisting of background stimuli and random activity of the detection machine and of the nervous system of the operator).
A false alarm triggered an emergency landing for an American Airlines flight from Chicago to Las Vegas. Pete Syme. December 3, 2024 at 8:55 AM. An American Airlines Boeing 737.
Below, we're outlining the best spots to place your smoke alarm, plus expert advice on the best ways to use smoke detectors in your home. Related: The 9 Best Smoke Detectors of 2024 to Give You ...