Figure used to evaluate the performance an amplifier
Noise figure (NF) and noise factor (F) are figures of merit that indicate degradation of the signal-to-noise ratio (SNR) that is caused by components in a signal chain. These figures of merit are used to evaluate the performance of an amplifier or a radio receiver, with lower values indicating better performance.
The noise factor is defined as the ratio of the output noise power of a device to the portion thereof attributable to thermal noise in the input termination at standard noise temperature T0 (usually 290 K). The noise factor is thus the ratio of actual output noise to that which would remain if the device itself did not introduce noise, which is equivalent to the ratio of input SNR to output SNR.
The noise factor and noise figure are related, with the former being a unitless ratio and the latter being the logarithm of the noise factor, expressed in units of decibels (dB).[1]
^"Noise temperature, Noise Figure and noise factor".
Noisefigure (NF) and noise factor (F) are figures of merit that indicate degradation of the signal-to-noise ratio (SNR) that is caused by components in...
available noise power density (the noise is thermal noise, Johnson noise). As a numerical example: A receiver has a bandwidth of 100 MHz, a noisefigure of 1...
matched at each stage). The total noise factor can then be used to calculate the total noisefigure. The total noise factor is given as F total = F 1 +...
the definition of a system's noise factor or noisefigure. The noise factor specifies the increase in noise power (referred to the input of an amplifier)...
Active noise control (ANC), also known as noise cancellation (NC), or active noise reduction (ANR), is a method for reducing unwanted sound by the addition...
The key electrical parameters for an RF chain are system gain, noisefigure (or noise factor) and overload level.: 2 Other important parameters, related...
which a 50% detection probability is achieved Noisefigure of a radio receiver The thermoelectric figure of merit, zT, a material constant proportional...
generators are used to test signals for measuring noise figure, frequency response, and other parameters. Noise generators are also used for generating random...
as incidental noise. If the dominant noise is generated within the measuring equipment (for example by a receiver with a poor noisefigure) then this is...
Noise pollution, or sound pollution, is the propagation of noise or sound with ranging impacts on the activity of human or animal life, most of which are...
musical motif Noisefigure, in telecommunication Dance figure, an elementary dance pattern A person's figure, human physical appearance Figure–ground (perception)...
that the noise power is one hundred times larger than that caused by the source. The noisefigure in this case is 20 dB. To obtain low noisefigure the impedance...
to as Y) the noisefigure of the amplifier can be determined without having to measure the amplifier gain. Any amplifier generates noise. In a radio receiver...
Atmospheric noise is radio noise caused by natural atmospheric processes, primarily lightning discharges in thunderstorms. On a worldwide scale, there...
A noise barrier (also called a soundwall, noise wall, sound berm, sound barrier, or acoustical barrier) is an exterior structure designed to protect inhabitants...
Noise reduction is the process of removing noise from a signal. Noise reduction techniques exist for audio and images. Noise reduction algorithms may distort...
calculation of the noisefigure. For the electrical measurement method, the detected photocurrent noise is evaluated with a low-noise electrical spectrum...
array (PESA) Gain: The phase shifter amplifies while phase shifting Noisefigure (NF) Reciprocity: not reciprocal Passive: Applications: active electronically...
increasing the distance between source and receiver, decoupling, using noise barriers to reflect or absorb the energy of the sound waves, using damping...
itself will add to the noise according to its noisefigure. A number of factors affect how precise a signal is, mainly the noise present in the original...
Noise health effects are the physical and psychological health consequences of regular exposure to consistent elevated sound levels. Noise from traffic...
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