Page 220 - Concise Encyclopedia of Robotics

Nonactive Cooperation
noise. Signals below the noise floor do not show up on the display, and
cannot be received unless some means is found to reduce the noise level
(that is, to lower the noise floor).
The noise level in a system can be minimized by using components
that draw the least possible current. Noise can also be kept down by low-
ering the temperature of all the components in the system. Some experi-
mentation has been done at extremely cold temperatures; this is called
cryogenic technology.
The narrower the bandwidth of a signal, in general, the better the
obtainable signal-to-noise ratio will be. However, this improvement takes
place at the expense of data speed.Fiberoptic systems are relatively immune
to noise effects. Digital transmission methods are superior to analog
methods in terms of noise immunity. All these factors notwithstanding,
there is a limit to how much the noise level can be reduced. Some noise
will exist no matter what technology is used.
Amplitude axis
Frequency
axis

Noise floor

Noise

NONACTIVE COOPERATION
See COOPERATION.

NOR GATE
See LOGIC GATE.

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