July 2003
Intermediate to advanced
576 pages
11h 51m
English
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5.5. Noise Level
The performance of an indoor radio frequency transmission system is determined by the received signal strength and the noise floor. To compute equivalent noise floor at the input of a receiver, it is necessary to know the gains or losses at different receiver stages and the receiver antenna ambient noise temperature.
5.5.1. Antenna Ambient Noise Temperature
It is critical to know the noise level at the very front end of a receiver because the signal-to-noise ratio determined there cannot be further improved by subsequent electronics. For wired communication systems, the minimum noise level is determined by the thermal temperature of electronic components at the very front end. Sometimes the noise level of the environment could ...
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