For even values of n distortion components consists of DC component.
So in case of strong distortion this component may get multiplied with the desired
signal resulting in lowering of the average gain of the receiver.
Presence of a strong interference with weak signal can result in cross modulation.
In this scenario the amplitude of interference gets transferred to amplitude of weak
signal. This generally results in second order intermodulation components.
These are unintended signals generated by the receiver without receiving any input
Gain control circuitry is used to control the quality of input signal over a wide
range of input signal levels.
Main source of noises
Thermal Noise (N= kTB):
This kind of noise is generated in resistors due to agitation of charge carriers.
This random generation of current due to agitation of charge carriers results in
random voltage which causes thermal noise.
There are primarily two conditions which causes Shot noises in the system.