Radio Receiver Basics
Before one can deal with EMI to radio receiver systems, it helps to understand a little about how such systems work. From that information, strategies for EMI mitigation and elimination can be devised. In this chapter you will find the basic theories of radio receiver design, their specifications, and how EMI can affect the system.
SIGNALS, NOISE, AND RECEPTION
No matter how simple or fancy the system may be, the basic function of a radio receiver is the same: to distinguish signals from noise. The concept “noise” covers both man-made and natural radio-frequency signals. The man-made signals include all signals in the passband other than the one being sought.
In communications systems the signal is some form ...
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