Blocking (radio)
Encyclopedia
In radio
, and wireless communications in general, blocking is a condition in a receiver
in which an off-frequency signal (generally further off-frequency than the immediately adjacent channel) causes the signal of interest to be suppressed.
Blocking rejection is the ability of a receiver to tolerate an off-frequency signal and avoid blocking. A good automatic gain control
design is part of achieving good blocking rejection.
Radio
Radio is the transmission of signals through free space by modulation of electromagnetic waves with frequencies below those of visible light. Electromagnetic radiation travels by means of oscillating electromagnetic fields that pass through the air and the vacuum of space...
, and wireless communications in general, blocking is a condition in a receiver
Receiver (radio)
A radio receiver converts signals from a radio antenna to a usable form. It uses electronic filters to separate a wanted radio frequency signal from all other signals, the electronic amplifier increases the level suitable for further processing, and finally recovers the desired information through...
in which an off-frequency signal (generally further off-frequency than the immediately adjacent channel) causes the signal of interest to be suppressed.
Blocking rejection is the ability of a receiver to tolerate an off-frequency signal and avoid blocking. A good automatic gain control
Automatic gain control
Automatic gain control is an adaptive system found in many electronic devices. The average output signal level is fed back to adjust the gain to an appropriate level for a range of input signal levels...
design is part of achieving good blocking rejection.