Adjacent Channel Rejection Ratio (ACRR) measures how effectively a receiver's filters can block out interference from an adjacent channel. It is calculated by dividing the power of the interfering signal by the power of the desired signal at the point where the receiver's performance degrades past an acceptable threshold. A high ACRR means the receiver can operate reliably even when a much stronger transmitter is broadcasting right next to its assigned band.
We need better bandpass filters on the front end because our ACRR is too low to survive next to that broadcast tower.
Also heard as
- Adjacent Channel Rejection
Related terms
ACS
A receiver measurement defining its ability to process a desired signal while rejecting strong signals on adjacent channels.
ACI
A type of signal degradation caused by energy spilling over from a neighboring frequency band.
Guard band
An intentionally unused portion of the radio spectrum placed between active channels.