adjacent channel leakage ratio (ACLR)

Adjacent Channel Leakage Ratio (ACLR) is a term from mobile communications technology. Loosely translated, it means the ratio of the interference between adjacent channels.

Adjacent channel interference is the ratio of the transmit power of a radio channel to the transmit power of the immediately adjacent radio channel. This parameter used to be called Adjacent Channel Power Ratio( ACPR) and stood for the interference and interference between adjacent channels due to the ratio of transmit power.

The term Adjacent Channel Leakage Ratio was introduced by the Third Generation Partnership Project( 3GPP) in connection with UMTS, or Wideband Code Division Multiple Access(WCDMA), and stands for the transmit power of a channel that is radiated into the adjacent channel. This must be as low as possible so that the transmitted signal of the adjacent channel can still be detected correctly.