CIRCUIT AND METHOD FOR FILTERING ADJACENT CHANNEL INTERFERERS

摘要

A circuit and method for filtering adjacent channel interferers. One embodiment of an adjacent channel filtering circuit for reducing adjacent channel interference with an in-band signal, includes: (1) a radio frequency (RF) circuit configured to receive and down-convert an RF signal to a baseband signal containing an in-band signal and adjacent channel components, (2) a controlled single pole filter electrically coupled to the RF circuit and configured to reject the adjacent channel components and cause a predetermined attenuation in the in-band signal, (3) a baseband circuit coupled to the controlled single pole filter and configured to condition the baseband signal for conversion to a digital signal, and (4) a digital circuit coupled to the baseband circuit and configured to receive the digital signal and compensate for the predetermined attenuation.

主权项

1. An adjacent channel filtering circuit for reducing adjacent channel interference with an in-band signal, comprising:
a radio frequency (RF) circuit configured to receive and down-convert an RF signal to a baseband signal containing an in-band signal and adjacent channel components; a controlled filter electrically coupled to said RF circuit and configured to reject said adjacent channel components and cause a predetermined attenuation in said in-band signal; a baseband circuit coupled to said controlled single pole filter and configured to condition said baseband signal for conversion to a digital signal; and a digital circuit coupled to said baseband circuit and configured to receive said digital signal and compensate for said predetermined attenuation.