RF front end reduction of receiver de-sensitivity

摘要

Systems and methods for reducing receiver de-sensitivity caused by coupling between a primary antenna and a diversity antenna. More particularly, the systems and methods reduce receiver de-sensitivity due to harmonic components associated with the signal transmitted by the primary antenna falling within a frequency band at which the diversity antenna is configured to sense signals. The systems and methods include amplifying a first signal to produce a transmission signal for transmission via the primary antenna; receiving, at the diversity antenna, a receive signal; amplifying, via a low noise amplifier, the receive signal to apply a gain to the receive signal; inverting the transmission signal; and adding the inverted transmission signal to the amplified receive signal to produce a corrected receive signal. Accordingly, the harmonic components introduced into the receive signal are canceled out via negative feedback at the radio frequency (RF) front end.