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IIP2 requirements in 4G LTE handset receivers

SAW-less receivers have become the state-of-the-art architecture in multiband receivers. These receivers eliminate the SAW filter between the low-noise amplifier (LNA) and the direct-conversion mixer. Large TX leakage signals hit the mixer in full-duplex receivers which imposes challenging mixer linearity requirements. Second order intercept point (IIP2) was intensively studied in 3G receivers. In this paper, we derive the IIP2 specification for LTE receivers and report the simulated and measured correction factors needed to estimate the modulated carrier 2nd order distortion using the conventional 2-tone carrier test.