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Modeling and suppression of transmitter leakage in concurrent dual-band transceivers with carrier aggregation

In this paper, a dual-basis envelope-dependent sideband distortion model is proposed to characterize the distortion induced by transmitter leakage in concurrent dual-band transceivers. It is constructed by first generating a nonlinear basis function that maps the inputs to the target frequency band where the distortion is to be cancelled, and then weighting it with envelope-dependent nonlinearities. Experimental results demonstrated that excellent cancellation performance can be achieved with very low implementation complexity by employing the proposed model.