Digital Compensation of Cross-Modulation Distortion in Multimode Transceivers

Adaptive Compensation of Inter-Band Modulation Distortion for Tunable Concurrent Dual-Band Receivers

“…From the discussions given in Section II, it is clear that the nonlinear models are bivariate polynomials of degree which can be simply denoted by (12) Thus the inverse model can be represented by (13) where and denote the inverse of and which are two bivariate polynomials of degree . In such case, the com- response will have distortions up to -th order.…”

“…One example is the emerging digital techniques for compensation of the nonlinearity of the receiver. Together with the development of high-speed low-power analog-to-digital converters (ADCs), the ideas once seemed impractical return as plausible solutions, e.g., [10]- [13].…”

“…Among these works, only a few have considered the interband modulation [12], [13]. However, the work of [12] lacks the implication in practical situations as it assumes idealized synchronization to correctly recover the reference signals.…”

“…However, the work of [12] lacks the implication in practical situations as it assumes idealized synchronization to correctly recover the reference signals. In [13], a more specific case was considered; one of the received signals was transmitted from the same terminal and thus its influence can be accurately removed. As a consequence, both of these works can be seen as special cases of the decision feedback equalizer.…”

“…The bandwidths and the center frequencies of the two signals are only required as a priori knowledge, so that the intermodulation components can be clearly defined. It is an important advantage that differs from the existing techniques [12], [13] that assume one of or both of the original signals is/are known.…”