Curtailed Digital Predistortion Model for Crosstalk in MIMO Transmitters

A Modified Magnitude-Selective Affine Function-Based Behavioral Digital Predistortion for Power Amplifiers in Mimo Systems

“…(2) j0 are the model coefficients. From (7), it is clear that there are only four active coefficients used, but because there are four partitions, the total number of coefficients is 16.…”

“…However, the existence of triple summation symbols leads to a huge number of coefficients, which will consume a lot of computing resources. In [6] and [7], the models reduce the quantity of the coefficients to reduce complexity by modifying the basis functions, which can achieve approximate linearization performance at a lower number of coefficients than 2 × 2 PH. In [8], a dual-input crosstalk mismatch model (DI-CTMM) for multi-antenna transmitters has been proposed.…”

Efficient linearisation technique for crosstalk and power amplifier non‐linearity suitable for massive MIMO transmitters

“…In multi‐branch and multi‐band transmitters, predistortion is one of the most prominent techniques for linearisation of non‐linearities and digital predistortion (DPD) technique employs the existing digital signal processor of the base station's transmitter using the concept of software‐defined‐radios [6–30]. The power consumption in implementing DPD on the digital signal processor is relatively low as compared to the high power consumption of PA.…”

“…This model also accounts for the non‐linear crosstalk, which requires the same number of coefficients as COMPM and has better linearisation performance than COMPM. In [23], a less complex, curtailed DPD model has been proposed for linearisation of 22 MIMO transmitters. The linearisation performance of this model was comparable to the 22 PH model with reduced model's complexity.…”