Efficient Wideband Digital Predistortion for Power Amplifier Linearization

Modern digital communications signals require transmitter linearity and typically have a high Peak to Average Power Ratio (PAPR), especially for wideband modulated signals. It is desirable to transmit these wide bandwidth signals with additional fidelity allowing higher constellation orders. By adding digital predistortion (DPD) to the system we can drive the PA further into compression yet achieve a high fidelity output with greater throughput, and improved efficiency. Performing the DPD accurately, and efficiently without aliasing and adaptively are some of the big challenges. This presentation will walk through the DPD challenges and solutions for the wideband transmitters of today and the future.