Behavioral modeling for polar transmitters

In this paper, we have shown that behavioral modeling is an important tool for not only predicting PA distortion performance, but is also indispensable for correcting such signal degradation in the transmit path. Digital pre-D has proven to be an effective means to suppress ACPR in base station applications, but is too costly and complex for mobile applications. Mobile PA architectures are increasing utilizing polar transmitter architectures to improve efficiency for digitally modulated signals. We have shown that the combination of polar architectures combined with digital pre-D allows high efficiency operation while still achieving adequate distortion performance. Future work will include development of multiple-input/mulitiple output (MIMO) transmitters for use in mobile platforms.