Polyphase Digital Predistortion for Wideband PA Linearization

The predistorter divides the wideband signal into multiple polyphase components (e.g., even and odd phases) that can be processed in parallel at lower sampling rates. Each polyphase component is handled by a separate processing path, reducing the complexity of individual processing stages while maintaining overall signal linearity through coordinated recombination of the processed components.

The signal processing is segmented into multiple polyphase components that are processed in parallel at reduced sampling rates. Instead of processing the entire wideband signal at a high sampling rate, each polyphase component is processed at a lower rate, reducing the total computational load and power consumption while maintaining the same overall processing quality through the coordinated processing of all phases.

The memory requirements are segmented across multiple polyphase processing paths, each operating at lower sampling rates. The buffer memory needed for each polyphase component is smaller than what would be required for processing the entire signal at high sampling rate. The total memory usage is distributed and optimized across the parallel processing paths, reducing peak memory requirements while maintaining processing accuracy.

The polyphase decomposition segments the signal processing into parallel paths that can operate at effectively higher sampling rates for their respective phases. The segmentation allows each processing path to handle a subset of the total sampling burden, achieving high effective processing rates while keeping individual path complexity manageable through the modular polyphase structure.