Polyphase sequence

A polyphase sequence is a method used in signal processing and communication systems for efficiently representing and processing signals. Specifically, it refers to the representation of a signal using multiple phase-shifted components, which are often used in contexts like multirate signal processing, digital filters, and modulation schemes. ### Key Concepts: 1. **Phases**: In a polyphase representation, a signal is decomposed into several sub-signals (or components) that correspond to different phase shifts.