MATLAB Implementation of Digital Receiver with Multi-Phase Channelization and DDC

This document presents my independently developed digital receiver implementation comprising three core MATLAB programs: a comprehensive digital receiver system, a multi-phase channelized receiver, and a Digital Down Converter (DDC). These specialized programs were architectured specifically for digital signal reception applications, featuring high flexibility and customizability to efficiently process diverse signal types while ensuring accurate reception outcomes. The implementation employs sophisticated signal processing algorithms including polyphase decomposition for efficient channelization, with the DDC module incorporating cascaded integrator-comb (CIC) filters followed by FIR compensation filters for optimal sample rate conversion. The multi-phase channelized receiver utilizes Fast Fourier Transform (FFT)-based filter banks for simultaneous multi-channel signal processing, while the main receiver core implements advanced synchronization algorithms including timing recovery and carrier phase locking. Through rigorous design methodology and performance optimization, these programs demonstrate exceptional computational efficiency and real-time processing capabilities. The modular architecture allows for seamless parameter adjustments and algorithm modifications, making them ideal for both research and practical applications in digital communications. These implementations have significantly advanced my understanding of digital signal analysis and provided crucial support for my research and practical work in this field.