Programming design of Digital-Down Converter based on software radio

In this paper, three projects of the Digital-Down Converter software radio receivers are discussed. On this basis, efficient and optimized concrete implementation methods about Digital-Down Converter are put forward. It replaces the specialized Digital-Down Converter hardware integrated circuits, it strengthened flexibility and adaptability in IF system. To reduce calculation, in this paper, author adopts the project of integrating abstracting with filtrating. That multiphase-decompose the filter and memorize different phases. Tests show that this project is feasible and available.