Software Implementation Technology in Digital Down Converting Process
Li Li · Telecommunication Engineering · 2002
The main purpose of this paper is to analyze the efficient algorithm of DDC, so that the DDC process can be implemented in software on general purpose DSP and can afford greater flexibility. Combining mixing with decimating and filting can greatly reduce the amount of operations. A decimation filter for DDC is proposed and proved to be effective by simulation. The proposed decimation filter is a cascade of a CIC filter, an ISOP(Interpolated second-order polynomials), and an FIR filter.