Wideband DDC Based on Polyphase Structrue and Its FPGA Implementation
Peng Zhang · Shuju caiji yu chuli · 2004
The great gap between the high-speed data flow from A/D converter and low-speed of DSP is a bottleneck limiting the study of radar digital receiving system. The polyphase filter structure of the wideband digital down conversion (DDC) is deduced from the structure of the conventional digital downconverter. Its channels are 50% overlapped. It can realize the high speed and efficient filtering by using the parallel structure and only calculate the decimated data,thus improving the operational efficiency and realizability. The correctness and the validity are proved by the computer simulations and the field programming gate array (FPGA) implementation.