In broadband receivers employing a filter-decimation structure, digital filters demand exceptionally high computational speeds when handling high-sampling-rate inputs, posing significant challenges for practical engineering implementation. Polyphase filtering addresses this by advancing the decimation process prior to data processing, thereby substantially alleviating processing speed requirements. The fundamental principles of polyphase filtering is elucidated, a channelized reception architecture based on the methodology is developed, and a design implementation plan for the decoder in Field-Programmable Gate Array (FPGA) is presented.