Design and implementation of Discrete Fourier transformation modulated filter banks based on poly-phase filter structure with near perfect reconstruction

In modern warfare of the complex electromagnetic environment, varieties of communications, radar and other interference signals accumulate with high density. So the receiver with large instantaneous bandwidth, high sensitivity and multiple signals simultaneously processing characteristics is required. Poly-phase filter structure can not only reduce system complexity, but also process the channel data parallelly and improve the system efficiency. Discrete Fournier transformation(DFT) modulated filter banks with near perfect reconstruction(NPR) solve the problem of unknown signals across the channels. Using the FPGA as the core chip, the design of eight reconfigurable channelized receiver is completed to combine the poly-phase filter and DFT modulated filter banks. Then do the simulation by the softwares of ISE13.3, Modelsim10.1 and Matlab2010. The system simulation results meet the design requirement and show its engineering application value.