Design Of Floating-point Operation Based On FPGA And Its Application On Radar

Floating-point (FP) arithmetic is usually used in many high accuracy calculation fields. In the past, fixing-point operation is usually used in gate circuits whose calculation precision is limited. With the rapid development of FPGA, it is possible to do FP operation in FPGA.This paper introduces the format of floating-point (FP) and fixing-point data at the beginning. Accomplish the VHDL design of floating-point(FP) arithmetic units in common use based on FPGA, including the conversion between FP data and fixing-point data, FP addition, subtraction, multiplication and division. All of them are pipeline architectures and specified in VHDL, are fully synthesizable with performance comparable to other available high speed implementations. Special emphasis is put on the application of FP data in radar. As an example, the FP operation modules are used in quadrature sampling of Intermediate Frequency (IF) signal, to show that a much higher performance can be obtained. At last the FP operation modules are used to design FP FFT processor, achieve high precision of FFT processing on FPGA.