Frequency Measurement by FFT Based on FPGA

This paper proposes a method for frequency measurement by FFT IP core in FPGA. It can be used in 24GHz Doppler radar system. Currently, almost all the frequency measurement uses frequency counting by singlechip machine(SCM). This method is easy to be affected by noise and keystroke jitter. However, frequency measurement by FFT can easily avoid the effect of noise and jitter and obtain the results quickly and efficiently. Even it can obtain the data of two objects at the same time. This can improve the accuracy of blind area detection and avoid accidents effectively. The cost of the sources and price both are low to meet users' demand. It can be widely used in automotive electronics.