Modification and digital implementation of FAM algorithm for spectral correlation

To improve the estimation efficiency of spectral correlation and decrease its computational complexity, it was presented that FFT and correlation of FAM are replaced by modified sliding FFT and one-bit correlation. Its closed expression of complexity is given by virtue of real multiplication and real addition. And methods of digital implementations and corresponding process are provided. According to all the above ideas, modified FAM algorithm is realized in the hardware platform. Theoretical analysis and simulation results proved that modified FAM could save much memory and time, and spectral correlation of signal could be estimated using the presented modified FAM real time.