Abstract:

The complex correlation algorithm is often used in calculating Doppler shift of the echo.But it will lead to a big deviation from the actual value in practical application because of the interference of noise.An improved complex correlation algorithm is brought up in the article.The algorithm is enhanced in noise-processing field by presampling the signal of noise.And the result is verified through simulation experiment.Through the result,the new complex correlation algorithm can lead to a better result in calculating Doppler shift normal complex correlation algorithm.

Key words: doppler radder;doppler shift;complex correlation algorithm;noise