Research on the anti-noise performance of Doppler frequency estimation algorithm

The anti-noise Doppler frequency estimation algorithm was studied in this paper. This paper focuses on the complex correlation of Doppler frequency estimation algorithm, and compares the anti-noise performance of narrowband signals and broadband signals, illustrating the anti-noise performance of broadband signals is better than the anti-noise performance of narrowband signals. In addition, this paper shows the longer the length of the m-sequence is, the better is anti-noise performance. Meanwhile the anti-noise performance of Walsh sequence is better than that of m-sequence; finally, the anti-noise performance of the Gold sequence is better than that of m-sequence when both sequences are the same order; the anti-noise performance of improved Walsh sequence is better than that of the original Walsh sequence.