Abstract: Constantamplitude polynomialphase signals (PPSs) are characterized by their phase polynomial coefficients. It is usually difficult to estimate the phase polynomial coefficients for short sequence PPSs. A highorder ambiguity function and product highorder ambiguity function based PPS parameter estimation algorithm was introduced. By analyzing its performance especially in the case of the short sequence, the improvement to this algorithm was made. The MonteCarlo simulation shows that the proposed algorithm improves the estimation effect and raises the operation efficiency.

Key words: information processing technology, short sequence polynomialphase signals, highorder ambiguity function(HAF), product HAF(PHAF)