Abstract：PCM signal is a kind of pulse compression signal which is widely used in low probability of intercept adopting pulse compression radar system. An accurate estimation of Doppler frequency rate-of-change from received signal is a key technology in the passive locating and tracking system of single observer based on particle kinematics theory. In consideration of the in-pulse phase modulation and Doppler frequency rate-of-change’s subtleness, a fast and accurate algorithm is proposed. The influence to parameter estimation with phase modulation is dismissed by time domain correlation between neighboring pulses. Signal noise ratio is increased by frequency domain accumulation. Frequency domain correlation is used to realize phase unwrapping and enhance the Doppler frequency rate-of-change based on the coherent characteristic between pulses. This algorithm has small computation which provides well condition for application to practice. The computer simulation results demonstrate the efficiency of this algorithm.
2008, Vol. 30 
