Patent ID: 7474255

Claim:
A target tracking method for a radar transmitting a frequency modulated continuous wave comprising the steps of: transmitting a transmitted signal which has a frequency modulated continuous wave to detect a target; receiving a reflected signal which has a plurality of reflected waves, the reflected waves being return waves of the transmitted signal; detecting the reflected waves and getting the reflected waves corresponding to the target; seeking a plurality of range gates corresponding to the reflected wave of the target; obtaining a range gate error by calculating the range gates based on the reflected wave of the target; obtaining a measured position of the target according to the range gate error; estimating a position and a speed of the target at a next time increment according to the position of the target at a current time; processing the speed of the target and a center frequency of the transmitted signal to get a Doppler frequency shift; and calculating a relative distance between the radar and the target using the Doppler frequency shift, a frequency difference of the frequency modulated continuous wave and the reflected wave corresponding to the target, a frequency sweep time of the frequency modulated continuous wave and a bandwidth of the frequency modulated continuous wave.