【Key words】 Vehicle radar； Collision warning； Chaotic FM； DBF； Particle filter； Non-linear/Non-Gaussian；
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连续混沌调频信号 CCFMS ; Continuous-Chaos Frequency-Modulating Signal
混沌调频信号 chaotic fm signal
变占空比混沌载频调制 CCFMVD
定占空比混沌载频调制 CCFMFD
混沌频率调制 chaotic frequency modulation
混沌调频信号类似随机信号，具有较强的抗干扰性能(ECCM)。
Chaotic FM signal is similar to random signal. It has good Electronic Counter-Counter Measure (ECCM) capabilities.
调频差分混沌键控(FM - DCSK)的比特能量是常数，可以提高传输速率，但和CS K相比较，性能上仍有差距。
The energy per bit of FM-DCSK is kept constant to increase the transmission rate. But the performance of CSK is yet better than that of FM-DCSK.
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