Pulse repetition interval (PRI) transform and its improved algorithms are the classical algorithms in radar sig-nal sorting area. With the signal environment getting more and more complex, radar signals with different modulation over-lap seriously and the PRI distribute in wide ranges. In addition the pulse jitter is serious, the traditional method of sorting capability has been greatly reduced and even it will be sorted wrong. In response to these problems, further improvement should be applied in traditional improve algorithms. We propose a new sorting method which use the intra-pulse characterist-ics to separate pluses beforehand, which greatly reduces the complexity of the signal. It is possible to adapt the jitter prob-lems and wide range PRI values questions in radar signal sorting and verified the validity of the new algorithm by computer simulation.%脉冲重复间隔(PRI)变换及其改进算法是雷达信号分选领域的经典算法.随着信号环境的日益复杂,不同调制的多种雷达信号,具有交叠严重,PRI分布范围广的特点,加上脉冲抖动现象严重,使传统算法的分选能力大大减弱,甚至会出现分选出错现象.针对上述问题,对改进的传统算法进一步改进,提出一种新的变换分选算法,新方法利用脉冲的脉内特征进行脉冲预分离,大大降低了信号的复杂程度,能够适应PRI值分布在较大范围内的抖动雷达信号分选问题,并通过模拟仿真验证新算法的有效性.
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