中文说明：用PHD算法实现的多目标跟踪模拟。可运行。概率假设密度（PHD）滤波，他将多个目标的状态和观测用随机集进行表示，然后代入贝叶斯滤波的迭代中，这样就避免了状态和观测之间的关联，使得多目标跟踪技术发生了重要变革。
English Description：
PHD multi target tracking algorithm is used to simulate. To run. Probability hypothesis density (PHD) filter, his State and measurement of multiple objectivesSet, then substituting into the iteration of Bayesian filtering, thus avoiding State and observing the relationship betweenMakes multiple target tracking technology has undergone great changes.