为了进一步改善贝叶斯检测前跟踪算法的检测性能,针对目标存在状态变量,提出了一种非齐次马尔可夫链模型.在提出的非齐次马尔可夫链模型中,目标存在状态变量的状态转移概率矩阵与当前时刻目标存在的后验概率有关,更加符合目标存在状态的转移.计算机仿真实验表明,相比于目标存在状态变量的齐次马尔可夫链模型,非齐次马尔可夫链模型能够进一步改善贝叶斯检测前跟踪算法的检测性能.
In order to improve the detection performance of Bayesian track-before-detect, this paper proposes a heterogeneous Markov chain model for target existence variable. In the proposed model, the transition probability of the target existence variable is related with the posterior probability of target existence at the current time, which is more consistent with the transitions of target existence variable. Simulation results show that the detection performance can be improved by the proposed heterogeneous model compared with the traditional homogeneous model.