基于熵损失度的测速测距抗干扰性能评估方法

Evaluation Method for Anti-jamming Performance of Velocity and Distance Measurement Based on Entropy Loss

在跳扩频测控系统的测速、测距抗干扰性能评估中引入熵的概念。在信息准则下,以熵损失度作为评价指标,建立抗干扰性能评估模型,推导出熵的变化与干扰功率、干扰因子等参数的数学关系。仿真结果表明了熵损失度随着干噪比和干扰因子的正比例变化趋势,并且得到了不同干扰参数在一定熵损失门限下的制约关系。

The concept of entropy is introduced into evaluation for anti-jamming performance of velocity and distance measurement in DSSS /FHSS hybrid spread spectrum TT&C system,establishing an evaluation model in which entropy loss degree is used as an index under the information criterion,and deducing the mathematical relationship between entropy loss degree and parameters such as jamming power and factors. The result of simulation showed the entropy loss degree's changing trend with jamming and noise power ratio and the jamming factor,and constraint relationship of different jamming parameters under the certain entropy loss threshold was also obtained.