摘要
针对鱼雷声引信工作区域内目标回波的体目标效应对回波信号的多普勒频率估计精度的影响,提出了一种幅度比值-分段相位差联合频率估计方法(简称RP方法)。该方法将传统的Rife算法和分段相位差算法相结合,通过对所估计的信号频率进行预处理,在不同的频段采用不同的估计算法,使算法的整体性能显著提高,充分保留了两种算法的优点,同时又克服了各自的缺陷,实现了对目标回波信号多普勒频率的高精度估计。仿真结果表明,该方法估计精度高且稳定性较好,能够较好地满足鱼雷在声引信工作区域内提取目标回波多普勒频率信息,实现精确炸点预测,具有一定的工程应用价值。
Aiming at that body target effect of target echo has an impact on the estimated Doppler frequency precision of echo signal in work area of torpedo acoustic-fuze,the Rife-Segmented Phase Difference Method is proposed.The high estimation precision of echo signal＇s Doppler frequency is achieved by the method through combining the traditional Rife algorithm and the Segmented Phase Difference algorithm.It significantly improves the overall performance of the algorithm,fully retains the advantages of the two algorithms and overcomes the respective defects by the estimated signal frequency is preprocessed and different estimation algorithms are used in different frequency.Simulation result shows it can well extract Doppler frequency information of target echo in work area of the torpedo acoustic-fuze to achieve precise prediction of burst spot with high estimation precision and good stability,which has certain engineering application value.
出处
《舰船电子工程》
2015年第10期151-155,共5页
Ship Electronic Engineering
关键词
水下体目标
频率估计
Rife算法
分段相位差算法
underwater target
frequency estimation
Rife algorithm
segmented phase difference algorithm
