次目标 meaning in English

minor heading
sub-objective

Within one single source echo , both doa and time - delay can be estimated simultaneously by this algorithm via high - resolution rotational invariance technique and high - resolution time - delay frequency ( tdf ) technique . the esprit - tdf algorithm has features of low computation , good precision , and high resolution both in doa and time - delay . it is suitable for multiple source exact localization
该方法利用高分辨旋转不变技术和高分辨时延频率技术，可在单次目标回波内实现多目标信号的方位和时延参数的高分辨联合估计，具有运算量小、分辨能力强、估计精度高等特点，能够对多目标进行高分辨精确定位。