DTTB的双基地雷达模糊函数及目标分辨力分析

Analysis of ambiguity function and performance of target resolution of DTTB signal in bistatic radar

通过双基地模糊函数分析比较了数字电视地面广播(DTTB)标准下单载波和多载波2种信号形式分别应用于双基地雷达的性能及目标分辨特性,研究了不同接收角度下,DTTB系统2种信号应用模式的模糊函数图,得到了双基地模糊函数形式下副峰的相对位置、产生原因以及与单基地模糊函数副峰位置的关系。分析了双基地雷达应用中DTTB信号的速度分辨力和距离分辨力,指出DTTB标准下单载波与多载波信号形式的双基地雷达分辨力大致相同,单载波形式的分辨力相对更优。

The performances of two modes of digital broadcast signals in Digital Television Terrestrial Broadcasting（DTTB） standard applied in bistatic radar are analyzed and compared by ambiguity function, as well as their target resolution characteristics. The ambiguity functions of single carrier and multi-carrier of DTTB system are studied in different receiving angles. The relative positions of secondary peaks in bistatic ambiguity functions, and the causes of secondary peaks generation are obtained. The relative relationships of the secondary peak positions between the monostatic and the bistatic ambiguity functions are obtained as well. The velocity resolution and range resolution of DTTB in bistatic radar are analyzed, and two modes of signals exhibit approximately the same resolution while the single carrier DTTB signal has better resolution.