重点提出了利用回波位置进行目标识别，以及利用3根接收天线来测角的新方法。
Then, the PCI7300 A card is used to acquire the radar echoes, and the signal is processed in time domain, focused on targets identification and false targets elimination.
检测回波能量就可获知目标物的存在、位置、大小、形状、浓度及强度。
Detection of echo energy could reveal the presence of a target and its location, size, shape, density and intensity.
蝙蝠是唯一会飞的哺乳动物，进化程度很高，能够在一片漆黑中精确定位一只飞虫的位置，并利用回波定位准确地从空中捕捉。
Bats are the only mammal capable of flying and are so highly evolved to be capable of pinpointing a single insect flying in the pitch black and plucking it out of the air using echo location.
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