...离远大于阵列孔径,入射信号为平面波波前,所以信号到达各阵元(接收传感器)的时延差与距离无关,利用常规的延时-相加(delay-and-sum)波束形成可以确定目标的方位,并有多种快速算法实现。为了提高被动作用距离,拖曳线列阵声纳
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The fact of having already utilized it will allow me to shorten my argument and to sum it up without delay in a particular example.
事实上，因为我们已经采用了这种方面，论述也会就此而缩短，我们只需要用一个特殊的例子便能加以总结。
Photonic RF phase shifters based on OTTD (optical true time delay), heterodyne mixing technique and vector sum technique were introduced. The principles and features were proposed and analyzed.
介绍了基于光实时延迟线、基于外差混频技术和基于矢量和技术的光子射频移相器，对其工作原理和技术特点作了分析。
The sum of forward and backward delays of different packets is regarded as one packet's'round-trip delay'.
把不同分组在两个方向上经历的最小时延之和看成是同一个分组经历的“往返时延”。
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