双回波的质子密度加权 proton density-weighted ; PDW
在接收部分采用双电压比较器整形电路并结合软件设计纠正回波前沿的方法来提高测量精度。
Besides, the measurement accuracy was increased through using dual voltage comparator circuit combined with software design to correct the front of echo.
本文用弹球模型讨论了双光子三能级光子回波的形成。
The Billiard-Ball Model has been used to discuss the formation of Two-photon Tri-level Echo.
首先给出了双站SAR的回波信号模型，接着分析了方位多普勒信息。
First, the echo signal model of Bistatic SAR is given and then the analysis of the signal in Doppler domain is performed.
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