常見例句雙語例句In the fourth chapter, the model of the SAR echoed signal with stepped frequency signal is presented.第四章給出了基于頻率步進(jìn)信號的SAR回波信號模型。It obtains its high resolution in range by transmitting LFM signal and that in aspect by utilizing the Doppler information among the pulsed echoed signal.它通過發(fā)射線性調(diào)頻（LFM）的脈沖壓縮信號實現(xiàn)距離上的高分辨率，利用脈沖之間的多普勒信息獲得方位上的高分辨率。 返回 echoed signal