使用線性調(diào)頻脈沖串信號(hào)的新雷達(dá)工作模式
A NEW OPERATION MODE OF RADAR WITH LFM BURST SIGNAL
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摘要: 針對(duì)LFM信號(hào)高距離分辨率與寬帶寬的矛盾,本文提出了一種新的線性調(diào)頻子脈沖串(LFM burst)信號(hào)雷達(dá)工作模式。在回波信號(hào)處理時(shí),對(duì)其先進(jìn)行子脈沖內(nèi)匹配壓縮,再對(duì)各個(gè)子脈沖進(jìn)行脈沖間相參合成,進(jìn)一步提高雷達(dá)的距離分辨率。LFM burst工作模式在不增加系統(tǒng)瞬時(shí)帶寬的條件下,可以成倍地提高雷達(dá)的距離分辨率;相反如果雷達(dá)距離分辨率的要求不變,則可以有效降低系統(tǒng)的瞬時(shí)帶寬。本文提出并論證了LFM burst模式的工作原理,分析了它帶來的優(yōu)點(diǎn),同時(shí)還對(duì)多目標(biāo)回波和動(dòng)目標(biāo)多普勒特性進(jìn)行了討論。Abstract: In order to overcome the conflicts between high range resolution and wide bandwidth of Linear Frequency Modulated (LFM) signal, a new operating mode of radar is suggested. The radar signal is a series of LFM signal-LFM burst. When the echoes return, every burst was compressed with matched filter first. Integration was accomplished later among these bursts to improve the range resolution. LFM burst mode can raise the radar range resolution several times without widening the system bandwidth. On the other han...
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