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[求助]
將一段中文翻譯成英語 急急急！�。�
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中文： 受到發(fā)射功率的限制和墻體衰減的影響，接收到的目標回波信號非常微弱，幾乎被完全淹沒在背景雜波和噪聲之中。為了增加回波信號的平均功率，可通過增加脈沖重復頻率或發(fā)射均勻脈沖串等方法來實現。然而，增加脈沖重復頻率會減小無模糊的探測距離。此外，如果發(fā)射均勻間隔的脈沖串，能量會集中在離散的諧振頻率處，在整個帶寬范圍內，這會降低雷達的距離分辨率。如果脈沖序列被隨機信號調制，所產生的類似噪聲的信號作為探測信號可以解決上訴的問題。 我的翻譯： Limited by the transmit power and wall attenuation, the echo signal from the target is very weak and submerged in the background clutter and noise. Increasing the pulse repetition frequency or transmitting a uniformly spaced pulse train can enhance the power of the echo signal. However, the increase of the pulse repetition frequency will cause the decrease of the unambiguous detection distance. In addition, if a uniformly spaced pulse train were transmitted, the energy would be concentrated at discrete harmonic frequencies within the total bandwidth, which will reduce the distance resolution of the radar. If the pulse trains are modulated by the random signal, the generated noise-like signal as the probe signal can solve the above problems |
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滄海逍遙: 金幣+50, 翻譯EPI+1, ★★★★★最佳答案 2015-06-12 08:32:22
滄海逍遙: 金幣+50, 翻譯EPI+1, ★★★★★最佳答案 2015-06-12 08:32:22
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The echo signal from the target is very weak and submerged in the background clutter and noise due to the transmit power limit and wall attenuation. The power of the echo signal can be enhanced by increasing pulse repetition frequency or transmitting a uniformly spaced pulse train. However, increase in pulse repetition frequency will cause a decrease in the unambiguous detection distance. In addition, if a uniformly spaced pulse train is transmitted, the energy will be concentrated at discrete harmonic frequencies within the total bandwidth, which will reduce the distance resolution of the radar. If the pulse trains are modulated by the random signal, the generated noise-like signal as the probe signal can solve the above mentioned problems. 難道后面有句話是用虛擬語氣？如果用則后面的都用，其實不需要（我給改了） |
2樓2015-06-11 11:06:45
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