lpi low probability of intercept 中文意思是什麼
lpi low probability of intercept
解釋
信號攔截機率低，低截獲概率- lpi : 每英寸行數
- low : adj 1 低的；淺的，矮的。 low flight 低飛。 a low temperature 低溫。 low tide [water] 低潮。 The g...
- probability : n 1 或有；或然性。2 【哲學】蓋然性〈在 certainly 和 doubt 或 posibility 之間〉。3 【數學】幾率，...
- of : OF ＝Old French 古法語。
- intercept : vt 1 攔截，截擊（敵軍），截斷（光、熱、水等），阻止，中止。2 竊聽，偵聽。3 交切，相交，交叉。4 【...
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Frequency - hopping ( fh ) is a novel spread spectrum communication technique, which develops very fast in military field due to its lpi / lpd ( low probability of intercept / detection ) properties and immunity against interferences, the extensive application of hf ( high frequency ) frequency - hopping radios in military has greatly enhanced the ability of military equipments against jamming and interception and brought up a new austere challenge for communication countermeasures
跳頻通信具有良好的抗干擾性，低截獲概率及組網能力，因此跳頻技術的一出現，便在軍事領域得到了極大的發展，採用跳頻技術的短波電臺在軍事通信中得到了廣泛應用，極大地提高了軍事裝備的抗截獲和抗干擾能力，向通信對抗提出了嚴峻的挑戰。 -
Nowadays, the application of electronic support measure ( esm ) receivers, radar warning receivers ( rwr ) and especially arm forms a serious menace to radar ' s existence and the low probability of interception ( lpi ) radar just appears under this circumstance. lpi radar attempts to use various techniques to make radar signal not be intercepted by intercept receivers
現代電子支援偵察（ esm ）接收機和雷達告警接收機（ rwr ）尤其是反輻射導彈（ arm ）的應用對雷達的生存構成了嚴重的威脅，低截獲概率雷達正是在這種環境下提出的一種新體制雷達，它試圖採用各種可能的技術來避免雷達信號被截獲接收機所截獲。 -
We analyzed the anti - jam and band inside anti - interfere performance of the system, and the low probability intercept ( lpi ) of the traditional direct sequence spread spectrum ( dsss ) modulations in the uav platform ' s applications. so a new modulation technique using a multi - level pseudo noise ( pn ) code has been presented. the new multi - level pn code is built from a high speed pn code through a low passed filter ( lpf )
分析了系統抗阻塞式干擾和抗帶內頻帶干擾的性能，以及常規bpsk qpsk - dsss調制在無人機通信中存在的安全隱患，提出了一種用多電平pn碼進行擴頻調制的方法：採用高速pn碼，經過低通濾波器，產生多電平pn碼進行直序擴頻調制，能在低信噪比情況下有效抵抗平方率檢測器對系統載波的檢測。 -
The techniques of low probability of intercept ( lpt ) are developing rapidly, and are used widely in radar and communication. in order to counteract the lpi techniques, there is necessary to research the new methods of detection and estimation of lpi signals
目前低截獲概率（ lpi ）技術發展迅速，並在雷達和通信中獲得廣泛應用，為對抗這些技術帶來的檢測和估計問題，需要研究低截獲概率信號檢測和估計的新方法。 -
The low probability of intercept ( lpi ), the ability in super - resolution and anti - jamming of ultra - wide band radar challenge to the traditional receivers
超寬帶雷達具有低截獲性及抗偵察、抗干擾、抗摧毀等性能，對傳統的偵察體制提出了巨大的挑戰。 -
The main work of this dissertation can be summarized as follows. 1 、 the low probability of intercept ( lpi ) of uwb radar is analyzed based on the radar equation and reconnaissance equation. the necessity of making reconnaissance of uwb signal in the circumstance of low or negative snr is proved
本文主要工作如下: 1 、從超寬帶雷達方程和偵察方程出發，分析了超寬帶雷達信號的低截獲特性，證明了超寬帶雷達信號的偵察和參數估計在低信噪比條件下的必然性。 -
Frequency - hopping ( fh ) is a novel spread spectrum communication technique, which develops very fast in military field due to its lpi / lpd ( low probability of intercept / detection ) properties and immunity against interferences, the extensive application of hf / vhf ( high frequency / very high frequency ) frequency - hopping radios in military has greatly enhanced the ability of military equipments against jamming and interception and ensure the safety and validity of chain of military command
跳頻技術是擴頻技術的一種，是80年代以來出現的一種新的通信方式。跳頻通信具有良好的抗干擾性，低截獲概率及組網能力，因此跳頻技術的一出現，便在軍事領域得到了極大的發展。採用跳頻技術的短波超短波電臺在軍事通信中得到了廣泛應用，極大地提高了軍事裝備的抗截獲和抗干擾能力，保證了軍事指揮系統的安全和有效性。 -
With multi - modulation, the disadvantages of single - modulation ( such as fsk, psk and ppm ) can be eliminated. by taking the advantages of different modulations, the performance of range resolving, doppler resolving and low probability of intercept ( lpi ) of the signal can be improved
復合調制信號可以克服單一信號調制形式（如fsk 、 psk 、 ppm等）的缺點，實現信號之間的取長補短，提高距離、速度分辨力，提高信號的低截獲概率（ lpi ）性能，是雷達理論與技術的發展方向。
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