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- The conventional adaptive side lobe cancellation algorithm and eigenspace-based technique are discussed. 討論了常規自適應旁瓣對消算法(LCMVB)和基于特征空間的技術(shù)。
- Main lobe offset frequency cancellation 主瓣偏頻對消
- This paper introduces the pulse compression, side lobe cancellation, clutter suppression, pulse accumulation and CFAR of coherent Radar signal processing. 本文介紹了脈沖壓縮、旁瓣抑制、雜波處理、多脈沖積累以及恒虛警檢測等雷達信號處理技術(shù)。
- The actual-3 dB main lobe width is a bit wider than in the ideal case that neglects the element size. 結果表明:陣元寬度對主瓣半功率點(diǎn)寬度的影響非常有限,而且不同的陣元寬度造成的半功率點(diǎn)寬度之間的差異也很小。
- At last,a simulation example of main lobe clutter power for low altitude and ... 最后給出了一低空遠界理論彈道主瓣雜波功率的仿真樣例。
- Based on digital beamforming (DBF) system, this paper presents a new side lobe cancellation scheme on the receiving direction of DBF, by which the active jamming can be effectively rejected without reducing signal detection and measurement acccuracy. 提出了一種基于數字波束形成 (DBF)技術(shù)進(jìn)行副瓣對消的新方法。 與傳統的天線(xiàn)副瓣對消相比 ,該方法采用的對消函數與副瓣擬合得較好 ,因而對消剩余較小 ,而且無(wú)需大量的計算即可自適應地形成零點(diǎn) ,能很好地抑制從副瓣進(jìn)入雷達系統的干擾。
- In the Adaptive Side Lobe Cancellation(ASLC) system of general radar, the mismatched phase of transmission line between the antenna and the former of the receiver can not be ignored usually. 在常規雷達加裝的自適應旁瓣相消(ASLC)系統中，天線(xiàn)至接收機前端饋線(xiàn)部分的相位不一致性通常不可忽略。
- For short biphase codes,the main lobe to sidelobe ratio of pulse compression is low,so sidelobe suppression is necessary. 二相碼信號是一類(lèi)常見(jiàn)的脈沖編碼信號,但碼較短時(shí),匹配濾波的主副比不高,需要采用旁瓣抑制技術(shù)。
- Based on uniform line array,the sonar equation of active sonar beam main lobe and side lobe interfered by noise-jammer are presented. 研究了噪聲干擾器對魚(yú)雷主動(dòng)聲吶的對抗原理,以等間隔直線(xiàn)陣為例,分別給出了干擾器對魚(yú)雷主動(dòng)聲吶主瓣和旁瓣的干擾方程。
- The directivity of forming beam are prominent, the width of main lobe is distinct, and producing wavy plan with more powerful, which make for scanning in space. 形成波束指向性突出，主瓣寬度明顯，延時(shí)產(chǎn)生的波陣面能量較強，有利于空間掃描。
- The result reveals that small geometric focal length and large angle may decrease the -3dB focal area, and increase length to width ratio and the pressure magnitude of main lobe. 由結果得知，曲率半徑愈小張角愈大會(huì )導致燒灼面積減小、長(cháng)寬比增加以及壓力主峰值的提高。
- adaptive antenna side- lobe cancellation 自適應旁瓣相消
- Virtually LPI guide radar is a radar which stacks up against with ESM receiver of target in system detection sensitivenes,therefore in the system design it should consider the technology measures emphaticaly to ensure its antenna main lobe LPI capability. LPI制導雷達實(shí)質(zhì)上是一種從系統上與目標的ESM接收機進(jìn)行探測靈敏度較量的雷達,因此在系統設計上應著(zhù)重考慮使其天線(xiàn)主瓣LPI的技術(shù)措施。
- This method more effectively suppresses spatial nonstationary and stationary noise than the adaptive null-forming beamformer method by using a rotatable main lobe in the 2-D plane. 該方法克服了自適應零限波束形成只能抑制空間相干噪聲的缺點(diǎn),并得到可在二維平面上旋轉的波束主瓣。
- In the other hand, after pulse compression processing, the output signal's main lobe will be extended and its amplitude or phase will be modulated, and the range resolution will descend too. 由于信號帶寬的損失，脈壓輸出回波信號的主瓣展寬，距離分辨力下降；另外，主瓣幅度或相位還會(huì )受到調制。
- Simulation results show that with 13 unit lasers, a beam with the flatness of less than 1% in the optimizing region can be achieved.The main lobe contains over 95% of the total power. 計算結果表明：13個(gè)單元光源所合成的遠場(chǎng)光束可在優(yōu)化區域內達到平坦度小于1%25，對應主峰包含95%25以上的總能量。
- In this paper, a robust adaptive beamformer in the presence of array imperfections is presented by improving the block matrix of the generalized side lobe canceller. 該文通過(guò)對廣義旁瓣相消器的阻塞矩陣加以改進(jìn),提出了一種對陣列天線(xiàn)誤差有良好穩健性的自適應波束形成器。
- IJF coding refers to converting digital baseband signal into Intersymbol Interference and Jitter Free baseband signal.It has the features of narrower spectral main lobe and faster roll off. IJF編碼是一種將基帶信號轉換為無(wú)符號間干擾和抖動(dòng)的信號，其主瓣窄，頻譜滾降快。
- The main impediment to growth is a lack of capital. 影響發(fā)展的主要障礙是缺乏資本。
- Crowds thronged the main square of the city. 城里的大廣場(chǎng)上擠滿(mǎn)了人群。
