脈沖載波系統 的英文怎麼說
中文拼音 [màichōngzǎibōxìtǒng]
脈沖載波系統
英文
pulsed carrier current system- 脈 : 脈名詞1. (動脈和靜脈的統稱) arteries and veins2. (脈搏的簡稱) pulse 3. (像血管的組織; 連貫成系統的東西) vein
- 載 : 載Ⅰ名詞(年) year : 一年半載 six to twelve months; six months to a year; 三年五載 three to five ...
- 波 : Ⅰ名詞1 (波浪) wave 2 [物理學] (振動傳播的過程) wave 3 (意外變化) an unexpected turn of even...
- 系 : 系動詞(打結; 扣) tie; fasten; do up; button up
- 統 : Ⅰ名詞1 (事物間連續的關系) interconnected system 2 (衣服等的筒狀部分) any tube shaped part of ...
- 載波 : signal carrier; carrier wave; carrier: 3路載波 three channel carrier載波傳輸 carrier transmission...
- 系統 : 1. (按一定關系組成的同類事物) system 2. (有條理的;有系統的) systematic
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The conventional sphere model of earth and circle model of orbit are discarded, and the ellipsoid model and the ellipse model are selected for further research, which achieves a method to determine the target position through the antenna pointing direction. and the spaceborne sar system design and simulation software is brought forth. this software accomplishes sar system coefficients design for antenna area, pulse repetition frequency, signal bandwidth, downlink data rate, radar transmitter power and satellite platform yaw steering
本文從星載雷達的星地幾何關系入手,舍棄傳統星載合成孔徑雷達研究中的球地球模型和圓軌道模型,研究了在地球橢球模型和橢圓軌道模型下由雷達天線確定目標坐標的方法,並在此基礎上研製了星載合成孔徑雷達系統設計與模擬軟體,完成雷達系統天線尺寸、脈沖重復頻率、信號帶寬、雷達信號數據率、雷達發射功率、衛星平臺的偏航牽引等幾個方面的系統參數設計以及雷達多普勒特性、雷達系統模糊、雷達定位及精度的分析,最後完成雷達回波信號的模擬。It provides an active field for development of radar techniques. this dissertation is based on the project " cfar ( constant false alarm rate ) detection for airborne pd radar "
本文是結合課題「機載脈沖多普勒雷達恆虛警檢測性能研究」進行的,主要考慮如何克服地雜波影響,提高系統的檢測性能。The system can generate three - phase spwm pulses and has following characters : the range of modulation frequency is from 0 khz to 4 khz. and can be divided to 7 classes to control. the carrier frequency may be selected up to 24 khz, and can be divided to 8 classes to control ; rotational frequency is defined to 16 bits
該系統能產生三相六路正弦脈寬調制( spwm )波形;調制頻率范圍為0 4khz ,分7級控制; 16位的速度控制解析度;載波頻率分8級控制,最高可達24khz ;系統介面兼容intel系列和motorola系列單片機;該系統控制簡單、精確,易修改,可現場編程;同時具有脈沖延時小、最小脈沖刪除、過壓和過流保護功能等特點,可應用於pwm變頻調速系統的全數字化控制。The thin pulses of radio carrier wave cause currents to flow through the nervous system - the result is a remote transmission ; no wires or contact is needed
這個細微的脈沖載波導致電流流到神經系統-結果是一個遠程的傳播,無線或聯系是需要的。The three - phase spwm pulses are generated through sine wave compared with triangular wave. during design, we make use of a changed structure of nco ( numerically controlled oscillator ) to
數字化設計是本系統的特點,系統最終生成的三相spwm脈沖是基於三相正弦調制波和三角載波比較得到的。分享友人