equal signal method 中文意思是什麼
equal signal method
解釋
等信號法-
Fpga and dvb standard are introduced firstly, dvb - c standard and composition of its system are analyzed completely, development of modulator structure and dvb - c digital modulator composition are presented, more over, analysis of respective modular are given. then, principle of dvb - c digital modulator system are presented, they are error control technique 、 mqam 、 nyquist rule and root raised cosine filter 、 window design method for fir filter 、 multi - rate signal processing ( integer interpolating, conversion of fractional sampling, equal conversion of net structure, polyphase structure for filter, poly - phase structure for interpolator, multi - stage implementation of samplying conversion ) 、 distrubited algorithm 、 cic filter 、 dds 、 cordic algorithm
接著,專門利用一個章節闡述了dvb - c前端調制系統原理,他們了差錯控制技術、多進制調制( mqam ) 、 nyquist準則與平方根升餘弦濾波器、有限沖擊響應濾波器的窗函數設計法、多抽樣率信號處理包括(整數倍內插原理、分數倍抽樣率轉換、網路結構的等效結構、濾波器的多相表示、內插器的多相表示、抽樣率轉換的多級實現) 、分散式演算法、 cic濾波器、直接數字頻率合成( dds ) 、 cordic演算法。 -
At the same time, it uses a frequency translator to obtain a frequency shift, which is equal to the brillouin frequency in fiber. then the detecting pulsed light and the cw reference light can coherent. this method greatly improved the system ’ s sensitive and signal to noise ratio ( snr )
同時在探測光路中引入一個光移頻環路,使探測光移頻后再經光纖中布里淵頻移,其後向布里淵散射光頻率與參考光束大致相當,可進行相干自外差探測,大大提高了系統的探測靈敏度以及系統的信噪比。 -
Secondly, the common noncoherent - integration monopulse radar angle - measuring method is analysized in the weighting viewpoint, it is equal to the linear weighting on the result of single pulse angle measuring using signal amplitude of sum channel
採用加權的觀點分析了常規的單脈沖雷達非相參積累測角方法,指出其實質相當于對單次脈沖測角的結果用和通道信號幅度進行線性加權。
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