polyphase structure中文什么意思

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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(gè)章節(jié)闡述了dvb - c前端調(diào)制系統(tǒng)原理,他們了差錯(cuò)控制技術(shù)、多進(jìn)制調(diào)制( mqam ) 、 nyquist準(zhǔn)則與平方根升余弦濾波器、有限沖擊響應(yīng)濾波器的窗函數(shù)設(shè)計(jì)法、多抽樣率信號處理包括(整數(shù)倍內(nèi)插原理、分?jǐn)?shù)倍抽樣率轉(zhuǎn)換、網(wǎng)絡(luò)結(jié)構(gòu)的等效結(jié)構(gòu)、濾波器的多相表示、內(nèi)插器的多相表示、抽樣率轉(zhuǎn)換的多級實(shí)現(xiàn)) 、分布式算法、 cic濾波器、直接數(shù)字頻率合成( dds ) 、 cordic算法。

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