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polyphase

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polyphase adj.【電學】多相的。 a polyphase dyn...

adj. 【電學】多相的。 a polyphase dynamo [motor] 多相發電[電動]機。 “polyphase alloy“ 中文翻譯：   多相合金“polyphase alternator“ 中文翻譯：   多相交流發電機“polyphase circuit“ 中文翻譯：   多相電路“polyphase converter“ 中文翻譯：   多相變流機; 多相換流機“polyphase current“ 中文翻譯：   多相電流“polyphase deformation“ 中文翻譯：   多相變形“polyphase equilibrium“ 中文翻譯：   多相平衡“polyphase generator“ 中文翻譯：   多相發電機“polyphase heating“ 中文翻譯：   多相加熱“polyphase liposome“ 中文翻譯：   多相脂質體“polyphase liposomes“ 中文翻譯：   多相脂質體“polyphase liposomine“ 中文翻譯：   多相油酸酯質體“polyphase machine“ 中文翻譯：   多相電機“polyphase merging“ 中文翻譯：   多步合并; 多相合并“polyphase metamorphism“ 中文翻譯：   多相變質作用“polyphase meter“ 中文翻譯：   多相測試儀表; 多相電度表; 多相計數器; 多相儀表“polyphase meygc“ 中文翻譯：   多段歸并法“polyphase microinstruction“ 中文翻譯：   多步微指令“polyphase microstructure“ 中文翻譯：   多相顯微組織“polyphase motor“ 中文翻譯：   多相電動機“polyphase network“ 中文翻譯：   多相網絡“polyphase oscillation“ 中文翻譯：   多相振蕩“polyphase power“ 中文翻譯：   多相功率“polyphase wound“ 中文翻譯：   多相纏繞的“polypharmacy“ 中文翻譯：   多藥療法; 復方“polyphase alternating current“ 中文翻譯：   多相交流電流

polyphemus

In this thesis , complex analytical band - pass filtering based method is proposed to reduce the modulation complexity ; polyphase decomposition is used to reduce the filtering complexity ; uniform dft filter banks based method exploits the center frequency distribution characteristic of filter banks to reduces the modulation and spectral resort processes 而基于均勻dft濾波器組的算法充分利用了濾波器組的中心頻率的分布特點，省略了復頻移環節和整序環節，同時利用多相分解的方法改善了濾波環節，兼有各種方法的優點而大大的提高了算法的實時性。

The main contents of this thesis include : 1 . introducing basic theory and architecture of digital receiver and summarizing various key algorithms such as cordic , da , polyphase filtering , etc , that are used by different function units , this dissertation proposes an architecture based on fpga implementation and corresponding performance analysis 本文的主要內容為: 1 、首先介紹了數字接收機的基本理論和結構,對完成各級數字信號處理所涉及到的cordic 、分布式算法( da ) 、多相濾波等關鍵算法做了適當介紹和分析。

Note that we achieve this goal at expense of numerous computation and frequent memory i / o . actually , it is not feasible to put so much workload on scaling which is only a subsection of whole transcoder . through polyphase decomposition of fir filter , we can avoid a mass of redundant computation and decrease memory i / o 所以在基于軟件的實現時，我們必須設計更加巧妙的濾波結構從而減少不必要的運算，通過對各種結構的對比和試驗，發現基于fir的多相濾波器結構能夠滿足我們的要求，通過對fir濾波器的分解，我們可以省去大量的不必要計算和內存i o ,從而可以節約很多時間但保證圖像質量毫無損失。

Because of the high space correlation among four descriptions , the coding method is very robust but unpractical . in this paper , a new multiple description video coding algorithm , called prediction - based spatial polyphase transform ( pspt ) multiple description video coding , is proposed to promote the error resilient ability and reduce the computational complexity of the h . 264 coder 本文在空間多相變換基礎上引入子序列間的預測,提出了一種新的基于h . 264的多描述視頻編碼算法? ?基于子序列間預測的空間多相變換多描述視頻編碼,提高了空間多相變換多描述編碼的效率。

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準則與平方根升余弦濾波器、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、網絡結構的等效結構、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) 、分布式算法、 cic濾波器、直接數字頻率合成( dds ) 、 cordic算法。

Later on we discuss the basic theory of multi - rate signal processing , and the polyphase algorithm for interplation filter , then produce the efficient algorithms for interplation : half - band filter and cic filter . we analyze their computing quantity and performance , especially the mirror elimination feature and the at - tenuation in the passband 之后討論了多速率信號處理的基本理論,比較了不同的內插算法,分析了半帶濾波器和cic內插濾波器的計算代價、時頻性能,以及各自的抑制鏡像特性。

Consulting relevant reference and related theories in software radio , this thesis is working on technologies of digital channelized receivers , including the theories on a / d sampling , digital down converter , multi - velocity signal processing , polyphase filter and uniform dft filter bank 本文針對電子偵察系統數字化實現,對數字式信道化接收機的相關技術進行了研究:包括a / d采樣的理論、數字下變頻相關理論、多速率信號處理的理論、多相結構優化抽取濾波、均勻dft濾波器組。

With high spectrum efficiency , large capacity and immunity for multipath fading , orthogonal frequency division multiplexing access ( ofdma ) technique is one of key skills in the fourth generation of mobile communication . in this paper , we discuss the basic principle of ofdma system , and propose a whole design of transceivers both in bs and in user terminal end . in the system synchronization aspect , we point out the effects of the carrier frequency offset , sampling offset , and symbol timing offset to the system , and investigate the estimation algorithms of carrier frequency offset and timing offset based on polyphase filter banks 本文闡述了ofdma系統的基本原理，給出了基站與用戶端站上的收發信機的總體設計，并針對該系統中的同步技術，指出了載波頻偏、采樣鐘偏移和符號定時偏差對該系統的影響，深入研究了基于多相濾波器組的載波頻偏和定時偏差的估計算法，針對該系統中的信道估計技術，深入研究了基于導頻符號的信道估計方法，從而提出了一系列的同步與信道估計的改進措施和新算法，本文還簡要討論了ofdma系統中的子載波、比特與功率的最佳分配算法，最后結合matlab仿真對這些算法的有效性和可行性進行了全面地分析與比較。

Integrating multirate signal processing theory and classical spectrum estimation theory , a brand new multiresolution spectrum theory is provided and a special algorithm is discussed in great detail . the polyphase decomposition theory is also applied to optimize the algorithm and improve the computing efficiency 本文結合多抽樣率信號處理理論和傳統譜估計理論，提出了嶄新的多分辨譜估計理論，并給出了具體的實現算法，解決了譜估計中如何達到頻率分辨率和時間分辨率的最佳組合的問題。

A typical spatial polyphase transform multiple description coding scheme sub - samples the input image in both horizontal and vertical directions , forming four subframes , which are coded and transported by the separate encoders , respectively , to construct four descriptions 現有的空間多相變換多描述視頻編碼算法是對輸入的圖像序列分別進行水平方向和垂直方向的下采樣,得到四個子序列。每個子序列分別通過編碼器進行編碼產生四路碼流(描述) 。

It is recommended to start with daily injection for two treatment courses and then with one injection for every two days . this scheme will provide stabilized efficiency . since compound polyphase liposome injection solution is a slow - released form , it is preferred to retain in the tumor area longer 開始施打時建議每天施打，約兩個療程后再兩天打一針，亦符合藥物的穩定性，因為本藥劑為緩釋長效劑型，所以有利于延長藥物在腫瘤區滯留的時間。

Combining with domestic and foreign literatures , the influencing factors , mechanism of polyphase interfacial interaction and their application in bio - hydrometallurgy are comprehensively introduced in view of interaction between mineral and water , microorganism and mineral , mineral and mineral 綜合國內外文獻報道，針對礦物水、微生物礦物和礦物礦物界面，較全面的闡述了多相界面作用的影響因素、作用機理及其在生物冶金中的應用。

Based on upper study deeply the efficient digital channelized architectures based dft polyphase filter banks to deduce and establish several kinds channelized digital receiver mathematic models for real signal 在此基礎上深入研究了基于多相dft濾波器組的數字信道化高效結構,推導并建立了實信號信道化數字接收機的多種數學模型。

After a detailed study on the error resilience and error concealment , a novel h . 264 based multiple description video coding scheme via special polyphase transform is proposed in this paper 本文在分析、總結了目前存在的視頻容錯編碼算法的基礎上,提出了一種基于空間多相變換的多描述視頻編碼。

Ieee signal processing magazine , 16 : 70 - 91 . 18 shekarforoush h , berthod m , zerubia j . subpixel imageregistration by estimating the polyphase decomposition of cross powerspectrum 更為重要的是，這種新方法不僅可以進行亞像素級別的精確配準，而且可以在一定程度上補償虹膜的非線性收縮運動。

Chen p . r . , chen x . m . , ni p . , wang w . c . et al . , 1997 , discovery of chalcopyrite daughter mineral in polyphase fluid inclusions from yanyuan porphyry copper deposit , sichuan province 朱金初，李人科，周鳳英，王汝成等， 1996 ,廣西栗木水溪廟不對稱層狀偉晶巖?細晶巖巖脈的成因討論。

The bio - leaching system involves polyphase interfacial interactions , such as microorganism - mineral , mineral - mineral , microorganism - solution , mineral - gas phase 摘要微生物浸出體系涉及微生物礦物、礦物礦物、微生物溶液礦物氣相等多相界面作用。

Based on the features of shaping filter , we put forward the look - up table and the polyphase algorithms . the contents in the roms are given 在此基礎上,針對成形濾波器的特點,研究了高效的查表結構和多相結構的硬件實現算法,并給出查表結構的rom表數據。

Therefore , a method in design and fpga implementation of wideband digital if receivers based on polyphase filters to fulfill decimation and filtering is proposed 本文正是基于這種目的，研究并設計了基于軟件無線電技術的中頻數字接收機的數字下變頻。