multilevel modulation 中文意思是什麼
multilevel modulation
解釋
多級調制- modulation : n 調整，調節；（聲調的）抑揚，變化；【音樂】轉調，變調；【無線電】調制。 amplitude modulation 振...
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Research on topology and modulation for hybrid cascade multilevel converters
混合級聯多電平變換器拓撲與調制策略研究 -
Based on the existent theory and the engineering application, the thesis study the good performance by combined the adaptive modulation technology and the multilevel modulation technology on the simulink model. experiment results show that this combination bring on the high data transmittable efficiency and the well transmission quality. this chapter is a base of next chapter
根據已提出的基本理論，論文基於工程應用，在模擬模型上對自適應調制和多元調制方式的結合所產生的優良的性能進行了探討，模擬顯示出這種結合帶來的高數據傳輸效率和大的傳輸質量改善，本章是第三章的基礎。 -
Bandwidth efficient multilevel coded modulation system based on ldpc codes is described in the last part of this thesis. furthermore, the designing method of combining component code rate and degree distribution is introduced
介紹了ldpc碼的多層編碼調制系統中，分量碼碼率與度序列分佈聯合最優的設計準則，並給出了相應的理論分析。 -
Laser power modulation for multilevel optical data storage based on photochromism
光致變色多階光數據存儲中激光功率的調制 -
Based on the communication engineering application, several practical problems been discussed after introducing multi - carrier adaptive multilevel modulation principle. in thesis, alterable channel model been designed and realized dynamic choosing modulated method aggregate to subchannel, and theoretic analysis and computer simulink keep consistent
本章在詳細介紹多載波自適應多元調制原理的基礎上討論了通信工程中的幾個實際問題，構造了變化的通道模型並基於此實現子通道調制方式集的動態選擇，模擬結論與理論分析一致。 -
The new standpoint that ip - iq detecting method based on three - phase three - wire system can be directly used in three - phase four - wire system is presented and proved. generalized harmful currents compensation based on multilevel converter and multi - band hysteresis pulse width modulation with timer are presented
提出並證明了基於三相三線制系統的ip - iq檢測法可直接用於不平衡三相四線制系統有害電流的檢測，無需事先剔除零序電流的新觀點。 -
Multi - carrier adaptive multilevel modulation technology maybe regards as a kind of transform combination by n single - carrier adaptive multilevel modulation technology approximatively. multi - carrier transmission can improve performance of the attenuation consumedly but single - carrier transmission ca n ' t
多載波自適應多元調制可以近似看成由n個單載波多元調制的變換組合，但由多載波傳輸對衰落的改善是單載波傳輸所不能比擬的。 -
Chapter 3 studied the results that come from the combination of the multi - carrier transmission technology and the adaptive multilevel modulation technology in detail, and bringed up to apply the technology to wireless channel transmission. the feasibility and advantage been testified by computer simulink
第三章詳細討論了多載波傳輸和自適應多元調制相結合的效果，提出將這種技術應用於無線通道傳輸的想法並模擬證明其可行性和優越性。 -
A serially concatenated iterative scheme ( bpcm - id ) combining low - density parity - check codes ( ldpc ) with multilevel modulation is proposed. differ from other serially concatenated iterative decoding schemes, the whole iterative process of bpcm - id is divided into outer iteration and inner iteration to avoid too much errors feedback to the demapper which may cause severe degradation of decoding performance
論文提出了一種新的多級ldpc碼的概念、基本特性、構造準則和搜索演算法，給出一種融合mlc / bicm的聯合編碼調制系統框架，與傳統mlc系統區別在於用一個多級ldpc碼取代多個分量碼。 -
Chapter 2 is detailed to introduce the realization principle of the adaptive multilevel modulation and its deciding threshold of choosing modulated method aggregate under the single channel, and discussed some main parameters that have great impact to modulation performance
論文第二章詳細介紹了單個通道條件下自適應多元調制方式的實現原理及其選擇調制方式集判決門限的確定，同時對調制性能影響較大的幾個重要參數進行了分析。
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