非選擇性衰落 的英文怎麼說

中文拼音 [fēixuǎnzháixìngshuāilà]
非選擇性衰落 英文
non selective fading
  • 非 : Ⅰ名詞1 （錯誤） mistake; wrong; errors 2 （指非洲） short for africa 3 （姓氏） a surname Ⅱ動詞1 ...
  • 選 : Ⅰ動詞1. （挑選） select; choose; pick 2. （選舉） elect Ⅱ名詞（挑選出來編在一起的作品） selections; anthology
  • 擇 : 擇動詞（挑選） select; pick; choose
  • 性 : Ⅰ名詞1 （性格） nature; character; disposition 2 （性能; 性質） property; quality 3 （性別） sex ...
  • 衰 : 衰動詞（衰弱） decline; wane
  • 落 : 落名詞[方言] （北方對蓮花落的俗稱） a kind of folk song
  • 選擇 : select; choose; opt; election; choice; culling; alternative
  • 衰落 : decline; be on the wane; go downhill; fading; decay; decaying; lapse; erode
  1. The conclusion is identified by computer simulation. the paper studies a noncoherent demodulation based on differential encoding in mc - cdma system and makes computer simulation of ber performance compared with that of coherent demodulation based on perfect channel estimation

    研究分析了一種使用差分編碼的非相干接收mc - cdma系統，對頻率選擇性瑞利衰落通道條件下的誤碼率性能進行了計算機模擬，並且和基於理想通道估計的相干解調方案進行了比較。
  2. It is based on the mean square error ( mse ) principle and we prove the validity of the method by computer simulations. to make a thorough understanding of mimo adaptive equalization system, in this thesis the author : 1 ) ananlyze the characteristics of mimo wideband channels and the modeling and simulation of 3gpp scm ; 2 ) research the capability of mimo linear adaptive equalization and mimo non - linear adaptive equalization by computer simulations ; 3 ) present a new method for selecting the order of adfe model 4 ) implement the adfe on adsp - 21160 for static image transmission, and already achieve satisfactory experimental result, which make a foundation for mimo adaptive equalization to be appllied in the real communication systems

    為對mimo自適應均衡系統性能和設計做更深入的理解和研究，本文主要: 1 ）研究了寬帶選擇衰落通道特性及3gppscm通道建模模擬; 2 ） mimo線性自適應均衡器和mimo非線性自適應均衡器系統的性能分析和模擬實現; 3 ） mimo系統下的判決反饋均衡器的階數選擇模擬試驗分析; 4 ）把mimo自適應判決反饋均衡運用到了硬體模擬平臺上，採用了基於adsp - 21160的硬體dsp開發板，對靜止圖片的傳輸進行了試驗、分析和比較，得到了較滿意的實驗結果，使mimo自適應均衡在實際通信系統上的應用及實現奠定了現實基礎。
  3. However, multipath components can be resolvable due to the autocorrelation of the spread spectrum signal, thus the optimal receiver equals coherent rake reception, i. e. maximum ratio combining the independent components which endure flat fading or frequency non - selective fading. synchronization of pn code and separation of resolvable multipath components need to estimate the exact time delay among the multipath components

    但是利用擴頻信號的自相關特性，可分辨多徑可以被有效分離，最優接收機等效為對多個具有獨立平坦衰落通道（或頻率非選擇性通道）特性的多徑信號進行最大比合併，即相干rake接收。
  4. Adaptive modulation mainly include several problem for example signal shape, channel estimation, all digital receiver and so on. since the channel referring to adaptive modulation is very hostile in wireless transmission channel, its algorithms and architectures used for the modulation and demodulation should be carefully devised and considered. designing appropriate algorithms and architectures of the adaptive modulation are main research goal of this paper to meet the need of flat fading channel and selective fading channel

    自適應調制技術主要包括信號成形、通道估計和檢測、全數字接收等方面的問題，由於自適應調制所涉及的通道是非常惡劣的無線傳輸通道，其調制與解調的演算法和結構必須加以精心的設計和考慮，針對具體所假設的平衰落和選擇性衰落的無線通道情況來設計自適應調制系統的演算法和結構是本文研究的主要方向。
  5. Then, base on the determine channel modeling methods, we present a frequency - selective mimo fading channel with von mises probability density function, which is used to characterize non - uniform angle - of - arrival caused by non - isotropic scattering. then we analyze partial cross correlation function of proposed model and proved the model theoretically

    然後，通過對其它多入多出通道模型的分析和對比，並基於確定性通道建模方法，建立了一種通用的頻率選擇性多入多出衰落通道模型，藉助「 vonmises 」概率密度函數，以描述非均勻散射體導致的非均勻本地來波方向分佈。
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