衰落帶寬 的英文怎麼說

中文拼音 [shuāilàdàikuān]
衰落帶寬 英文
fading bandwidth
  • 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
  • 衰落 : decline; be on the wane; go downhill; fading; decay; decaying; lapse; erode
  1. And the most advantage of ofdm is that it can convert high - rate data stream into the low - rate and reduce data bandwidth so that multi - path - fading can be transformed into flat fading in wireless circumstance

    這種調制技術的最大的好處就是將高速的數據流，變換成并行的低速數據流，減小了數據帶寬，從而可將無線環境中的多徑衰落（頻率選擇性率落）轉換成平坦衰落。
  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. With the characteristics of large ambient noise, very narrow bandwidth, low carrier frequency, great propagation latency and time - space - frequency variant multipath effect ( mpe ), the stochastic ocean channel has demonstrated the greatest complexity and difficulty for underwater acoustic wireless communications. among them multipath effect ( mpe ) is the most difficult obstacle that results in signal fading and inter - symbol interference ( isi )

    但是噪聲高、帶寬窄、載波頻率低、傳輸時延大、多途徑效應隨時間?空間?頻率變化等通道特性都會給有效、可靠的水聲通信帶來很大的麻煩，其中多途徑效應是最主要的困擾因素，它會導致信號幅度衰落和碼間干擾。
  4. Abstract : in this paper, an orthogonal multicode wideband cdma system modelincluding pilot channel based on chaos spreading sequences is given. based on chaos sequences, with pilot channel inserted orthogonally, it is shown that the performance of the system is improved. the performance of the system in fading channel is analyzed

    文摘:提出一種基於混沌序列含導頻信號的寬帶正交多碼cdma系統模型，利用混沌序列以及採用正交插入導頻信號提高系統性能，並對此模型在衰落通道中的性能進行分析。
  5. Be based upon the studies of sea optical scatter channel by use of monte carlo simulation, the channel is described as a multipath routeway in this paper. the effect on the communications performance, created by the frequency selectivity decline caused by the multipath routeway, is worked over. the correlation bandwith of sea optical scatter channel is analyzed and quantified through the simulation on the computer

    基於對海水通道的蒙特卡羅模擬，本文對海水通道進行了多徑化描述，研究了由於通道的多徑化所產生的頻率選擇性衰落對通信質量的影響，分析並通過計算機模擬確定了海水通道的相關帶寬。
  6. In wireless digital transmissions, due to the delay dispersion of the transmitted symbols and the limitation of channel bandwidth, the channel may induce inter - symbol interference ( isi ), which results the frequency selective fading

    在無線數字傳輸中，由於時延擴展和通道帶寬限制，引起碼間串擾，產生頻率選擇性衰落。
  7. However, to achieve this objective, various technical challenges must be overcome. for example, the deployment of broad - band wireless access systems would require a transmission technique which can mitigate the detrimental effects of frequency selective fading

    為達到這一目的，有一些技術問題必須得到良好的解決，比方說在寬帶通信模式下由於延遲擴展造成的頻率選擇性擴展和由多普勒效應產生的通道時域衰落。
  8. Ruilan s bws3500 broadband wireless access system is capable of solving effectively the fundamental problem of selective frequency attenuation caused by multi - path interference. therefore, it is capable of providing generalized access ( non line - of - sight or quasi line - of - sight transmission )

    瑞瀾公司的bws3500寬帶無線接入系統可有效地解決多徑干擾引起的「選頻衰落」這一根本性問題，因此能夠實現普遍化的接入（非視距或準視距傳輸） 。
  9. This novel transmit diversity technique, which combines channel coding, modulation and signal processing at receive terminal, can make full use of the fading multi - path in the wireless communication systems so as to mitigate the signal attenuation. this technique is mainly designed to combat channel fading in downlink transmission by combining the technique of channel coding and that of array diversity, hence increasing the capacity of wireless communications systems and giving diversity gain and coding gain to them

    基於多輸入輸出（ mimo ）的空時編碼技術是實現未來帶寬資源日益緊張的高速無線數據通信系統的重要技術，它結合了通道編碼、調制和接收端的信號處理，能夠充分利用無線通信通道中多散射體環境所造成的多徑，從而提供信號的抗衰落性能。
  10. It combines the advantages of ofdm and cdma. it can convert the frequency selective channel propagation of the broadband to flat channel of the subcarrier

    它結合了ofdm和cdma技術的優點，能夠把寬帶頻率選擇性衰落轉化為每子載波的平坦通道。
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