時變道均衡 的英文怎麼說

中文拼音 [shíbiàndàojūnhéng]
時變道均衡 英文
tveq
  • 時 : shí］Ⅰ名1 （比較長的一段時間）time; times; days:當時at that time; in those days; 古時 ancient tim...
  • 道 : Ⅰ名詞（道路） road; way; route; path 2 （水流通過的途徑） channel; course 3 （方向; 方法; 道理） ...
  • 均 : Ⅰ形容詞（均勻） equal; even Ⅱ副詞（都; 全） without exception; all
  • 衡 : Ⅰ名詞1 （秤桿） the graduated arm of a steelyard2 （稱重量的器具） weighing apparatus3 （姓氏） a...
  • 均衡 : 1 （平衡的） balanced; proportionate; harmonious; even 2 （平衡） equilibrium; equilibration; equ...
  1. The super - exponential iteration ( sei ) blind equalization algorithm has the advantage of good tracking capability of the time varying channel

    超指數盲均衡演算法的迭代演算法收斂速度快，且便於跟蹤時變通道。
  2. In wireless and mobile communications, blind equalization and identification of dispersive channels is a very hot research topic recently, and it is especially a technical difficulty to identify and equalize the time - varying ( tv ) dispersive channels blindly

    在無線和移動通信中，色散通道的盲均衡和盲辨識技術是當前國際上的研究熱點，而時變色散通道的盲均衡與盲辨識問題更是其中的技術難點。
  3. Then this new model is disscused in detail and is extended to some more common tv dispersive channels. in the following chapter 5, we do much effort to research the methods of blind equalization and identification of tv dispersive channels based on the proposed dt canonical model

    首先對間接盲均衡方法，提出了對時不變通道矩陣的子空間營辨識算涪和可以消除誤差傳播效應的兩級盲辨識演算法，然後給出了一種直接盲均衡方法。
  4. However, adaptive equalization technique can decrease the effect of isi and noise, reduce the bit error ratio and trace time - changing channel

    而自適應均衡技術可以降低碼間干擾和噪聲的影響，減少誤碼，並能夠跟蹤時變通道，解決時變波形的嚴重失真問題。
  5. The following algorithms have been proposed and tested in the thesis : 1 frequency selective fading : combine the isomorphism between the input space and the output space and propose a new approach to blind equalization of the channel. compared with conventional methods, the new approach offers lower computational complexity, better performance, and more robust against the over - determination of the system order ; 2 time selective fading : a new approach to the equalization of time selective channel based on the zero - forced equalizer is proposed which is more simple in its structure of algorithm ; 3 time - varying channel : using the instantaneous mean value changes of the output signal to extract the information of channel variations and model it using ar model, kalman filter is then employed to track channel variations, it bears faster ability in tracking the variation of tv channels ; based on the isomorphism between the inputs and the outputs and some of the approaches using in mimo system, a new algorithm of equalization of simo time - varying channel is proposed, which also share the merits of being robust against the over - determination of the system order ; model the time - varying channel using the multi - resolution decomposition wavelets, and then a blind identification method based " on the model is proposed ; at last, a new model for equalization and identification of mimo system is proposed

    主要工作在以下幾個方面： 1 、針對頻率選擇性衰落通道：結合輸入輸出空間同構關系提出一種新的頻率選擇性通道均衡方法，與傳統方法相比，該方法計算量更小，收斂速度更快，性能更優，且對系統階次的過確定表現穩健，具有實際均衡應用價值； 2 、針對時間選擇性衰落通道：提出一種基於迫零均衡的時間選擇性通道均衡方法，演算法結構簡單； 3 、針對時變色散通道：利用瞬態均值曲線提取通道時變信息，對之ar建模，利用卡爾曼濾波器跟蹤時變通道抽頭變化，可以快速跟蹤通道變化；基於輸入輸出空間之間的同構關系以及多輸入多輸出系統的處理方法，提出了新的單輸入多輸出色散時變通道均衡與識別演算法，同樣具有對通道階次過確定保持穩健的優點；結合小波多解析度分析提出一種基於小波模型的通道盲識別演算法；研究時變的多輸入多輸出系統的盲均衡與盲反卷積問題，給出一種時變系統處理模型。
  6. A high precision fft architecture applicable for frequency - domain equalization in fpga

    時變通道下頻域均衡系統的干擾抑制
  7. Combined equalization block iterative soft decision feedback interference cancellation receiver

    數字并行接收機在時變通道下的通道估計與均衡方法
  8. Firstly, a new joint filterbank precoders and decision feedback equalizers structure is proposed, and the corresponding optimization result based on the maximal mutual information criterion is derived. secondly, the concept of dt canonical model is proposed, which is very suitable for the task of blind signal processing based on the second - order statistical of the observations. thirdly, the methods of blind equalization and identification of the tv dispersive channels are researched systematically based on the proposed dt canonical model, and a subspace blind identification algorithm of the time - invariant channel matrix is developed

    本文創新性的成果在於：提出了預編碼-判決反饋聯合均衡系統結構，並從理論推導得出了對應的最大互信息量最優化設計結果；首次提出了時變色散通道的離散正則模型概念，該模型適宜於利用觀察數據的二階統計量進行盲信號處理；基於離散正則模型對時變色散通道進行了系統的盲均衡和盲辨識方法研究，提出了對時不變通道矩陣的子空間盲辨識演算法；針對誤差傳播效應問題，提出了可以消除誤差傳播效應的兩級盲辨識演算法；提出了基於離散正則模型的直接盲均衡演算法；提出了基於特徵恢復思想的神經網路直接自適應盲均衡演算法。
  9. We propose the joint filterbank precoders and decision feedback equalizers structure at first, by which the dispersive channel is equivallent into parallel independent flat fading subchannels such that the diversity gain of the receiver is increased. then we adopt the discrete - time ( dt ) canonical model to convert the problem of blind signal processing of tv dispersive channels into processing the time - invariant multi - channels model blindly, and discuss the problem of blind equalization and identification of tv dispersive channels based on this new model

    第一種是採用濾波器組聯合均衡方法將色散通道等價為一組獨立的平坦衰落子通道，以提高接收機的分集增益；另外一種是提出採用離散正則模型將時變色散通道的盲信號處理轉化為時不變多通道模型的盲信號處理，並針對該模型對時變色散通道的盲均衡與盲辨識方法進行了詳細討論。
  10. The idea of diversity is emphasized in this thesis in signal processing perspective, and two schedules are proposed to perform it

    文章重點從分集處理的角度來討論時變色散通道的盲均衡和盲辨識問題，指出了兩種採用信號處理方法實現這一思想的基本策略。
  11. After that, the concept of dt canonical model in the cdma context is proposed to overcome the drawbacks of complex exponenial basis expansion models and the continual - time canonical models

    在接下來的第五章中，基於提出的離散正則模型，作者對時變色散通道的衰均衡與盲辨識方法進？
  12. The very recent results of blind equalization and identification of the tv dispersive channels in wireless communications are reviewed at first in detail, the drawbacks of them are pointed out and the basic idea overcoming them are suggested, which is the motivation of this thesis

    論文首先回顧了目前時變色散通道的盲均衡與盲辨識技術的研究進展，指出了其中存在的問題和解決的思路，從而指明了本論文研究的動機和出發點。
  13. According to wireless and mobile communication system ' s background, this thesis study on estimation of time - varying dispersive channel from four respects : ( 1 ) aid of pilots, ( 2 ) cyclic prefix ( cp ), ( 3 ) blind method, and ( 4 ) ofdm system with multiple transmitting antenna, in which the typical ways is decision - feedback algorithm and self - adaptive block algorithm

    本文以無線和移動通信系統為背景，從四個方面對時變色散通道下的ofdm系統的通道估計和均衡問題進行了研究。第一是基於導頻符號的通道估計方法，第二是基於循環前綴的通道估計方法，第三是通道的盲估計方法，第四是基於多天線ofdm系統的通道估計和均衡方法的研究。
  14. In this thesis, several approaches are studied, including optimal parametric feedforward estimation of fading channels, basis expansion for estimation and equalization of channels, channel estimation based on pilot and data traffic channels and channel estimation using linear interpolation

    針對這個問題，本文研究了各種時變衰落移動通信通道的估計與均衡的方法，包括非盲估計的方法、線性內插的方法、基展開的非盲方法和衰落通道最優前饋參數估計的方法。
  15. But the traditional adaptive equalizers need periodically retrained, because the underwater acoustic channel is a stochastic time - varying channel. although the traditional adaptive equalizer increase the reliability of the propagation, the rate of it is decreased. so they are not very applicable in the field of the propagation of high rate signals through an underwater acoustic channel

    但是由於水聲通道的隨機時變性，傳統的均衡技術需要周期性的發送收端已知的訓練碼來跟蹤通道的變化，這樣做雖然提高了數據傳輸的可靠性，但是系統的重復訓練大大的降低了通信效率，在水聲通道高速率數據傳輸中並不適用。
  16. Because of enabling to provide high - rate and high - quality wireless and mobile communication service, orthogonal frequency division multiplexing ( ofdm ) system is becoming a very hot research topic recently, and it is especially one of the technical difficulties to estimate and equalize the time - varying ( tv ) dispersive channels

    在移動無線通信中，由於能提供高速率和高質量的通信服務，正交頻分復用（ ofdm ）技術成為當前國際上的研究熱點，而時變色散通道的估計和均衡問題是其中的技術難點之一。
  17. Comparison study between the constant modulus decision feedback equalizer ( dfe ) and several others is made on combating the frequency selective fading of uwac, and their tracking performance to time varying is also investigated

    ?針對水聲通道的頻率選擇性衰落，對比研究了常數模判決反饋盲均衡演算法與其它幾種盲均衡演算法的性能。針對水聲通道的時變特性，研究了該演算法的跟蹤摘要性能。
  18. With the development of dsp chip techniques and the introduction of some mature techniques, such as fft / ifft, the application of 64 / 128 / 256 qam in high - speed modem, tcm, adaptive channel equalization, the insertion of guard interval and so on, people are starting to focus on the application of ofdm in the field of mobile communications

    隨著dsp晶元技術的發展，傅立葉變換反變換、高速modem採用的64 128 256qam技術、柵格編碼技術、軟判決技術、通道自適應技術、插入保護時段、減少均衡計算量等成熟技術的逐步引入，人們開始集中越來越多的精力開發ofdm技術在移動通信領域的應用。
  19. However, to the essential of communication technology, those techniques are all change in transmission medium or channel. recently, because of the development of dsp, ifft / fft, 46 / 128 / 256qam using in high - speed modem, and gradual introduction of new coding technique, soft decision technique, channel self - adapting, guard interval, ofdm ( orthogonal frequency division multiplexing ) arouse more and more attention. as a technology of high - speed transmission, ofdm can resist isi effectively

    近年來，隨著dsp晶元技術的發展，傅立葉變換反變換、高速modem採用的64 128 256qam技術、柵格編碼技術、軟判決技術、通道自適應技術、插入保護時段、減少均衡計算量等成熟技術的逐步引入，正交頻分復用ofdm （ orthogonalfrequencydivisionmultiplexing ）作為一種可以有效對抗信號波形間干擾的高速傳輸技術，引起了廣泛關注。
  20. On account of the importance of channels, we also discuss the characteristic of time - varying and fast - fading mobile channels and introduce channel modeling and a method of high - speed simulation for fading channels by using table look - up technique. in addition, because these approaches are simulated on the basis of 3rd generation partnership project ( 3gpp )

    由於通道在研究時變衰落移動通信通道的估計與均衡中缺一不可，文中還討論了衰落通道的統計特性和動態特性，快速衰落時變通道的建模和一種使用查表法的快速通道模擬的演算法。
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