decision feedback 中文意思是什麼
decision feedback
解釋
判定反饋-
The study on decision feedback equalizer based on channel estimation
基於通道估值的判決反饋均衡器研究 -
Based on fractional sampling method, a new super - exponential iteration decision feedback blind equalization algorithm for severely nonlinear phase distortion channels was proposed
因此針對嚴重頻率衰落和非線性相位失真通道，提出了一種分數采樣的混合盲均衡演算法，並獲得了較快的收斂速度和較小的剩餘均方誤差。 -
The actuarial control cycle emphasizes the importance of the actuarial control method in the risk management of the insurer, and develops the actuarial technique into the systemic management method or the decision - making support method. the actuarial control cycle can provide the insurer with a reasonable risk supervising and managing process through a continual feedback process
精算內控系統強調了整體精算控制方法在保險公司風險管理中的重要性，將精算發展成為一整套系統的管理決策支持思想和方法，並通過一個連續的回饋過程使精算內控系統成為任何保險公司合理的風險監管過程的基礎。 -
This thesis analyzed the error performance of mfsk and mpsk modulator in hf with optimal receiver, studied the shortcoming and strongpoint of several typical short - wave data transmission systems and their performance over fading and intersymbol interference channels. the theory and key technical of adaptive modem is discussed. in the last, an efficient modulation scheme - block coded modulation is introduced into hf radio systems to improve the efficiency of hf data transmission, this paper also proposes a hf data transmission system scheme composed of a block coded modulator and a decision feedback type adaptive equalizer
本文在對短波數傳兩種常見調制方式fsk及psk最佳解調性能分析的基礎上，討論了幾種採用典型調制技術的短波數傳系統（如時頻調制、多進制頻移鍵控慢跳頻、 chess系統）原理、優缺點以及抗衰落和抗符號間干擾的性能；分析了自適應串列數傳系統抗短波通道衰落和多徑干擾的原理、關鍵技術；在本文的最後引入一種有望解決短波數傳系統低效率狀況的調制方式bcm -分組編碼調制，給出了一個採用bcm技術與自適應均衡技術相結合的短波數傳系統方案，並通過計算機模擬進行了初部驗證。 -
The matlab language and c language were applied to simulate the fixed - point dsp arithmetic of equalizer algorithm. the simulation result indicated the diveragence phenomenon would happen to adfe ( adaptive decision feedback equalizer ) based on rls algorithm under the fixed - point finite - precision arithmetic
採用matlab和c語言模擬均衡器定點dsp演算法的實現，模擬結果表明rls演算法的自適應判決反饋均衡器（ adfe ）在定點有限字長運算的情況下存在著發散現象。 -
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 -
In this paper, consulting the idea of software radio and using the three important theories of maximum mean power estimate ( mmpe ) for symbol synchronization algorithm, the kalman decision - feedback equalization ( dfe ) algorithm and the decision - feedback phase lock loop ( dfpll ) algorithm, a kind of low frequency digital demodulate scheme over high - frequency ( hf ) radio channels for 8psk signial is realized
本文利用軟體無線電的思想，提出了一種hf通道8psk信號低頻采樣數字化解調方案。討論了實現該方案的三個核心演算法：最大平均功率定時同步演算法、判決反饋式鎖相環和卡爾曼均衡器，分析它們的基本理論，並進行了性能測試。 -
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。 -
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。 -
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。 -
This article proposes two solutions to the question, one of which is the combination of the space - time mmse receiver and the decorrelating multiuser detector, another of which is the combination of the space - time mlse receiver and the decision - feedback detector
本文提出了兩種方案：一種是空時最小均方誤差（ mmse ）接收機與解相關多用戶檢測器相結合；另一種是空時最大似然序列估計（ mlse ）接收機與判決反饋檢測器相結合。 -
Then we focus on decision feedback equalization ( dfe ) algorithm which is widely used in mimo signal detection. subsequently, a minimum mean squared error ( mmse ) detector based on wl detection combined with the decision feedback strategy for ca - mimo is derived. meanwhile, the issue that how to use wl detection in da - mimo system is discussed and a solved project is also presented
本文第四章在介紹了寬線性檢測技術的基礎知識之後，著重針對mimo信號檢測演算法中使用廣泛的反饋判決檢測演算法，提出了一種基於最小均方誤差準則的寬線性反饋判決集中式mimo信號檢測演算法;同時，結合第三章的內容，對分佈mimo信號如何採用寬線性檢測提出了一套解決方案，通過計算機模擬，給出了幾種分佈mimo檢測演算法的性能;結果表明，在採用最優檢測順序的情況下，兩 -
In chapter 3, based on the idea of joint equalization, we adopt the decision feedback equalizers to perform the second equalization to overcome the problem of filterbank precoders - linear equalizers joint optimization proposed recently, and get a new optimal result
在第三章中，基於聯合均衡的思想，針對國際上最新提出的濾波器組預編碼-線性均衡最優設計中存在的問題，文章提出了採用判決反饋均衡器完成二次摘要均衡，以消除殘留的塊間干擾，得到了新的最優設計結果。 -
In this proposed algorithm, the phase rotation can be compensated using higher order statistics, nonlinear transform of equalizer outputs, and decision feedback algorithm, the faster convergent speed can be obtained by introducing sign algorithm, and the mse can be reduced via employing decision feedback equalization algorithm
該演算法充分利用高階統計量所包含的相位信息、均衡器輸出信息的非線性變換及判決反饋演算法來補償相位旋轉；利用符號演算法可以減少計算量的特點來加快收斂速度；利用判決反饋濾波器的性能來減小均衡器輸出的均方誤差。 -
The proposed algorithm outperforms blind linear equalizer ( le ) based on statistical equalization criterion in reducing the mse and compensating for the carrier phase rotation and blind linear decision feedback equalizer ( ldfe ) based on statistical equalization criterion in improving convergent speed
因此，該演算法在減小均方誤差與補償相位旋轉方面的性能優于基於統計特性均衡準則的線性盲均衡演算法；在收斂速度方面的性能優于基於統計特性均衡準則的線性判決反饋盲均衡演算法。 -
For greatly overcoming the carrier phase rotation resulting from multipath underwater acoustic channel and large mean square error ( mse ) at convergent end of linear equalizer ( le ) based on higher order statistics, statistical equalization criterion based blind linear sign decision feedback equalizer ( lsdfe ) was proposed
摘要為了克服多途水聲通道引起信號的相位旋轉及基於高階統計量的線性均衡器（ le ）收斂后均方誤差大的不足，提出了基於統計特性均衡準則的線性符號判決反饋盲均衡演算法。 -
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。 -
The simulation result indicated the decision - feedback equalizer ( dfe ) had good adaptability to hf channel. the converaging behavior and tracking behavior of two kinds of the adaptive algorithm - lms algorithm and rls algorithm were analysized
分析了2大類自適應演算法? ? lms和rls演算法的收斂和跟蹤性能，模擬結果表明了rls演算法具有良好的跟蹤和收斂性能。 -
The main contributions of this thesis are as follows : ( 1 ) the conventional minimum output energy ( moe ) algorithm has the global convergence but its stable excess mean square error is high and it ca n ' t converge to the minimum mean square error ( mmse ). in this thesis an equivalent decision feedback moe ( df - moe ) algorithm variable step - size is presented and analyzed
主要工作可以概括如下： （ 1 ）針對最小輸出能量檢測器（ moe ）具有全局收斂，但是穩態剩餘均方誤差比較大，無法收斂到最佳mmse檢測器的特點，提出並分析了一種等效的判決反饋變步長moe檢測演算法（簡稱df - moe ： decidedfeedbackmoe ） 。 -
At this part, it firstly comes up with a quasi - static frequency selective fading channel model. based on this channel model, considering about the characteristics of the model and the lattice reduction complexity, we proposed a new detection strategy, which is the lll detection algorithm combined with decision - feedback technique
首先提出了準靜態頻率選擇性多徑通道模型，然後基於該模型提出了一種新的用於準靜態頻率選擇性通道的檢測方案，即與判決反饋相結合的格約簡輔助檢測方案。
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