fast fading 中文意思是什麼
fast fading
解釋
急速消失-
A channel estimator for multi - carrier system in fast time - varying fading channels
一種快時變通道下多載波傳輸系統的通道估計方法 -
As the application of rake receivers with multitaps is widely used in cellularcdma systems for exploiting path diversity, the closed - loop power control schemesshould make use of the multitap rake receivers for tracking the power variation dueto path loss, slow fading, and fast fading
同時，本文給出的自適應變步長閉環功率控制演算法利用rake接收機跟蹤通道的變化，與傳統的固定步長閉環功率控制相比獲得了較小的ebi0標準差。 -
It consists of a powr compensation algorithm based on reverse channel prediction and closed - loop power control algorithm. computer simulation showed that the scheme could compensate the fast channel fading quite well
它由基於反向通道預測的功率補償演算法和常規閉環功率控制組合而成。計算機模擬結果表明，所提出的組合功率控制方案能夠很好地補償通道的快速衰落。 -
Two approaches to improve the robustness of the detector, each based on a different theirs distortion mechanism. one is based on the modeling as fast fading distortion ( ffd ) whose optimum detector is the segmented replica correlator ( src ). the second approach is replica correlation integration ( rci ) for time spreading channel ( tsd )
從頻率擴展通道（ fastfadingdistortion ， ffd ）和時間擴展通道（ timespreadingdistortion ， tsd ）的形成機理出發建立了目標回波的數學模型，指出ffd和tsd的最佳檢測器分別為分段副本相關器（ src ）和副本相關積分器（ rci ） 。 -
The simulation shows that under the fast fading channel circumstance, the wrls - svm channel estimation can acquire the high error performance
模擬結果表明，在快衰落通道條件下，小波遞歸最小二乘支持向量機導頻通道估計方法可以獲得較好誤碼性能。 -
Combined with the data - selected schemes proposed, the computational complexity of this method can be lowered. the performance of the presented rls method is analyzed by simulations, and it is shown that this method is interesting for application. 4 time - selective channel signal model based on multipath - doppler diversity representation is given in multi - path fast fading channel, and rls space - time receiver algorithm based on time - varied constraint condition is presented and the computational complexity of this method is analyzed
4 、針對多徑快衰落通道下的ds - cdma系統，給出了基於多徑-多譜勒觀點描述的1百安電弓卜科東兔j憶學協士學位論文時間選擇性通道的信號模型，提出了基於變約束條件下的遞歸最小二乘空時接收機演算法並分析演算法的運算量，最後通過模擬分析了所提出的方法的性能。 -
Considering the disadvantages of these methods in dealing with fast fading channels, a chip - level adaptive channel estimation method is proposed in this thesis and has better performance than other methods. furthermore, a procedure to derive optimum step length for this technique is given in particular
在分別對簡單平均， wmsa和fbprelms通道估計演算法進行分析后，著重介紹了適于低速與高速衰落情況下，進行碼片級自適應變步長lms通道估計的由來、原理與實施的具體方法，並且推導了變步長的選取。 -
After analyzing the performance of the coherent tree - structured optimal joint detection ( tsojd ) for qpsk signals and deriving a non - coherent multi - user weight / phase estimator, the dissertation proposes a low complexity non - coherent multi - user weight / phase optimal joint detection algorithm. besides, the dissertation proposes a partial coherent multi - user / iv weight / phase optimal joint detection algorithm and some useful conclusions are obtained in comparison experiments. 4. in the research on the diversity techniques for fast fading multi - path channels, the dissertation proposes a time - scale rake receiver, and analyzes its performance with the conception of auto - wavelet - transform ( awt ) and time - - scale resolution
提出了過飽和低復雜度qpsk信號的樹型最佳聯合檢測演算法，並分析了相應最佳接收機的性能及相位偏差對性能的影響等問題；考慮了載波相位和多用戶信碼的聯合檢測問題，通過理論推導給出了過飽和多址系統中多用戶信碼/相位聯合估計子，提出了低復雜度非相干多用戶信碼/相位最佳聯合檢測演算法，並分析了此非相干最佳接收機的誤碼性能及相位提取誤差等有關問題；提出了部分相干多用戶信碼/相位最佳聯合檢測演算法，通過計算機模擬分析了該接收機的誤碼性能及相位提取誤差等有關問題，並與相干、非相干解調兩種情況作了比較，得出了一些有益的結論。 -
It inherits the anti - multipath fading ability of ofdm technology as well as the high user capacity of cdma. however, the ofdm - cdma system is vulnerable to channel estimation errors in fast varying channels
但是在快速時變通道中，正交頻分復用碼分多址系統對于通道估計誤差很敏感。 -
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。 -
Multibeam base - station smart antennas are discussed in this paper. we analyze the outage probability of mobile communication system suffering both fast fading and shadowing by means of statistical propagation model, and contrast the case that adopt multibeam smart antennas to the case that adopt omnicase. the results emulated by computer show that the outage probability of mobile communication system will diminish as the increasing of the number of beams using smart antennas no matter when suffering a single co - channel interfence or six ones
研究了移動通信環境下的多波束智能天線，並基於統計傳播的同通道干擾模型，分析了快衰落及慢衰落情況下未採用多波束智能天線與採用多波束智能天線時的中斷率，並進行了比較.計算機模擬結果表明：採用多波束智能天線，不論在單個同通道小區還是多個同通道小區情況下，系統的中斷率將隨著波束數的增大而降低 -
In order to achieve fast and reliable communication, we need to identify and equalize the channel for the purpose of combating the effects caused by channel fading
為了得到高速可靠的通信，需要對通道進行辨識和均衡以克服通道衰落的影響。 -
Inked characters fast fading on the frayed breaking paper
報紙磨破了，上頭的油墨字跡很快就模糊了。 -
This fast drying formula prevents nail polish from fading and cihpping for a longer lasting manicure
這種快乾的配方防止造成指甲的光滑退掉和缺陷，長時間保持修指甲的狀態。 -
Computer simulation results indicate that the hybrid stbc / v - blast mimo - ofdm system can combat multi - path fading and fast fading at the same time
模擬結果和理論分析表明，後者能夠同時有效對抗多徑和快衰落移動通道環境。
分享友人