noisy channel 中文意思是什麼
noisy channel
解釋
有干擾波道-
According to horodeckis, the coherent information of entangled state is supposed to be the lower bound of one - way distillable entanglement. this postulation is called hashing inequality, which is crucial in proving noisy channel coding theorem. it is shown that there are no direc
根據horodecki等人的研究，糾纏態的相干信息推測是單向蒸餾糾纏的下限，該假設稱為hashing不等n式，對證明有噪通道編碼定理至關重要 -
Convolutional coding is a coding scheme often employed in deep space communications and recently in digital wireless communications. it offers an alternative to block codes for transmission over a noisy channel
卷積碼被運用於衛星通信和無線通信系統中，它提供了一種不同於分組碼的在噪聲通道下傳輸信息的一種編碼方案。 -
The models of unconditional security from quantum channels and noisy channels are two typical methods now. two parties begin the secret - key agreement over a public channel
目前最典型的方法是利用有擾通道或量子通道建立無條件安全模型，通信雙方在公共通道上進行密鑰協商。 -
Information - theoretically secure secret - key agreement is the key to make perfect security. the models of unconditional security from quantum channels and noisy channels are two typical methods now. once the secret - key has been agreed over a public channel, one can use the key to encrypt messages by using one time pad
現在通常的做法是通信雙方使用有擾通道或量子通道建立無條件安全模型，然後在公開認證通道上交互信息進行密鑰協商，通信雙方把協商之後的安全的密鑰作為雙方共享的密鑰使用一次一密體制進行保密通信。 -
Turbo code, which utilizes the condition of random coding and decoding of shannon noisy channel coding theorem, has obtained the performance near to shannon theoretic limit. the performance of turbo code is the best one in all presented coding methods
Turbo碼由於很好地應用了shannon有噪通道編碼定理中的隨機性編譯碼條件而獲得了接近shannon理論極限的譯碼性能。 -
However, the power line has largely been dismissed as being too noisy and unpredictable to be useful as a practical high - speed communication channel
然而，電力線由於其自身的噪聲嚴重和不可預測的特點，而很少作為高速數據通信通道。 -
Communications technologies address the issue of how signals can be transmitted and properly received over a noisy channel
通訊技術旨在解決如何透過噪音訊道傳送及準確接收訊號的問題。 -
At first, the error model of the vector quantization, watermarking embedding and the noisy channel were established and further the simplified model was given
為了用蟻群演算法進行優化，首先建立了矢量量化、水印嵌入及通過噪聲通道的誤差模型，並給出了簡化模型。 -
Because the watermark embedding and the noisy channel were directly related to the codeword index order in the model, at the same time deciding the codeword index was a np - hard problem typically, so the ant colony algorithm was introduced to optimize it in order to make the bit error rate lower and the embedded watermark more invisible
在該模型中，由於水印嵌入和通道噪聲直接與碼字索引相關，所以該模型誤差由索引值決定，又由於碼字索引的確定是np難度問題，故引入蟻群演算法對其優化是方便的，優化目標是降低誤碼率和使不可見性達到最佳。 -
The accuracy of a speech recognition system in actually noisy environment is seriously affected by the additive noise and the channel distortions
實際環境中的背景噪聲和傳輸通道變化所引起的畸變嚴重影響了語音識別系統的性能。
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