additive white gaussian noise造句
例句與造句
- Current analyses of the watermarking channel are typically limited to the additive white gaussian noise ( awgn ) channel
當(dāng)前典型的水印信道分析被限制在加性白高斯信道上。 - In the presence of additive white gaussian noise , an adaptive wavelet - based de - noising algorithm for speech enhancement applications is proposed
針對加性高斯白噪聲的情況，提出一種自適應(yīng)小波降噪算法，用于語音信號的增強。 - In awgn ( additive white gaussian noise ) channel , we introduce a new single - tone interference suppression scheme in the single - tone interference environment
針對加性白高斯噪聲信道中的發(fā)射信號,提出了利用單音信號頻域特性的單音干擾抑制方法。 - Subsequently the channel was modeled for three types namely additive white gaussian noise , flat fading and frequency selective fading . lastly , the receiver was studied
接下來信道建模成三種不同的類型，即加性高斯白噪聲信道、平坦衰落信道和頻率選擇性衰落信道。 - Sinusoidal frequency estimation is the procedure which can estimate the frequency of sinusoidal waves in additive white gaussian noise through transform and calculation for signal ' s samples
正弦信號頻率估計是指通過對信號采樣值的計算和變換，估計出淹沒于噪聲中的信號的頻率的過程。 - It's difficult to find additive white gaussian noise in a sentence. 用additive white gaussian noise造句挺難的
- In additive white gaussian noise ( awgn ) channel , we introduce a method for synchronization of symbol timing and frequency for two - dimensional spread spectrum system without prior knowledge of spread spectrum matrix
摘要針對加性白高斯噪聲信道，考慮未知二維擴頻矩陣的條件下，提出了一種二維擴頻系統(tǒng)的時頻同步方法。 - And the output components of the despread correlator under the condition of additive white gaussian noise ( awgn ) are analyzed to derive the expressions for the false alarm probability and the detection probability
同時也對解擴相關(guān)器在接收端噪聲為加性白高斯噪聲情況下的輸出成分進行了詳細分析，推導(dǎo)得出大步進搜索的虛警概率和檢測概率的公式。 - Deriving formulas of map algorithm and its modified algorithms in the log domain ( including max - log - map and log - map ) , and simulating the performances of turbo codes over additive white gaussian noise ( awgn ) . 2
詳細推導(dǎo)了map譯碼算法，以及map算法在對數(shù)域中的修正算法( max - log - map和log - map算法) ，并對turbo碼在高斯白噪聲信道下的性能進行了仿真分析。 - That is by inserting known symbols or pilots in time and frequency domain to estimate the channel frequency response . the proposed method employs iterative low - pass filtering in transform domain which can reduce additive white gaussian noise and inter - carrier interference effectively
該估計算法采用在變換域多次迭代濾波的方式,能夠顯著降低高斯噪聲和載波間干擾( ici )對估計性能的影響,同時快速fft算法也使得變換域濾波變得比較簡便。 - Turbo codes represent the new code structures , which consist of pccc ( parallel serially convolutional code ) and sccc ( serially concatenated convolutional code ) . in this paper , the background of turbo codes are firstly introduced , which includes the base principle of error correction code 、 block code and convolutional code ; the principle of turbo code and the iterative decoding is secondly expanded ; the key decoding algorithm : a revised map algorithm and iterative decoding theory are detailed ; then , a new turbo code structure : hccc ( hybrid concatenated convolutional code ) is presented , and the capacity of this code method is analyzed , the average capacity upper bound is derived ; at last , this code is simulated on awgn ( additive white gaussian noise ) channel and rayleigh fading channel
本文首先介紹了turbo碼的背景知識，包括差錯控制的基本原理、分組碼和卷積碼；然后闡述了turbo碼的基本原理，包括turbo編譯碼器結(jié)構(gòu)及迭代譯碼原理；較為詳細地描述了關(guān)鍵的譯碼算法： ?種改進的最大后驗概率( map )譯碼算法及迭代譯碼算法；提出了一種新的turbo碼結(jié)構(gòu)：混合turbo碼(混合級聯(lián)卷積碼) ；并用編碼性能聯(lián)合界分析方法對混合turbo碼進行了性能分析，得出了其平均性能上界；并在高斯白噪聲信道和瑞利衰落信道上分別作了一些應(yīng)用研究及計算機仿真實驗。 - Many of communication systems take the convolutional code and viterbi algorithm as the channel coding scheme . the viterbi algorithm decoding is a kind of maximum likelihood decoding , and its performance is good over additive white gaussian noise ( awgn ) channel , but when burst errors occur , the decoding performance may be greatly degraded
維特比譯碼算法是最大似然譯碼,在由高斯白噪聲引起的隨機錯誤的信道中有良好的性能,但當(dāng)信道錯誤集中或為突發(fā)錯誤信道時,維特比譯碼算法則性能急劇下降。 - For the issue of blind parameter estimation of dsss / bpsk signal damaged by strong additive white gaussian noise ( awgn ) , this dissertation mainly researches on carrier doubler method ( cdm ) , auto - correlation method ( acm ) , delay - and - multiply ( dm ) method and fourth - order cumulant 2 - d slice method
針對受強高斯噪聲污染的dsss / bpsk信號對抗技術(shù)中的盲參數(shù)估計問題,本文著重研究了平方倍頻法、時域自相關(guān)法、延遲相乘法三種常規(guī)的單參數(shù)估計法以及四階累積量2 - d切片多參數(shù)估計法。 - In the point of - information theory ; - the - baseband binary pulse amplitude modulated ( pam ) signal transmission , via turning the nonlinear receiver ' s parameters , is studied over an additive white gaussian noise ( awgn ) channel . it is demonstrated that the channel capacity of binary communication systems , for a given signal added noise , can be maximized by optimal designed receivers . this new form of sr is referred to as psr in a broad sense
本文研究并設(shè)計了含有雙穩(wěn)態(tài)隨機共振系統(tǒng)作為一個接收裝置的基帶數(shù)字通信系統(tǒng)，在加性高斯白噪聲信道中，通過研究這個非線性接收器的性能，發(fā)現(xiàn)了數(shù)字信號傳輸中存在的參數(shù)調(diào)節(jié)隨機共振現(xiàn)象?信道容量隨著系統(tǒng)響應(yīng)速度的增加具有一個共振峰值，并對這種非線性現(xiàn)象發(fā)生的基本機理進行了解釋。 - On the basis of the authors ’ results published in this journal [ 67 ] , this paper further proposed two strategies which improved both quality and speed of fractal encoding : one , a priori adding additive white gaussian noise into the image being encoded to reduce the domain blocks that are unlikely to meet the constraint on contrast scaling factors ; the other , range blocks with small standard deviations are directly approximated by the constant block ( i . e . , all the
在筆者原有結(jié)果[計算機仿真, no . 8 , 2004 ]的基礎(chǔ)上,本文提出進一步提高解碼圖像質(zhì)量和編碼速度的方案:一是預(yù)先在待編碼圖像中添加高斯白噪聲以進一步減少不滿足對比度因子約束的domain塊的數(shù)目;二是對小方差range塊直接用其均值塊代替以進一步加快編碼速度。 - Simulation results demonstrate theoretical derivation is correct and both sequences can be used in communication . based on the presented ds / sfh communication scheme , and employing msk as fh spread spectrum modulation , the performance is studied n the presence of partial band multitone jamming and additive white gaussian noise ( awgn )
根據(jù)所提出的混合ds sfh擴頻通信系統(tǒng)方案，采用msk相干調(diào)制，在假設(shè)直接序列擴頻后信號帶寬等于跳頻間隔的情況下，推導(dǎo)了系統(tǒng)在部分頻帶多頻干擾和加性白噪聲下的誤比特率公式。
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