white gaussian noise 中文意思是什麼

white gaussian noise 解釋
高斯白噪聲
  • white : n 懷特〈姓氏〉。adj 1 白（色）的，雪白的；白晰的，帶白色的；蒼白的。2 白種人的。3 銀制的；白衣的...
  • gaussian : adj. 高斯的。
  • noise : n 1 聲音，聲響。2 叫喊；嘈雜聲，噪音；喧鬧聲；吵鬧，騷動，騷擾。3 〈古語〉謠言，風聲。4 〈美國〉...
  1. 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；然後闡述了turbo碼的基本原理，包括turbo編譯碼器結構及迭代譯碼原理；較為詳細地描述了關鍵的譯碼演算法： ?種改進的最大后驗概率（ map ）譯碼演算法及迭代譯碼演算法；提出了一種新的turbo碼結構：混合turbo碼（混合級聯卷積碼） ；並用編碼性能聯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；並在高斯白噪聲通道和瑞利衰落通道上分別作了一些應用研究及計算機模擬實驗。
  2. 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，推導得出大步進搜索的虛警概率和檢測概率的公式。
  3. 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

    維特比譯碼演算法是最大似然譯碼，在由高斯白噪聲引起的隨機錯誤的通道中有良好的性能，但當通道錯誤集中或為突發錯誤通道時，維特比譯碼演算法則性能急劇下降。
  4. 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通道中的發射信號，提出了利用單音信號頻域特性的單音干擾抑制方法。
  5. 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通道，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的時頻同步方法。
  6. 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

    在筆者原有結果[計算機模擬， no . 8 ， 2004 ]的基礎上，本文提出進一步提高解碼圖像質量和編碼速度的方案:一是預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。
  7. Also, much related research requires the narrowband assumption, which is not always realistic in practical applications. it is necessary to analyze the effects of finite bandwidth to bearing estimation of spatially distributed source. additionally, more complex noise models should be dealt with in practical situations as well as that of white gaussian noise

    不過，其中多數方法僅適用於小角度擴展情況，當角度擴展比較大時，需要在估計的穩健性和運算量之間進行折中；而且，許多方法要求信號傳播滿足窄帶假設，這在實際的應用場合中可能很難得到滿足，有必要分析信號帶寬對分佈源波達方向估計的影響；另外，也有必要考慮空間色噪聲環境中的分佈源波達方向估計問題。
  8. Simulation results show that the algorithm is effective to reduce the impacts of impulse noise, white gaussian noise and gaussian colored noise

    模擬實驗結果表明：該演算法對于沖擊噪聲有抑制作用，對高斯白噪聲、高斯有色噪聲也有一定的抑制效果。
  9. 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信號對抗技術中的盲參數估計問題，本文著重研究了平方倍頻法、時域自相關法、延遲相乘法三種常規的單參數估計法以及四階累積量2 - d切片多參數估計法。
  10. This method can also be used in other signal processing field to estimate white gaussian noise

    該方法還可以用於其它信號處理領域高斯白噪聲的估計。
  11. Current analyses of the watermarking channel are typically limited to the additive white gaussian noise ( awgn ) channel

    當前典型的水印通道分析被限制在加性白高斯通道上。
  12. 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，提出一種自適應小波降噪演算法，用於語音信號的增強。
  13. The white gaussian noise was successfully separated from noise signal in low - field pulse nmr system and its parameters were estimated by using this method

    採用該方法從實際低場脈沖核磁共振系統噪聲信號中分離出高斯白噪聲並對其進行了參數估計。
  14. Subsequently the channel was modeled for three types namely additive white gaussian noise, flat fading and frequency selective fading. lastly, the receiver was studied

    接下來通道建模成三種不同的類型，即加性高斯白噪聲通道、平坦衰落通道和頻率選擇性衰落通道。
  15. 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。
  16. In this paper, bit - error rate performance analyses are presented for coded and un - coded frequency hopping m - ary frequency - shift keyed systems under the condition of additive white gaussian noise ( awgn ) and partial band noise jamming and multitone jamming. the use of error - correct codes provide a way to improve the performance of frequency hopping system, particularly the use of reed - solomon code in a fh system under the condition of partial band noise jamming can greatly improve the performance of system. so we provide the way of coding and decoding of rs code in c language. in the end, we offer the simulation of the performance of time diversity fh / 2fsk system over partial band jamming noise channels

    第一章為緒論，敘述跳頻通信的發展趨勢，以及基本概念，第二章及第三章介紹提高抗部分頻帶干擾的前向糾錯碼reed - solomon碼的原理和實現方法。第四章研究跳頻通信系統在各種干擾條件下的性能。最後在第五章以fh mfsk系統為例，探討在部分頻帶干擾下的系統性能，並進行計算機模擬，模擬結果表明採用分集技術和各種編碼技術對于系統的性能改善具有明顯的效果。
  17. 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

    本文研究並設計了含有雙穩態隨機共振系統作為一個接收裝置的基帶數字通信系統，在加性高斯白噪聲通道中，通過研究這個非線性接收器的性能，發現了數字信號傳輸中存在的參數調節隨機共振現象?通道容量隨著系統響應速度的增加具有一個共振峰值，並對這種非線性現象發生的基本機理進行了解釋。
  18. A serial generalized morphological filter with multi - structural element is used suppression white gaussian noise or pulse noise embedded in the speech signal. the paper compares morphological speech enhancement algorithm with classical approach on the feature of speech in the frequency domain and time domain

    本文針對形態學在數字語音信號增強中的應用演算法研究，採用多結構元素的廣義形態濾波器，主要用於對被高斯白噪聲或正負脈沖噪聲污染的語音信號的濾波增強，深入研究形態學濾波的語音增強演算法在語音時域、頻域對語音特徵參數的影響。
  19. Last, based on the mc - cdma system model above mentioned, the matlab simulation is done. by the simulation of the ber performances from white gaussian noise, peak power clipping and combating multipath interference are analyzed, and some conclusions are obtained that mc - cdma is superior to ofdm

    最後，在上述給出的mc - cdma模型中，通過matlab模擬分析了在mc - cdma與ofdm兩種系統中由高斯白噪聲、削波噪聲以及多徑干擾所造成的誤碼率分佈曲線，得出mc - cdma系統在無線數據傳輸方面較ofdm系統更具有優良的特性，並給出了比較具體的性能分析。
  20. In the thesis, an approach that is based on signal - space concepts is used to efficiently evaluate the ber performance of mpsk and mqam over an additive white gaussian noise channel. in particular, accurate ber approximations are obtained and shown to be in good agreement with system simulation results. it may be useful to research and development of digital modulation technologies in hfc of our country

    嘗試採用基於信號空間的分析方法，給出了awgn通道中mpsk和mqam的ber的計算方法以及由這種方法得到的ber性能曲線，然後將信號空間分析法得到的結果與通信系統模擬的結果進行比較，證明其與模擬結果較好地吻合。
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