gaussian channel 中文意思是什麼

gaussian channel 解釋
高斯通道
  • gaussian : adj. 高斯的。
  • channel : n 1 水路,水道,渠,溝;海峽;河床,河底。2 (柱等的)槽,凹縫;【機械工程】槽鐵,凹形鐵。3 〈比...
  1. We collect distributing of near - field of optical switch output - port. using gaussian curve fit, we measure the extinction ratio of " bar channel " is 8db, and the extinction ratio of " cross channel " is more than 18db

    利用紅外攝像機採集的光開關輸出的近場分佈,採用對場光場能量高斯擬合的近似方法,測得該關注入光開關的直通端的消光比可以達到8db ,而反射端的消光比則至少可以達到18db以上。
  2. The amazing character of the quantum capacity of gaussian channel is that planck constant h takes over the place of input power restriction of classical capacity

    高斯通道量子容量的迷人特徵是普朗克常數h取代了經典容量中輸入信號功率限制條件的位置。
  3. 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。
  4. The simplified gaussian approximation can be obtained, which has almost the same in accuracy but much less calculations than improved gaussian approximation method. the single traffic cdma system in nakagami fading channel with rake receiver is investigated extensively. a closed form ber expression is obtained with arbitrary chip waveforms

    由於在用戶小時其誤差大,改進高斯法可以提高精度,但需要更多的計算時間,少用戶時直擴系統的工程計演算法能夠獲得與改進高斯法相似的精度,但需要的運算量大為減少。
  5. The main program is designed by matlab language, others by c language. the simulation experiments are made in the gaussian and rayleigh channel

    使用matlab語言編制主程序, c語言編寫了部分子程序,採用高斯通道和瑞利通道對衛星通信系統進行了模擬實驗。
  6. 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。
  7. The new algorithms for classification of mpsk, mask and mqam signals using cumulant invariants are proposed in gaussian noise and ideal communication channel environment. the new classification features are blind to unknown snr and reference phase

    提出了在高斯噪聲和理想通道環境下,基於高階累量不變量特徵的mpsk 、 mask和mqam信號調制分類演算法,新特徵對信噪比和未知的參考相位參數是盲的。
  8. With the method of integral within ordered product of operators, we obtain the analytical expression of quantum information counterpart of mutual information. the coherent information, as a function of input thermal state power and thermal noise channel power, we discuss the upper and lower bound for quantum gaussian channel introduced by holevo - werner and by quantum codes

    用正規乘積內的算符積分技術求出了互信息的量子對應物? ?相干信息用輸入熱噪聲信號功率和通道熱噪聲功率表示的公式。討論了由holevo和werner引入的量子高斯通道量子容量的上界及由量子編碼所確定的下界。
  9. 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。
  10. 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。
  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. 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。
  13. 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。
  14. For example, the average number of retransmissions can be decreased 50 % at 1 db snr in the gaussian channel and 9 db snr in the rayleigh channel

    如在高斯噪聲環境下,信噪比為1db時減少超過50 % ;在瑞利噪聲環境下,信噪比為9db時也減少了50 % 。
  15. Considering the payload when transmitted in gaussian channel according to information theory, the system builds up a mapping relationship between image space and watermarking space, and achieves the trade - off between theoretic capacity, robustness and perceptual distortion

    考慮高斯通道傳輸時信息理論的容量,系統建立了圖像空間和水印空間的影射關系,實現了水印系統應用時的理論容載、魯棒性和人類感官之間的一種平衡關系。
  16. This thesis presents the acquisition method of synchronization codes and time mark codes under - 20db gaussian channel. then the total step length between initial state and current state can be calculated. basing on the step length, we can deduce the current state of pseudo - random codes, and implement the acquisition of the special pseudo - random codes

    本文設計出時間標記碼在信噪比達- 20dd時的捕獲方案,在此基礎上提出了由偽碼歷經的狀態數,計運算元碼當前狀態的方法,從而獲得了在30秒內完成導航定位衛星信號直接捕獲的方法與實現方案。
  17. We apply generalized gaussian distributions to statistically model the dct coefficients of different natural images. as a result of our work, fast estimating expression for channel model parameters are derived

    我們用廣義高斯分佈去作為自然界圖像經過dct變換后的分佈模型,作為我們工作的結果,通道模型參數的快速估算表達式被推導並和實驗結果進行了比較。
  18. Based on the obtained lower bounds on mean squared channel estimation errors, the limits on bit error rate ( ber ) for maximal ratio combining ( mrc ) with gaussian distributed weighting errors on independent and identically distributed ( i. i. d ) fading channels are presented

    通過對不同衰落通道多普勒譜的積分,求出了相應的通道估計均方誤差下界的閉合表達式,並在此基礎上得到了分集系統在獨立同分佈的衰落通道中採用最大比合併時的誤碼率下界。
  19. Simulator presented in this paper provides a direct interface for the test of shortwave communication system, which well represents various features of hf channel such as multi - path delay, rayleigh fading, doppler shift, doppler spread, gaussian noise and impulsive interference, etc. in order to realize the channel simulation for the intermediate frequency signal, we, inspired by the idea of soft - defined radio, bring forward a new design method that the channel simulator consists of several dsp chips

    本文研製的模擬器提供介面直接對短波通信系統進行測試,能夠全面反映短波通道的多徑時延、瑞利衰落、多普勒頻移、多普勒擴展、高斯噪聲和脈沖干擾等特性。為了實現對中頻信號的通道模擬,開發出一個結合軟體無線電思想的由多個數字信號處理晶元構成的短波通道物理模擬器。
  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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