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dispersive channel
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  色散信道
     Prediction Modelling and Computer Simulation of Radio Wave Propagation Loss in Microcellular Multipath Dispersive Channel
     微蜂窝多径色散信道电波损耗预测的建模与仿真
短句来源
     Precise Simulation Model Design of OFDM Systems Working Under Time-varying Dispersive Channel
     OFDM系统在时变色散信道中的精确建模与仿真
短句来源
     Based on deeply analyzing the propeties and propagation mechanisms of microcellular mobile radio channel, this paper researches and proposes the new generalized prediction model of radio wave propagation loss in microcellular multipath dispersive channel, whose key points are to characterize the influence of three dimensions multipath dispersive channel performance on radio propagation with the help of additional path attenuation factor, and to use the minimum inflection point distance of the first Fresnel region in propagation channel as a characteristic porameter expressing unitedly the influences of antenna height and frequency.
     本文在深入分析微蜂窝移动无线信道特性及其传播机理的基础上,研究和提出了微蜂窝多径色散信道电波传播损耗的一般性新的预测模型,其特点是用附加路径衰减因子来表征三维多径色散信道特性对电波传播的影响,以及用传播信道第一菲涅耳区的最小拐点距离作为统一反映天线高度和频率影响的特征参量;
短句来源
     Based on researching propagation property theoretical model of angle-dispersive channel, the paper has set up a universal structure model of arbitrary incident angle distribution in propagation channel expressed by characteristic parameters which represented the channel physics, researched and analyzed the signal propagation properties of mobile radio multipath dispersive channel in different urban environment with the help of this incident angle distribution model, finally making use of computer simulation, analyzed the effect of different radio wave incident-angle distributions on the propagation performance of the channel.
     本文在研究角度色散信道传播特性理论模型的基础上,构造了一种用代表其信道物理量的特征参数表示任意传播信道电波入射角分布的一般结构模型,并根据这种入射角分布模型来研究和分析在不同城市环境中移动无线电多径色散信道的信号传播特性,最后通过计算机模拟仿真进一步分析了不同的电波入射角角度分布对信道传播特性的影响。
短句来源
     For this reason, the angle dispersive channel appears with frequency dispersion due to Doppler effect, so the key of researching the channel performance is to study the distribution structure of incident angle in various propagation environment.
     因此角度色散信道是在多普勒效应的作用下伴随着频率色散而出现的,而对其信道特性进行研究的关键就是了解各种传播环境下的电波入射角分布结构。
短句来源
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  弥散信道
     On Adaptive Equilibrium Problem of a Linear Dispersive Channel
     线性弥散信道的自适应均衡问题研究
短句来源
     After the overview of OFDM, the principle of the realization of OFDM by IFFT/FFT is examined; then, the matrix method is used to analyze ISI (Inter-Symbol Interference) and ICI (Inter-Carrier Interference) cancellation brought by using Cyclic Prefix in a time dispersive channel.
     其中 ,OFDM基本原理部分首先介绍了OFDM的 IFFT/ FFT实现 ,然后用矩阵的方法分析了循环前缀对时间弥散信道所带来的 ISI和 ICI的消除。
短句来源
     Firstly ,based on high utilization of frequency spectrum and reduced multipath fading , explains basic cause of bringing about OFDM′s advantages ,secondly , analyzes ISI( Inter Symbol Interference) and ICI( Inter Carrier Interference) cancellation brought by using Cyclic Prefix in a time dispersive channel.
     首先从高的频谱利用率和抗多径衰落出发 ,先对 OFDM优点的基本原理进行了阐述 ,然后分析了循环前缀对时间弥散信道所带来的 ISI和 ICI的消除。
短句来源
     Lattice Orthogonal Frequency Division Multiplexing(LOFDM) is a promising technique for high data-rate transmission in double(namely time-frequency) dispersive channel.
     LOFDM(LatticeOrthogonalFrequencyDivisionMultiplexing)是时频弥散信道上的一种高速数据传输技术。
短句来源
  “dispersive channel”译为未确定词的双语例句
     Application of Wavelet in Detection Dispersive Channel and Feature Extraction of Wideband Echo
     基于小波变换的畸变信道检测和目标特征提取研究
短句来源
     According to different channel models, CDMA systems can be divided into additive white gaussian noise (AWGN) channel and dispersive channel, time-variant and time-invariant channel.
     CDMA系统按信道模型的不同分为高斯白噪声信道和衰落信道、时变和时不变信道。
短句来源
     OFDM, with the advantage of high spectrum efficiency and easy realization, can strongly combat multi-path and dispersive channel interference, so its application is remarkable in recent years.
     正交频分复用(OFDM)技术具有抗多径时延、抗信道衰落、频谱利用率高、硬件实现简单等优点,近年来受到广泛关注。
短句来源
     OFDM, with the anvantage of high spectrum efficiency and easy realization, can strongly combat multi-path and dispersive channel interference, so its application is remarkable and it will be the key technology of 4G without question.
     而OFDM技术具有抗多径时延、抗信道衰落、频谱利用率高和硬件实现简单的特点,近年来获得了广泛的应用,并且有望成为4G的核心技术。
短句来源
     OFDM have high spectrum efficiency and can strongly combat multi-path and dispersive channel interface.
     OFDM技术具有频谱利用率高,抗多径时延及信道衰落等主要优点。
短句来源
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  dispersive channel
Multi-user and self interference effects in a QPSK DS-CMA downlink with a Ricean dispersive channel
      
However, the signal reaching any given mobile passes through a dispersive channel, thus destroying the orthogonality.
      
Thereafter, the algorithms were tested for a dispersive channel, where the plant was a complex FIR filter whose coefficients were generated randomly.
      
This system can operate in a highly time dispersive channel with satisfactory bit error rate.
      
Indeed, each OFDM subchannel has its gain being expressed as a linear combination of the dispersive channel taps.
      
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The papcr presents a method of the combination of an adaptive equalizer and Mini- mum Shift Keying (MSK) modulation. The experiments and simulation are made in the time dispersive channel. Finally, the method is compared with the QPSK system.

提出了一种具有平方根Kalman自适应算法的均衡器与频谱特性较好的最小频移键控(MSK)调制相结合的方法。在多径信道下,对该方法进行了模拟和实验,并且对MSK和QPSK与均衡器的结合进行了比较。

RhodOdendron is a largest genus which is now known at least 967 species in the family Ericaceae in the world andabout 562 species in China(exclude the infraspecific taxa).On the basis of the viewpoint of the florology,the systematic positions and the distributional patternsThis branch project is a part of the great item, namely,The Floristic Study on the Chinese Seed Plants(9390010)sup-ported by the National Natural Science Foundation of China. among 8 subgenera (namely,Humenanhes,Rhododendron,Azaleastrum,Tsutsusi,...

RhodOdendron is a largest genus which is now known at least 967 species in the family Ericaceae in the world andabout 562 species in China(exclude the infraspecific taxa).On the basis of the viewpoint of the florology,the systematic positions and the distributional patternsThis branch project is a part of the great item, namely,The Floristic Study on the Chinese Seed Plants(9390010)sup-ported by the National Natural Science Foundation of China. among 8 subgenera (namely,Humenanhes,Rhododendron,Azaleastrum,Tsutsusi, Pentanthera,Therorhodion,Candidastrum,Mumeazalea) are discussed and the relationships be- tween phylogeny and the geographical distribution are analysed. It is can be shown that the ubgenus Hymenanthes and subgenus Rhodendron are two evolutional branches which despersed and multiplied by the different way in early period of the origin of this genus.Ever since the Tertiary perlod,specific characters of this two subgenera has developed highly,therefore the spe- cies diversities,are remarkable,the number of species attains 80% of the world's total.Primitive characters occur in svevral subSections of Hymenanthes, especially in subsect.Fortunea and Auriculata. The distributional regions of species spread widely in Europ,North America and Asia,one species far reaching Qeensland in Australia. Sino-Himalavan is both the centre of abundance and the centre of diversity in this genus,but Malaysia is only a centre of abundance. Most species of the RhodOdendron are local endemic species,the endemism is conspicuous,for example,about 862 endemic species are common in East Asia and MalaYsia,more than 89% ofthe species total. Excluding the subgenera Candidastrum and Mumeazalea there are six subgenera in China,out of aotal 562 species,405 endemic species are found. By analysing the fossil records of thd Tertiary period,the times and areas ofworld wide dis-tributions of the Rhododendrons and the adaptive environments of living primitive taxa, it can be regarded that the southwest to central region of China is quite possible the location of its origin,the ancestral primitive Rhododendrons might to be originated during the Cretaceus to early Tertiary period. The dispersive channels towards the nortli part of Northern Hemisphere,towerds the east,southeast and southwest parts of Asia and towards Australia are discussed.The reasons of for-mation of the modern distributional patterns depended mainly on three aspects,the multiplica- tion and the dispersal of Rhododendrons are restricted in historical development of the times and spaces and are also restricted in the genetic material of taxa themselves and their reaction capaci- ty to cope with changed environments.

已知世界杜鹃属(Rhododendron)植物约967种(种下分类等级未计算在内)。本文基于植物区系学的观点,讨论了属内8个亚属:常绿杜鹃亚属、杜鹃亚属、马银花亚属、映山红亚属、羊踯躅亚属、云间杜鹃亚属、纯白杜鹃亚属、异蕊杜鹃亚属的系统位置、分布式样。分析了系统发育和地理分布上的时间、空间关系。认为常绿杜鹃亚属和杜鹃亚属是在本属植物起源后的早期阶段就沿不同途径迁徙、繁衍的两个演化枝。白第三纪以来,它们的性状发展多样,种系高度分化。在现存类群中最具原始性状的亚属是常绿杜鹃亚属,这个亚属的云锦杜鹃亚组Subsect.Fortunea,耳叶杜鹃亚组subsect.Auriculata保持较多原始性状。种的分布遍及欧洲、北美洲、亚洲、大洋洲(有1种),东亚种类最多,马来西亚次之。中国-喜马拉雅地区既是多度中心又是多样化中心,马来西亚仅是多度中心。大多数种为地方特有性分布,特有现象十分突出,东亚和马来西亚的特有种共约862种,占种总数的89%以上。中国有6个亚属(Candliiastrum.Mumeazalea不产)约562种,其中特有种约405种。分析第三纪的化石记录,杜鹃属在全球分布的时间、地点,杜鹃属保持原始或?

The block data detection technique based on the least sum of squared errors criterion is an effective scheme used for time varying dispersive channels. In this scheme, the known training symbols are used to track the channel characteristics and to detect the unknown data symbols. The adoption of an algorithm of a simplified Cholesky matrix resolution may reduce the complexity and operation. The results obtained indicates that this scheme may effectively eliminate the intersymbol interference in...

The block data detection technique based on the least sum of squared errors criterion is an effective scheme used for time varying dispersive channels. In this scheme, the known training symbols are used to track the channel characteristics and to detect the unknown data symbols. The adoption of an algorithm of a simplified Cholesky matrix resolution may reduce the complexity and operation. The results obtained indicates that this scheme may effectively eliminate the intersymbol interference in the HF channels and it can be applied to the signal detection in the HF digital communication systems.

基于最小均方误差和准则的块式数据检测技术,是一种对时变色散信道数字信号进行有效检测的方法.该技术利用数据块中的已知训练符号对信道特性进行跟踪并对未知数据进行检测.采用简化的Cholesky矩阵分解算法,可减少系统复杂度和运算量.研究结果表明:该方案能有效地消除高频信道上的码间串扰,更适用于高频数字通信系统中的信号检测.

 
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