衰落特性的英文

• fading characteristics

• "衰落"英文翻译    decline; be on the wane; go ...
• "特性"英文翻译    characteristic; character; p ...
• "降落特性" 英文翻译 :    falling characteristic
• "垂直起落特性" 英文翻译 :    vtol characteristics
• "短距起落特性" 英文翻译 :    stol characteristics
• "频响跌落特性" 英文翻译 :    roll-off characteristic
• "在甲板上降落特性" 英文翻译 :    deck landing characteristics
• "小面积机场起落特性" 英文翻译 :    short-field characteristic
• "衰落" 英文翻译 :    decline; be on the wane; go downhill; fading; decay; decaying; lapse; erode 日趋衰落 fall into decay with each passing day; be on the decline; 日益衰落 be on the wane; 作为一个世界强国, 这个国家已经衰落。 the nation declined as a world power. 旧文化很快地衰落下去。 the old civilization was fast falling into decay
• "菌落特征" 英文翻译 :    conlony characteristics
• "堕落,衰落" 英文翻译 :    decadence
• "径衰落" 英文翻译 :    multipath fading
• "抗衰落" 英文翻译 :    anti-fading◇抗衰落天线 anti-fading antenna; 抗衰落系统 anti-fading system
• "快衰落" 英文翻译 :    fast fading; rapid fading; short-term fading
• "慢衰落" 英文翻译 :    long-term fading; slow fading
• "平衰落" 英文翻译 :    flat fading
• "强衰落" 英文翻译 :    deep fade
• "上衰落" 英文翻译 :    fading rise
• "声衰落" 英文翻译 :    sound fading
• "衰落，斜度" 英文翻译 :    fall
• "衰落比" 英文翻译 :    fading ratio
• "衰落机" 英文翻译 :    fading machine
• "衰落率" 英文翻译 :    fading rate
• "衰落期" 英文翻译 :    phase of decline; winter
• "衰落区" 英文翻译 :    declining region; decliningregion; fade area; fade zone; fading area; fading region; fadingarea

• 5 . the detailed compare of the different topologies of receiver based on the in - depth analysis of each part of rfic . and their analysis and simulation results based on different wireless communication standards are also given
  在对射频集成电路各部分详细分析以及无线信道衰落特性估计的基础上，对射频接收芯片( receiver )的不同拓扑结构进行了对比和分析。
• On the other hand , cdma ( code - division multiple access ) communication system has been widely considered as the mainstream of 3g communication system , because it has the good qualities such as high utilization ratio of frequency band , low transmission power , powerful anti - multiple path falling and flexible capacity
  另一方面， cdma通信系统以其高频谱利用率、低发射功率、强抗多径衰落特性、软容量等优点，已被广泛认为是第三代移动通信系统的主流。
• In this paper , we discuss the principle of mimo - ofdm system based on the introduction of fading channels . furthermore , the channel estimation technique in mimo - ofdm system is investigated , with the emphasis on training sequence - based and pilot - based channel estimation methods , and also several basic and improved algorithms are given respectively . finally , the analysis and comparison of these algorithms is made by computer simulation
  本文在分析移动无线信道衰落特性的基础上，阐述了mimo - ofdm系统的基本原理，并围绕该系统中信道估计这一关键技术，深入研究了基于训练序列和基于导频符号的两类信道估计方法，给出几种相应的信道估计算法以及它们的改进算法，最后结合matlab仿真对这些算法的有效性和可行性进行了全面地分析与比较。
• ( 3 ) for the wireless channels subject to several types of fading existing in different time scales , the dynamics of channel conditions are decoupled into two random processes with different mathematic properties in different time scales . two algorithms in this scheme are proposed to dealing with each time scale : the resource optimizer allocates the resource to maximize the total revenue with price fairness and provide qos guarantees to applications , and the slot scheduler exploits the time variability of
  （ 3 ）针对无线信道衰落的多时间尺度特性，将信道条件snr分解到不同时间尺度上，在不同时间尺度上针对不同的衰落特性来设计不同的算法，完成不同的任务：在大时间尺度（帧）上进行资源分配，面向应用提供qos保证，保持应用间price公平性的情况下，寻求系统总收益utility的最大化；在小时间尺度（时隙）上进行时隙调度，利用各用户信道容量的时变性，使各用户获得比平均信道条件情况下更高的吞吐量。
• Rapid fading and so on . then we introduce the qam schemes of modulation about the design of parameters and constellations of qam and show the result of 8qam and 16qam . afterward we switch to the study of adaptive project , above all , we find that we can alter the parameter of nakagami fading channels to other fadings , and then we study three different adaptive projects
  首先，阐述了移动通信中信道的衰落特性，分别分析信道的阴影衰落、慢衰落、快衰落几种模型；接着对qam的调制原理进行了分析，着重研究了这种调制方式的参数设置以及星座图的设计，文中示出了8qam和16qam的框图和波形情况。
• In this paper , the fundament , the system architecture and the application of orthogonal frequency division multiplexing ( ofdm ) were discussed , and the mathematic model of time - varying multi - path based on the discussion of mobile fading channel characteristic were analysed , and the channel model were discussed by computer simulation
  本文首先简要介绍了正交频分复用（ ofdm ）的基本原理、系统组成以及ofdm的实际应用。在分析移动信道衰落特性的基础上，分析了多径时变信道的数学模型；并用计算机仿真的方法对信道模型进行了讨论。
• The propagation characteristics of underwater acoustic channels and their influences on long - range information transmission are studied thoroughly . based on the sonar equation , the optimal frequency band is abtained . from the calculation about transmission loss , the source level is forecasted . based on the random time varying channel theory , the fading characteristics of long - range underwater acoustic channels are analyzed
  系统、深入地研究了水声信道特性及其对水声远程信息传输系统的影响；从声纳方程出发，确定了系统的最佳工作频段；在声传播损失计算的基础上，给出了声源级的预报；基于时变信道理论，描述了远程水声信道的衰落特性。
• The simulation results based on siso and mimo systems show that the proposed scheme could effectively eliminate the time - variant fading characteristics of wireless channel and under an acceptable demand of ber , the frequency efficiency is enhanced greatly and besides , dynamic encoding is implemented with low complexity and high efficiency
  通过在单天线和多天线系统中的仿真,表明该方案可以有效的克服无线信道的时变衰落特性,在满足误码率性能要求的基础上可以提高系统频谱利用率,且实现复杂度低。
• In mimo systems , the signal can be sent and received through multiple antennas or antenna arrays . the combination of ofdm and mimo can effectively alleviate the problem of multi - path propagation , increase system capacity , and obtain more robust system capability , so they are considered as the main stream techniques of the future wireless communication system
  Ofdm技术固有的抗信道多径和频率选择性衰落特性以及mimo在提高系统频谱利用率,改善无线通信系统性能等方面的巨大作用,使得这两种技术的融合成为了下一代移动通信系统的必然选择。