frequency diversity的例句大全

On the basis of existing space-time block code, frequency diversity is studied and a new space-time-frequency code is further designed and applied in the OFDM system, which encodes information in spatial, temporal and frequency domain.

在现有的空时分组码的基础上，研究频率分集进一步发展设计了新的在空间、时间、频率域上三维编码的空时频码，并将其应用于OFDM系统中。

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The common diversity be classified as space diversity, polarization diversity, frequency diversity, and time diversity etc.

通常的分集有空间分集、极化分集、频率分集、时间分集等，本文对分集研究技术的研究主要是空间分集和极化分集在数字域的实现等。

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Moreover the combined performance of frequency diversity and time diversity can be gained by using time-frequency RAKE receiver.

接收端使用时频RAKE接收机，可以使系统具有频偏分集和时延分集的性能。

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The research on OFDM spectrum sensing algorithm utilizes only the time diversity and frequency diversity to improve detection performance without utilizing spatial diversity.

目前针对OFDM信号的频谱感知算法研究只利用时域分集和频域分集提升检测性能，而没有考虑利用空间分集提升检测性能。

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The combination of these two technologies makes good use of space diversity, frequency diversity and time diversity to improve the system capacity and the ability of anti-interference.

两者的结合充分利用了空间分集、频率分集和时间分集来改善系统的容量和抗噪声性能。

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However, the traditional diversity techniques, such as time diversity and frequency diversity, take up extra system resources. Although space diversity needs no additional resources, it is difficult to achieve in hardware.

但是传统的分集技术，如时间分集、频率分集，需要占用额外的系统资源，空间分集虽然不需要额外的资源，但是在硬件上难于实现。

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It can obtain time diversity, spatial diversity and frequency diversity at the same time. So it not only can effectively combat the frequency selective fading in the course of spread, but also the spectrum efficiency is greatly improved.

它将时间分集、空间分集和频率分集有机地结合起来，不仅可以有效地抵抗信号传播过程中遭遇的频率选择性衰落，而且频谱利用率得到很大地提高。

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Multiple Input Multiple Output ( MIMO) antenna is a typical spatial diversity technique, by combining multiple antennas space-time block coding with orthogonal frequency division multiplexing ( OFDM) forming space-frequency block coding, In multipath channel fading conditions, which also can get additional frequency diversity gain.

多输入多输出天线既是一种空间分集技术，将多天线中的空时分组编码与正交频分复用技术相结合构成空频分组编码，在多径衰落信道条件下还可以获得额外多径分集增益。

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Analysis and Performance of Multicarrier Frequency Diversity Spread Spectrum Code Division Multiple Access Communication System

多载波频率分集扩展频谱码分多址通信系统及性能分析

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Space or multi-antenna diversity techniques are particularly attractive as they can be readily combined with other forms of diversity, e.g., time and frequency diversity, and still offer dramatic performance gains under these bases.

空间或多天线分集技术由于可以与其它如时间分集，频率分集技术相结合，并在其基础上提供很大的性能增益，而成为一种很有吸引力的技术。

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Frequency Diversity to Suppress Glint in Wide-Band MMW Radar

频率分集技术对宽带毫米波雷达目标角闪烁的抑制

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This provided advance study and brought forward the high removes resolution and frequency diversity.

提出用高分辨率和频率分集解决多径效应问题.

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Time spreading can implement RAKE diversity receiving in frequency domain.

与此对应，时间扩展通信也可以在频域上进行类似RAKE的分集接收，有效处理时变衰落带来的影响。

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The results showed that parameters Index of Diversity(ⅰ), Variance of Phenotypic Frequency ( VPF), Variance of Phenotypic Value ( VPV) and Coefficient of Variation ( CV) are more effective on evaluating different methods for core collection selection among 8 studied parameters.

结果表明，在所选8个参数中，多样性指数、表型方差、表型频率方差及变异系数为对比不同核心种质取样方法间优劣的有效参数；

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An adaptive orthogonal frequency division multiplexing ( OFDM) scheme is described with a simple space time coded transmit diversity for frequency selected fading channel by combining adaptive modulation with spacial diversity.

将自适应调制技术和空间分集技术有机地结合起来，提出了一种与简单空时编码发射机分集相结合的恒定比特率自适应正交频分复用（OFDM）方案。

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A Synchronizing System in 4-time 4-frequency Coded Diversity Receiver

四时四频编码分集接收的同步系统

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According to the maximization utility theory, first, we analyze the diversity characteristic affecting the system optimization, including frequency selection diversity, location diversity, the time diversity and queue diversity of member nodes.

本文根据最大化效益理论，首先，对影响系统目标优化的分集特性理论进行了分析，其中包括：频率选择型分集、地点分集、时间分集以及成员节点队列分集。

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A space-time-frequency ( STF) coded orthogonal frequency division multiplexing ( OFDM) transmitter diversity scheme for fast fading frequency selective channels is proposed. The proposed STF-OFDM transmission scheme owns time diversity gain.

提出了一种基于空间时间频率（STF）编码的正交频分多路复用（OFDM）发射分集方案，这种传输方案可用于频率选择性快衰落信道。

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A joint frequency and space diversity scheme is presented which can reduce computational cost.

分集技术，重点介绍了一种空间频率联合分集接收技术，它能够大幅度降低计算量；

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In this dissertation, the estimation algorithms of time-varying frequency selective channel in modern wireless communication systems including WCDMA uplink, WCDMA downlink with space time transmit diversity and MIMO system are investigated.

本文主要研究在现代无线移动通信系统中如何估计同时存在频率选择性和时间选择性衰落的信道，包括WCDMA上行链路，采用双天线空时发射分集的WCDMA下行链路和MIMO系统。

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