space diversity的例句大全

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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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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Meantime , the space diversity combining ( SDC ) technique is exploited to further perfect the systems performance.

并采用空间分集合并 ( SDC ) 技术进一步完善其上行链路性能.

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A Receive Space Diversity Scheme for MIMO-SC/ FDE Systems Based on Space-Time Block Coding

一种基于空时分组编码的MIMO-SC/FDE系统的接收空间分集方案

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Space diversity technology makes the MIMO radar can through the different Angle observation target, compared with the traditional radar is concerned, can be a very good inhibition target RCS flicker.

空间分集技术使得MIMO雷达能通过不同的角度观测目标，相比传统雷达而言，能很好的抑制目标的RCS闪烁。

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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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In the propose scheme, cooperation users rotate and superpose local signals and the signals received from cooperation partner in signal space diversity manner, and the destination node detects the signals in iterative manner.

在所提方法中，协同用户将中继信号和自己的信号按信号空间分集的优化方式进行旋转叠加然后传输，基站对数据进行迭代检测。

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before the joint antenna and sub-carriers allocation, the antenna selection based on markov chain monte carlo ( mcmc) is executed to reduce the quantity of space-frequency blocks used to resource allocation. consequently, the computational complexity is reduced enormously while retaining the advantage of space diversity.

在天线子载波联合分配之前，利用基于MCMC（Markov chain Monte Carlo）的天线选择算法减少参与联合分配的空频资源块，在尽量保留空间分集优势的情况下大大降低计算复杂度。

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Space diversity technology can solve this problem without increasing the transmission power or bandwidth.

空间分集技术可以在不增加发射功率或系统带宽的情况下解决这一问题。

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Therefore, cooperative diversity has been proposed, which enables single-antenna users to exploit space diversity in a distributed way by sharing their antenna and creating the virtual antenna array ( VAA) for relayed transmission.

合作分集技术是利用其他用户的天线构成虚拟天线阵（VAA），中继传输信息，从而实现分布式空间分集。

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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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Space time coded modulation has been shown to efficiently use transmits diversity in Raleigh fading channel.

空时编码调制是一种充分利用分集特性克服信道衰落的一种编码调制方式。

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Space time coding is a channel coding scheme for MIMO system, which combines the merits of the spatial-diversity and time-diversity. It provides both diversity gain and coding gain, which can provide much higher data rate-to-bandwidth ratio than single-antenna system.

空时编码是适合于多天线阵信道的一种编码方案，它综合了空间分集和时间分集的优点，同时提供分集增益和编码增益，能够获得远远高于传统单天线系统的频谱利用率。

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Space time coded modulation has been shown to efficiently use transmits diversity in Raleigh fading channel. Then, the investigation indicates that decreasing the amounts of subbands, and utilizing the diversity characteristic adequately in frequency domain of OFDM is an effective approach to reduce the performance degradation.

文中接着通过研究表明，在子带自适应编码调制中，减少选取子带的个数，充分利用OFDM频域上的分集特性是一种可以降低信道时变带来性能恶化的有效途径。

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These structures are characterized by polystage activity in aspect of time, diversity in aspect of the genesis and style, and obvious stratification, zonation and segmentation in the space. 4.

这些构造在时间上具有多期性；在成因和样式上具有多样性；在空间上则具有明显的分层性、分带性以及分段性的发育特征。

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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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Space Time Coding combining diversity, coding and modulation, can effectively resist multipath fading in the channel and improve the capability of the system, so it will probably become the key technology of the 3rd generation of mobile communication system.

空时编码技术综合考虑分集、编码和调制，能有效对抗信道中的多径衰落和提高系统容量，必将成为第三代移动通信系统中的关键技术。

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A modified distributed space-time code in cooperative diversity wireless network

合作分集无线网络中一种改进的分布式空时编码

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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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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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