多天线系统可以改进无线通信的容量，提高可靠性。
Multiple antenna system can improve the reliability and capacity of wireless communication.
多天线空间分集技术是抵抗无线信道衰落的有效手段。
It is well accepted that spatial, or multiple-antenna, diversity is an efficient technique to combat the negative effects of channel fading in wireless networks.
多天线技术，用它可以放置在一个装置之间的干扰最小。
With IMD technology, multiple antennas can be placed in a device with minimal interference between them.
如何对这种多天线系统建模以及采用何种传输策略值得研究。
How to model this multiple antenna system and what transmit scheme should be adopted is worth studying.
然而由于移动台的尺寸和载频的限制，使多天线技术很难实现。
However, due to the size of a mobile and carrier frequency constraints, multiple antennas can not be possibly implemented.
天线选择是一种低成本、低复杂度的有效方法，可以利用多天线系统的多数优点。
Antenna selection keeping many advantages of MIMO system is an efficient way to reduce cost and complexity.
结果表明，混合方法能够快速有效地分析电大尺寸载体上多天线系统的辐射特性。
Comparing with the analyzing results of MoM, hybrid technique proves an efficient and fast way to analyze radiation behavior of wire antennas on the electrical large platform.
最近的研究表明，在衰落信道多天线MIMO系统的容量随发射天线数线性增加。
Recent work has shown that capacity of a multiple-antenna MIMO system is increased linearly with the number of transmitter antennas in fading channels.
本文采用矩量法和微波网络理论相结合的方法分析了车载多天线系统的电磁兼容问题。
The moment method combined with theory of microwave network is used for the analysis of EMC problems of the vehicular multiple antennas system.
还有闭环MIMO等多天线技术的使用，使得umb系统的系统容量有了极大的提升。
And the capacity of the UMB systems has been greatly improved by using the multiple antenna technology, like the Closed-loop MIMO.
采用多天线的分布式MIMO系统保持了分布式天线系统和点对点MIMO系统的优点。
Distributed MIMO that employs multiple antennas keeps the advantages of the distributed antenna system and the point-to-point MIMO system.
这篇论文的研究的是CDMA系统中的多用户接收的问题，包括单天线系统和多天线系统。
This paper focuses on the multiuser detection in CDMA system, which includes SISO and MIMO systems.
然而，使用多天线，就意味着多个射频链路会增加天线的体积、功率、硬件，从而增加成本。
However, multiple antenna system needs multiple RF chains, which will add cost in terms of size, power, and hardware.
MIMO中继技术结合了多天线系统和中继技术的优点，进一步提高了中继系统的频谱效率。
MIMO relay channels, which combines the multiple antenna system and the relay, can improve the spectral efficiency of relay network.
研究了基于队列稳定性模型的认知多天线系统功率控制优化问题，并对系统性能进行了分析。
For cognitive MIMO system based on the queuing stability model, the power control optimization problem and the system performance of spectrum access is analyzed.
天线的尺寸可以制造的很小。这是由于当有许多天线时，相对较小的频带宽度对于各个天线是足够的。
The antennas can be made very small, because a relatively small bandwidth is sufficient for an individual antenna, when there is a plurality of antennas.
多天线和OFDM的结合极大地提高了系统容量，OFDM能为系统提供平坦衰落信道，而多天线则提供空间增益。
The combination of MIMO and OFDM greatly increases the system capacity in the sense that OFDM and MIMO can respectively provide flat fading channel and spatial gain.
本文验证了粒子群算法在天线布局问题中的正确性和有效性，这样也为更加复杂的多天线系统布局提供了思路和分析方法。
We validate the correctness and effectiveness of the PSO in the antenna placement problem, which can provide an opinion and analytic method in many antennas system.
结果表明，在接收天线数目多于发射天线数目的情况下，该文提出的功率平衡方法可以有效降低多天线系统接收端的BER值。
Simulation results indicate that power balancing can decrease BER at receiver when the number of receiver antennas is greater than that of transmitter.
正交频分复用(OFDM)技术、单载波频域均衡技术(SC -FDE)和多天线技术都是有助于达到这一目标的有效技术。
Orthogonal frequency division multiplexing (OFDM), single carrier frequency domain equalization (SC-FDE) and multiple antennas technique are efficient techniques to achieve this goal.
基于双衰信道的频域响应，提出了一类双衰信道下多天线正交频分复用（MIMO-OFDM）系统的最优化频域导频设计方案。
The model of the MIMO-OFDM system in doubly-selective channels is derived and a lower bound of mean squared error(MSE) of the channel estimator using frequency domain pilot is presented.
利用该方法良好的收敛性，可以借助于电子计算机快速的构造目前已知的具有最大码率和最小解码时延的多天线复正交空时分组编码矩阵。
By the convergence of the method, we can fast construct a COSTBC matrix with the maximal rates and the minimal decoding delays that we all know now recur to the computer.
本文深入分析了多天线宏分集下的CDMA系统前向容量并发现，在传统CDMA系统中，无论采用何种功率分配方案，宏分集都会导致前向容量损失。
In this paper, we analyze the CDMA forward-link capacity with macrodiversity and the results show that macrodiversity causes forward-link capacity loss whatever power allocation scheme is adopted.
本文深入分析了多天线宏分集下的CDMA系统前向容量并发现，在传统CDMA系统中，无论采用何种功率分配方案，宏分集都会导致前向容量损失。
In this paper, we analyze the CDMA forward-link capacity with macrodiversity and the results show that macrodiversity causes forward-link capacity loss whatever power allocation scheme is adopted.
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