单用户检测中的关键技术很多，主要有接收端和发送端的同步，信道估计和分集等。
There are many key technologies about the single-user detection, such as synchronization between receiver and transmitter, channel estimation and diversity.
发射端分集、编码和调制结合空时格码，可以有效地提高信号在无线衰落信道中传输的有效性和可靠性；
Space-time trellis code combining space diversity with code and modulation, can improve efficiency and reliability of communication system in wireless channel efficiently.
空时编码技术通过空间和时间分集接收能有效增加信道容量。
Space -time coding can increase channel capacity by using the space and time diversity technique.
空时编码采用多发送天线设计信道编码，联合考虑分集、编码与调制，从而提高信号在无线衰落信道中传输的可靠性。
The design of channel codes for improving the reliability of communications over fading channel using multiple transmit antennas is considered.
单用户检测中的关键技术很多，主要有接收端和发送端的同步，信道估计和分集等。
There are lots of key technologies about single user detection, such as synchronization between receiver and transmitter, channel estimation and diversity.
因此在频率选择性衰落信道中，采用分集接收可以改善系统的捕获性能。
Therefore, system acquisition performance can be improved if diversity receiver is adopted for the frequency-selective fading channel.
提出了一种将线性多用户检测与发射分集相结合的新方法，该方法能在克服信道衰落的同时抑制多址干扰和码间串扰。
A novel approach is proposed for linear multi user detection in conjunction with transmit diversity to combat channel fading, multi user interference and inter symbol interference.
因此，在宽带衰落信道中可获得分集增益。
Therefore a diversity gain can be obtained in a broadband fading channel.
为了提高接收机的性能，一般采用RAKE接收等分集合并措施，这就需要准确的信道估计信息。
In order to improve the performance of receiver, the technology of RAKE diversity receiving is usually adopted, which needs the exact channel estimation information.
研究表明，采用极化分集技术的MIMO系统具有良好的非相关衰落特性，信道容量得到显著提高。
Simulation results show that MIMO wireless system using polarization diversity is of excellent fading characteristic, and channel capacity is increased effectively.
研究了在时变瑞利衰落信道下，存在反馈时延的选择发送分集（STD）系统的性能。
The performance of selective transmit diversity(STD) with feedback delay is investigated under time-varying Rayleigh channel.
数值模拟表明信道容量与衰落程度和分集的性能有关。
The numerical simulation results show that channel capacity will be affected by fading severity and diversity performance.
在频率选择性信道中，新编码策略可以获得空时频全分集增益。
The new coded strategy can achieve full space-time-frequency diversity over frequency selective fading channel.
得出分集增益不受信道相关性的影响，但是编码增益则有一定的损耗的结论。
Furthermore, we conclude that the channel fading correlation has nothing to do with diversity advantage, but the code advantage will be affected.
WCDMA标准在下行信道传输中采用了称作STTD的开环发射分集方案和两种反馈模式的闭环发射分集方案。
The open loop transmit diversity scheme, named as STTD, and two feedback close loop transmit diversity schemas in downlink channel communication was defined in WCDMA standard.
针对低莱斯因子信道中衰落和码间干扰的影响，提出了带内三重频率分集接收实现方式，给出了采用带内三重频率分集的调制器和解调器的原理框图。
For the influence of fading and ISI on low Rice factor channel, the system adopting diversity technology is presented, and the schematic diagram of the modem adopting diversity technology is given.
本文针对移动信道的特性，综述了分集技术在数字移动通信中的应用。
In this paper applications of diversities directed against the property of the mobile channel for communications are summarized.
在CD MA移动通信系统中，多址接入干扰可以通过多用户检测技术来消除，而分集接收可以减小信道衰落的影响。
In CDMA mobile communication systems, multiple access interference can be cancelled by multiuser detection technique. The degradation by channel fading can be reduced by diversity reception.
仿真结果表明了上述标签延迟发射分集方法的有效性及其信道盲估计方法的性能。
Simulation results demonstrate the validity of the novel labeled-delay transmit diversity scheme and the performance of the blind estimation of frequency-selective channels.
本文首先讨论了移动通信信道的各种参数对信道估计的影响，介绍了频率选择性信道的抽头延迟线模型和分集接收技术，在此基础上阐述了RAKE接收机的原理。
The tapped delay model of the multi-path frequency selective fading channels as well as the diversity receiver technique is introduced, and the principles of RAKE receiver are described.
在一定的信道条件下，存在一个最佳分集度。
Under certain channel conditions, there is an optimal diversity order.
在无线衰落信道环境中，协作中继是一种增加额外分集增益的有效方法，而网络编码可以用来提高网络吞吐量。
In the wireless fading channel environment, cooperative relaying is an effective way to increase additional diversity gain, and network coding can be used to increase network throughput.
时变信道可以提供时间分集，也称为多普勒分集。
Time-varying channel can provide time diversity, also known as the Doppler diversity.
特别是在移动台低速移动，而信道可用径较少的环境下，发送分集技术可以获得相当可观的性能增益。
Transmission diversity can achieve a considerable performance gain especially in the channel that lacks of available paths.
该方法充分利用多用户系统用户分集增益的特点，将信道资源尽量分配给信道质量较高的用户。
The inventive method fully utilizes the user diversity increment of the multi-user system to distribute the channel resource to the user of higher channel quality at most.
但是以往的信道化数字接收技术的研究大部分集中在单个信道的处理上，并没有考虑到信号带宽出现跨信道的问题。
But most of the previous studies for the channelized digital receiver only focused on the handling in a single channel, they didn't take into account the cross-channel problem.
计算机仿真表明，在衰落条件下采用协作分集可以有效地提高信道容量。
We analyze the channel capacity of a relay channel model employing cooperative diversity. Computer simulations show that cooperative diversity can increase the channel capacity substantially.
计算机仿真表明，在衰落条件下采用协作分集可以有效地提高信道容量。
We analyze the channel capacity of a relay channel model employing cooperative diversity. Computer simulations show that cooperative diversity can increase the channel capacity substantially.
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