MIMO技术总体上可分为发送分集方式和空间复用方式。
MIMO technology can be classified as transmit diversity and spatial multiplexing.
近年来，空时编码作为一种发送分集技术已引起人们广泛的关注。
In recent years space-time coding has attracted wide attention as a transmit diversity technology.
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.
最后证明了采用闭环发送分集方案，可以大大改善接收能干比，提高系统的前向容量。
Finally it is proved that the closed-loop transmission scheme can improve the receiving the energy and the interference ratio and increase the forward-link capacity of the system.
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.
针对WCDMA下行链路空时编码发送分集(STTD)确定了基于最大比合并(mrc)的分集接收方案，并对其进行了性能分析。
According to space time block coding based transmitting antenna diversity (STTD) in the WCDMA system, this paper presents a reception scheme based on maximal ratio combining (MRC).
第三代移动通信系统WCDMA的发送分集方式有两种：开环模式和闭环模式，其中开环模式采用基于空间-时间分组编码的STTD发送分集方式。
There are two modes of transmit diversity for the third generation mobile communication system WCDMA: open-loop mode and the close-loop mode.
第 1 部分集中讲解必要的客户端支持，这种支持允许向iPhone用户发送不同的内容，并允许接受方选择特定的内容，然后全屏显示该站点。
That article concentrates on the support needed on the server side to allow different content to be sent to an iPhone user, as well as allowing that user to opt out and see the full site display.
第2和第3部分集中讲解了实际发送给用户的内容，以及如何使这些内容符合iPhone或iPod touch用户的期望。
Parts 2 and 3 focus on the actual content being sent to the user and how to make that content match the expectations of an iPhone or iPod touch user.
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.
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.
采用空间分集技术，通过使用多发送天线和多接收天线系统（MIMO系统），可以从一定程度上保证传输信号的质量。
With the introduction of space diversity, by using multi -sending antennas and multi -receiving antennas system(MIMO), we can improve the quality of the signals.
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.
通过在发送端采用预编码器，在接收端采用均衡器，可以实现最大分集传输。
Maximum diversity transmission can be achieved by adopting precoder at the transmitter and equalizer at the receiver.
如何从接收到的信号恢复出发送信号，涉及到频率分集接收和均衡。
How to retrieve transmitted signals from received signals concerned with frequency diversity and equalization.
如何从接收到的信号恢复出发送信号，涉及到频率分集接收和均衡。
How to retrieve transmitted signals from received signals concerned with frequency diversity and equalization.
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