Time-varying channel can provide time diversity, also known as the Doppler diversity.
时变信道可以提供时间分集，也称为多普勒分集。
Space -time coding can increase channel capacity by using the space and time diversity technique.
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。
As the relay node's involvement, the agreement can take full advantage of multi-user cooperative spatial diversity and the time diversity and coding gain from retransmission mechanism.
由于中继节点的参与，该协议可充分利用多用户协作的空间分集和出错重传所带来的时间分集和编码增益。
At one time, ecologists believed that species diversity made ecosystems stable.
生态学家曾一度认为，物种多样性使生态系统变得稳定。
Autumn is usually a good time for immigrant species, but it's the sheer number and diversity this year that's special.
秋季通常都是物种迁入的好时机，但特别的是今年在数量和种类上的陡然增长。
Each time that happened, the population lost a lot of its genetic diversity simply because a lot of people died.
每经过这样一个时期，群体就会因人的大量死亡而失去许多遗传变异。
The authors propose that given the viral fossils' time span and diversity, the insertions likely happened on multiple occasions—possibly over the course of millions of years.
笔者提出，鉴于病毒化石存在时间长，种类多，很多情况下可能发生基因注入，也许经过了数百万年的时间。
He's trying to bring about some unity and conformity in a time when, we historians assume, there was a still a huge amount of diversity.
他是想推行统一教规，我们历史学家认为在那时候，教规还是五花八门的。
At the same time, due to the large diversity in cultures that India has, this is acceptable sometimes and sometimes isn't.
与此同时，由于印度文化具有较大的差异性，这有时被人接受，有时又不能。
Owing to the different philosophical concepts, social patterns, and historical backgrounds, western and eastern time concepts bear great diversity.
由于中西哲学观、社会模式、历史背景的不同，导致中西方对时间的看法有很大的差异性。
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).
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。
Classic scheduling benchmark problem test shows:the self-adaptive measure can efficiently keep current populations diversity, can use very small population size; shortest idle time .
针对作业车间调度问题，提出了最小化空闲时间的处理过程及其变异算子，设计了一种自适应遗传算法。
Whereas the non-orthogonal space-time block codes which obtain higher transmission rate at the cost of orthogonality and partial diversity gain may degrade the performance.
而以牺牲正交性和部分分集增益为代价来获得更高传输速率的非正交空时分组码又会使误码性能降低。
In this paper, we mainly compare the performance of the two space-time codes in many aspects, such as design criterion, transmission rate, diversity gain, code gain and arithmetic complexity etc.
在本文中，本文对这两种编码方式在设计准则、传输速率、分集增益、编码增益和算法复杂性等方面进行了较为详尽的比较研究。
Performance comparison of space time trellis codes and space time transmit diversity is carried out under the same bandwidth efficiency in this paper.
本文在相同频带利用率下将空时格码与空时发射分集的性能进行了比较。
So it is a more wise choice to increase the transmission rate and optimize the time slot block number on the condition of keeping the full diversity order in STBC design.
在保证满分集度的前提下，尽可能提高码率，并优化时延分组数，才是多发射天线构架复信号空时分组码设计的更明智的选择。
In usual spatial-time processing for diversity reception of UWB pulses, the channel delays are not easy to be implemented accurately.
在UW B脉冲信号的角度分集接收中，通常的空时处理中通道时延不易精确地控制。
A diversity antenna system in a mobile unit which provides time, space and antenna pattern diversity to mitigate the effects of fading at a CDMA mobile unit.
一种在移动单元中提供时间、空间和天线图形分集以减弱CD MA移动单元处的衰落影响的分集天线系统。
Space-time trellis code combining space diversity with code and modulation, can improve efficiency and reliability of communication system in wireless channel efficiently.
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；
The research indicated that habitat diversity was the main key factors to control bird species diversity in a certain time and space.
研究表明，在一定时空条件下，地域景观的复杂性是决定鸟类种类和数量的关键因素。
The diversity of its nature, dotted with villages lost in time, as well as different weather conditions, are just a few of the things that make this part of the country unique.
点缀其中的那些被时间遗忘了的村庄，其自然状况和天气条件多种多样，从而使这一地区独具特色与众不同。
Orthogonal transmit diversity (OTD) and space-time spreading (STS) have been included in the 3gpp2 standard, while space-time transmit diversity (STTD) is one part of the 3gpp standard.
包括应用在3gpp 2标准中正交传输分集(otd)和空时扩频(STS)，另外空时传书分集作为3gpp传输标准的一部分。
Music significances are changing, and this diversity is decided by appreciators'interpretations, the time or the geographic regions the appreciators live and so on.
音乐的意义在变化着，这变化取决于欣赏者的解释，取决于欣赏者处于什么时代，什么地理区域等等。
The performance of selective transmit diversity(STD) with feedback delay is investigated under time-varying Rayleigh channel.
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。
For the OFDM system, a scheme of combining space-time code with the adaptive power control technology is proposed with simulation results, which increases the diversity gain and the adaptive gain.
对OFDM系统提出将空时编码与自适应功率控制技术相结合，给出了仿真结果，提高了分集增益和自适应增益。
The new coded strategy can achieve full space-time-frequency diversity over frequency selective fading channel.
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。
It is the time to call for evolutionary genomics which probe into bacterial diversity, niche adaptation, virulence evolution, and drug resistance from the view of whole genome.
以比较基因组学为研究手段，细菌进化基因组学可从基因组水平深入认识物种分化、生境适应、毒力进化、耐药性产生蔓延等表型进化过程。
At the same time, writers of different gender awareness, gender attitude has brought literature written in gender diversity.
与此同时，作家不同的性别意识、性别姿态也带来了文学创作中性别书写的多样化。
At the same time, writers of different gender awareness, gender attitude has brought literature written in gender diversity.
与此同时，作家不同的性别意识、性别姿态也带来了文学创作中性别书写的多样化。
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