文章首先建立了空时分组编码的系统模型，并且介绍了最大似然估计的理论。
This text establishes a model of space-time block code system at first, and also introduces the theory of maximum likelihood estimate.
通过在OFDM通信系统中应用新型差分空时分组码（DSTBC），获得编码增益，无需信道估计。
By using new DSTBC in OFDM communications system channel estimation is nto necessary and coding gain is gotten.
文章提出在空时分组编码的MIMO系统中利用OPAST这种子空间追踪算法进行盲空时多用户检测。
In this paper, the orthogonal projection approximation subspace tracking (OPAST) is employed for channel estimation and space-time multiuser detection in space-time block coded MIMO system.
为了提高水声信道的信道容量，将多输入多输出(MIMO)技术用于水声信道，提出一种基于空时分组编码(STBC)的MIMO通信系统。
To improve the channel capacity, a new Alamouti space-time block coding (STBC) multiple-input multiple-output (MIMO) system was employed for underwater communications.
主要介绍了发射分集技术中用于抗信道衰落和提高系统容量的空时分组码和分层空时码的原理和基本特点，并对这些空时编码技术进行了性能分析。
To overcome the bad performance in combating fading of BLAST and low code rate of STBC, a layered structure STBC is introduced in this article by combining BLAST and STBC.
基于OFDM(正交频分复用)系统，提出了一种新的空频时三维编码，将网格编码调制和差分空时分组码进行组合链接设计。
Based on OFDM system, a novel space-frequency-time code which combined trellis-coded modulation with differential space-time block code was proposed.
基于OFDM(正交频分复用)系统，提出了一种新的空频时三维编码，将网格编码调制和差分空时分组码进行组合链接设计。
Based on OFDM system, a novel space-frequency-time code which combined trellis-coded modulation with differential space-time block code was proposed.
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