本文给出了几种低码率空时网格码的好码。
In this paper, some optimum low rate space-time trellis codes are proposed.
为获得衰落信道中空时网格码(STTC)的性能估计，对STTC的成对差错概率(PEP)进行了研究。
The pairwise error probability (PEP) of space-time trellis codes (STTC) was investigated to evaluate the performance of STTC over fading channels.
针对这种情况，本文给出了一种空时网格码的正交设计方法。 这种方法可以用来构造大天线数目的码字，从而避免了繁琐的码字搜索过程。
So we put forward an orthogonal method which can be used to design the STTC with large number of transmit antennas and avoid the complicated search for the code.
基于字节码例化的部分计值和网格特性，分析并给出了分布式部分计值架构和实现机制。
It gives the architecture and realization mechanism of distributed partial evaluation based on the Java byte code specialization and grid features.
证明了二维乘积码与其分量码的网格图复杂度之间的一般关系，并分析了二维乘积码的网格图的设计。
The general relationship in trellis complexity between two dimensional product codes and its component codes is proved and the trellis design of product codes is analyzed.
模拟结果显示，分组码采用网格译码，可为移动衰落信道带来显著的性能改善。
Results show that system performance is greatly improved when this trellis decoding method of block codes is adopted.
详细说明了网格资源的动态部署和动态发现，并给出了一种动态资源发现的伪码算法。
Dynamic resource deployment and dynamic resource discovery were explained and proposing a pseudocode arithmetic of dynamic resource discovery.
然后对网格空时码（STTC）和分组空时码（STBC）的编译码原理、特点和性能进行了全面的分析；
Then the encoding and decoding theories, features and performances of STBC and STTC are detailed in all aspects.
但对分集增益而言，网格空时码和分组空时码均可达到系统所能提供的最大分集增益，而分层空时码由于受实现方式的制约，只能得到其中一部分分集增益。
But as to the diversity gains, STCM and STBC can achieve the maximum diversity that the system provides, while LST only obtains a small part of it because of its limited application.
给出了TCMST块码的网格球解码算法，并对TCMST块码的性能进行了仿真，与其他空时块码做了比较，证实了TCMST块码的性能优越性。
Finally, the performance merit of TCMST block code is confirmed by Monte Carlo simulations and compared with other space-time block codes.
已发现它们在密码学应用的研究中和线性分组码最小网格图的研究中很有用途。
They have been found to be useful in certain cryptographic applications and in the studies of minimal trellis diagrams of linear block codes.
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.
与同速率的满秩网格空时码相比，它能获得更好的误码性能，并且实现简单。
Compared with the full rank space-time trellis code (FR-STTC) with the same transmission rate, it can provide a better performance and a lower realization complexity.
与同速率的满秩网格空时码相比，它能获得更好的误码性能，并且实现简单。
Compared with the full rank space-time trellis code (FR-STTC) with the same transmission rate, it can provide a better performance and a lower realization complexity.
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