给出用特征标构造群码的方法。
Gives a method to construct the group codes by using the character tables.
构造了此类群码的自然状态实现的格子图和它的通过其格子图的途径；
The trellis diagram of the natural state realization of the group code and the path through the trellis diagram of the group code are constructed.
从精确成对错误概率(PEP)出发，推导得到了DUST调制群码符号误码率(sep)的联合边界。
Starting from the precise pair-wise error probability (PEP), the joint border of group coding signal error probability (SEP) in differential unitary space-time (DUST) modulation is deduced.
随着码率的不断增加，酉空时码群中的各个星座点之间的乘积距离会变得越来越小，从而导致性能恶化。
With the increase of the code rate, the production distance between the constellation of the unitary group code decreases rapidly and deteriorates the performance of the system.
本文利用来自不同群的运算，构造一种能证明其安全性的杂凑算法，并应用已证明的结果构造安全的消息认证码。
The construction of a provable hash algorithm is developed based on the operations from various groups, also, a safety message authentication code is presented by the result.
本文给出了一种构造群同步特殊码组的方法。
This paper describes a method of constructing group synchronous special codes.
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分析了将智能算法应用到信号设计中的可行性，并将蚁群算法运用到正交多相编码信号的设计中，对设计的多相码进行了分析研究。
Analyze the feasibility of applying intelligent algorithms to the signal design and design orthogonal polyphase coded signals using the ant colony algorithm.
分析了将智能算法应用到信号设计中的可行性，并将蚁群算法运用到正交多相编码信号的设计中，对设计的多相码进行了分析研究。
Analyze the feasibility of applying intelligent algorithms to the signal design and design orthogonal polyphase coded signals using the ant colony algorithm.
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