BCH纠错编码是线性分组码的一种，有较好的纠错能力，信息隐藏是近年来信息安全领域出现的新技术。
BCH codes are a subset of the class of linear block codes that have good error correction capability. Information hiding is a new technique in information security field.
矩阵或H矩阵可以进行线性分组码的编码和译码。
G matrix or H matrix can be linear block code encoding and decoding.
全文共分三部分：分组码的编码、分组码的译码以及卷积码。
This paper consists of three parts: encode and decode of the block codes and the convolutional codes.
针对传统分组码编码算法复杂的问题，实现了对LDPC码的有效编码算法，降低了编码复杂度。
Aimed at the complexity for the coding algorithm of traditional group codes, an effective coding algorithm for LDPC is realized and the coding complexity is reduced.
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.
在码率和编码器复杂程度相同的情况下，卷积码的性能优于分组码。
The performance of convolutional code is superior to block code if their corresponding encoders are the same complicated degree.
帧然后基于特定分组码经编码以提供一致校验比特。
The frames are then coded based on a particular block code to provide parity bits.
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.
环上线性分组码特别是Z_4 -线性分组码，从上世纪90年代起重新获得了编码界的热切关注。
Codes over rings, especially Z_4-linear codes, have received a great deal of interest among coding theorists since 1990s.
目前对空时分组码的性能研究已经比较全面，研究重点开始转移到优化编码结构和降低译码复杂度等方面。
Currently studies on the performance of STBC have been relatively comprehensive, so research focus is shifting to optimize code structure and reduce the decoding complexity.
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.
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.
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