其中基 本的编码方式的约束长度为7、编码效率为1/2的卷积编码（Convolutional Encoding）,再 通过对1/2编码方式进行删余（Puncturing）操作，可以获得码率为2/3和3/4的卷积编码。
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Viterbi punctured convolutional encoding 缩卷积编码
punctured convolutional encoding 可删除卷积编码
Firstly the basic transmitter, including convolutional encoding, interleaving, scrambling, Walsh modulation, quadrature spreading and baseband filtering was studied.
首先研究基本的发射机，包括卷积编码、交织、扰码、沃尔什调制、正交扩频以及基带滤波。
参考来源 - ISAfter that it analyzed various kinds of important function blocks in 802.11a protocol. Then, it focused on the implementation of two important function blocks: they are synchronization block and convolutional encoding/ Viterbi decoding block with FPGA (Field Programmable Gate Array).
接下来重点研究了IEEE802.11a物理层主要的两个功能模块的实现技术:同步模块和卷积码编码与Viterbi译码模块。
参考来源 - 基于IEEE802.11a的码元同步和编译码的FPGA实现The paper proposes a spacial digital watermarking method, which is based on convolutional encoding here. By hiding the watermark in the images LSB, the paper makes it easy to generate or detect and difficult to feel the watermark.
提出了一种基于卷积码的空间域图像数字水印方法,通过将水印加于图像的LSB上,具有生成与检测方便、隐藏性好等特点。
参考来源 - 一种基于卷积码的空间域图像数字水印方法 in C·2,447,543篇论文数据，部分数据来源于NoteExpress
Convolutional encoding is one of encoding methods commonly used in the deep space communication systems and the wireless communication systems.
卷积编码是深空通信系统和无线通信系统中常用的一种编码方式。
The watermark is processed by convolutional encoding and interleaving before embedding, in order to improve the ability for overcoming error bit rate.
水印在嵌入前经过卷积编码和交织处理，以提高其抗误码能力。
Firstly the basic transmitter, including convolutional encoding, interleaving, scrambling, Walsh modulation, quadrature spreading and baseband filtering was studied.
首先研究基本的发射机，包括卷积编码、交织、扰码、沃尔什调制、正交扩频以及基带滤波。
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