3 . we adopt the convolution coding to be the channel coding 3 .在信道编码部分采用了卷积编码。
Hybrid concatenated convolutional coded modulation ( hctcm ) is studied . performance bound and design criteria of hctcm are given 研究了混合级联卷积编码调制,得到了它的性能限和设计准则。
In chapter 3 , encoder structure and decoder structure and decoding algorithms of hybrid concatenated convolutional code ( hccc ) is studied 第三章研究了混合级联卷积编码的编译码结构、性能限和设计准则。
To decrease error rate , we preprocess the hidden information by convolutional code and decode them by viterbi decoder . 2 在嵌入信息之前先将隐秘信息进行卷积编码,对从隐藏图像检测出的信息使用viterbi译码,以降低误码率。
In the channel coding part of the proposed scheme , each 16 - bit are encapsulated into one code block , which is consisted of information bits and parity bits 信息比特经循环编码,再经过卷积编码组成编码比特( 56比特) ,最后经过交织形成块。
The coding was easy to implemented and we used the viterbi algorithm to decode . at the part of hardware we discussed the hardware implement and show the good performance 卷积编码的编码部分实现是比较容易的,在解码部分采用了viterbi译码算法。
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。
The transmit circuit includes convolutional encoding , framing , differential encoding , shaping filter , pn generator , hopping pattern generator , etc . the main part of receive circuit is matched filter 发送电路包括卷积编码、成帧、差分、成形滤波、 pn发生器和跳频图案发生器等;接收电路的主要部分是匹配滤波器。
The performance bounds and design criteria for hccc are developed . the result for hccc is extended to generalized concatenated coding . encoder , decoder structure and design criteria of generalized concatenated coding are studied 将结果推广到广义的级联卷积编码中,分析了广义级联卷积编码的编码结构、译码算法和设计准则。
Digital tv qpsk modulation in the treatment of the data flow of energy to deal with the proliferation of randomization , rs codeconvolution interleave contraction coding , modulation before forming the base - band processing to ensure that the data transmission performance Qpsk数字电视调制器在对数据流的处理上采用能量扩散的随机化处理rs编码卷积交织收缩卷积编码调制前的基带成形处理等,保证了数据的传输性能。