Signal source and channel combined optimized adaptive error control method
A technology of channel coding and source coding, which is applied in the field of adaptive error control and error control of joint optimization of source and channel coding, and can solve the problems of time-varying fading of wireless channels, interference deterioration of high-dimensional modulation system performance, and turbo code failure, etc. question
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[0047] See figure 1 , figure 2 As shown, the following takes the TDM communication system as an example, the wavelet SPIHT algorithm is considered for the source coding, and the RCPT code is considered for the channel coding, and the specific implementation steps of the present invention are described with respect to the image service. The present invention is an adaptive error control method for joint optimization of source-channel coding. The specific steps of the method are as follows:
[0048] Step 1: The original image is passed through the wavelet SPIHT image encoder, and the source output code stream is divided into three parts: important, less important and unimportant according to the importance. figure 2 As shown, take k of length k respectively I , k S and k N A 3k-long packet A is formed and sent to the CRC encoder.
[0049] Step 2: After encoding the information packet A obtained in step 1 by CRC, get figure 2 Then send B into the RCPT encoder with a code...
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