Decoding method for determining rate-free codes through binary system
A rateless code, binary technology, applied in the field of communication, can solve the problems of high channel transmission error rate, insufficient utilization of frame information, and poor correction ability, etc., and achieve the effect of low error rate, high reliability and strong correction ability.
Inactive Publication Date: 2013-07-17
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF2 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Therefore, the conventional LT code decoding method has defects such as insufficient utilization of received frame information, poor ability to correct error frames, high error rate of channel transmission, and low transmission efficiency.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0021] The transmitter processing steps are:
[0022] Step A. Framing: The original data with a length of 960 bits sent by the source is sent to the framing processing module for framing to form 10 original frames each with a length of 96, and then go to step B;
[0023] Step B. Conventional SBDRC encoding process: first send the 10 original frames S from the previous step i , frame number i=1,...,10, directly sent to step C; then start to generate coded frames, every time a coded frame R with frame number j is generated j , the following encoding processing is required: firstly, in each original frame S i Append a bit 0 to the end to get S' i , then S′ i Perform cyclic shift in the frame to get S″ i , the number of shifts is the product of the original frame number i minus 1 and the current coded frame number j minus 1 and the modulus of the frame length plus 1, which can be expressed by the following formula:
[0024] S″ i = Φ(S' i , (i-1)(j-1)mod 97) formula (1)
[...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a decoding method for determining rate-free codes through a binary system, which comprises the following processes of signal receiving and ordinary processing; frame detection processing; decoding processing and decoding result processing. The decoding method comprises the following steps of: firstly, detecting all original frames, and feeding a confirmation signal back to a transmitter if all the frames are correct frames; otherwise, receiving the next coding frame, performing mutual xor processing on all the original frames, and performing another xor processing on the results together with the received coding frame to obtain a wrong instruction sequence; and obtaining a wrong instruction sequence of each original frame according to the wrong instruction sequence, and performing bit reversal on wrong frames to convert the wrong frames into correct frames. Therefore, compared with the traditional decoding method for determining rate-free codes through the binary system, the invention has the characteristics of strong correction capability on wrong frames in channel transmission, low channel transmission error rate, high system transmission reliability andthe like, and the system transmission capacity, the transmission efficiency and the communication quality are effectively improved.
Description
technical field [0001] The invention belongs to the data (information) transmission technology in the field of communication, in particular to a channel decoding method of system (first send the original frame, then send the coded frame) binary definite rateless code, adopting the decoding method can reduce the channel transmission rate. error rate. Background technique [0002] In data communication, signals often generate errors due to noise, fading or other reasons. In order to ensure communication quality and efficiency, these errors must be controlled and corrected. The common error control technology mainly includes forward error correction (FEC ) and feedback retransmission (ARQ) and other technologies. Forward error correction is a very effective method. Common forward error correction codes, namely channel coding, include Reed-Solomon codes, convolutional codes, turbo codes, and low-density parity-check codes ( LDPC) etc. Forward error correction codes, especiall...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00
Inventor 林灯生张芹肖鸣李少谦
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA