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Channel security coding method for resisting joint eavesdropping in relay transmission

A security coding and transmission code technology, which is applied in the field of channel security coding against joint eavesdropping in relay transmission, to achieve the effect of improving energy utilization efficiency, improving security, and reducing eavesdropping performance

Inactive Publication Date: 2020-11-03
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the legal link adopts decoding and forwarding (Decode-and-Forward, DF), the final destination receiver can objectively only decode according to the second hop signal

Method used

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  • Channel security coding method for resisting joint eavesdropping in relay transmission
  • Channel security coding method for resisting joint eavesdropping in relay transmission
  • Channel security coding method for resisting joint eavesdropping in relay transmission

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Embodiment Construction

[0040] The present invention is described in further detail below in conjunction with accompanying drawing:

[0041] refer to figure 1 , the channel security coding method against combined wiretapping in the relay transmission of the present invention comprises the following steps:

[0042] 1) The source node S sends the original information sequence through a dimension M (1) The LDPC code of ×N check matrix is ​​encoded to obtain the systematic code transmission code word c of length N (1) , and then transfer the obtained systematic code to the code word c (1) Modulate and transmit to relay node R;

[0043] The LDPC code used in step 1) is a systematic code, and the check matrix H of the LDPC code used by the source node S to be transmitted to the relay node R (1) In , the first K columns correspond to the bit sequences on the information bits, and the last N-K columns correspond to the bit sequences on the parity bits.

[0044] m (1) ×N parity check matrix H (1) The...

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Abstract

The invention discloses a channel security coding method for resisting joint eavesdropping in relay transmission, which comprises the following steps that: 1) a source node S codes an original information sequence through an LDPC (Low Density Parity Check) code of which the dimension is M (1) * N check matrix to obtain a system code transmission codeword c (1) of which the length is N, and then modulates and transmits the obtained system code transmission codeword c (1) to a relay node R; 2) the relay node R decodes the received data to obtain an information sequence, encodes the information sequence through an LDPC code with a dimension of M (2) * N check matrix to obtain a system code transmission codeword c (2) with a length of N, and modulates and transmits the system code transmissioncodeword c (2) to a destination node D; and 3) the destination node D performs decoding solution according to the received information and a codebook used for transmission so as to recover an original information sequence, and the method can effectively improve the security of information transmission.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a channel security coding method for resisting combined wiretapping in relay transmission. Background technique [0002] In a wireless communication system, due to the power limitation of the sending end, or the distance between the source node and the destination node is far, information cannot be directly transmitted between the two. Therefore, when there is no direct transmission of information between the source node and the destination node, we can use relay forwarding technology to realize the transmission of information. The relay node processes the information received from the source node and then forwards it to the destination node. [0003] In the relay decoding and forwarding communication system, the security of information transmission is also worthy of attention. At present, in the relay transmission system, the commonly used anti-eavesdropping means...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00
CPCH04L1/0063
Inventor 杜清河刘毓黄黎伟
Owner XI AN JIAOTONG UNIV
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