Secrecy Polar Coding in Systems with Probabilistic DF Relay

Huiqing BAI; Liang JIN; Kaizhi HUANG; Ming YI

doi:10.11999/JEIT171142

Volume 40 Issue 9

Aug. 2018

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Huiqing BAI, Liang JIN, Kaizhi HUANG, Ming YI. Secrecy Polar Coding in Systems with Probabilistic DF Relay[J]. Journal of Electronics & Information Technology, 2018, 40(9): 2112-2118. doi: 10.11999/JEIT171142

Citation:

Huiqing BAI, Liang JIN, Kaizhi HUANG, Ming YI. Secrecy Polar Coding in Systems with Probabilistic DF Relay[J]. Journal of Electronics & Information Technology, 2018, 40(9): 2112-2118. doi: 10.11999/JEIT171142

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Secrecy Polar Coding in Systems with Probabilistic DF Relay

doi: 10.11999/JEIT171142

China National Digital Switching System Engineering and Technological R & D Center, Zhengzhou 450002, China

Funds: The Science Fund for Creative Research Groups of the National Natural Science Foundation of China (61521003), The National 863 Program of China (2015AA01A708), The National Natural Science Foundation for Young Scientists of China (61501516)

Received Date: 2017-12-04
Rev Recd Date: 2018-04-26

Available Online: 2018-07-12

Publish Date: 2018-09-01

Abstract

Abstract

A relay aided secrecy polar coding method is proposed for the communication systems where the relay uses Decode-and-Forward (DF) in probability. It ensures the transmission reliability and improves the secrecy rate. First, the transmitter encodes the secrecy bits in two layers: the first layer is designed over the virtual Binary Erasure Channel (BEC) that generated by the probabilistic DF relay, and the second layer is designed over the real transmission channels. After receiving the codeword, relay decodes and extracts the frozen bits which the legitimate user can not obtain directly in probability, and re-encodes them by classical secrecy polar coding. Finally, the receiver decodes the received codewords from the relay and the transmitter in turn. The theory and simulation results verify that the legitimate user is able to decode reliable, while the eavesdropper can not obtain any information about the secrecy bits. Moreover, the secrecy rate increases as the code length and the relay forwarding probability increase, and it outperforms the classical secrecy polar coding method.
- Polar codes,
- Physical layer security,
- Relay,
- Probabilistic Decode-and-Forward (DF)

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References(17)

References

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