中文

Journal of Applied Sciences ›› 2011, Vol. 29 ›› Issue (3): 243-250.doi: 10.3969/j.issn.0255-8297.2011.03.005

• Communication Engineering • Previous Articles     Next Articles

Achievable Secrecy Rate of Multiple-Level Relay-Eavesdropper Channel

CHEN Ying, WANG Bao-yun     

  1. 1. College of Communication and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China
    2. College of Automation, Nanjing University of Posts and Telecommunications, Nanjing 210003, China
    3. State Key Laboratory of Network and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Received:2010-10-23 Revised:2010-12-15 Online:2011-05-26 Published:2011-05-30

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Abstract:

Security of a multiple-level relay-eavesdropper channel is studied, and the rate-equivocation region and achievable secrecy rate are derived in a discrete memoryless channel and a Gaussian channel, respectively. In particular, we analyze the achievable secrecy rate in two-level relay-eavesdropper and one relay-eavesdropper channels in the Gaussian channel under a limited power, and compare their achievable secrecy rate by simulation. The results show that a higher achievable secrecy rate is achieved in the multiple-level relay-eavesdropper channel when the relay node is far away from the source node. Therefore, security of the multiple-level relayeavesdropper channel is generally better.

Key words:  multiple-level, relay-eavesdropper channel, discrete memoryless channel, Gaussian channel, achievable secrecy rate, rate-equivocation

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