Visible to the public Secure Communication Based on Reliability-Based Hybrid ARQ and LDPC Codes

TitleSecure Communication Based on Reliability-Based Hybrid ARQ and LDPC Codes
Publication TypeConference Paper
Year of Publication2020
AuthorsWang, L., Guo, D.
Conference Name2020 Prognostics and Health Management Conference (PHM-Besançon)
Date Publishedmay
Keywordsadditive white gaussian noise channel, additive white Gaussian noise wire-tap channel, Automatic repeat request, AWGN channels, bit-error rate, channel coding, communication system, composability, Decoding, error statistics, Gaussian approximation, hybrid ARQ, irregular LDPC codes, low-density parity-check codes, low-density parity-check codes., Metrics, network coding, parity check codes, physical-layer security, posteriori probability log-likelihood ratios, probability, pubcrawl, RB-HARQ protocol, re-transmission strategy, re-transmissions, reliability-based hybrid ARQ, reliability-based hybrid automatic repeat-request, resilience, Resiliency, secure communication, security performance, telecommunication network reliability, telecommunication security, unreliable bits, variable nodes
AbstractThis paper designs a re-transmission strategy to intensify the security of communication over the additive white Gaussian noise (AWGN) wire-tap channel. In this scheme, irregular low-density parity-check (LDPC) codes work with reliability-based hybrid automatic repeat-request (RB-HARQ). For irregular LDPC codes, the variable nodes have different degrees, which means miscellaneous protection for the nodes. In RB-HARQ protocol, the legitimate receiver calls for re-transmissions including the most unreliable bits at decoder's outputting. The bits' reliability can be evaluated by the average magnitude of a posteriori probability log-likelihood ratios (APP LLRs). Specifically, this scheme utilizes the bit-error rate (BER) to assess the secrecy performance. Besides, the paper gives close analyses of BER through theoretical arguments and simulations. Results of numerical example demonstrate that RB-HARQ protocol with irregular LDPC codes can hugely reinforce the security performance of the communication system.
Citation Keywang_secure_2020