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Table 3 Security gap performances with systematic LDPC, perfect scrambled LDPC, LDPC-FF serially concatenated (SC) and LDPC-FF JID (opt./fix.) over the AWGN channel

From: Pre-coded LDPC coding for physical layer security

Code S N R E,m a x [ d B] S N R B,m i n [ d B] S g [dB]
Syst. −11.87 2.835 14.705
Perf. scramb. 0.685 3.49 2.805
SC 0.67 3.285 2.615
JID (opt.) 0.72 2.98 2.26
JID (fix.) 0.62 2.99 2.37