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Table 1 Security gap performances with uncoded BPSK, perfect scrambling and FF code 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]
uncoded BPSK −14.94 9.59 24.53
Perf. scramb. 5.15 11.44 6.29
FF coded 4.25 9.8 5.55