The Optimal Carrier-Secret Ratio for Wireless Covert Channels Based on Constellation Shaping Modulation

<div>BER of wireless covert channel in typical scenarios. (a) BER of classic scenario with different SNR. (b) BER of one relay with different SNR. (c) BER of two relays with different SNR. (d) Comparison of BER of several scenarios.</div>

Security and Communication Networks

fig13

Figure 13

Figure 13: The Optimal Carrier-Secret Ratio for Wireless Covert Channels Based on Constellation Shaping Modulation 