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Fig. 4 | EURASIP Journal on Wireless Communications and Networking

Fig. 4

From: Leveraging discrete modulation and liquid metal antennas for interference reduction

Fig. 4

Gap to capacity using PAM input specified in (11). Here \(h_{2}=\sqrt{h_{1}^{4}\frac{P}{N}+\frac{h_{1}^{2}}{2}}\). The top curve ‘blue dashed line’ is the analytic lower bound of Eq. (5). The curve in the middle plotted with ‘green line’ is the analytic lower bound of Prop. 1, and the marker ‘red square’ is the numerical lower bound using Eq. (26). Analytical bounds only need the value of \(d_{{\mathrm{min}} }\left( Y_{i}-Z_{i}\right)\), whereas the numerical bound (26) requires the entire \({\text{supp}}\left[ \sqrt{h_1^2P}X_{i}+\sqrt{h_2^2P}X_{j}\right]\)

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