# Secure Information Transmission with Self Jamming SWIPT
### Appendix A.2  
The precoded EH signals at \(R(b)\), denoted as \({X^{\prime}}^{(k)}_{E1}\) and \({X^{\prime}}^{(k)}_{E2}\), are given by:  
\[\begin{split}{X^{\prime}}^{(k)}_{E1}&=X^{(k)}_{E1 }+\epsilon^{(k)}_{A,E1}=A^{(k)}_{E1}(H^{(k)}_{E2R}+\epsilon^{(k)}  
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