Secure Performance of an Untrusted AF Relay System with a Friendly Wireless Powered Jammer

<div>Probability of nonzero secrecy rate versus transmit power <i>P</i> and required initial jamming power <span class="nowrap"><svg height="13.3428pt" id="M86" style="vertical-align:-4.706901pt" version="1.1" viewbox="-0.0498162 -8.6359 10.2839 13.3428" width="10.2839pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M600 480C600 590 528 650 384 650H143L137 622C222 614 225 607 210 531L130 127C113 41 106 36 23 28L17 0H294L300 28C204 36 195 42 212 127L243 284L314 263C327 263 339 263 352 264C465 271 600 337 600 480ZM508 481C508 351 402 304 329 304C289 304 265 311 250 317L295 559C302 594 310 606 323 611C335 616 350 619 367 619C455 619 508 573 508 481Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,6.656,3.132)"><path d="M303 650H44V622C125 616 133 609 133 525V185C133 100 131 42 123 -6C112 -63 83 -109 27 -136L39 -165C65 -157 98 -138 132 -107C198 -46 218 23 218 152V525C218 609 226 616 303 622V650Z"></path></g></svg>.</span></div>

Mobile Information Systems

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Figure 3

Figure 3: Secure Performance of an Untrusted AF Relay System with a Friendly Wireless Powered Jammer 