CAJ | 학술논문

针对协作通信系统中信息安全传输这一问题，在包括窃听节点的安全协作网络中，提出一种基于信道判断的中继选择方法，使用概率分布差异度量判断信道类型，在此基础上以最大化遍历保密容量为准则进行中继节点的选择。由于能够准确判断信道的类型，计算得到的保密容量更符合实际情况，基于此的中继选择性能更优。仿真结果表明，在相同条件下，基于该方法的系统遍历保密容量比不做信道判断时大0.5 M bit‐2.5 M bit ，保密容量的大幅度提升对改善协作通信系统的安全性能具有重要现实意义。
침대협작통신계통중신식안전전수저일문제，재포괄절은절점적안전협작망락중，제출일충기우신도판단적중계선택방법，사용개솔분포차이도량판단신도류형，재차기출상이최대화편력보밀용량위준칙진행중계절점적선택。유우능구준학판단신도적류형，계산득도적보밀용량경부합실제정황，기우차적중계선택성능경우。방진결과표명，재상동조건하，기우해방법적계통편력보밀용량비불주신도판단시대0.5 M bit‐2.5 M bit ，보밀용량적대폭도제승대개선협작통신계통적안전성능구유중요현실의의。
Aiming at the information security transmission for the cooperative communication systems including eavesdrop nodes , a relay selection method based on the judgment of channel types was proposed .Probability distribution discrepancy was used to judge the type of fading channels .On this basis ,a relay node for data forwarding to the destination was selected by adopting the principle of maximizing ergodic secrecy capacity .With accurate channel type information ,the calculated secrecy capacity con‐forms to the actual situation better ,which makes the performance of the relay selection more reliably .Results of the simulation indicate that ,under the same conditions ,the ergodic secrecy capacity of system obtained based on the proposed algorithm is 0.5 Mbit‐2.5 Mbit larger than that without channel judgment ,the promoted secrecy capacity is significant to the improvements of system security performance .