计算机工程与设计
計算機工程與設計
계산궤공정여설계
Computer Engineering and Design
2015年
10期
2674-2678
,共5页
协作通信%中继选择%遍历保密容量%信道%矩
協作通信%中繼選擇%遍歷保密容量%信道%矩
협작통신%중계선택%편력보밀용량%신도%구
cooperative communication%relay selection%ergodic secrecy capacity%channels%moment
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。
針對協作通信繫統中信息安全傳輸這一問題,在包括竊聽節點的安全協作網絡中,提齣一種基于信道判斷的中繼選擇方法,使用概率分佈差異度量判斷信道類型,在此基礎上以最大化遍歷保密容量為準則進行中繼節點的選擇。由于能夠準確判斷信道的類型,計算得到的保密容量更符閤實際情況,基于此的中繼選擇性能更優。倣真結果錶明,在相同條件下,基于該方法的繫統遍歷保密容量比不做信道判斷時大0.5 M bit‐2.5 M bit ,保密容量的大幅度提升對改善協作通信繫統的安全性能具有重要現實意義。
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 .