CAJ | 학술논문

　　该文研究不对称双向中继信道下的被动式再生中继选择问题。首先，通过理论分析给出了传统3节点网络的可达速率域。然后，在瑞利衰落信道环境下，理论推导了系统中断概率的闭合表达式。接着，利用系统业务知识和信道状态信息，提出一种改进型的最大最小中继选择准则。进一步，研究中继端叠加信号的功率分配，提出了两种功率分配因子选择算法，并对所提算法进行了理论分析。仿真结果表明：通过被动式再生中继选择和功率分配可以显著提高系统的中断性能，在信道不对称情况下性能优势明显。
　　해문연구불대칭쌍향중계신도하적피동식재생중계선택문제。수선，통과이론분석급출료전통3절점망락적가체속솔역。연후，재서리쇠락신도배경하，이론추도료계통중단개솔적폐합표체식。접착，이용계통업무지식화신도상태신식，제출일충개진형적최대최소중계선택준칙。진일보，연구중계단첩가신호적공솔분배，제출료량충공솔분배인자선택산법，병대소제산법진행료이론분석。방진결과표명：통과피동식재생중계선택화공솔분배가이현저제고계통적중단성능，재신도불대칭정황하성능우세명현。
The problem of reactive relay selection for two-way decode-and-forward relaying is investigated. First, the achievable rate region of conventional three-node scenario is characterized. Then, a closed-form expression of the outage probability is derived. Next, by using the channel state information and with the aid of traffic knowledge, a reactive relay selection criterion is proposed. Further, optimal power allocation between superposed signals at the relay is investigated. As a result, two novel policies selecting the optimal scaling coefficients are presented and analyzed in terms of outage probability. Simulation results demonstrate that the system outage performance is improved significantly, especially when the channels are asymmetric.