【作者】 吴素文； 朱近康；

【Author】 WU Su-wen ZHU Jin-kang (PCNSS Lab,EElS,University of Science and Technology of China,Hefei,Anhui,230027)

【机构】 中国科学技术大学电子工程与信息科学系；

【摘要】 本文结合编码协作和网络编码的思想,提出了一种新的网络编码协作策略 (Network—Coding—based Coded Cooperation,NCCC)。NCCC 与传统的编码协作策略相比较,主要区别在于:当用户正确解出协作伙伴的第一部分码字后,将协作伙伴剩余码字和自身剩余码字进行网络编码后发送,而不是像传统编码协作中的仅仅发送协作伙伴的剩余码字。分析了 NCCC 的中断概率,并推导了在高信噪比下中断概率的近似表达式,分析表明 NCCC 可以达到二阶的满分集增益。仿真结果表明当用户间信道较差时, 相比于传统的编码协作策略,NCCC 能够提高系统的中断概率性能,同时仿真给出了不同信噪比,不同信道条件下,协作参数的最优值。更多还原

【Abstract】 Based on the coded cooperation and network coding,we propose a novel network-coding-based coded cooperation(NCCC).In this scheme,after the user de- codes the cooperation partner’s information,it transmits the combination of both the partner’s and its own incremental redundancy by using network coding,while in the classical coded cooperation,it transmits only the partner’s incremental redundancy.We derive the outage probability of the NCCC and the approximation in high SNRs.The a- nalysis shows that the proposed NCCC achieves full diversity order.The simulation re- suits show that when the inter-user channel is bad,the NCCC improves the system outage performance relative to classical coded cooperation.Moreover,we give the simu- lation results of the optimal cooperation level under different SNRs,various channel conditions.更多还原