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IEEE Wireless Communications and Netuorking Conference (WC- IEEE Trans Wireless Commun,2003,2(3):519 NC).Shanghai,2013:2999工程科学学报，第 37 卷，第 8 期 techniques to satellite communication / / Proceedings of 2012 IEEE International Symposium on Dynamic Spectrum Access Networks． Washington，2012: 540 ［4］ Biglieri E． An overview of cognitive radio for satellite communica￾tions / / Proceedings of IEEE AESS European Conference on Satel￾lite Telecommunications ( ESTEL) ． Ｒome，2012，1 ［5］ Vassaki S，Poulakis M I，Panagopoulos A D，et al． Power alloca￾tion in cognitive satellite terrestrial networks with QoS constraints． IEEE Commun Lett，2013，17( 7) : 1344 ［6］ Xu D，Feng Z Y，Zhang P． Effective capacity of delay quality-of￾service constrained spectrum sharing cognitive radio with outdated channel feedback． Sci China Inf Sci，2013，56( 6) : 1 ［7］ Musavian L，Assa S． Effective capacity of delay-constrained cog￾nitive radio in Nakagami fading channels． IEEE Trans Wireless Commun，2010，9( 3) : 1054 ［8］ Chen P，Qiu L D，Wang Y． Joint optimization algorithm of detec￾tion threshold and power allocation for satellite underlay cognitive radio． J Xi’an Jiaotong Univ，2013，47( 6) : 31 ( 陈鹏，邱乐德，王宇． 卫星认知无线电检测门限与功率分配 联合优化算法． 西安交通大学学报，2013，47( 6) : 31) ［9］ Dharmawansa P，Ｒajatheva N，Ahmed K． On the distribution of the sum of Nakagami-m random variables． IEEE Trans Commun， 2007，55( 7) : 1407 ［10］ Abdi A，Lau W C，Alouini M S，et al． A new simple model for land mobile satellite channels: first-and second-order statistics． IEEE Trans Wireless Commun，2003，2( 3) : 519 ［11］ Herath S P，Ｒajatheva N，Tellambura C． Energy detection of un￾known signals in fading and diversity reception． IEEE Trans Commun，2011，59( 9) : 2443 ［12］ Wang Y C，Ｒen P Y，Gao F F． Power allocation for statistical QoS provisioning in opportunistic multi-relay DF cognitive net￾works． IEEE Signal Process Lett，2013，20( 1) : 43 ［13］ Vassaki S，Panagopoulos A D，Constantinou P． Effective capaci￾ty and optimal power allocation for mobile satellite systems and services． IEEE Commun Lett，2012，16( 1) : 6 ［14］ Pirmoradian M，Politis C． Power allocation in cognitive spectrum sharing using effective capacity in imperfect fading channel / / Proceedings of International Symposium on Computer Networks and Distributed Systems ( CNDS) ． Tehran，2011: 116 ［15］ Elalem M，Lian Z． Effective capacity and interference constraints in multi-channel cognitive radio network / / Proceedings of IEEE Wireless Communications and Networking Conference ( WCNC) ． Shanghai，2013: 2993 ［16］ Elalem M，Lian Z． Effective capacity optimization for cognitive radio network based on underlay scheme in Gamma fading chan￾nels / / Proceedings of International Conference on Computing， Networking and Communications，Cognitive Computing and Net￾working Symposium． San Diego，2013: 714 ［17］ Elalem M，Lian Z． Effective capacity optimization based on over￾lay CＲ network in Gamma fading environment / / Proceedings of IEEE Wireless Communications and Networking Conference ( WC￾NC) ． Shanghai，2013: 2999 · 4011 ·