Non-orthogonal multiple access(NOMA) has been widely used in the research of the fifth generation communication
due to the advantages of improving the spectrum efficiency and data rate.In order to guarantee the service of users
a new power allocation strategy was proposed to improve the fairness of users in the cell edge.According to the proportional fairness method
the goal was to maximize the proportionality fairness factor among the users with the least fairness in multiplexed users.The nonconvex objective function was transformed into convex function
and the optimal solution of problem was obtained by KKT optimal constraint condition.Simulation results show that the new NOMA-based power allocation strategy proposed outperforms the traditional orthogonal multiple access technology (OMA).
关键词
Keywords
references
ISLAM S M R , AVAZOV N , DOBRE O A . Power-domain non-orthogonal multiple access (NOMA) in 5G systems:potentials and challenges [J ] . IEEE Communications Surveys & Tutorials , 2016 .
OTAO N , KISHIYAMA Y , HIGUCHI K . Performance of non-orthogonal access with SIC in cellular downlink using proportional fair-based resource allocation [C ] // 2012 International Symposium on Wireless Communication Systems (ISWCS) . 2012 : 476 - 480 .
SEYAMA T,DATEKET , SEKI H . Efficient selection of user sets for downlink non-orthogonal multiple access [C ] // 2015 IEEE 26th Annual International Symposium on Personal,Indoor and Mobile Radio Communications-(PIMRC):MAC and Cross-Layer Design . 2015 : 1062 - 1066 .
LIU F , ONEN P M , PETROVA M . Proportional fairness-based user pairing and power allocation for non-orthogonal multiple access [C ] // 2015 IEEE 26th Annual International Symposium on Personal,Indoor and Mobile Radio Communications-(PIMRC):MAC and Cross-Layer Design . 2015 : 1127 - 1131 .
LIU F , ONEN P M , PETROVA M . Proportional fairness-based power allocation and user set selection for downlink NOMA systems [C ] // IEEE ICC 2016-Mobile and Wireless Networking Symposium . 2016 : 1 - 6 .
WANG C L , CHEN J Y . Power allocation for a downlink non-orthogonal multiple access system [J ] . IEEE Wireless Communications Letters , 2016 , 5 ( 5 ): 532 - 535 .
FANG F , ZHANG H J , CHENG J L . Energy-efficient resource allocation for downlink non-orthogonal multiple access network [J ] . IEEE Transactions on Communications , 2016 , 64 ( 9 ): 3722 - 3732 .
BENJEBBOUR A , LI A , SAITO Y . System-level performance of downlink NOMA for future LTE enhancements [C ] // Globecom 2013 Workshop-Emerging Technologies for LTE-Advanced and Beyond-4G . 2013 : 66 - 70 .
SAITO Y , BENJEBBOUR A , KISHIYAMA Y . System-level performance evaluation of downlink non-orthogonal multiple access (NOMA) [C ] // 2013 IEEE 24th International Symposium on Personal,Indoor and Mobile Radio Communications:Fundamentals and PHY Track . 2013 : 611 - 615 .
AL-ABBSAI Z Q , DANIEL K S . Power allocation for sum rate maximization in non-orthogonal multiple access system [C ] // 2015 IEEE 26th International Symposium on Personal,Indoor and Mobile Radio Communications - (PIMRC):Mobile and Wireless Networks . 2015 : 1649 - 1653 .
OVIEDO J A , SADJADPOUR H R . A new NOMA approach for fair power allocation [C ] // 2016 IEEE Conference on Computer Communications Workshops (INFOCOM WKSHPS) . 2016 : 843 - 847 .
DATTA S N , KALYANASUNDARAM S . Optimal power allocation and user selection in non-orthogonal multiple access systems [C ] // IEEE Wireless Communications and Networking Conference (WCNC 2016)Track 2 - MAC and Cross Layer Design . 2016 : 1 - 6 .
AL-ABBASI Z Q , DANIEL K C . User-pairing based non-orthogonal multiple access (NOMA) system [C ] // 2016 IEEE 83rd Vehicular Technology Conference (VTC Spring) . 2016 : 1 - 5 .