Optimal joint power allocation and sub-carrier pairing in amplify-and-forward SC-FDMA relaying networks

• Published in: Electronics letters Vol. 51; no. 1; pp. 120 - 122
• Main Authors: Karimi, A, Sabbaghian, M
• Format: Journal Article
• Language: English
• Published: The Institution of Engineering and Technology 08.01.2015
• Subjects: Allocations; Amplification; amplify and forward communication; amplify‐and‐forward SC‐FDMA relaying networks; Criteria; dual‐hop amplify‐and‐forward; equaliser scheme; equalisers; Frequency division multiple access; frequency domain equaliser schemes; least mean squares methods; minimum mean square error; MMSE; Networks; optimal joint power allocation; optimality of ordered SP; Optimization; Relaying; reverse OSP; scheme; SC‐FDMA network; single‐carrier frequency division multiple access; Strategy; subcarrier pairing; subcarrier pairing strategies; system capacity subject; Wireless communications; zero forcing; ZF criteria; ZF equalisers; least mean squares methods; single-carrier frequency division multiple access; frequency division multiple access; optimal joint power allocation; scheme; minimum mean square error; ZF equalisers; amplify and forward communication; frequency domain equaliser schemes; equaliser scheme; ZF criteria; system capacity subject; zero forcing; equalisers; SC-FDMA network; MMSE; subcarrier pairing strategies; reverse OSP; subcarrier pairing; optimality of ordered SP; dual-hop amplify-and-forward; amplify-and-forward SC-FDMA relaying networks
• ISSN: 0013-5194; 1350-911X; 1350-911X
• DOI: 10.1049/el.2014.2256

Optimal power allocation (PA) and sub-carrier pairing (SP) strategies for a dual-hop amplify-and-forward single-carrier frequency division multiple access network are derived. Frequency domain equalisers based on minimum mean square error (MMSE) and zero forcing (ZF) criteria are considered. For each equaliser, the problem of joint PA and SP is solved to maximise the system capacity subject to the total network power constraint. The optimality of ordered SP (OSP) and reverse OSP scenarios for MMSE and ZF equalisers, respectively, is proved.