电子学报2013，Vol.41Issue(2)：335-339,5.DOI:10.3969/j.issn.0372-2112.2013.02.020
具有时延QoS保证的OFDM中继系统子载波配对与功率分配算法
Subcarrier Pairing and Power Allocation Algorithm for OFDM Relay Systems with Delay QoS Guarantees
摘要
Abstract
In this paper, the subcairier pairing and power allocation algorithm for OFDM decode-and-forward (DF) relay systems with direct link is investigated. The goal is to maximize the system throughput while meeting the delay QoS requirements of transmission services. Firstly, by integrating the effective capacity model, the subcarrier pairing and power allocation problem is formulated as a mixed integer programming problem. Then, the problem is transformed into a continuous relaxed convex problem. By using the convex optimization thecsy, the optimal solution of the primal problem is obtained, and an alternative algorithm to achieve jointly optimal subcarrier pairing and power allocation is proposed.The derived analytical and simulation results show that both the optimal subcarrier pairing and power allocation depend on not only the channel quality of the subcarriers but also the delay QoS requirements of the service. Compared with the existing algorithms,our proposed algorithm achieves the highest effective capacity.关键词
正交频分复用/无线中继/服务质量/子载波配对与功率分配/有效容量/凸优化Key words
orthogonal frequency-division multiplexing (OFDM)/wireless relay/quality of service (QoS)/subcarrier pairing and power allocation/ effective capacity/ convex optimization分类
信息技术与安全科学引用本文复制引用
黄高飞,罗丽平,张广驰,唐冬,秦家银..具有时延QoS保证的OFDM中继系统子载波配对与功率分配算法[J].电子学报,2013,41(2):335-339,5.基金项目
国家自然科学基金(No.61102070,No.61173148) （No.61102070,No.61173148）
广东省教育部产学研结合项目(No.2011B090400581) （No.2011B090400581）
广州市科技计划(No.12C42051578,No.11A11060133) （No.12C42051578,No.11A11060133）
广东省自然科学基金(No.S2011040004135) （No.S2011040004135）
广西省自然科学基金(No.2012GXNSFBA053162) （No.2012GXNSFBA053162）
