On Power-Loading Algorithms for Packet-Access OFDM Systems

被引：3
|
作者：
Tang, Lin [1 ,2 ]
Hu, Honglin [1 ,2 ]
Chen, Hsiao-Hwa [3 ]
机构：
[1] Shanghai Res Ctr Wireless Commun, Shanghai 200335, Peoples R China
[2] Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, Shanghai 200050, Peoples R China
[3] Natl Cheng Kung Univ, Dept Engn Sci, Tainan 701, Taiwan
来源：
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY | 2009年 / 58卷 / 09期
关键词：
Lagrange multiplier; modulation and coding; orthogonal frequency-division multiplexing (OFDM); power loading; throughput; CODED MODULATION; FADING CHANNELS; TRANSMISSION;
D O I：
10.1109/TVT.2009.2026757
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Numerous power-loading techniques for wireless applications have been proposed in the literature. However, most of the existing power-loading schemes may not always be suitable for packet-access orthogonal frequency-division multiplexing (OFDM) systems. In this paper, we propose a Lagrange multiplier power-loading (LMPL) algorithm for packet-access OFDM systems with fixed modulation and coding transmission. The proposed LMPL algorithm offers a closed-form solution for the power-loading optimization problem under a total transmit power constraint. As a closed-form solution may not be available for adaptive modulation and coding (AMC) transmission, we use a low-complexity joint LMPL algorithm to enhance the system throughput. Numerical results show that the proposed LMPL algorithms outperform the traditional channel inversion power-loading (CIPL) scheme. It is also shown that the theoretically derived throughput very well matches the simulation results.
引用
收藏
页码：5324 / 5330
页数：7
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