Subchannel Power-Loading Schemes in Multiuser OFDM Systems

被引：4

作者：

Zhang, Yonghong ^{[1
]}

Leung, Cyril ^{[1
]}

机构：

[1] Univ British Columbia, Dept Elect & Comp Engn, Vancouver, BC V6T 1Z4, Canada

来源：

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY | 2009年 / 58卷 / 09期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Bit loading; multiuser orthogonal frequency-division multiplexing (OFDM); orthogonal frequency-division multiple access (OFDMA); power allocation; water filling; ALGORITHM; ALLOCATION; BIT; CHANNELS;

D O I：

10.1109/TVT.2009.2028430

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：

Achievable bit rates for a number of continuous and discrete bit-loading schemes for multiuser orthogonal frequency-division multiplexing (OFDM) systems are studied. A computationally efficient simple-to-implement discrete bit-loading scheme based on equal-power allocation is proposed and shown to provide close-to-optimal performance. The proposed scheme provides a significant improvement over the traditional discrete equal-power allocation scheme used by medium-access control layer resource-allocation algorithms, particularly when the average user subchannel gains are quite different.

引用

页码：5341 / 5347

页数：7

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