Resource Allocation in OFDMA Networks With Imperfect Channel State Information

被引：19

作者：

Wang, Zhuwei ^{[1
]}

Liu, Lihan ^{[2
]}

Wang, Xiaodong ^{[1
]}

Zhang, Jing ^{[3
]}

机构：

[1] Columbia Univ, Dept Elect Engn, New York, NY 10027 USA

[2] Beijing Univ Posts & Telecommun, Sch Econ & Management, Beijing 100876, Peoples R China

[3] Univ So Calif, Ming Hsieh Dept Elect Engn, Los Angeles, CA 90089 USA

来源：

IEEE COMMUNICATIONS LETTERS | 2014年 / 18卷 / 09期

关键词：

Imperfect CSI; channel assignment; power control; OFDMA; throughput; MULTIUSER OFDM; SYSTEMS; DOWNLINK; CSI;

D O I：

10.1109/LCOMM.2014.2340872

中图分类号：

TN [电子技术、通信技术];

学科分类号：

0809 ;

摘要：

This letter investigates the effect of imperfect channel state information (CSI) on the performance of radio resource management for a downlink multi-user OFDMA system. It is shown that the imperfect CSI introduces a signal-and-power dependent noise term, which makes the symbol error rate (SER) constellation-point dependent, and yields an error floor on the SER. In addition, a two-step multi-user channel, power and constellation allocation algorithm is proposed to maximize the total network throughput.

引用

页码：1611 / 1614

页数：4

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