Adaptive power loading with BER-constraint for OFDM systems

doi:10.1016/S1005-8885(08)60254-X

中国邮电高校学报(英文) ›› 2009, Vol. 16 ›› Issue (4): 91-97.doi: 10.1016/S1005-8885(08)60254-X

Adaptive power loading with BER-constraint for OFDM systems

刘凯明，赵静，陈昌祥，刘元安

School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China

收稿日期:2008-09-16 修回日期:1900-01-01 出版日期:2009-08-31
通讯作者: 刘凯明

Adaptive power loading with BER-constraint for OFDM systems

LIU Kai-ming, ZHAO Jing, CHEN Chang-xiang, LIU Yuan-an

School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China

Received:2008-09-16 Revised:1900-01-01 Online:2009-08-31
Contact: LIU Kai-ming

摘要/Abstract

摘要：

A novel adaptive power loading algorithm with the constraint of target overall bit error rate (BER) for orthogonal frequency division multiplexing (OFDM) systems is proposed in this article. The proposed algorithm aims to minimize the required transmit power with fixed data rate and uniform (nonadaptive) bit allocation, while guaranteeing the target overall BER. The power loading is based on the unequal-BER (UBER) strategy that allows unequal mean BERs on different subcarriers. The closed-form expressions for optimal BER and power distributions are derived in this article. Simulation results indicate the superiority of the proposed algorithm in terms of BER performance and algorithmic complexity.

关键词:

OFDM,;adaptive;modulation,;power;loading,;unequal-BER,;uniform;bit;allocation

Abstract:

Key words:

OFDM;adaptive modulation;power loading;unequal-BER;uniform bit allocation

LIU Kai-ming, ZHAO Jing, CHEN Chang-xiang, LIU Yuan-an. Adaptive power loading with BER-constraint for OFDM systems[J]. Acta Metallurgica Sinica(English letters), 2009, 16(4): 91-97.

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Adaptive power loading with BER-constraint for OFDM systems

Adaptive power loading with BER-constraint for OFDM systems

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