Optimum Power Loading with Arbitrary Square MQAM for OFDM Systems

Author

Liu, Kaiming ; Liu, Yuan´an ; Tang, Bihua

Author_Institution

Sch. of Electron. Eng., Beijing Univ. of Posts & Telecommun. (BUPT), Beijing, China

fYear

2009

fDate

24-26 Sept. 2009

Firstpage

1

Lastpage

4

Abstract

An adaptive power loading algorithm for orthogonal frequency division multiplexing (OFDM) systems with given arbitrary square M-ary quadrature amplitude modulation(MQAM) modes on subcarriers is proposed in this paper. This algorithm aims to minimize the total transmit power while guaranteeing the target overall bit error rate (BER), and can achieve the optimum power loading results through optimizing the BER distribution. The closed-form expressions for optimal BER and power distributions are presented. Simulation results indicate the superiority of the proposed algorithm in terms of algorithmic performance and complexity.

Keywords

OFDM modulation; adaptive modulation; error statistics; quadrature amplitude modulation; M-ary quadrature amplitude modulation; OFDM system; adaptive power loading algorithm; arbitrary square M-QAM mode; bit error rate; closed-form expression; orthogonal frequency division multiplexing; Bit error rate; Bit rate; Broadband communication; Closed-form solution; Modulation coding; OFDM modulation; Partitioning algorithms; Power distribution; Power engineering and energy; Quadrature amplitude modulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications, Networking and Mobile Computing, 2009. WiCom '09. 5th International Conference on

Conference_Location

Beijing

Print_ISBN

978-1-4244-3692-7

Electronic_ISBN

978-1-4244-3693-4

Type

conf

DOI

10.1109/WICOM.2009.5303144

Filename

5303144