A novel constant-power bit loading algorithm for QAM modulated OFDM systems

Author

Song, Yunxia ; Wang, Deqiang ; Li, Man ; Yang, Yuanyuan

Author_Institution

Sch. of Inf. Sci. & Eng., Shandong Univ., Jinan, China

fYear

2010

fDate

17-19 Dec. 2010

Firstpage

1042

Lastpage

1045

Abstract

A bit loading algorithm is presented for orthogonal frequency division multiplexing (OFDM) systems to minimize bit error rate (BER), where quadrature amplitude modulation (QAM) is employed. The target data bits are loaded onto selected subcarriers that have largest remaining signal-to-noise ratio (SNR_rem) values on a group-by-group basis. The number of iterations is determined by the maximum size of embedded constellations independently of the target bit rate. Analysis and simulation results show that the proposed algorithm has appealing merits in computational complexity and BER performance.

Keywords

OFDM modulation; error statistics; quadrature amplitude modulation; QAM modulated OFDM systems; bit error rate; computational complexity; constant-power bit loading algorithm; quadrature amplitude modulation; signal-to-noise ratio; Bit error rate; Computational complexity; Loading; OFDM; Quadrature amplitude modulation; Signal to noise ratio; bit loading; orthogonal frequency division multiplexing (OFDM); quadrature amplitude modulation (QAM); remaining signal to noise ratio;

fLanguage

English

Publisher

ieee

Conference_Titel

Information Theory and Information Security (ICITIS), 2010 IEEE International Conference on

Conference_Location

Beijing

Print_ISBN

978-1-4244-6942-0

Type

conf

DOI

10.1109/ICITIS.2010.5689727

Filename

5689727