DocumentCode
1138915
Title
Adaptive power loading based on unequal-ber strategy for OFDM systems
Author
Liu, Kaiming ; Tang, Bihua ; Liu, Yuan An
Author_Institution
Sch. of Electron. Eng., Beijing Univ. of Posts & Telecommun., Beijing, China
Volume
13
Issue
7
fYear
2009
fDate
7/1/2009 12:00:00 AM
Firstpage
474
Lastpage
476
Abstract
An adaptive power loading algorithm with uniform (nonadaptive) bit allocation is proposed for constant data rate OFDM systems in this letter. This algorithm aims to minimize the transmit power while guaranteeing the target mean bit error rate (BER). The power loading is based on the unequal-BER (UBER) strategy which permits unequal mean BERs on different subcarriers. The closed-form expressions for optimal BER and power distributions are derived. Simulation results indicate the superiority of the proposed algorithm.
Keywords
OFDM modulation; adaptive modulation; error statistics; multipath channels; OFDM systems; adaptive power loading; bit allocation; bit error rate; power distributions; unequal-BER; Bit error rate; Bit rate; Broadband communication; Closed-form solution; Frequency division multiplexing; Modulation coding; OFDM; Partitioning algorithms; Power distribution; Wireless communication;
fLanguage
English
Journal_Title
Communications Letters, IEEE
Publisher
ieee
ISSN
1089-7798
Type
jour
DOI
10.1109/LCOMM.2009.082158
Filename
5166415
Link To Document