Performance of Low-Density Parity-Check (LDPC) Coded OFDM system based on Adaptive Power Allocation Algorithm

Xiaoguang  Wu; Zhi  Zhang; Jun  Jiang; Ping  Zhang

1st International ICST Conference on Communications and Networking in China

Research Article

Performance of Low-Density Parity-Check (LDPC) Coded OFDM system based on Adaptive Power Allocation Algorithm

Cite: BibTeX Plain Text

@INPROCEEDINGS{10.1109/CHINACOM.2006.344715,
    author={Xiaoguang  Wu and  Zhi  Zhang and Jun  Jiang and Ping  Zhang},
    title={Performance of Low-Density Parity-Check (LDPC) Coded OFDM system based on Adaptive Power Allocation Algorithm},
    proceedings={1st International ICST Conference on Communications and Networking in China},
    publisher={IEEE},
    proceedings_a={CHINACOM},
    year={2007},
    month={4},
    keywords={},
    doi={10.1109/CHINACOM.2006.344715}
}

Xiaoguang Wu
Zhi Zhang
Jun Jiang
Ping Zhang
Year: 2007
Performance of Low-Density Parity-Check (LDPC) Coded OFDM system based on Adaptive Power Allocation Algorithm
CHINACOM
IEEE
DOI: 10.1109/CHINACOM.2006.344715

Xiaoguang Wu¹^,*, Zhi Zhang¹^,*, Jun Jiang¹^,*, Ping Zhang¹^,*

1: Wireless Technology Innovation Institute, Beijing University of Posts and Telecommunications, Beijing

*Contact email: skydoorwxg@gmail.com, zhangzhi@bupt.edu.cn, jiangjun@bupt.edu.cn, zhangping@bupt.edu.cn

Abstract

A LDPC-COFDM system model based on adaptive algorithm can allocate transmit power and bits among sub-carriers according to the channel gain of each sub-channel. An adaptive power allocation algorithm, which is beneficial for log likelihood ratio decoding of LDPC coded modulation, is proposed in this paper. The simulation results show that the model can effectively improve the bit-error-rate (BER) performance of the system, compared with the traditional OFDM system based on equal power allocation, adapting to the time-variant behavior of the multi-path fading channel.

Published: 2007-04-10
Publisher: IEEE

: http://dx.doi.org/10.1109/CHINACOM.2006.344715