An Improved OFDM-MSK System for Wireless Communications

Weiwen Weng; Yuan'an Liu; Hefei Hu; Dongming Yuan

ChinaCom2009-Wireless Communications and Networking Symposium

Research Article

An Improved OFDM-MSK System for Wireless Communications

Cite: BibTeX Plain Text

@INPROCEEDINGS{10.1109/CHINACOM.2009.5339923,
    author={Weiwen Weng and Yuan'an Liu and Hefei Hu and Dongming Yuan},
    title={An Improved OFDM-MSK System for Wireless Communications},
    proceedings={ChinaCom2009-Wireless Communications and Networking Symposium},
    publisher={IEEE},
    proceedings_a={CHINACOM2009-WCN},
    year={2009},
    month={11},
    keywords={MSK; Continuous Phase modulation(CPM); CFO; inter-carrier interference(ICI); MLSD; Viterbi Algorithm(VA); OFDM-MSK},
    doi={10.1109/CHINACOM.2009.5339923}
}

Weiwen Weng
Yuan'an Liu
Hefei Hu
Dongming Yuan
Year: 2009
An Improved OFDM-MSK System for Wireless Communications
CHINACOM2009-WCN
IEEE
DOI: 10.1109/CHINACOM.2009.5339923

Weiwen Weng¹, Yuan'an Liu¹^,*, Hefei Hu¹^,*, Dongming Yuan¹^,*

1: Beijing University of Posts and Telecommunications (BUPT), Beijing, China

*Contact email: snow_sun78@hotmail.com, huhefei@bupt.edu.cn, yuandm@bupt.edu.cn

Abstract

As a well attractive modulation scheme, Minimum-shift Keying (MSK) has a fast roll-off side-lobe spectrum. Because of this excellent property, we introduce MSK into the conventional OFDM to form an improved OFDM-MSK system. The new system can effectively overcome the carrier frequency offset (CFO), mitigate the interference among the sub-carriers. And two kinds of OFDM-MSK receiver are discussed in detail. At the same time, two FFT-based sampling modes (Mode A and Mode B) are also proposed and analyzed. And a practical OFDM-MSK structure design is given. Simulation results show that when SNR is high, the BER performance of OFDM-MSK systems outperforms that of OFDM-QPSK systems over AWGN and Rayleigh wireless fading channels. Keywords-

Keywords: MSK; Continuous Phase modulation(CPM); CFO; inter-carrier interference(ICI); MLSD; Viterbi Algorithm(VA); OFDM-MSK

Published: 2009-11-20
Publisher: IEEE
Modified: 2010-05-16

: http://dx.doi.org/10.1109/CHINACOM.2009.5339923