Interference Suppression in a MLT Based Spread Spectrum System with Digital Beamforming

Author

Feng, Xiaotao ; Shang, Yong

Author_Institution

Sch. of Electron. Eng. & Comput. Sci., Peking Univ., Beijing, China

fYear

2010

fDate

24-26 Dec. 2010

Firstpage

113

Lastpage

116

Abstract

In this paper, we improve the traditional expanded time and frequency OFDM (ETF-OFDM) system by using Inverse Modulated Lapped Transform (IMLT)/Modulated Lapped Transform (MLT) instead of Inverse Discrete Fourier Transform (IDFT)/Discrete Fourier Transform (DFT) in the OFDM modulation/demodulation part, respectively. For further interference suppression, we adopt the digital beam forming scheme at the transmitter to null-steering the jammings. Simulation results show that the proposed system has better anti-jamming performance than the conventional DFT-based system.

Keywords

OFDM modulation; array signal processing; demodulation; discrete Fourier transforms; frequency modulation; interference suppression; inverse transforms; jamming; radio transmitters; spread spectrum communication; ETF-OFDM system; IDFT; IMLT; demodulation; digital beamforming scheme; expanded time and frequency OFDM system; interference suppression; inverse discrete fourier transform; inverse modulated lapped transform; jamming; null-steering; spread spectrum system; transmitter; Array signal processing; Frequency domain analysis; Interference; Jamming; OFDM; Time domain analysis; Transforms; ETF; MLT; anti-jamming; null-steering;

fLanguage

English

Publisher

ieee

Conference_Titel

Information Science and Engineering (ISISE), 2010 International Symposium on

Conference_Location

Shanghai

ISSN

2160-1283

Print_ISBN

978-1-61284-428-2

Type

conf

DOI

10.1109/ISISE.2010.116

Filename

5945064