Self-Cancellation of Intercarrier Interference in OFDM Systems with Phase Noise

Author

Tang, Shigang ; Gong, Ke ; Pan, Changyong ; Wang, Jun ; Yang, Zhixing

Author_Institution

Dept. of Electron. Eng., Tsinghua Univ., Beijing

fYear

2006

fDate

11-14 Sept. 2006

Firstpage

1

Lastpage

5

Abstract

The implementation of OFDM system suffers from the effect of phase noise generated by local oscillator (LO), which disturbs the orthogonality between subcarriers and causes intercarrier interference (ICI). In this paper, the symmetric conjugate-negative property of the ICI weighting function is found. Based on that, the ICI self-cancellation of symmetric data-conjugate method is studied to suppress phase noise. The carrier-to-interference ratio (CIR) improvement by this method is shown to be larger than 22 dB in flat fading channel. For a BER of 10^-3, this method can tolerate a phase noise standard deviation of 7 deg in flat fading channel. Moreover, this method could offer frequency diversity gain in frequency selective channels. Both analytical and numerical results show that this method outperforms the conventional schemes

Keywords

OFDM modulation; diversity reception; fading channels; interference suppression; phase noise; radiofrequency interference; OFDM systems; carrier-to-interference ratio; flat fading channel; frequency diversity gain; frequency selective channels; intercarrier interference self-cancellation; local oscillator; phase noise suppression; symmetric conjugate-negative property; symmetric data-conjugate method; Demodulation; Digital communication; Fading; Frequency diversity; Interference; Local oscillators; Microwave generation; OFDM modulation; Phase noise; Voltage-controlled oscillators;

fLanguage

English

Publisher

ieee

Conference_Titel

Personal, Indoor and Mobile Radio Communications, 2006 IEEE 17th International Symposium on

Conference_Location

Helsinki

Print_ISBN

1-4244-0329-4

Electronic_ISBN

1-4244-0330-8

Type

conf

DOI

10.1109/PIMRC.2006.254196

Filename

4022390