Intercarrier Interference Cancellation with Frequency Diversity for OFDM Systems

Author

Tang, Shigang ; Gong, Ke ; Song, Jian ; Pan, Changyong ; Yang, Zhixing

Author_Institution

Tsinghua Nat. Lab. for Inf. Sci. & Technol., Tsinghua Univ., Beijing

Volume

53

Issue

1

fYear

2007

fDate

3/1/2007 12:00:00 AM

Firstpage

132

Lastpage

137

Abstract

The implementation of OFDM system suffers from the effect of phase noise (PHN) generated by local oscillator (LO), which disturbs the orthogonality among subcarriers and causes intercarrier interference (ICI). In frequency domain, the received signal can be formulated as the circular convolution of the transmitted signal and the ICI weighting function. In this paper, the symmetric conjugate property of the ICI weighting function is investigated. Based on that, the ICI self-cancellation of symmetric data-conjugate method is studied to suppress PHN. A new ICI cancelling demodulation (ICD) scheme with frequency diversity combining is proposed. Under flat fading channel, the carrier-to-interference ratio (CIR) improvement from this proposed method is larger than 22 dB, and can tolerate a phase noise with standard deviation of 7 deg when BER is 10^-3. In frequency selective fading channel, the proposed method is shown to be able to offer significant diversity gain

Keywords

OFDM modulation; convolution; demodulation; diversity reception; error statistics; fading channels; frequency-domain analysis; intercarrier interference; interference suppression; phase noise; BER; ICD; ICI cancelling demodulation; OFDM system; PHN suppression; bite error rate; circular convolution; flat fading channel; frequency diversity combining; frequency domain analysis; frequency selective fading channel; intercarrier interference; local oscillator; orthogonal frequency division multiplexing; phase noise; standard deviation; symmetric data-conjugate method; Convolution; Demodulation; Diversity reception; Fading; Frequency diversity; Frequency domain analysis; Interference cancellation; Local oscillators; OFDM; Phase noise; Phase noise (PHN); frequency diversity; intercarrier interference (ICI); orthogonal frequency division multiplexing (OFDM);

fLanguage

English

Journal_Title

Broadcasting, IEEE Transactions on

Publisher

ieee

ISSN

0018-9316

Type

jour

DOI

10.1109/TBC.2006.886835

Filename

4118045