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Volume 30 Issue 2
Jan.  2011
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Zheng Wen-xiu, Zhao Guo-qing, Luo Ming. Blind Estimation of OFDM Sub-carrier Frequencies Based on the High-Order Cyclic Cumulants[J]. Journal of Electronics & Information Technology, 2008, 30(2): 346-349. doi: 10.3724/SP.J.1146.2006.01093
Citation: Zheng Wen-xiu, Zhao Guo-qing, Luo Ming. Blind Estimation of OFDM Sub-carrier Frequencies Based on the High-Order Cyclic Cumulants[J]. Journal of Electronics & Information Technology, 2008, 30(2): 346-349. doi: 10.3724/SP.J.1146.2006.01093

Blind Estimation of OFDM Sub-carrier Frequencies Based on the High-Order Cyclic Cumulants

doi: 10.3724/SP.J.1146.2006.01093
  • Received Date: 2006-07-21
  • Rev Recd Date: 2007-02-05
  • Publish Date: 2008-02-19
  • Aiming at the real application of the communication countermeasures and OFDM signal demodulation, a method is proposed to estimate the sub-carriers of OFDM signal using the high-order cyclic cumulants. Due to the fact that the high-order cyclic cumulants can suppress the stationary and non-stationary Gaussian noise, it is proved by theoretical analysis under the above noise background that the specific four-order cyclic cumulants of the OFDM signal with the 2/4 PSK modulation exist only at the location of its sub-carriers, so that the sub-carrier estimation can be implemented by detecting the cyclo-frequencies. The proposed method can also be popularized on the OFDM signal with star-QAM and high-order PSK modulation. And simulation proves the effectiveness of the proposed method.
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