Interference Cancellation with Interpolated FFT

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概要

• 論文の詳細を見る

• We present a new method to cancel interfering sinusoidal signals. In this method, the Interpolated FFT (IpFFT) algorithm is used to estimate the parameters of the interference signal: frequency, amplitude and phase. The cancellation is then performed in the time domain. In order for the IpFFT to perform reliably, accurate spectral information about the interference signal is needed. Since, the information signal masks the interference signal, it becomes difficult to estimate the parameters of the interference signal. To alleviate this masking effect, two techniques are discussed here. These techniques involve frame update of interference spectral information of the interference signal, and adaptive averaging. Significant improvement over conventional frequency domain filtering is achieved. The price paid is only little, beyond the computation of the FFT. Comparison with the conventional frequency domain filter shows that our system has approximately 5 dB better cancellation capability for a single interfering signal.

• 社団法人電子情報通信学会の論文
• 1996-03-25

著者

• Jain Vijay

  Department Of Skin V. D. & Leprosy Pt. B. D. S. Post Graduate Institute Of Medical Sciences

• Jain Vijay

  Department Of Dermatology And Std Postgraduate Institute Of Medical Sciences

• HIKAWA Hiroomi

  Department of Computer Science and Intelligent Systems, Oita University

• Hikawa H

  Oita Univ. Oita‐shi Jpn

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