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| DFT Phase Estimation Algorithm and Noise Sensitive Frequency Region |
| Li Jiong; Wang Yan-fei |
| Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China |
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Abstract Using the principle of minimum variance, this paper computes the optimal weight coefficients for the phase estimation algorithm of the multi-frequencies signal, which is based on the phase weighted average of the partitions windowed-DFT. The variance formula of the estimator is derived. In addition, the issue of the DFT “noise sensitive frequency region” is precisely analyzed. Simulation results show the effectiveness of the algorithm and the rightness of the analysis.
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Received: 30 April 2008
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2009, Vol. 31 
