Improved phase estimation based on complete bispectrum and modified group delay |
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| Authors: | S V Narasimhan Nandini Basumallick Ratana Chaitanya |
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| Affiliation: | (1) Aerospace Electronics and Systems Division, National Aerospace Laboratory, Bangalore, 560017, India;(2) Department of Electronics and Communication Engineering, National Institute of Technology, Surathkal, 57417, Karnataka, India |
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| Abstract: | In this paper, a new method for extracting the system phase from the bispectrum of the system output has been proposed. This
is based on the complete bispectral data computed in the frequency domain and modified group delay. The frequency domain bispectrum computation improves the frequency resolution and the modified
group delay reduces the variance preserving the frequency resolution. The use of full bispectral data also reduces the variance
as it is used for averaging. For the proposed method at a signal to noise ratio of 5dB, the reduction in root mean square
error is in the range of 1.5–7 times over the other methods considered. |
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| Keywords: | Bispectrum Modified group delay Non-minimum phase system identification Phase estimation |
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