Generalized Spectral Coherences for Complex-Valued Harmonizable Processes

  title={Generalized Spectral Coherences for Complex-Valued Harmonizable Processes},
  author={Heidi Hindberg and Alfred Hanssen},
  journal={IEEE Transactions on Signal Processing},
Complex-valued nonstationary random processes have nonvanishing complementary second-order moment functions. In this paper, we propose generalized dual-frequency and time-frequency coherence functions for harmonizable processes. The proposed generalized spectral coherences are based on widely linear estimators, and they result in coherence measures that combine Hermitian and complementary moment functions. We show that for analytic processes, and more surprisingly also for real-valued processes… CONTINUE READING

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