Title:
COMPLEX ADAPTIVE PHASE DISCRIMINATOR
Document Type and Number:
WIPO Patent Application WO/2012/078369
Kind Code:
A3
Abstract:
A Complex Adaptive Phase Discriminator (PD), as presented in some concepts of the present disclosure, is an adaptive filter that accurately estimates the instantaneous frequency of a dynamic complex signal. The PD can demonstrate accurate instantaneous frequency estimation and rapid convergence in dynamic complex signal environments, even when the frequency of its input may change rapidly. A direct PD architecture can estimate the instantaneous frequency of a complex primary signal, iteratively adapting a phase of a complex exponential by minimizing the mean squared error of a complex error signal. Instantaneous frequency can be directly estimated from the phase of the complex exponential. In contrast, an indirect PD architecture can estimate the instantaneous frequency of a complex primary signal, iteratively adapting a complex coefficient by minimizing the mean squared error of a complex error signal. Instantaneous frequency can be indirectly estimated by extracting the phase of the complex coefficient.
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Inventors:
TURNER LARRY A (US)
GAO ZHI (US)
GAO ZHI (US)
Application Number:
PCT/US2011/062039
Publication Date:
June 20, 2013
Filing Date:
November 23, 2011
Export Citation:
Assignee:
SCHNEIDER ELECTRIC USA INC (US)
TURNER LARRY A (US)
GAO ZHI (US)
TURNER LARRY A (US)
GAO ZHI (US)
International Classes:
H02P3/14
Foreign References:
| US20090287463A1 | 2009-11-19 |
Attorney, Agent or Firm:
SWINDELLS, Justin, D. et al. (300 S. Riverside Plaza 16th floo, Chicago Illinois, US)
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