Conference proceeding
Fundamental limits on phase and frequency tracking and estimation in drifting oscillators
2012 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), pp.5225-5228
03/2012
DOI: 10.1109/ICASSP.2012.6289098
Abstract
Distributed beamforming requires phase and frequency synchronization. As oscillators drift, through Brownian motion induced phase noise, their instantaneous phases must be tracked and compensated. Several papers and IEEE 1588 have proposed Kalman Filter (KF) based tracking algorithms using the unwrapped phase measurements. This paper quantifies the effect of Brownian Motion induced drift at two levels. First we derive Cramer-Rao Lower Bounds (CRLB) manifest in one shot estimation of frequency and phase from unwrapped phase observations, and reveal fundamental and illuminating differences with the existing frequency and phase estimation CRLBs in the literature derived in the absence of Brownian motion. Second, we consider a KF that tracks the instantaneous phase in intervals where there is no beamforming, and is switched off during beamforming. Bounds are derived relating the error growth as a function of the underlying duty cycle.
Details
- Title: Subtitle
- Fundamental limits on phase and frequency tracking and estimation in drifting oscillators
- Creators
- D. R Brown - Worcester Polytechnic InstituteR Mudumbai - Worcester Polytechnic InstituteS Dasgupta - University of Iowa
- Resource Type
- Conference proceeding
- Publication Details
- 2012 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), pp.5225-5228
- Publisher
- IEEE
- DOI
- 10.1109/ICASSP.2012.6289098
- ISSN
- 1520-6149
- eISSN
- 2379-190X
- Language
- English
- Date published
- 03/2012
- Academic Unit
- Electrical and Computer Engineering
- Record Identifier
- 9984197521602771
Metrics
99 Record Views