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Maximizing the Viterbi Winning Path Metric to Estimate Carrier Frequency and Phase Offsets in Continuous Phase Modulated Signals
KTH, School of Electrical Engineering (EES), Signal Processing.ORCID iD: 0000-0002-4265-9490
2012 (English)Patent (Other (popular science, discussion, etc.))
Abstract [en]

A system and method for estimating carrier frequency offset Δf and carrier phase offset φ0 inherent in a received CPM signal. Samples of a continuous phase modulated (CPM) signal are received. A maximum of an objective function J is determined over a two-dimensional region parameterized by frequency offset v and phase offset w. The coordinates vmax and wmax of a maximizing point in the region represent estimates of the carrier frequency offset Δf and the carrier phase offset φ0. To evaluate the objective function J at a point (v, w), apply a frequency shift of amount −v and a phase shift of amount −w to the received samples to obtain modified samples, and perform Viterbi demodulation on the modified samples to obtain a winning path metric value at a final time. The winning path metric value is the objective function value J(v, w). 

Place, publisher, year, edition, pages
National Category
Electrical Engineering, Electronic Engineering, Information Engineering Signal Processing
URN: urn:nbn:se:kth:diva-120148OAI: diva2:613710
US US8891695-B2 (2014-11-18)

QC 20141201

Available from: 2013-04-01 Created: 2013-04-01 Last updated: 2014-12-01Bibliographically approved

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