Minimum symbol error rate carrier phase recovery of QPSK

Authors:
Jake Gunther;Todd Moon
Affiliations:
Department of Electrical and Computer Engineering, Utah State University, Logan, UT;Department of Electrical and Computer Engineering, Utah State University, Logan, UT
Venue:
IEEE Transactions on Signal Processing
Year:
2009

Citing 5
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Abstract

This paper considers the problem of phase recovery of QPSK signals with phase-locked loops (PLL) using two new phase error detectors (PEDs) which are designed to minimize the probability of making a symbol decision error. The new PEDs resemble the PED derived from the maximum likelihood criterion. However, the new PEDs penalize matched filter outputs that are close to decision region boundaries. This penalty gives rise to faster converging PLLs relative to PLLs usingthe maximum likelihood PED, as shpwn in simulation results. The S-curves for the PEDs are used as a tool to gain insight into the behavior of the new PEDs.