Title :
Comparison of four SNR estimators for QPSK modulations
Author :
Beaulieu, Norman C. ; Toms, Andrew S. ; Pauluzzi, David R.
Author_Institution :
Dept. of Electr. & Comput. Eng., Queen´´s Univ., Kingston, Ont., Canada
Abstract :
Four signal-to-noise ratio (SNR) estimators for quaternary phase-shift keying (QPSK)-like signaling are proposed and examined. Two are based on receiver statistics directly related to the SNR while two others are based on receiver statistics inversely related to the SNR. The results show that the estimators based on the inverse of the SNR perform better than the estimators based on the SNR.
Keywords :
delays; digital radio; land mobile radio; mean square error methods; multipath channels; noise; parameter estimation; quadrature phase shift keying; radio receivers; statistical analysis; telecommunication signalling; MSE; QPSK modulation; QPSK-like signaling; SNR estimators; SNR inverse; delay-spread estimator; digital mobile radio systems; mean square error; multipath delay-spread; quaternary phase-shift keying; receiver statistics; signal-to-noise ratio; Delay estimation; Mobile communication; Noise level; Phase estimation; Phase measurement; Phase shift keying; Quadrature phase shift keying; Receivers; Signal to noise ratio; Statistics;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/4234.824751
