Title :
A class of blind phase recovery techniques for higher order QAM modulations: estimators and bounds
Author :
Wang, Yan ; Serpedin, Erchin
Author_Institution :
Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
Abstract :
This letter proposes a class of blind feedforward carrier-phase estimators for higher order quadrature amplitude-modulated transmissions. As an extension of the Viterbi and Viterbi (V&V) estimator, a constellation-dependent optimal matched nonlinear estimator is derived such that its asymptotic variance is minimized. The asymptotic variances of the optimal matched and V&V estimators are established in closed-form expressions and compared. Computer simulations are presented to corroborate the theoretical performance analysis.
Keywords :
feedforward; maximum likelihood estimation; nonlinear estimation; optimisation; phase estimation; quadrature amplitude modulation; 16-QAM constellation; 32-QAM constellation; Viterbi and Viterbi estimator; asymptotic variance minimization; blind feedforward carrier-phase estimators; blind phase recovery techniques; closed-form expressions; computer simulations; higher order QAM modulation; maximum-likelihood feedforward algorithm; optimal matched nonlinear estimator; quadrature amplitude modulation; Amplitude estimation; Amplitude modulation; Computer simulation; Optimal matching; Performance analysis; Phase estimation; Phase modulation; Quadrature amplitude modulation; Signal to noise ratio; Viterbi algorithm;
Journal_Title :
Signal Processing Letters, IEEE
DOI :
10.1109/LSP.2002.804135
