Nonlinear digital carrier synchronization for Rician fading channels
M.P. Fitz · 2002
The nonlinear digital carrier synchronizer is proposed for phase estimation on the fading channel. This architecture's noncausal structure, efficient digital implementation, hangup-free operation, and near-optimum performance at low signal-to-noise ratio (SNR) are postulated to produce near-ideal bit error probability (BEP) performance in fading channels. A method of evaluating the BEP of a digital quadrature PSK. (QPSK) demodulator in the presence of a noisy phase reference and Rician fading is presented. This result is used to obtain accurate performance approximations for the nonlinear digital carrier synchronization architecture.>