Decision-Directed Feedback Amplitude Estimate for BPSK/QPSK Signal
Pan Shen-fu · Acta Scicentiarum Naturalum Universitis Pekinesis · 2004
After the derivation of Cramer Rao Bound (CRB) for amplitude estimation in AWGN channel, a decision directed feedback amplitude estimation algorithm for BPSK/QPSK signal is proposed, followed by its performance analysis and simulation. The simulation results show that the variance of the algorithm is very close to the CRB at high signal to noise ratio in decision directed feedback mode.