Bayesian Cramér-rao Bound for channel estimation in cooperative OFDM

Abstract

Based on the matrix formulation of cooperative-OFDM signals, the bayesian CRB(BCRB) for blind, semi-blind and non-blind channel estimation in cooperative-OFDM system was derived. The BCRB for semi-blind channel estimation was a generic expression, which could be extrapolated to the BCRB for blind and non-blind channel estimation. The effect of the priori information on BCRB was also discussed. We simulated the performance of the channel estimation. In the simulations, we validate the correctness of the BCRB and evaluate some bayesian channel estimation methods using the BCRB.