Iterative Extended Soft-RLS Algorithm for Joint Channel and Frequency Offset Estimation for Coded MIMO-OFDM Systems

In this paper, we propose an iterative extended soft- RLS (IES-RLS) algorithm for a joint channel and frequency offset estimation for the coded MIMO-OFDM system. In this system, the a posteriori probability for the information bit computed from the channel decoder is used in the MIMO data detector, whose coded soft symbol decision is used in the proposed IES-RLS algorithm. To develop a feasible algorithm, the first order linearization with respect to channel parameters is used. Performance of the IES-RLS algorithm is verified with the Turbo and irregular LDPC codes.