Improved Adaptive Channel Estimation Algorithm Based on Fast Varying Channel

This paper studied the MIMO-OFDM systems in fast time-varying channel estimation, the three adaptive channel estimation algorithms: RLS the QRD-RLS, IQRD-the RLS, used for the fast time-varying channel comparative studies, and computer simulation. Simulation results show that the three algorithms with similar performance, which, the QRD-the RLS and IQRD-RLS algorithm convergence rate faster than the RLS algorithm for real-time system, the two algorithms more efficient. Therefore, the QRD-the RLS and IQRD-RLS algorithm is more suitable for fast time-varying channel.