Channel Estimation Based on Elimination of Error Accumulation in Time Variant Multi-path OFDM System
A new channel estimation algorithm based on LS algorithm and adjudging guidance algorithm is presented which is applied in the time variant multi-path OFDM system.The new algorithm solves error accumulation propagation in adjudging guidance algorithm.Considering the efficiency of the system,the new algorithm improves reliability greatly compared to adjudging guidance algorithm.The simulation results show that when the frequency of inserting pilots can follows the channel variation rate,error accumulation propagation can be restrained well with the proposed algorithm,and the performance of BER can increase by ten to twenty times.