A Channel Estimation Algorithm Based on Decision-Directed Algorithm

Estimation technology is one of the key technologies in the Orthogonal Frequency Division Multiplexing (OFDM) system, and the Decision-Directed channel estimation algorithm is paid close attention because of the superiority of decreasing means square error (MSE) and bit error rate (BER). In this paper, a Decision-Directed channel estimation algorithm based on linear minimum mean square error (LMMSE) was proposed, and it is simulated in the white Gaussian noise channel and multipath Rayleigh channel. The result shows that this algorithm has obvious superiority comparing to the other Decision-Directed algorithm in terms of decreasing MSE and BER.