Blind Channel Estimation Algorithm with Simplified Implementation for OFDM System

Fast and reliable channel estimation is very important for wireless communication transmission. A novel One-Cycle blind channel estimation algorithm based on cyclostationarity properties of OFDM signal is proposed in this paper. Without changing cycle frequency, the new algorithm is formed from using the two related z-transform values of delay parameter. Furthermore, a simplified algorithm based on partial spectrum information can further reduce computational complexity. Computer simulation results verify that the performance of the proposed One-Cycle algorithm is superior to that of the existing Two-Cycle algorithm. Although the simplified One-Cycle algorithm has some performance loss in high SNR region, its computational complexity is dramatically reduced.