A channel estimation scheme with the correlation of the symbols in the time-domain and the subcarrier in OFDM system

摘要

We propose a new pilot symbol assignment and channel estimation procedure to improve the performance of the channel estimation in OFDM systems. One of the elsanuel estimation schemes in the time and frequency domain is the use of a scattered pilot symbol applied in DVBT (Digital Video Broadcasting for digital Terrestrial television) and that uses the pseudo pilot symbols. The proposed scheme estimates the pseudo pilot symbols more accurately to improve the system performance by using the correlation of the symbols in time and frequency domain. We evaluate the BER of the proposed scheme by the computer simulation. As the result, we show that the proposed scheme can improve the BER compared with the conventional scattered pilot symbol scheme.