부산대학교 도서관

In an orthogonal frequency division multiplexing (OFDM), the pilot signal is utilized for the channel estimation (CE). The scattered pilot (SP) reduces the number of pilot signals, but the interpolation is required in the frequency band without the pilot signal. The linear interpolation (LI) is achieved simply. However, many errors are occurred in a multipath fading. The combined complex time frequency interferometry (C-CTFI) is achieved by combining the real and imaginary pilot signals, and the accuracy of the CE is improved by averaging the channel impulse response (CIR) of the different time window. However, a large number of pilot signals is required. To solve these problems, in this paper, we propose the CE based on the LI-CTFI for a SP-OFDM.