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학술대회 Time-Varying Channel Estimation in OFDM Systems with Null Subcarriers
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김지형, 남상호, 권동승, 홍대식
Vehicular Technology Conference (VTC) 2008 (Spring), pp.1409-1412
In this paper, we propose a robust channel estimation method in OFDM systems over fast fading channels. In consideration of the effect of null subcarriers, the proposed channel estimation is first performed in the frequency domain. By making efficient use of channel correlation and the property of ICI to reduce the number of needed parameters for channel estimation, robust channel estimation for ICI is accomplished in parallel, pilot cluster by pilot cluster. It is then transformed into the time domain to obtain a gain in noise reduction and to reduce interpolation error as well. Simulation results show that the proposed channel estimation has good performance compared to previous works. ©2008 IEEE.
KSP 제안 키워드
Channel correlation, Channel estimation(CE), Estimation method, Noise reduction(NR), OFDM systems, Robust channel estimation, fast fading channels, frequency domain(FD), interpolation error, null subcarriers, simulation results