| Paper: | SPCOM-L1.3 | ||
| Session: | Frequency/Channel Estimation in OFDM | ||
| Time: | Tuesday, May 18, 13:40 - 14:00 | ||
| Presentation: | Lecture | ||
| Topic: | Signal Processing for Communications: Multi-Carrier, OFDM, and DMT Systems | ||
| Title: | BLIND CFO ESTIMATION IN OFDM SYSTEMS USING DIAGONALITY CRITERION | ||
| Authors: | Timo Roman; Helsinki University of Technology | ||
| Visa Koivunen; Helsinki University of Technology | |||
| Abstract: | In this paper we address the problem of blind carrier frequency offset (CFO) estimation in OFDM systems in the case of frequency selective channels. By assuming real constellations, the proposed blind method enforces a diagonal structure for signal pseudo covariance matrices in frequency domain. Power of non-diagonal elements is minimized. A closed-form solution is derived which leads to accurate and computationally efficient CFO estimation in multipath fading channels. Moreover, in case of complex circularly symmetric noise, the performance does not depend on the SNR. Simulation results are presented using realistic channel model in typical urban scenarios. | ||
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