| Paper: | SPCOM-P4.6 | ||
| Session: | OFDM Channel Estimation | ||
| Time: | Tuesday, May 16, 16:30 - 18:30 | ||
| Presentation: | Poster | ||
| Topic: | Signal Processing for Communication: Multi-carrier, OFDM, and DMT communication | ||
| Title: | ESTIMATION OF RAPIDLY TIME-VARYING CHANNELS FOR OFDM SYSTEMS | ||
| Authors: | Die Hu, Sotheast University, China; Lianghua He, Tongji University, China; Luxi Yang, Southeast University, China | ||
| Abstract: | Channel estimation for OFDM systems in rapidly timevarying environments is challenging. In this paper, relying on a basis expansion channel model, we propose a scheme for estimating channel parameters varying within a transmission block. Along with the estimation scheme, we also derive the optimal pilot sequence and optimal pilot tone placement with respect to the mean square error (MSE) of the channel estimate. It is shown that the optimal pilot sequence consists of some adjacent equipowered and equispaced subsequences that are constrained by certain phase conditions. Simulation results demonstrate the performance of the proposed scheme in rapidly timevarying scenarios. | ||
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