Research Article
Cross layer optimization of iterative OFDM reception with clipping
@INPROCEEDINGS{10.1109/WTS.2008.4547565, author={ T. Ketseoglou}, title={Cross layer optimization of iterative OFDM reception with clipping}, proceedings={Wireless Telecommunications Symposium}, publisher={IEEE}, proceedings_a={WTS}, year={2008}, month={6}, keywords={}, doi={10.1109/WTS.2008.4547565} }- T. Ketseoglou
Year: 2008
Cross layer optimization of iterative OFDM reception with clipping
WTS
IEEE
DOI: 10.1109/WTS.2008.4547565
Abstract
An optimized automatic repeat request (ARQ) iterative receiver for orthogonal frequency division multiplexing (OFDM) transmission, suitable for application in double selective multipath channels in the presence of transmitter clipping is presented. The receiver is an optimized maximum aposteriori expectation maximization (MAP-EM) Turbo processor that exploits information from previous, failed transmissions of a packet. The system uses an imbedded pilot structure for initial channel estimation. We show that this configuration achieves performance very close to a system without clipping, even in hard clipping scenarios. Therefore, the proposed scheme represents a very efficient adaptive platform for OFDM ARQ when transmission non-linearities are present.
