| Publisher | University of Waterloo | ||
|---|---|---|---|
| Format | 625.1KB PDF, requires Acrobat Rdr 5 | Date added | 01 Jun 2004 |
| Topics | Wireless LAN, Modems, Mobile - Wireless Communications | ||
| Downloads | 62 | ||
In this paper, deliberate level clipping and Turbo-coding are combined to achieve an Orthogonal Frequency Division Multiplexing (OFDM) transmission system with a low Peak-to-Average power Ratio (PAR) and a good performance. Using the linear approximation technique, the metric computation for the Turbo-decoding is first modified in order to consider the distortion effects of the nonlinearity, caused by the Cartesian clipping. The linear approximation of the nonlinear device is based on the Minimum Mean Square Error (MMSE) criterion. By exploiting the linear model, the receiver calculates a modified metric considering the effects of the nonlinearity. Also, this paper introduces a modified Turbo-decoder which simultaneously performs the data estimation and signal reconstruction.
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