| Publisher | Institute of Electrical and Electronics Engineers | ||
|---|---|---|---|
| Format | 170.2KB PDF | Date added | 01 Jan 2005 |
| Topics | Wireless LAN, Mobile - Wireless Communications | ||
| Downloads | 13 | ||
This paper presents a vector-based approach to modeling an Orthogonal Frequency Division Multiplexing (OFDM) system with intentional clipping and oversampling at the transmitter. This paper shows how to model the clipping noise as a function of the transmitted signal. The paper also shows that a clipped OFDM channel can be considered to be similar to a MIMO channel, with the addition of a clipping indicator vector which indicates which samples are clipped. This approach allows many existing equalization and detection techniques to be implemented. The authors then present an iterative MMSE receiver based on this model, and show that it outperforms existing techniques. The authors also presents maximum-likelihood estimation of the clipping indicator vector.
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