| Paper: | SPTM-P9.10 | ||
| Session: | Nonlinear Systems and Signal Processing | ||
| Time: | Thursday, May 20, 13:00 - 15:00 | ||
| Presentation: | Poster | ||
| Topic: | Signal Processing Theory and Methods: Nonlinear Systems and Signal Processing | ||
| Title: | ON THE BENEFITS OF DELIBERATELY INTRODUCED BASEBAND NONLINEARITIES IN COMMUNICATION SYSTEMS | ||
| Authors: | Hua Qian; Georgia Institute of Technology | ||
| Raviv Raich; Georgia Institute of Technology | |||
| Tong Zhou; Georgia Institute of Technology | |||
| Abstract: | In this paper, we propose a baseband nonlinear transformationtechnique to improve the overall communication system performance, under the peak power constraint. A closed-form expression is derived for the signal-to-noise-and-distortion ratio (SNDR) of certain nonlinear transformations. A strategy for SNR-adaptive optimum clipping is proposed. For orthogonal frequency division multiplexing (OFDM), we show that the optimal clipping ratio leads to an SNDR improvement of 5-7 dB and accompanying decrease in symbol-error-rate. By applying an iterative symbol detection and clipping noise mitigation algorithm at the receiver, we demonstrate that clipping in OFDM can lead to large performance gains. | ||
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