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| 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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