| Paper: | SPTM-P11.11 | ||
| Session: | Nonlinear Systems and Signal Processing | ||
| Time: | Friday, May 19, 10:00 - 12:00 | ||
| Presentation: | Poster | ||
| Topic: | Signal Processing Theory and Methods: Nonlinear Systems and Signal Processing | ||
| Title: | NOISE ANALYSIS OF MODULATED QUANTZER BASED ON OVERSAMPLED SIGNALS | ||
| Authors: | Yuk-Fan Ho, Queen Mary, University of London, United Kingdom; Wing-Kuen Ling, King's College London, United Kingdom; Joshua Reiss, Queen Mary, University of London, United Kingdom | ||
| Abstract: | In this paper, a noise analysis of a modulated quantizer is performed. If input signals are oversampled, then the quantization noise can be reduced by employing a modulation technique on the input and the output of the quantizer. The working principle is based on the fact that convolutions of bandpass signals can spread wider in the frequency spectrum than that of lowpass signals. Hence, by filtering out the high frequency components, the signal-to-noise ratio (SNR) increases. Numerical simulation results show that the modulated quantization scheme can achieve an average of 10.5dB to 35dB improvements on SNR over the conventional scheme, depends on the number of modulators employed. | ||
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