| Paper: | SPCOM-P7.6 | ||
| Session: | UWB and Applications | ||
| Time: | Wednesday, May 17, 16:30 - 18:30 | ||
| Presentation: | Poster | ||
| Topic: | Signal Processing for Communication: Ultra wideband communication | ||
| Title: | Noncoherent Demodulator for PPM-UWB Radios | ||
| Authors: | Liuqing Yang, University of Florida, United States; Ananthram Swami, Army Research Lab, United States | ||
| Abstract: | Low-duty-cycle Ultra-wideband (UWB) radios have the potential to provide low-probability of detection (LPD) communications with low-power and low-complexity implementation. Pulse position modulation (PPM) is a prevalent scheme for UWB radios since it can further lower the transmitter complexity by avoiding pulse negation. However, the position shifts of impulse-like UWB waveforms, together with the severe frequency-selectivity of the propagation channels, aggravate the difficulty and complexity of timing synchronization and channel estimation. To circumvent both of these challenging tasks, we develop a differential encoder and its corresponding noncoherent demodulator for PPM-UWB signals. Relying on integrate-and-dump operations of ``dirty'' templates, our designs are operational when the timing offset and channel information both remain unknown. Analysis and simulations confirm that our scheme can also be applied after imperfect timing acquisition with esidual timing errors. | ||
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